1. 首頁
  2. 問答
  3. OnTouch偵聽器不工作在片段

OnTouch偵聽器不工作在片段

2013-11-25 180 views
1

我正在通過片段類實現OnTouch偵聽器。OnTouch偵聽器不工作在片段

public class ButtonFragment extends Fragment implements OnTouchListener

Overriden onTouch函數看起來像。

@Override 
    public boolean onTouch(View v, MotionEvent event) { 
     // TODO Auto-generated method stub 
     switch(v.getId()) 
     { 
     case R.id.buttonUp : 
     { 
      mAction = new Thread(){ 
       @Override 
       public void run() 
       { 

        try { 
         ChartJNI3D.cameraPos(1.0f, 'U'); 
         mAction.wait(); 

        } catch (InterruptedException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
        } 
       } 
      }; 
      if(event.getAction() == MotionEvent.ACTION_DOWN) 
       mAction.start(); 
      else if (event.getAction() == MotionEvent.ACTION_UP) 
       mAction.stop(); 
     } 
     break;

等等。 問題是隻需要一個OnClick事件並調用該函數。 但是，當它遇到MotionEvent.ACTION_UP應用程序與NULL指針異常崩潰。 可以發佈日誌，如果有人需要它。

01-08 17:59:10.771: E/AndroidRuntime(3926): FATAL EXCEPTION: Thread-344 
01-08 17:59:10.771: E/AndroidRuntime(3926): java.lang.IllegalMonitorStateException: object not locked by thread before wait() 
01-08 17:59:10.771: E/AndroidRuntime(3926):  at java.lang.Object.wait(Native Method) 
01-08 17:59:10.771: E/AndroidRuntime(3926):  at java.lang.Object.wait(Object.java:364) 
01-08 17:59:10.771: E/AndroidRuntime(3926):  at com.example.sample3dchart.ButtonFragment$1.run(ButtonFragment.java:53) 
01-08 17:59:10.816: E/InputEventReceiver(3926): Exception dispatching input event. 
01-08 17:59:10.816: E/MessageQueue-JNI(3926): Exception in MessageQueue callback: handleReceiveCallback 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): java.lang.UnsupportedOperationException 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at java.lang.Thread.stop(Thread.java:1076) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at java.lang.Thread.stop(Thread.java:1063) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at com.example.sample3dchart.ButtonFragment.onTouch(ButtonFragment.java:64) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.View.dispatchTouchEvent(View.java:7241) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1953) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1405) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.app.Activity.dispatchTouchEvent(Activity.java:2410) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1901) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.View.dispatchPointerEvent(View.java:7426) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3220) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3165) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4292) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4271) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4363) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:179) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.os.MessageQueue.nativePollOnce(Native Method) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.os.MessageQueue.next(MessageQueue.java:125) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.os.Looper.loop(Looper.java:124) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at android.app.ActivityThread.main(ActivityThread.java:5041) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at java.lang.reflect.Method.invokeNative(Native Method) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at java.lang.reflect.Method.invoke(Method.java:511) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
01-08 17:59:10.821: E/MessageQueue-JNI(3926): at dalvik.system.NativeStart.main(Native Method)

當代替

try { 
          ChartJNI3D.cameraPos(1.0f, 'U'); 
          mAction.wait(); 

         } catch (InterruptedException e) { 
          // TODO Auto-generated catch block 
          e.printStackTrace(); 
         }

我做

try { 
          ChartJNI3D.cameraPos(1.0f, 'U'); 
          mAction.sleep(100); 

         } catch (InterruptedException e) { 
          // TODO Auto-generated catch block 
          e.printStackTrace(); 
         }

日誌是

01-08 18:01:28.371: E/AndroidRuntime(4125): FATAL EXCEPTION: main 
01-08 18:01:28.371: E/AndroidRuntime(4125): java.lang.UnsupportedOperationException 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at java.lang.Thread.stop(Thread.java:1076) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at java.lang.Thread.stop(Thread.java:1063) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at com.example.sample3dchart.ButtonFragment.onTouch(ButtonFragment.java:64) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.View.dispatchTouchEvent(View.java:7241) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2174) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1917) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1953) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1405) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.app.Activity.dispatchTouchEvent(Activity.java:2410) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1901) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.View.dispatchPointerEvent(View.java:7426) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3220) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3165) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4292) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4271) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4363) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:179) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.os.MessageQueue.nativePollOnce(Native Method) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.os.MessageQueue.next(MessageQueue.java:125) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.os.Looper.loop(Looper.java:124) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at android.app.ActivityThread.main(ActivityThread.java:5041) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at java.lang.reflect.Method.invoke(Method.java:511) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
01-08 18:01:28.371: E/AndroidRuntime(4125):  at dalvik.system.NativeStart.main(Native Method)

來源

2013-11-25 vatsalya_mathur

+0

首先，您無法在Java中停止線程。 –

+0

這無關你的問題，而是因爲你只要用戶從視圖升降機創建一個新的線程對象，你永遠不會停止的舊線。 另外，stop（）是不推薦的調用。 – DeeV

+1

這不是空指針異常。這是一個「UnsupportedOperationException」，因爲你調用了一個無效的方法'stop（）' – DeeV

回答

2

你崩潰的原因是因爲你誤用Java線程通過調用大量棄用的來實現對象方法來結束你的線程。

private MyThread mAction; 
    private class MyThread extends Thread() { 
    volatile boolean keepRunning = true; 

    @Override 
    public void run() { 
     try { 
     ChartJNI3D.cameraPos(1.0f, 'U'); 
     while(keepRunning); 
     } catch (InterruptedException e) {} 
    } 

    public void quit() { 
     keepRunning = false; 
    } 
    } 

    @Override 
    public boolean onTouch(View v, MotionEvent event) { 
    switch(v.getId()) { 
     case R.id.buttonUp: { 
      if(event.getAction() == MotionEvent.ACTION_DOWN) 
       mAction = new MyThread(); 
       mAction.start(); 
      else if (event.getAction() == MotionEvent.ACTION_UP) 
       mAction.quit(); 
     } 
     break; 
    } 
    }

來源

2013-11-25 05:33:00 DeeV

+0

謝謝，會試試看。 –

+0

試過了，它工作正常，但仍然作爲OnClickListener工作。 我想要實現連續輸入，但不實現它。 而我不能保持'run（）'預定義因爲我有不同的按鈕不同的定義。 –

+0

進行了一些更改。謝謝 –

相關問題

 相關問題