android - 单独线程中的 ProgressDialog 给出 **未捕获的远程异常!**

Question

我在新线程中实现了 ProgressDialog。

onCreate 中的代码

progressDialog = new ProgressDialog(this);
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.setMessage("Verifying...");
progressDialog.setCancelable(true);
progressDialog.show();

t.start();

线程声明

Runnable r = new MyRunnable();
Thread t = new Thread(r);

可运行

public class MyRunnable implements Runnable {

        @Override
        public void run() {
            Message msg = Message.obtain();
            if (t.isInterrupted()) {
                msg.recycle();
                return;
            }

            long startTime = SystemClock.elapsedRealtime();
            long duration = 5 * 60 * 1000; // 5 min
            long percentageIntervalDuration = 2;
            long interval = (duration * percentageIntervalDuration) / 100; // 6sec
            int i = 0;
            do {
                if (SystemClock.elapsedRealtime() == (startTime + (i * interval))) {
                    msg.arg1 = (int) percentageIntervalDuration * i;
                    mainHandler.sendMessage(msg);
                    i++;

                }
            } while (i != (100 / percentageIntervalDuration) + 1);
        }
    }

附加到主线程的处理程序

Handler mainHandler = new Handler() {
public void handleMessage(Message msg) {
Log.d(TAG, String.valueOf(msg.arg1));
if (msg.arg1 == 100) {
        progressDialog.dismiss();
        } else {
            progressDialog.setProgress(msg.arg1);
               }
        }
    };

现在我面临两个问题

<强>1。当关闭 ProgressDialog 时，Logcat 中会出现以下错误消息

05-09 17:57:36.386: E/JavaBinder(9822): *** Uncaught remote exception!  (Exceptions are not yet supported across processes.)
05-09 17:57:36.386: E/JavaBinder(9822): android.util.AndroidRuntimeException: { what=4 when=650507787 arg1=1 } This message is already in use.
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.MessageQueue.enqueueMessage(MessageQueue.java:171)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.Handler.sendMessageAtTime(Handler.java:457)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.Handler.sendMessageDelayed(Handler.java:430)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.Handler.sendMessage(Handler.java:367)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.view.inputmethod.InputMethodManager$1.setActive(InputMethodManager.java:428)
05-09 17:57:36.386: E/JavaBinder(9822):   at com.android.internal.view.IInputMethodClient$Stub.onTransact(IInputMethodClient.java:83)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.Binder.execTransact(Binder.java:288)
05-09 17:57:36.386: E/JavaBinder(9822):   at dalvik.system.NativeStart.run(Native Method)
05-09 17:57:36.386: E/JavaBinder(9822): *** Uncaught remote exception!  (Exceptions are not yet supported across processes.)
05-09 17:57:36.386: E/JavaBinder(9822): android.util.AndroidRuntimeException: { what=100 when=650507787 } This message is already in use.
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.MessageQueue.enqueueMessage(MessageQueue.java:171)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.Handler.sendMessageAtTime(Handler.java:457)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.Handler.sendMessageDelayed(Handler.java:430)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.Handler.sendMessage(Handler.java:367)
05-09 17:57:36.386: E/JavaBinder(9822):   at com.android.internal.view.IInputConnectionWrapper.dispatchMessage(IInputConnectionWrapper.java:182)
05-09 17:57:36.386: E/JavaBinder(9822):   at com.android.internal.view.IInputConnectionWrapper.reportFullscreenMode(IInputConnectionWrapper.java:159)
05-09 17:57:36.386: E/JavaBinder(9822):   at com.android.internal.view.IInputContext$Stub.onTransact(IInputContext.java:211)
05-09 17:57:36.386: E/JavaBinder(9822):   at android.os.Binder.execTransact(Binder.java:288)
05-09 17:57:36.386: E/JavaBinder(9822):   at dalvik.system.NativeStart.run(Native Method)

<强>2。 ProgressDialog 有时会卡住在特定的百分比。

Answer 1

从上一个问题来看，您可能每次都需要创建一个新的 Message 对象。 Android Handler Message and ListView

另外，这个讨论似乎指向 Message.clearForRecycle() 没有被调用？ http://code.google.com/p/android/issues/detail?id=3318

也就是说，为什么不使用 AsyncTask？它非常适合后台任务 + 发布到 UI 线程，并且与进度对话框配合得很好。它具有在主后台线程工作运行之前和之后执行代码的预构建方法，并且能够将进度更新发布到 UI，并为您很好地隐藏所有处理程序内容。

http://androidresearch.wordpress.com/2012/03/17/understanding-asynctask-once-and-forever/

http://www.android10.org/index.php/forums/43-view-layout-a-resource/908-tutorial-progressbar-running-in-asynctask

http://www.vogella.com/articles/AndroidPerformance/article.html#asynctask