android-onKeyDown() 不能在繼承類上運行

onKeyDown() 不能在繼承類上運行

我創建了一個自定義 GalleryView，在 Samsung Galaxy S III 或者 Nexus 4 上都可以執行。當我在模擬器中運行的時候，出現下面的錯誤:

02-24 01:01:03.593: E/AndroidRuntime(3429): FATAL EXCEPTION: Thread-11
02-24 01:01:03.593: E/AndroidRuntime(3429): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
02-24 01:01:03.593: E/AndroidRuntime(3429):     at android.view.ViewRoot.checkThread(ViewRoot.java:2802)
02-24 01:01:03.593: E/AndroidRuntime(3429):     at android.view.ViewRoot.playSoundEffect(ViewRoot.java:2581)
02-24 01:01:03.593: E/AndroidRuntime(3429):     at android.view.View.playSoundEffect(View.java:8516)
02-24 01:01:03.593: E/AndroidRuntime(3429):     at android.widget.Gallery.onKeyDown(Gallery.java:1109)
02-24 01:01:03.593: E/AndroidRuntime(3429):     at com.example.coverflow.ui.galleryView$1.run(galleryView.java:55)
02-24 01:01:03.593: E/AndroidRuntime(3429):     at java.lang.Thread.run(Thread.java:1096)

這些錯誤涉及到下面的代碼:

public void startSlideShow(final int periodTime)
{
    final Runnable __runnable = new Runnable()
    {
        @Override
        public void run() 
        {
            if (!isTouched) 
                galleryView.this.onKeyDown(KeyEvent.KEYCODE_DPAD_RIGHT, null);
            mHandler.postDelayed(this, periodTime);              
        }
    };
    new Thread(__runnable).start();

    this.setOnTouchListener(new View.OnTouchListener()
    {
        @Override
        public boolean onTouch(View view, MotionEvent event) 
        {
            int currentEvent = event.getAction();
            if (currentEvent == MotionEvent.ACTION_DOWN 
                    || currentEvent == MotionEvent.ACTION_MOVE)
                isTouched = true;
            else
            {
                isTouched = false;
                // Reset handler
                mHandler.removeCallbacks(__runnable);
                mHandler.postDelayed(__runnable, periodTime);
            }
            return false;
        }
    });
}

如何處理這個問題？

Line 55 是galleryView.this.onKeyDown(KeyEvent.KEYCODE_DPAD_RIGHT, null);

最佳回答：

 galleryView.this.onKeyDown(KeyEvent.KEYCODE_DPAD_RIGHT, null);

你這一句是在你自己new的thread裡面執行的。所以會報錯。
用

mHandler.post(__runnable);
new Thread(__runnable).start();

這個不需要