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A7, Stephanos Tower, Eachamukku, Kakkanadu,Kochi

Android Application Development Training Tutorial

For more info visit

http://www.zybotech.in
http://www.zybotech.in/http://www.zybotech.in/http://www.zybotech.in/

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Home - Home

This is a sample Home application. The Home application that users use to launch applications by default is an

ordinary application itself. A user can install additional Home applications and pick which one to use as the

default Home. This is a sample of such an alternative.

This is actually the source of an old incarnation of the default Home application, which may look familiar if

you played with some of the older pre-1.0 SDKs.

Subdirectories

res/

res - Home

Subdirectories

anim/
http://developer.android.com/resources/samples/Home/res/index.htmlhttp://developer.android.com/resources/samples/Home/res/index.htmlhttp://developer.android.com/resources/samples/Home/res/anim/index.htmlhttp://developer.android.com/resources/samples/Home/res/anim/index.htmlhttp://developer.android.com/resources/samples/Home/res/anim/index.htmlhttp://developer.android.com/resources/samples/Home/res/index.html

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anim - Home

Files

fade_in.xml fade_in.xml The file containing the source code shown below is located in the corresponding directory in

/platforms/android-/samples/...

fade_out.xml

fade_out.xml

The file containing the source code shown below is located in the corresponding directory in/platforms/android-/samples/...
http://developer.android.com/resources/samples/Home/res/anim/fade_in.htmlhttp://developer.android.com/resources/samples/Home/res/anim/fade_in.htmlhttp://developer.android.com/resources/samples/Home/res/anim/fade_out.htmlhttp://developer.android.com/resources/samples/Home/res/anim/fade_out.htmlhttp://developer.android.com/resources/samples/Home/res/anim/fade_out.htmlhttp://developer.android.com/resources/samples/Home/res/anim/fade_in.html

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grid_entry.xml

grid_entry.xml


grid_exit.xml

grid_exit.xml


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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.See the License for the specific language governing permissions andlimitations under the License.

-->

hide_applications.xml

hide_applications.xml


show_applications.xml color/ drawable/ drawable-hdpi/ drawable-land/ drawable-mdpi/ drawable-port/ layout/ layout-land/ layout-port/ values/ values-cs/ values-de-rDE/ values-es-rUS/
http://developer.android.com/resources/samples/Home/res/anim/hide_applications.htmlhttp://developer.android.com/resources/samples/Home/res/anim/hide_applications.htmlhttp://developer.android.com/resources/samples/Home/res/anim/show_applications.htmlhttp://developer.android.com/resources/samples/Home/res/anim/show_applications.htmlhttp://developer.android.com/resources/samples/Home/res/color/index.htmlhttp://developer.android.com/resources/samples/Home/res/color/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-hdpi/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-hdpi/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-land/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-land/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-mdpi/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-mdpi/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-port/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-port/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout-land/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout-land/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout-port/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout-port/index.htmlhttp://developer.android.com/resources/samples/Home/res/values/index.htmlhttp://developer.android.com/resources/samples/Home/res/values/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-cs/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-cs/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-de-rDE/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-de-rDE/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-es-rUS/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-es-rUS/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-es-rUS/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-de-rDE/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-cs/index.htmlhttp://developer.android.com/resources/samples/Home/res/values/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout-port/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout-land/index.htmlhttp://developer.android.com/resources/samples/Home/res/layout/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-port/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-mdpi/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-land/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable-hdpi/index.htmlhttp://developer.android.com/resources/samples/Home/res/drawable/index.htmlhttp://developer.android.com/resources/samples/Home/res/color/index.htmlhttp://developer.android.com/resources/samples/Home/res/anim/show_applications.htmlhttp://developer.android.com/resources/samples/Home/res/anim/hide_applications.html

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values-land/ values-nl-rNL/ src/

Files

AndroidManifest.xml

values-land - Home

Files

strings.xml

strings.xml


Tap image to set landscape wallpaper

values-nl-rNL - Home

Files

strings.xml
http://developer.android.com/resources/samples/Home/res/values-land/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-land/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-nl-rNL/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-nl-rNL/index.htmlhttp://developer.android.com/resources/samples/Home/src/index.htmlhttp://developer.android.com/resources/samples/Home/src/index.htmlhttp://developer.android.com/resources/samples/Home/AndroidManifest.htmlhttp://developer.android.com/resources/samples/Home/AndroidManifest.htmlhttp://developer.android.com/resources/samples/Home/res/values-land/strings.htmlhttp://developer.android.com/resources/samples/Home/res/values-land/strings.htmlhttp://developer.android.com/resources/samples/Home/res/values-nl-rNL/strings.htmlhttp://developer.android.com/resources/samples/Home/res/values-nl-rNL/strings.htmlhttp://developer.android.com/resources/samples/Home/res/values-nl-rNL/strings.htmlhttp://developer.android.com/resources/samples/Home/res/values-land/strings.htmlhttp://developer.android.com/resources/samples/Home/AndroidManifest.htmlhttp://developer.android.com/resources/samples/Home/src/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-nl-rNL/index.htmlhttp://developer.android.com/resources/samples/Home/res/values-land/index.html

