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我有一个显示的 AlertDialog，并希望文本有倒计时。在尝试以下列方式实现它时，对话框完全根据需要显示，但我试图弄清楚如何在显示对话框时使其中一个 TextViews 更改为计时器。当我尝试以这种方式实现它时，它会崩溃，正如您在日志信息中看到的那样。

public void startOverlay()
    {

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setCancelable(false);
        // Get the layout inflater
        LayoutInflater inflater = getLayoutInflater();
        View boxLayout = inflater.inflate(R.layout.overlay, null);

        builder.setView(boxLayout);

        Typeface flatui = Typeface.createFromAsset(getAssets(), "fonts/Flat-UI-Font.ttf");
        TextView t1 = (TextView)boxLayout.findViewById(R.id.dialogtext1);
        final TextView t2 = (TextView)boxLayout.findViewById(R.id.dialogtext2);
        t1.setTypeface(flatui);
        t2.setTypeface(flatui);

        final AlertDialog receivedBox = builder.create();
        receivedBox.show();

        CountDownTimer timer = new CountDownTimer(6000, 1000) {

            public void onTick(long millisUntilFinished) {
                final int seconds = (int) (millisUntilFinished / 1000);
                log("Tick: " + seconds);
                if (seconds == 0)
                    receivedBox.dismiss();

                Handler mHandler = new Handler();
                mHandler.post(new Runnable() {
                     @Override
                     public void run() {

                         // executed on the UI thread
                        t2.setText(seconds);
                     }
                });

            }

            public void onFinish() {
                receivedBox.dismiss();
                log("done!");
                beginFirst();
            }
         }.start();

    }

日志信息：

06-24 12:01:18.977: E/AndroidRuntime(11682): FATAL EXCEPTION: main
06-24 12:01:18.977: E/AndroidRuntime(11682): android.content.res.Resources$NotFoundException: String resource ID #0x5
06-24 12:01:18.977: E/AndroidRuntime(11682):    at android.content.res.Resources.getText(Resources.java:242)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at android.widget.TextView.setText(TextView.java:3773)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at com.workout.MainActivity$1$1.run(MainActivity.java:163)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at android.os.Handler.handleCallback(Handler.java:615)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at android.os.Handler.dispatchMessage(Handler.java:92)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at android.os.Looper.loop(Looper.java:137)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at android.app.ActivityThread.main(ActivityThread.java:4918)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at java.lang.reflect.Method.invokeNative(Native Method)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at java.lang.reflect.Method.invoke(Method.java:511)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
06-24 12:01:18.977: E/AndroidRuntime(11682):    at dalvik.system.NativeStart.main(Native Method)
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1 回答 1

1

您不能在 UI 线程之外更改或修改您的视图。尝试以下代码来更新您的 TextView。将此代码放入onTick.

private Handler mHandler = new Handler();
mHandler.post(new Runnable() {
     @Override
     public void run() {
         // executed on the UI thread
         your_text_view.setText("your string");
     }
});
于 2013-06-24T05:23:59.137 回答