请帮我理解这些错误

Question

我再次与我发布的同一个应用程序发生错误。请再次帮助我。非常感谢

这里是错误：

07-30 16:57:08.613: E/AndroidRuntime(655): java.lang.ArrayIndexOutOfBoundsException: length=12; index=-1 

07-30 16:57:08.613: E/AndroidRuntime(655): at java.util.ArrayList.get(ArrayList.java:306) 

07-30 16:57:08.613: E/AndroidRuntime(655): at sample.app.touchsample.TouchsampleActivity.getTouchedViews(TouchsampleActivity.java:365) 

07-30 16:57:08.613: E/AndroidRuntime(655): at sample.app.touchsample.TouchsampleActivity.dealEvent(TouchsampleActivity.java:78) 

07-30 16:57:08.613: E/AndroidRuntime(655): at sample.app.touchsample.TouchsampleActivity.onTouch(TouchsampleActivity.java:294) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.View.dispatchTouchEvent(View.java:7122) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2170) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1905) 

07-30 16:57:08.613: E/AndroidRuntime(655): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1925) 

07-30 16:57:08.613: E/AndroidRuntime(655): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1379) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.app.Activity.dispatchTouchEvent(Activity.java:2396) 

07-30 16:57:08.613: E/AndroidRuntime(655): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1873) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.View.dispatchPointerEvent(View.java:7307) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3172) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3117) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4153) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4132) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4224) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.os.MessageQueue.nativePollOnce(Native Method) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.os.MessageQueue.next(MessageQueue.java:125) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.os.Looper.loop(Looper.java:124) 

07-30 16:57:08.613: E/AndroidRuntime(655): at android.app.ActivityThread.main(ActivityThread.java:4745) 

07-30 16:57:08.613: E/AndroidRuntime(655): at java.lang.reflect.Method.invokeNative(Native Method) 

07-30 16:57:08.613: E/AndroidRuntime(655): at java.lang.reflect.Method.invoke(Method.java:511) 

07-30 16:57:08.613: E/AndroidRuntime(655): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 

07-30 16:57:08.613: E/AndroidRuntime(655): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 

07-30 16:57:08.613: E/AndroidRuntime(655): at dalvik.system.NativeStart.main(Native Method) 

---

这里是在MainActivity代码：

package sample.app.touchsample; 

import java.util.ArrayList; 
import java.util.HashMap; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.Path; 
import android.media.AudioManager; 
import android.media.MediaPlayer; 
import android.media.SoundPool; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.ViewConfiguration; 
import android.view.ViewGroup; 
import android.view.Window; 
import android.view.WindowManager; 
import android.view.View.OnTouchListener; 
import android.widget.FrameLayout; 
import android.widget.ImageView; 
//import sample.app.touchsample.TouchsampleActivity.secondDrum.thirdDrum; 
import android.widget.LinearLayout; 


public class TouchsampleActivity extends Activity implements OnTouchListener 
{ 





    MediaPlayer mp; 
    SoundPool fx; 
    HashMap <Integer, Integer> fxMap; 

    int sfxId=1; 
    int sfxId2=2; 
    int sfxId3=3; 
    int sfxId4=4; 

    private Path path = new Path(); 

    private View parent; 

    private final ArrayList[] recentTouchedViewsIndex = new ArrayList[12]; 

    private final ArrayList[] downTouchedViewsIndex = new ArrayList[12]; 

    private final ArrayList<View> moveOutsideEnabledViews = new ArrayList<View>(); 

    private final ArrayList<View> multiTouchViews = new ArrayList<View>(); 

    private int mTouchSlop = 24; 

    private static final String TAG = "Touch"; 
    //private ImageView imageView1, imageView2 ; 


    public void addMoveOutsideEnabledViews(final View view) { 
     moveOutsideEnabledViews.add(view); 
    } 


    private void dealEvent(final int actionPointerIndex, 
      final MotionEvent event, final View eventView, 
      final int actionResolved) { 
     int rawX, rawY; 
     final int location[] = { 0, 0 }; 
     eventView.getLocationOnScreen(location); 
     // Log.v("tag", location + ""); 
     rawX = (int) event.getX(actionPointerIndex) + location[0]; 
     rawY = (int) event.getY(actionPointerIndex) + location[1]; 