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strings.xml


"Start""Alles""Achtergrond""Zoeken""Tik op afbeelding om portretachtergrond in te

stellen"

src - Home

Subdirectories

com/

com - Home

Subdirectories

example/

example - Home

Subdirectories

android/android - Home

Subdirectories

home/

home - HomeFiles
http://developer.android.com/resources/samples/Home/src/com/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/index.htmlhttp://developer.android.com/resources/samples/Home/src/com/index.html

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ApplicationInfo.java

ApplicationInfo.java


/** Copyright (C) 2007 The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0*

* Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/

package com.example.android.home;

import android.content.ComponentName;import android.content.Intent;import android.graphics.drawable.Drawable;

/*** Represents a launchable application. An application is made of a name (or title), anintent* and an icon.*/

class ApplicationInfo {/*** The application name.*/

CharSequence title;

/*** The intent used to start the application.

*/Intent intent;

/*** The application icon.*/

Drawable icon;

/*** When set to true, indicates that the icon has been resized.*/

boolean filtered;

/*** Creates the application intent based on a component name and various launch flags.** @param className the class name of the component representing the intent
http://developer.android.com/resources/samples/Home/src/com/example/android/home/ApplicationInfo.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/ApplicationInfo.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/ApplicationInfo.html

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* @param launchFlags the launch flags*/

final void setActivity(ComponentName className, int launchFlags) {intent = new Intent(Intent.ACTION_MAIN);intent.addCategory(Intent.CATEGORY_LAUNCHER);intent.setComponent(className);

intent.setFlags(launchFlags);}

@Overridepublic boolean equals(Object o) {

if (this == o) {return true;

}if (!(o instanceof ApplicationInfo)) {

return false;}

ApplicationInfo that = (ApplicationInfo) o;

return title.equals(that.title) &&intent.getComponent().getClassName().equals(

that.intent.getComponent().getClassName());}

@Overridepublic int hashCode() {

int result;result = (title != null ? title.hashCode() : 0);final String name = intent.getComponent().getClassName();result = 31 * result + (name != null ? name.hashCode() : 0);return result;

}

}

ApplicationsStackLayout.java ApplicationsStackLayout.java The file containing the source code shown below is located in the corresponding directory in

/platforms/android-/samples/... /*

* Copyright (C) 2007 The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/


import android.content.Context;import android.content.Intent;
http://developer.android.com/resources/samples/Home/src/com/example/android/home/ApplicationsStackLayout.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/ApplicationsStackLayout.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/ApplicationsStackLayout.html

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import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Rect;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.view.View;

import android.view.ViewGroup;import android.view.LayoutInflater;import android.widget.TextView;

import java.util.List;

/*** The ApplicationsStackLayout is a specialized layout used for the purpose of the

home screen* only. This layout stacks various icons in three distinct areas: the recents, the

favorites* (or faves) and the button.*

* This layout supports two different orientations: vertical and horizontal. Whenhorizontal,* the areas are laid out this way:** [RECENTS][FAVES][BUTTON]** When vertical, the layout is the following:** [RECENTS]* [FAVES]* [BUTTON]** The layout operates from the "bottom up" (or from right to left.) This means

that the button* area will first be laid out, then the faves area, then the recents. When there

are too many* favorites, the recents area is not displayed.** The following attributes can be set in XML:** orientation: horizontal or vertical* marginLeft: the left margin of each element in the stack* marginTop: the top margin of each element in the stack* marginRight: the right margin of each element in the stack* marginBottom: the bottom margin of each element in the stack*/

public class ApplicationsStackLayout extends ViewGroup implementsView.OnClickListener {

public static final int HORIZONTAL = 0;public static final int VERTICAL = 1;

private View mButton;private LayoutInflater mInflater;

private int mFavoritesEnd;private int mFavoritesStart;

private List mFavorites;private List mRecents;

private int mOrientation = VERTICAL;

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private int mMarginLeft;private int mMarginTop;private int mMarginRight;private int mMarginBottom;

private Rect mDrawRect = new Rect();

private Drawable mBackground;private int mIconSize;

public ApplicationsStackLayout(Context context) {super(context);initLayout();

}

public ApplicationsStackLayout(Context context, AttributeSet attrs) {super(context, attrs);

TypedArray a =

context.obtainStyledAttributes(attrs,R.styleable.ApplicationsStackLayout);

mOrientation =a.getInt(R.styleable.ApplicationsStackLayout_stackOrientation, VERTICAL);

mMarginLeft =a.getDimensionPixelSize(R.styleable.ApplicationsStackLayout_marginLeft, 0);

mMarginTop =a.getDimensionPixelSize(R.styleable.ApplicationsStackLayout_marginTop, 0);

mMarginRight =a.getDimensionPixelSize(R.styleable.ApplicationsStackLayout_marginRight, 0);

mMarginBottom =

a.getDimensionPixelSize(R.styleable.ApplicationsStackLayout_marginBottom, 0);

a.recycle();

mIconSize = 42; //(int)getResources().getDimension(android.R.dimen.app_icon_size);

initLayout();}

private void initLayout() {mInflater = LayoutInflater.from(getContext());mButton = mInflater.inflate(R.layout.all_applications_button, this, false);

addView(mButton);

mBackground = getBackground();setBackgroundDrawable(null);setWillNotDraw(false);

