android - 通知で進行状況を表示する Android

Question

ここに私のコードがあります:

public class MainActivity extends Activity {

private NotificationManager mNotifyManager;
private NotificationCompat.Builder mBuilder;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mNotifyManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    mBuilder = new NotificationCompat.Builder(this);
}


public void click(View view) {
    noti();
}


private void noti() {
    mBuilder.setContentTitle("Picture Download")
        .setContentText("Download in progress")
        .setSmallIcon(R.drawable.ic_launcher);
    // Start a lengthy operation in a background thread
    new Thread(
        new Runnable() {
            @Override
            public void run() {
                int incr;
                // Do the "lengthy" operation 20 times
                for (incr = 0; incr <= 100; incr+=5) {
                        // Sets the progress indicator to a max value, the
                        // current completion percentage, and "determinate"
                        // state
                        mBuilder.setProgress(100, incr, false);
                        // Displays the progress bar for the first time.
                        mNotifyManager.notify(0, mBuilder.build());
                            // Sleeps the thread, simulating an operation
                            // that takes time
                            try {
                                // Sleep for 5 seconds
                                Thread.sleep(1*1000);
                            } catch (InterruptedException e) {
                                e.printStackTrace();
                            }
                }
                // When the loop is finished, updates the notification
                mBuilder.setContentText("Download complete")
                // Removes the progress bar
                        .setProgress(0,0,false);
                mNotifyManager.notify(0, mBuilder.build());
            }
        }
    // Starts the thread by calling the run() method in its Runnable
    ).start();
}

}

Android 4.2.2 デバイスでは正常に動作しますが、Android 2.2 デバイスで実行しようとすると、通知が表示されず、次のログが表示されました。

RuntimeException  in notify -
java.lang.Throwable: stack dump
at android.app.NotificationManager.notify(NotificationManager.java:118)
at android.app.NotificationManager.notify(NotificationManager.java:92)
at com.gyh.notitest.MainActivity$1.run(MainActivity.java:49)
at java.lang.Thread.run(Thread.java:1019)

誰でも私を助けることができますか？カスタムレイアウトなしでAndroid 2.2デバイスの通知にプログレスバーを表示するにはどうすればよいですか?

ありがとう！