Launcher 在配置文件中配置桌面快捷方式->代码分析

最新推荐文章于 2020-12-22 08:06:52 发布

原创最新推荐文章于 2020-12-22 08:06:52 发布 · 801 阅读

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在res/xml文件夹下面default_workspace创建一个资源文件，格式如下：

<?xml version="1.0" encoding="utf-8"?>
<favorites xmlns:launcher="http://schemas.android.com/apk/res/com.android.launcher">
    <favorite
        launcher:packageName="tv.tur"
        launcher:className="tv.tur.HomeActivity"
        launcher:screen="3"
        launcher:x="0"
        launcher:y="0" />
</favorites>

在launcher中的LauncherProvider的DatabaseHelper数据库类中的onCreate方法中进行初始化

代码如下：

            if (!convertDatabase(db)) {
                // Populate favorites table with initial favorites
                switch (best_versions) {
				case 0:
					loadFavorites(db, R.xml.default_workspace);
					
					break;
				case 1:
					loadFavorites(db, R.xml.default_workspace_version_one);
					break;
				default:
					break;
				}
            }

在该loadFavorites中进行初始化:

private int loadFavorites(SQLiteDatabase db, int workspaceResourceId) {
            Intent intent = new Intent(Intent.ACTION_MAIN, null);
            intent.addCategory(Intent.CATEGORY_LAUNCHER);
            ---------------
            ...
            ---------------
            //对应的是几个favorite的值
            TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.Favorite);
            ....
            String screen = a.getString(R.styleable.Favorite_screen);
            String x = a.getString(R.styleable.Favorite_x);
            String y = a.getString(R.styleable.Favorite_y); 
            ....
            values.clear();
            values.put(LauncherSettings.Favorites.CONTAINER, container);
            values.put(LauncherSettings.Favorites.SCREEN, screen);
            values.put(LauncherSettings.Favorites.CELLX, x);
            values.put(LauncherSettings.Favorites.CELLY, y);
            ....
            if (TAG_FAVORITE.equals(name)) {
                 long id = addAppShortcut(db, values, a, packageManager, intent);
                  added = id >= 0;
             } else if (TAG_SEARCH.equals(name)) {
                   added = addSearchWidget(db, values);
             } else if (TAG_CLOCK.equals(name)) {
            ....
}

在addAppShortcut里面进行添加快捷方式的信息到数据库如下:

private long addAppShortcut(SQLiteDatabase db, ContentValues values, TypedArray a,
        PackageManager packageManager, Intent intent) {
    long id = -1;
    ActivityInfo info;
    String packageName = a.getString(R.styleable.Favorite_packageName);
    String className = a.getString(R.styleable.Favorite_className);
    try {
        ComponentName cn;
        try {
            cn = new ComponentName(packageName, className);
            info = packageManager.getActivityInfo(cn, 0);
        } catch (PackageManager.NameNotFoundException nnfe) {
            String[] packages = packageManager.currentToCanonicalPackageNames(
                new String[] { packageName });
            cn = new ComponentName(packages[0], className);
            info = packageManager.getActivityInfo(cn, 0);
        }
        id = generateNewId();
        intent.setComponent(cn);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
                Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
        values.put(Favorites.INTENT, intent.toUri(0));
        values.put(Favorites.TITLE, info.loadLabel(packageManager).toString());
        values.put(Favorites.ITEM_TYPE, Favorites.ITEM_TYPE_APPLICATION);
        values.put(Favorites.SPANX, 1);
        values.put(Favorites.SPANY, 1);
        values.put(Favorites._ID, generateNewId());
        if (dbInsertAndCheck(this, db, TABLE_FAVORITES, null, values) < 0) {
            return -1;
        }
    } catch (PackageManager.NameNotFoundException e) {
        Log.w(TAG, "Unable to add favorite: " + packageName +
                "/" + className, e);
    }
    return id;
}