}

/*** Return the current orientation, either VERTICAL (default) or HORIZONTAL.** @return the stack orientation*/public int getOrientation() {

return mOrientation;}

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@Overrideprotected void onDraw(Canvas canvas) {

final Drawable background = mBackground;

final int right = getWidth();final int bottom = getHeight();

// Draw behind recentsif (mOrientation == VERTICAL) {

mDrawRect.set(0, 0, right, mFavoritesStart);} else {

mDrawRect.set(0, 0, mFavoritesStart, bottom);}background.setBounds(mDrawRect);background.draw(canvas);

// Draw behind favoritesif (mFavoritesStart > -1) {

if (mOrientation == VERTICAL) {

mDrawRect.set(0, mFavoritesStart, right, mFavoritesEnd);} else {

mDrawRect.set(mFavoritesStart, 0, mFavoritesEnd, bottom);}background.setBounds(mDrawRect);background.draw(canvas);

}

super.onDraw(canvas);}

@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

final int widthMode = MeasureSpec.getMode(widthMeasureSpec);final int widthSize = MeasureSpec.getSize(widthMeasureSpec);

final int heightMode = MeasureSpec.getMode(heightMeasureSpec);final int heightSize = MeasureSpec.getSize(heightMeasureSpec);

if (widthMode != MeasureSpec.EXACTLY || heightMode != MeasureSpec.EXACTLY){

throw new IllegalStateException("ApplicationsStackLayout can only beused with "

+ "measure spec mode=EXACTLY");

}

setMeasuredDimension(widthSize, heightSize);}

@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {

removeAllApplications();

LayoutParams layoutParams = mButton.getLayoutParams();final int widthSpec = MeasureSpec.makeMeasureSpec(layoutParams.width,

MeasureSpec.EXACTLY);final int heightSpec = MeasureSpec.makeMeasureSpec(layoutParams.height,

MeasureSpec.EXACTLY);mButton.measure(widthSpec, heightSpec);

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if (mOrientation == VERTICAL) {layoutVertical();

} else {layoutHorizontal();

}}

private void layoutVertical() {int childLeft = 0;int childTop = getHeight();

int childWidth = mButton.getMeasuredWidth();int childHeight = mButton.getMeasuredHeight();

childTop -= childHeight + mMarginBottom;mButton.layout(childLeft, childTop, childLeft + childWidth, childTop +

childHeight);childTop -= mMarginTop;mFavoritesEnd = childTop - mMarginBottom;

int oldChildTop = childTop;childTop = stackApplications(mFavorites, childLeft, childTop);if (childTop != oldChildTop) {

mFavoritesStart = childTop + mMarginTop;} else {

mFavoritesStart = -1;}

stackApplications(mRecents, childLeft, childTop);}

private void layoutHorizontal() {

int childLeft = getWidth();int childTop = 0;

int childWidth = mButton.getMeasuredWidth();int childHeight = mButton.getMeasuredHeight();

childLeft -= childWidth;mButton.layout(childLeft, childTop, childLeft + childWidth, childTop +

childHeight);childLeft -= mMarginLeft;mFavoritesEnd = childLeft - mMarginRight;

int oldChildLeft = childLeft;

childLeft = stackApplications(mFavorites, childLeft, childTop);if (childLeft != oldChildLeft) {

mFavoritesStart = childLeft + mMarginLeft;} else {

mFavoritesStart = -1;}

stackApplications(mRecents, childLeft, childTop);}

private int stackApplications(List applications, intchildLeft, int childTop) {

LayoutParams layoutParams;

int widthSpec;int heightSpec;int childWidth;

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int childHeight;

final boolean isVertical = mOrientation == VERTICAL;

final int count = applications.size();for (int i = count - 1; i >= 0; i--) {

final ApplicationInfo info = applications.get(i);final View view = createApplicationIcon(mInflater, this, info);

layoutParams = view.getLayoutParams();widthSpec = MeasureSpec.makeMeasureSpec(layoutParams.width,

MeasureSpec.EXACTLY);heightSpec = MeasureSpec.makeMeasureSpec(layoutParams.height,

MeasureSpec.EXACTLY);view.measure(widthSpec, heightSpec);

childWidth = view.getMeasuredWidth();childHeight = view.getMeasuredHeight();

if (isVertical) {childTop -= childHeight + mMarginBottom;

if (childTop < 0) {childTop += childHeight + mMarginBottom;break;

}} else {

childLeft -= childWidth + mMarginRight;

if (childLeft < 0) {childLeft += childWidth + mMarginRight;break;

}}

addViewInLayout(view, -1, layoutParams);

view.layout(childLeft, childTop, childLeft + childWidth, childTop +childHeight);

if (isVertical) {childTop -= mMarginTop;

} else {childLeft -= mMarginLeft;

