廣播監聽手機中應用程式是否安裝並卸載，監聽應用程式

廣播監聽手機中應用程式是否安裝並卸載，監聽應用程式
public class PackageReceiver extends BroadcastReceiver {

private static final int PACKAGE_NAME_INDEX = 8;

@Override
public void onReceive(Context context, Intent intent) {
if (intent != null) {
/**安裝程式的ACTION為Intent.ACTION_PACKAGE_ADDED*/
if (intent.getAction().equals(Intent.ACTION_PACKAGE_ADDED)) {
String data = intent.getDataString();
if (data == null || data.length() <= PACKAGE_NAME_INDEX) { return; }
String packageName = data.substring(PACKAGE_NAME_INDEX);
if (isAvilible(context, packageName)) {
/**說明安裝了應用程式套件*/
Uri uri = Uri.fromParts("package", packageName, null);
/**監聽應用卸載的ACTION*/
intent = new Intent(Intent.ACTION_DELETE, uri);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
else {
Toast.makeText(context, "手機並沒有安裝該應用！", Toast.LENGTH_SHORT).show();
}
}
}
}

/**檢測是否安裝了的用戶端*/
public static boolean isAvilible(Context context, String packageName) {
/**包管理器PackageManager*/
final PackageManager packageManager = context.getPackageManager();
/**所有已安裝程式的包資訊*/
List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
/**儲存所有已安裝程式的包名*/
List<String> pName = new ArrayList<String>();
if (pinfo != null) {
for (int i = 0; i < pinfo.size(); i++) {
String pn = pinfo.get(i).packageName;
pName.add(pn);
}
}
return pName.contains(packageName);
}

}

-----------AndroidManifest.xml中註冊廣播---------------------------

 <receiver android:name=".PackageReceiver">
           <intent-filter>
              <action android:name="android.intent.action.PACKAGE_ADDED" />
              <data android:scheme="package" />
              </intent-filter>
        </receiver>