     final int actionPointerID = event.getPointerId(actionPointerIndex); 
     ArrayList<View> hoverViews = getTouchedViews(rawX, rawY); 

     if (actionResolved == MotionEvent.ACTION_DOWN) { 
      downTouchedViewsIndex[actionPointerID] = (ArrayList<View>) hoverViews 
        .clone(); 
     } 
     // deletes all views which where not clicked on ActionDown 
     if (downTouchedViewsIndex[actionPointerID] != null) { 
      final ArrayList<View> tempViews = (ArrayList<View>) hoverViews 
        .clone(); 
      tempViews.removeAll(downTouchedViewsIndex[actionPointerID]); 
      hoverViews.removeAll(tempViews); 
     } 

     if (recentTouchedViewsIndex[actionPointerID] != null) { 
      final ArrayList<View> recentTouchedViews = recentTouchedViewsIndex[actionPointerID]; 

      final ArrayList<View> shouldTouchViews = (ArrayList<View>) hoverViews 
        .clone(); 
      if (!shouldTouchViews.containsAll(recentTouchedViews)) { 
       shouldTouchViews.removeAll(recentTouchedViews); 
       shouldTouchViews.addAll(recentTouchedViews); 

       final ArrayList<View> outsideTouchedViews = (ArrayList<View>) shouldTouchViews 
         .clone(); 
       outsideTouchedViews.removeAll(hoverViews); 
      } 

      recentTouchedViewsIndex[actionPointerID] = hoverViews; 
      hoverViews = shouldTouchViews; 
     } else { 
      recentTouchedViewsIndex[actionPointerID] = hoverViews; 
     } 

     if (actionResolved == MotionEvent.ACTION_UP) { 
      recentTouchedViewsIndex[actionPointerID] = null; 
      downTouchedViewsIndex[actionPointerID] = null; 
     } 

     dumpEvent(event); 
     for (final View view : hoverViews) { 
      int x, y; 
      view.getLocationOnScreen(location); 
      x = rawX - location[0]; 
      y = rawY - location[1]; 

      // View does not recognize that the Pointer is 
      // outside if the Pointer is not far away (>mTouchSlop) 
      if (recentTouchedViewsIndex[actionPointerID] != null) { 
       if (pointInView(x, y, mTouchSlop, view.getWidth(), 
         view.getHeight())) { 
        // Log.v("tag", "added because < mTouchSlop"); 

        if (!recentTouchedViewsIndex[actionPointerID] 
          .contains(view)) { 
         recentTouchedViewsIndex[actionPointerID].add(view); 
        } 
       } else if (moveOutsideEnabledViews.contains(view)) { 
        Log.v("tag", "outside but gets event"); 
        recentTouchedViewsIndex[actionPointerID].add(view); 
       } 
      } 
      final MotionEvent me = MotionEvent.obtain(event.getDownTime(), 
        event.getEventTime(), actionResolved, x, y, 
        event.getPressure(actionPointerIndex), 
        event.getPressure(actionPointerIndex), 
        event.getMetaState(), event.getXPrecision(), 
        event.getYPrecision(), event.getDeviceId(), 
        event.getEdgeFlags()); 
      me.setLocation(x, y); 

      if (!me.equals(event)) { 
       // deals the Event 
       view.onTouchEvent(me); 
      } 

      // debug 
      if (actionResolved == MotionEvent.ACTION_MOVE) { 
       Log.v("tag", 
         "#" + actionPointerIndex + " Rawx:" + rawX + " rawy:" 
           + rawY + " x:" + x + " y:" + y + " " 
           + view.toString()); 
      } 
     } 

    } 






// @Override 
// public boolean onCreateOptionsMenu(Menu menu) 
    // { 
//  getMenuInflater().inflate(R.menu.touchsample, menu); 
    //  return true; 
// } 





    public class secondDrum implements OnTouchListener 
    { 

     public boolean onTouch(View v, MotionEvent event) 
     { 

      dumpEvent(event); 