}

}

return isVertical ? childTop : childLeft;}

private void removeAllApplications() {final int count = getChildCount();for (int i = count - 1; i >= 0; i--) {

final View view = getChildAt(i);if (view != mButton) {

removeViewAt(i);}

}

}

private View createApplicationIcon(LayoutInflater inflater,

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ViewGroup group, ApplicationInfo info) {

TextView textView = (TextView) inflater.inflate(R.layout.favorite, group,false);

info.icon.setBounds(0, 0, mIconSize, mIconSize);

textView.setCompoundDrawables(null, info.icon, null, null);textView.setText(info.title);

textView.setTag(info.intent);textView.setOnClickListener(this);

return textView;}

/*** Sets the list of favorites.** @param applications the applications to put in the favorites area

*/public void setFavorites(List applications) {

mFavorites = applications;requestLayout();

}

/*** Sets the list of recents.** @param applications the applications to put in the recents area*/public void setRecents(List applications) {

mRecents = applications;

requestLayout();}

public void onClick(View v) {getContext().startActivity((Intent) v.getTag());

}}

Home.java Home.java The file containing the source code shown below is located in the corresponding directory in

/platforms/android-/samples/... /*

* Copyright (C) 2007 The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and* limitations under the License.*/
http://developer.android.com/resources/samples/Home/src/com/example/android/home/Home.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/Home.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/Home.html

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import android.app.Activity;import android.app.ActivityManager;import android.app.SearchManager;

import android.content.BroadcastReceiver;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.content.pm.ActivityInfo;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.PaintFlagsDrawFilter;import android.graphics.PixelFormat;

import android.graphics.Rect;import android.graphics.ColorFilter;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.graphics.drawable.PaintDrawable;import android.os.Bundle;import android.os.Environment;import android.util.Log;import android.util.Xml;import android.view.KeyEvent;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;

import android.view.View;import android.view.ViewGroup;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.view.animation.LayoutAnimationController;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.CheckBox;import android.widget.GridView;import android.widget.TextView;

import java.io.IOException;import java.io.FileReader;

import java.io.File;import java.io.FileNotFoundException;import java.util.ArrayList;import java.util.Collections;import java.util.LinkedList;import java.util.List;

import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;

public class Home extends Activity {/*** Tag used for logging errors.

*/private static final String LOG_TAG = "Home";

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/*** Keys during freeze/thaw.*/private static final String KEY_SAVE_GRID_OPENED = "grid.opened";

private static final String DEFAULT_FAVORITES_PATH = "etc/favorites.xml";

private static final String TAG_FAVORITES = "favorites";private static final String TAG_FAVORITE = "favorite";private static final String TAG_PACKAGE = "package";private static final String TAG_CLASS = "class";

// Identifiers for option menu itemsprivate static final int MENU_WALLPAPER_SETTINGS = Menu.FIRST + 1;private static final int MENU_SEARCH = MENU_WALLPAPER_SETTINGS + 1;private static final int MENU_SETTINGS = MENU_SEARCH + 1;

/*** Maximum number of recent tasks to query.

*/private static final int MAX_RECENT_TASKS = 20;

private static boolean mWallpaperChecked;private static ArrayList mApplications;private static LinkedList mFavorites;

private final BroadcastReceiver mWallpaperReceiver = newWallpaperIntentReceiver();

private final BroadcastReceiver mApplicationsReceiver = newApplicationsIntentReceiver();

private GridView mGrid;

private LayoutAnimationController mShowLayoutAnimation;private LayoutAnimationController mHideLayoutAnimation;

private boolean mBlockAnimation;

private boolean mHomeDown;private boolean mBackDown;

private View mShowApplications;private CheckBox mShowApplicationsCheck;

private ApplicationsStackLayout mApplicationsStack;

private Animation mGridEntry;private Animation mGridExit;

@Overridepublic void onCreate(Bundle icicle) {

super.onCreate(icicle);

setDefaultKeyMode(DEFAULT_KEYS_SEARCH_LOCAL);

setContentView(R.layout.home);

registerIntentReceivers();

setDefaultWallpaper();

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loadApplications(true);

bindApplications();bindFavorites(true);bindRecents();bindButtons();

mGridEntry = AnimationUtils.loadAnimation(this, R.anim.grid_entry);mGridExit = AnimationUtils.loadAnimation(this, R.anim.grid_exit);

}

@Overrideprotected void onNewIntent(Intent intent) {

super.onNewIntent(intent);

// Close the menuif (Intent.ACTION_MAIN.equals(intent.getAction())) {

getWindow().closeAllPanels();}

}

@Overridepublic void onDestroy() {

super.onDestroy();

// Remove the callback for the cached drawables or we leak// the previous Home screen on orientation changefinal int count = mApplications.size();for (int i = 0; i < count; i++) {

mApplications.get(i).icon.setCallback(null);}

unregisterReceiver(mWallpaperReceiver);unregisterReceiver(mApplicationsReceiver);

}

@Overrideprotected void onResume() {

super.onResume();bindRecents();

