Question

我正在尝试在收到的广播上增加我的进度条，但myProgressDialog.incrementProgressBy(increment);代码从我的角度来看没有效果。我试过把命令放在不同的地方，但我仍然看不到任何效果。

以下是我的代码。

public static final int max = 180;
public final static int increment = (1/180);

  @Override
   public void onCreate(Bundle savedInstanceState) {
            ...
        i = new Intent();
    i.setAction(ITEM_CREATED);
    registerReceiver(myBroadcastReceiver, new IntentFilter(ITEM_CREATED));              
        findFeeds = new Runnable(){
           @Override
           public void run() 
            {
              getFeedObjects();
            }
           };
           beginThread();
        } 

 public static Context getAppContext() {
    return context;
}

private void beginThread()
{
    switch (checkConnectionState(OffsideLiteActivity.this))
    {
        case 0:
        thread =  new Thread(null, findItems, "DoingInBackground");
        thread.start();
        myProgressDialog = new ProgressDialog(this);
            myProgressDialog.setCancelable(true);
            myProgressDialog.setMessage("Loading...");
            myProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            myProgressDialog.setProgress(0);
            myProgressDialog.setMax(max);
            myProgressDialog.show();

        break;
        case 1:
        connectionError();
        break;
        default:
    }
}

     private BroadcastReceiver myBroadcastReceiver =
    new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) 
        {
            myProgressDialog.incrementProgressBy(increment);
            Log.d("RECEIVED", "Broadcast received");
        }

   };

有趣的是，logcat注册了Broadcast received代码之后放置的myProgressDialog.incrementProgressBy(increment);日志

logcat

08-03 13:56:15.109: DEBUG/RECEIVED(8666): Broadcast received
08-03 13:56:15.109: DEBUG/RECEIVED(8666): Broadcast received
08-03 13:56:15.109: DEBUG/RECEIVED(8666): Broadcast received
08-03 13:56:15.109: DEBUG/RECEIVED(8666): Broadcast received
08-03 13:56:15.109: DEBUG/RECEIVED(8666): Broadcast received

就像我说的，我已经尝试将myProgressDialog.incrementProgressBy(increment);命令放在我的代码中的其他地方，但无济于事。有什么建议吗？

Answer 1

问题可能就在这一行：

public final static int increment = (1/180);

我相信int会被截断为0，所以你只需要将进度对话框递增0.你可能希望增量为1。

Answer 2

不是使用广播接收器来更新你的UI，你不能只使用类似于观察可观察模式的东西，然后监听器会在UI线程中运行UI更新，如下所示：

public void updateUIRequested( int increment )
{
   runOnUIThread( new Runnable() { myProgressDialog.incrementProgressBy(increment); } );
}//met

或者如果你想要更现代的东西，使用AsyncTask并仍然在UI线程中运行更新。

此致斯特凡

Answer 3

尝试将调试点放在myProgressDialog.incrementProgressBy（）....增量的值是多少？我的猜测是它可能是0.或者将你的日志改为：

Log.d("RECEIVED", "Broadcast received, increment by " + increment);

为什么我的进度条不能正常增加？

3 个答案: