Android_Home.rar_Home Home

/* * 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.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"; /** * 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 items private 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<ApplicationInfo> mApplications; private static LinkedList<ApplicationInfo> mFavorites; private final BroadcastReceiver mWallpaperReceiver = new WallpaperIntentReceiver(); private final BroadcastReceiver mApplicationsReceiver = new ApplicationsIntentReceiver(); 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; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setDefaultKeyMode(DEFAULT_KEYS_SEARCH_LOCAL); setContentView(R.layout.home); registerIntentReceivers(); setDefaultWallpaper(); loadApplications(true); bindApplications(); bindFavorites(true); bindRecents(); bindButtons(); mGridEntry = AnimationUtils.loadAnimation(this, R.anim.grid_entry); mGridExit = AnimationUtils.loadAnimation(this, R.anim.grid_exit); } @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); // Close the menu if (Intent.ACTION_MAIN.equals(intent.getAction())) { getWindow().closeAllPanels(); } } @Override public void onDestroy() { super.onDestroy(); // Remove the callback for the cached drawables or we leak // the previous Home screen on orientation change final int count = mApplications.size(); for (int i = 0; i < count; i++) { mApplications.get(i).icon.setCallback(null); } unregisterReceiver(mWallpaperReceiver); unregisterReceiver(mApplicationsReceiver); } @Override protected void onResume() { super.onResume(); bindRecents(); } @Override protected void onRestoreInstanceState(Bundle state) { super.onRestoreInstanceState(state); final boolean opened = state.getBoolean(KEY_SAVE_GRID_OPENED, false); if (opened) { showApplications(false); } } @Override protected 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 * 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 Clipp