}

@Overrideprotected void onRestoreInstanceState(Bundle state) {

super.onRestoreInstanceState(state);

final boolean opened = state.getBoolean(KEY_SAVE_GRID_OPENED, false);if (opened) {

showApplications(false);}

}

@Overrideprotected void onSaveInstanceState(Bundle outState) {

super.onSaveInstanceState(outState);outState.putBoolean(KEY_SAVE_GRID_OPENED, mGrid.getVisibility() ==

View.VISIBLE);}

/*** Registers various intent receivers. The current implementation registers* only a wallpaper intent receiver to let other applications change the

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* wallpaper.*/private void registerIntentReceivers() {

IntentFilter filter = new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED);registerReceiver(mWallpaperReceiver, filter);

filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);filter.addAction(Intent.ACTION_PACKAGE_REMOVED);filter.addAction(Intent.ACTION_PACKAGE_CHANGED);filter.addDataScheme("package");registerReceiver(mApplicationsReceiver, filter);

}

/*** Creates a new appplications adapter for the grid view and registers it.*/private void bindApplications() {

if (mGrid == null) {mGrid = (GridView) findViewById(R.id.all_apps);

}mGrid.setAdapter(new ApplicationsAdapter(this, mApplications));mGrid.setSelection(0);

if (mApplicationsStack == null) {mApplicationsStack = (ApplicationsStackLayout)

findViewById(R.id.faves_and_recents);}

}

/*** Binds actions to the various buttons.*/

private void bindButtons() {mShowApplications = findViewById(R.id.show_all_apps);mShowApplications.setOnClickListener(new ShowApplications());mShowApplicationsCheck = (CheckBox) findViewById(R.id.show_all_apps_check);

mGrid.setOnItemClickListener(new ApplicationLauncher());}

/*** When no wallpaper was manually set, a default wallpaper is used instead.*/private void setDefaultWallpaper() {

if (!mWallpaperChecked) {

Drawable wallpaper = peekWallpaper();if (wallpaper == null) {

try {clearWallpaper();

} catch (IOException e) {Log.e(LOG_TAG, "Failed to clear wallpaper " + e);

}} else {

getWindow().setBackgroundDrawable(new ClippedDrawable(wallpaper));}mWallpaperChecked = true;

}}

/*** Refreshes the favorite applications stacked over the all apps button.

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* The number of favorites depends on the user.*/private void bindFavorites(boolean isLaunching) {

if (!isLaunching || mFavorites == null) {

if (mFavorites == null) {

mFavorites = new LinkedList();} else {

mFavorites.clear();}mApplicationsStack.setFavorites(mFavorites);

FileReader favReader;

// Environment.getRootDirectory() is a fancy way of saying ANDROID_ROOTor "/system".

final File favFile = new File(Environment.getRootDirectory(),DEFAULT_FAVORITES_PATH);

try {

favReader = new FileReader(favFile);} catch (FileNotFoundException e) {

Log.e(LOG_TAG, "Couldn't find or open favorites file " + favFile);return;

}

final Intent intent = new Intent(Intent.ACTION_MAIN, null);intent.addCategory(Intent.CATEGORY_LAUNCHER);

final PackageManager packageManager = getPackageManager();

try {final XmlPullParser parser = Xml.newPullParser();

parser.setInput(favReader);

beginDocument(parser, TAG_FAVORITES);

ApplicationInfo info;

while (true) {nextElement(parser);

String name = parser.getName();if (!TAG_FAVORITE.equals(name)) {

break;}

final String favoritePackage = parser.getAttributeValue(null,TAG_PACKAGE);

final String favoriteClass = parser.getAttributeValue(null,TAG_CLASS);

final ComponentName cn = new ComponentName(favoritePackage,favoriteClass);

intent.setComponent(cn);intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

info = getApplicationInfo(packageManager, intent);if (info != null) {

info.intent = intent;mFavorites.addFirst(info);

}

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}} catch (XmlPullParserException e) {

Log.w(LOG_TAG, "Got exception parsing favorites.", e);} catch (IOException e) {

Log.w(LOG_TAG, "Got exception parsing favorites.", e);}

}

mApplicationsStack.setFavorites(mFavorites);}

private static void beginDocument(XmlPullParser parser, StringfirstElementName)

throws XmlPullParserException, IOException {

int type;while ((type = parser.next()) != XmlPullParser.START_TAG &&

type != XmlPullParser.END_DOCUMENT) {// Empty

}

if (type != XmlPullParser.START_TAG) {throw new XmlPullParserException("No start tag found");

}

if (!parser.getName().equals(firstElementName)) {throw new XmlPullParserException("Unexpected start tag: found " +

parser.getName() +", expected " + firstElementName);

}}

private static void nextElement(XmlPullParser parser) throwsXmlPullParserException, IOException {

int type;while ((type = parser.next()) != XmlPullParser.START_TAG &&

type != XmlPullParser.END_DOCUMENT) {// Empty

}}

/*** Refreshes the recently launched applications stacked over the favorites. The

number* of recents depends on how many favorites are present.

*/private void bindRecents() {

final PackageManager manager = getPackageManager();final ActivityManager tasksManager = (ActivityManager)

getSystemService(ACTIVITY_SERVICE);final List recentTasks =

tasksManager.getRecentTasks(MAX_RECENT_TASKS, 0);

final int count = recentTasks.size();final ArrayList recents = new

ArrayList();

for (int i = count - 1; i >= 0; i--) {final Intent intent = recentTasks.get(i).baseIntent;

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if (Intent.ACTION_MAIN.equals(intent.getAction()) &&!intent.hasCategory(Intent.CATEGORY_HOME)) {

ApplicationInfo info = getApplicationInfo(manager, intent);if (info != null) {

info.intent = intent;

if (!mFavorites.contains(info)) {recents.add(info);

}}

}}

mApplicationsStack.setRecents(recents);}

private static ApplicationInfo getApplicationInfo(PackageManager manager,Intent intent) {

final ResolveInfo resolveInfo = manager.resolveActivity(intent, 0);

if (resolveInfo == null) {return null;

}

final ApplicationInfo info = new ApplicationInfo();final ActivityInfo activityInfo = resolveInfo.activityInfo;info.icon = activityInfo.loadIcon(manager);if (info.title == null || info.title.length() == 0) {

info.title = activityInfo.loadLabel(manager);}if (info.title == null) {

info.title = "";

}return info;

}

@Overridepublic void onWindowFocusChanged(boolean hasFocus) {

super.onWindowFocusChanged(hasFocus);if (!hasFocus) {

mBackDown = mHomeDown = false;}

}

@Override

public boolean dispatchKeyEvent(KeyEvent event) {if (event.getAction() == KeyEvent.ACTION_DOWN) {

switch (event.getKeyCode()) {case KeyEvent.KEYCODE_BACK:

mBackDown = true;return true;

case KeyEvent.KEYCODE_HOME:mHomeDown = true;return true;

}} else if (event.getAction() == KeyEvent.ACTION_UP) {

switch (event.getKeyCode()) {case KeyEvent.KEYCODE_BACK:

if (!event.isCanceled()) {// Do BACK behavior.

}

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mBackDown = true;return true;

case KeyEvent.KEYCODE_HOME:if (!event.isCanceled()) {

// Do HOME behavior.}

mHomeDown = true;return true;

}}

return super.dispatchKeyEvent(event);}

@Overridepublic boolean onCreateOptionsMenu(Menu menu) {

super.onCreateOptionsMenu(menu);

menu.add(0, MENU_WALLPAPER_SETTINGS, 0, R.string.menu_wallpaper)

.setIcon(android.R.drawable.ic_menu_gallery)

.setAlphabeticShortcut('W');menu.add(0, MENU_SEARCH, 0, R.string.menu_search)

.setIcon(android.R.drawable.ic_search_category_default)

.setAlphabeticShortcut(SearchManager.MENU_KEY);menu.add(0, MENU_SETTINGS, 0, R.string.menu_settings)

.setIcon(android.R.drawable.ic_menu_preferences)

.setIntent(new Intent(android.provider.Settings.ACTION_SETTINGS));

return true;}

@Override

public boolean onOptionsItemSelected(MenuItem item) {switch (item.getItemId()) {

case MENU_WALLPAPER_SETTINGS:startWallpaper();return true;

case MENU_SEARCH:onSearchRequested();return true;

}

return super.onOptionsItemSelected(item);}

private void startWallpaper() {final Intent pickWallpaper = new Intent(Intent.ACTION_SET_WALLPAPER);startActivity(Intent.createChooser(pickWallpaper,

getString(R.string.menu_wallpaper)));}

/*** Loads the list of installed applications in mApplications.*/private void loadApplications(boolean isLaunching) {

if (isLaunching && mApplications != null) {return;

}

PackageManager manager = getPackageManager();

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Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);

final List apps = manager.queryIntentActivities(mainIntent,0);

Collections.sort(apps, new ResolveInfo.DisplayNameComparator(manager));

if (apps != null) {final int count = apps.size();

if (mApplications == null) {mApplications = new ArrayList(count);

}mApplications.clear();

for (int i = 0; i < count; i++) {ApplicationInfo application = new ApplicationInfo();ResolveInfo info = apps.get(i);

application.title = info.loadLabel(manager);application.setActivity(new ComponentName(

info.activityInfo.applicationInfo.packageName,info.activityInfo.name),Intent.FLAG_ACTIVITY_NEW_TASK| Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);

application.icon = info.activityInfo.loadIcon(manager);

mApplications.add(application);}

}}

/*** Shows all of the applications by playing an animation on the grid.*/private void showApplications(boolean animate) {

if (mBlockAnimation) {return;

}mBlockAnimation = true;

mShowApplicationsCheck.toggle();

if (mShowLayoutAnimation == null) {mShowLayoutAnimation = AnimationUtils.loadLayoutAnimation(

this, R.anim.show_applications);}

// This enables a layout animation; if you uncomment this code, you need to// comment the line mGrid.startAnimation() below

// mGrid.setLayoutAnimationListener(new ShowGrid());// mGrid.setLayoutAnimation(mShowLayoutAnimation);// mGrid.startLayoutAnimation();

if (animate) {mGridEntry.setAnimationListener(new ShowGrid());mGrid.startAnimation(mGridEntry);

