android快捷方式,访问启动器db

Question

我想从启动器db获取数据.

final String AUTHORITY = "com.android.launcher2.settings";  
final Uri CONTENT_URI = Uri.parse("content://" + 
                        AUTHORITY + "/favorites?notify=true");

Cursor c = contentResolver.query(uri, columns, null, null,
            null);

和

<uses-permission 
        android:name="com.android.launcher.permission.INSTALL_SHORTCUT"/>
<uses-permission 
        android:name="com.android.launcher.permission.UNINSTALL_SHORTCUT"/>
<uses-permission 
        android:name="com.android.launcher.permission.READ_SETTINGS" />
<uses-permission 
        android:name="com.android.launcher.permission.WRITE_SETTINGS" />

但据说在logcat中:

Failed to find provider info for com.android.launcher2.settings

Answer 1

启动器是手机制造商责任下的应用程序.然后,管理局并非总是如此"com.android.launcher2.settings".手机制造商可能会重写自己的手机."com.android.twlauncher"根据Java包,它可以是或其他任何东西.

你需要通过搜索声明读/写权限的供应商检索有权机关"com.android.launcher.permission.READ_SETTINGS"或"com.android.launcher.permission.WRITE_SETTINGS".

这是一个示例代码:

static String getAuthorityFromPermission(Context context, String permission){
    if (permission == null) return null;
    List<PackageInfo> packs = context.getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS);
    if (packs != null) {
        for (PackageInfo pack : packs) { 
            ProviderInfo[] providers = pack.providers; 
            if (providers != null) { 
                for (ProviderInfo provider : providers) { 
                    if (permission.equals(provider.readPermission)) return provider.authority;
                    if (permission.equals(provider.writePermission)) return provider.authority;
                } 
            }
        }
    }
    return null;
}

通常,ContentProvider保留了DB结构,您可以使用相同的查询.