android 设置应用程序默认值

Android中有时打开一个文件,系统会弹出一个应用程序选择列表供你选择.如果你把某个应用程序设为默认值,则不会弹出选择框,而会直接调用该程序.

设置方法如下:

    PackageManager pm = getPackageManager();

    IntentFilter filter = new IntentFilter();

    filter.addCategory("android.intent.category.DEFAULT");

    ComponentName component = new ComponentName("YourClearAppPakageName", "YourClearAppClassName");

    ComponentName[] components = new ComponentName[] {new ComponentName("YourPreferAppPakageName", "YourPreferAppClassName"), component};

    pm.clearPackagePreferredActivities("YourClearAppPakageName");

    pm.addPreferredActivity(filter, IntentFilter.MATCH_CATEGORY_EMPTY, components, component);

notes: android version must be lower than 2.2, otherwise ):