}

mGrid.setVisibility(View.VISIBLE);

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if (!animate) {mBlockAnimation = false;

}

// ViewDebug.startHierarchyTracing("Home", mGrid);}

/*** Hides all of the applications by playing an animation on the grid.*/private void hideApplications() {

if (mBlockAnimation) {return;

}mBlockAnimation = true;

mShowApplicationsCheck.toggle();

if (mHideLayoutAnimation == null) {

mHideLayoutAnimation = AnimationUtils.loadLayoutAnimation(this, R.anim.hide_applications);

}

mGridExit.setAnimationListener(new HideGrid());mGrid.startAnimation(mGridExit);mGrid.setVisibility(View.INVISIBLE);mShowApplications.requestFocus();

// This enables a layout animation; if you uncomment this code, you need to// comment the line mGrid.startAnimation() above

// mGrid.setLayoutAnimationListener(new HideGrid());// mGrid.setLayoutAnimation(mHideLayoutAnimation);

// mGrid.startLayoutAnimation();}

/*** Receives intents from other applications to change the wallpaper.*/private class WallpaperIntentReceiver extends BroadcastReceiver {

@Overridepublic void onReceive(Context context, Intent intent) {

getWindow().setBackgroundDrawable(new ClippedDrawable(getWallpaper()));}

}

/*** Receives notifications when applications are added/removed.*/private class ApplicationsIntentReceiver extends BroadcastReceiver {

@Overridepublic void onReceive(Context context, Intent intent) {

loadApplications(false);bindApplications();bindRecents();bindFavorites(false);

}}

/*** GridView adapter to show the list of all installed applications.*/

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private class ApplicationsAdapter extends ArrayAdapter {private Rect mOldBounds = new Rect();

public ApplicationsAdapter(Context context, ArrayListapps) {

super(context, 0, apps);

}

@Overridepublic View getView(int position, View convertView, ViewGroup parent) {

final ApplicationInfo info = mApplications.get(position);

if (convertView == null) {final LayoutInflater inflater = getLayoutInflater();convertView = inflater.inflate(R.layout.application, parent,

false);}

Drawable icon = info.icon;

if (!info.filtered) {//final Resources resources = getContext().getResources();int width = 42;//(int)

resources.getDimension(android.R.dimen.app_icon_size);int height = 42;//(int)

resources.getDimension(android.R.dimen.app_icon_size);

final int iconWidth = icon.getIntrinsicWidth();final int iconHeight = icon.getIntrinsicHeight();

if (icon instanceof PaintDrawable) {PaintDrawable painter = (PaintDrawable) icon;

painter.setIntrinsicWidth(width);painter.setIntrinsicHeight(height);

}

if (width > 0 && height > 0 && (width < iconWidth || height iconHeight) {height = (int) (width / ratio);

} else if (iconHeight > iconWidth) {width = (int) (height * ratio);

}

final Bitmap.Config c =icon.getOpacity() != PixelFormat.OPAQUE ?

Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;final Bitmap thumb = Bitmap.createBitmap(width, height, c);final Canvas canvas = new Canvas(thumb);canvas.setDrawFilter(new

PaintFlagsDrawFilter(Paint.DITHER_FLAG, 0));// Copy the old bounds to restore them later// If we were to do oldBounds = icon.getBounds(),// the call to setBounds() that follows would// change the same instance and we would lose the// old bounds

mOldBounds.set(icon.getBounds());icon.setBounds(0, 0, width, height);icon.draw(canvas);

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icon.setBounds(mOldBounds);icon = info.icon = new BitmapDrawable(thumb);info.filtered = true;

}}

final TextView textView = (TextView)convertView.findViewById(R.id.label);

textView.setCompoundDrawablesWithIntrinsicBounds(null, icon, null,null);

textView.setText(info.title);

return convertView;}

}

/*** Shows and hides the applications grid view.*/

private class ShowApplications implements View.OnClickListener {public void onClick(View v) {

if (mGrid.getVisibility() != View.VISIBLE) {showApplications(true);

} else {hideApplications();

}}

}

/*** Hides the applications grid when the layout animation is over.*/

private class HideGrid implements Animation.AnimationListener {public void onAnimationStart(Animation animation) {}

public void onAnimationEnd(Animation animation) {mBlockAnimation = false;

}

public void onAnimationRepeat(Animation animation) {}

}

/**

* Shows the applications grid when the layout animation is over.*/private class ShowGrid implements Animation.AnimationListener {

public void onAnimationStart(Animation animation) {}

public void onAnimationEnd(Animation animation) {mBlockAnimation = false;// ViewDebug.stopHierarchyTracing();

}

public void onAnimationRepeat(Animation animation) {}

}

/**

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* Starts the selected activity/application in the grid view.*/private class ApplicationLauncher implements AdapterView.OnItemClickListener {

public void onItemClick(AdapterView parent, View v, int position, long id){

ApplicationInfo app = (ApplicationInfo)

parent.getItemAtPosition(position);startActivity(app.intent);

}}

/*** When a drawable is attached to a View, the View gives the Drawable its

dimensions* by calling Drawable.setBounds(). In this application, the View that draws

the* wallpaper has the same size as the screen. However, the wallpaper might be

larger* that the screen which means it will be automatically stretched. Because

stretching* a bitmap while drawing it is very expensive, we use a ClippedDrawable

instead.* This drawable simply draws another wallpaper but makes sure it is not

stretched* by always giving it its intrinsic dimensions. If the wallpaper is larger

than the* screen, it will simply get clipped but it won't impact performance.*/private class ClippedDrawable extends Drawable {

private final Drawable mWallpaper;

public ClippedDrawable(Drawable wallpaper) {

mWallpaper = wallpaper;}

@Overridepublic void setBounds(int left, int top, int right, int bottom) {

super.setBounds(left, top, right, bottom);// Ensure the wallpaper is as large as it really is, to avoid

stretching it// at drawing timemWallpaper.setBounds(left, top, left + mWallpaper.getIntrinsicWidth(),

top + mWallpaper.getIntrinsicHeight());}

public void draw(Canvas canvas) {mWallpaper.draw(canvas);

}

public void setAlpha(int alpha) {mWallpaper.setAlpha(alpha);

}

public void setColorFilter(ColorFilter cf) {mWallpaper.setColorFilter(cf);

}

public int getOpacity() {

return mWallpaper.getOpacity();}

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}}

Wallpaper.java

Wallpaper.java


/** Copyright (C) 2006 The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at

** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/


import android.app.Activity;

import android.content.Context;import android.os.Bundle;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;import android.widget.Gallery.LayoutParams;

import java.io.IOException;import java.io.InputStream;

/*** Wallpaper picker for the Home application. User can choose from* a gallery of stock photos.*/

public class Wallpaper extends Activity implementsAdapterView.OnItemSelectedListener, AdapterView.OnItemClickListener {

private static final String LOG_TAG = "Home";

private static final Integer[] THUMB_IDS = {

R.drawable.bg_android_icon,R.drawable.bg_sunrise_icon,R.drawable.bg_sunset_icon,

};
http://developer.android.com/resources/samples/Home/src/com/example/android/home/Wallpaper.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/Wallpaper.htmlhttp://developer.android.com/resources/samples/Home/src/com/example/android/home/Wallpaper.html

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private static final Integer[] IMAGE_IDS = {R.drawable.bg_android,R.drawable.bg_sunrise,R.drawable.bg_sunset,

};

private Gallery mGallery;private boolean mIsWallpaperSet;

@Overridepublic void onCreate(Bundle icicle) {

super.onCreate(icicle);requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.wallpaper);

mGallery = (Gallery) findViewById(R.id.gallery);mGallery.setAdapter(new ImageAdapter(this));

mGallery.setOnItemSelectedListener(this);mGallery.setOnItemClickListener(this);

}

@Overrideprotected void onResume() {

super.onResume();mIsWallpaperSet = false;

}

public void onItemSelected(AdapterView parent, View v, int position, long id) {getWindow().setBackgroundDrawableResource(IMAGE_IDS[position]);

}

public void onItemClick(AdapterView parent, View v, int position, long id) {selectWallpaper(position);

}

/** When using touch if you tap an image it triggers both the onItemClick and* the onTouchEvent causing the wallpaper to be set twice. Synchronize this* method and ensure we only set the wallpaper once.*/

private synchronized void selectWallpaper(int position) {if (mIsWallpaperSet) {

return;

}mIsWallpaperSet = true;try {

InputStream stream = getResources().openRawResource(IMAGE_IDS[position]);setWallpaper(stream);setResult(RESULT_OK);finish();

} catch (IOException e) {Log.e(LOG_TAG, "Failed to set wallpaper " + e);

}}

public void onNothingSelected(AdapterView parent) {

}

@Override

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public boolean onTouchEvent(MotionEvent event) {selectWallpaper(mGallery.getSelectedItemPosition());return true;

}

public class ImageAdapter extends BaseAdapter {

private Context mContext;

public ImageAdapter(Context c) {mContext = c;

}

public int getCount() {return THUMB_IDS.length;

}

public Object getItem(int position) {return position;

}

public long getItemId(int position) {return position;

}

public View getView(final int position, View convertView, ViewGroup parent) {ImageView i = new ImageView(mContext);

i.setImageResource(THUMB_IDS[position]);i.setAdjustViewBounds(true);i.setLayoutParams(new Gallery.LayoutParams(

LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

i.setBackgroundResource(android.R.drawable.picture_frame);return i;

}

}

}

AndroidManifest.xml


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** distributed under the License is distributed on an "AS IS" BASIS,** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.** See the License for the specific language governing permissions and** limitations under the License.*/-->

Files

AndroidManifest.xml
http://developer.android.com/resources/samples/Home/AndroidManifest.htmlhttp://developer.android.com/resources/samples/Home/AndroidManifest.htmlhttp://developer.android.com/resources/samples/Home/AndroidManifest.html

Documents

Home - Home