      AudioManager bongos2 = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
      float curVolume2 = bongos2.getStreamVolume(AudioManager.STREAM_MUSIC); 
      float maxVolume2 = bongos2.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
      float leftvolume2 = curVolume2/maxVolume2; 
      float rightVolume2 = curVolume2/maxVolume2; 
      int priority2 = 1; 
      int no_loop2 = 0; 
      float normal_playback_rate2=1.0f; 

      fx.play(sfxId2, leftvolume2, rightVolume2, priority2, no_loop2, normal_playback_rate2); 
      return false; 
     } 

    } 






     public class thirdDrum implements OnTouchListener 
     { 

      public boolean onTouch(View v, MotionEvent event) 
      { 

        dumpEvent(event); 
        AudioManager bongos3 = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
        float curVolume = bongos3.getStreamVolume(AudioManager.STREAM_MUSIC); 
        float maxVolume = bongos3.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
        float leftVolume = curVolume/maxVolume; 
        float rightVolume = curVolume/maxVolume; 
        int priority = 1;  
        int no_loop = 0; 
        float normal_playback_rate = 2.0f; 
        fx.play(sfxId3, leftVolume, rightVolume, priority, no_loop, normal_playback_rate); 
        return false; 

        //return false; 
      } 

     } 





      public class forthDrum implements OnTouchListener 
      { 

       public boolean onTouch(View v, MotionEvent event) 
       { 

        dumpEvent(event); 
        AudioManager bongos4 = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
        float curVolume = bongos4.getStreamVolume(AudioManager.STREAM_MUSIC); 
        float maxVolume = bongos4.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
        float leftVolume = curVolume/maxVolume; 
        float rightVolume = curVolume/maxVolume; 
        int priority = 1;  
        int no_loop = 0; 
        float normal_playback_rate = 2.0f; 
        fx.play(sfxId4, leftVolume, rightVolume, priority, no_loop, normal_playback_rate); 
        return false; 
        //return false; 

       } 

      } 







    public boolean onTouch(View view, MotionEvent event) 
    { 

      dumpEvent(event); 

      AudioManager bongos = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
      float curVolume = bongos.getStreamVolume(AudioManager.STREAM_MUSIC); 
      float maxVolume = bongos.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
      float leftVolume = curVolume/maxVolume; 
      float rightVolume = curVolume/maxVolume; 
      int priority = 1;  
      int no_loop = 0; 
      float normal_playback_rate = 1.0f; 
      fx.play(sfxId, leftVolume, rightVolume, priority, no_loop, normal_playback_rate);  
      //return false; 
      //index of the pointer which starts this Event 

      final int actionPointerIndex = event.getActionIndex(); 

      // resolve the action as a basic type (up, down or move) 
      int actionResolved = event.getAction() & MotionEvent.ACTION_MASK; 
      if (actionResolved < 7 && actionResolved > 4) { 
       actionResolved = actionResolved - 5; 
      } 

      if (actionResolved == MotionEvent.ACTION_DOWN) { 
       for (int ptrIndex = 0; ptrIndex < event.getPointerCount(); ptrIndex++) { 
        // only one event for all move events. 
        dealEvent(ptrIndex, event, view, actionResolved); 
        Log.v("tag", "move" + ptrIndex); 
       } 

      } else { 
       dealEvent(actionPointerIndex, event, view, actionResolved); 
      } 

      return false; 
      } 


     private void dumpEvent(MotionEvent event) 
     { 
      final String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE", "POINTER_DOWN", "POINTER_UP", "7?", "8?", "9?" }; 

      final StringBuilder sb = new StringBuilder(); 
      final int action = event.getAction(); 
      final int actionCode = action & MotionEvent.ACTION_MASK; 
      sb.append("event ACTION_").append(names[actionCode]); 


      if(actionCode == MotionEvent.ACTION_POINTER_DOWN) 
      { 
       sb.append("(pid ").append(action >> MotionEvent.ACTION_POINTER_ID_SHIFT); 
       sb.append(")"); 
      } 


      sb.append("["); 


      for (int i = 0; i <event.getPointerCount(); i++) 
      { 
       sb.append("#").append(i); 
       sb.append("(pid ").append(event.getPointerId(i)); 
       sb.append(")=").append((int) event.getX(i)); 
       sb.append(",").append((int) event.getY(i)); 
       if(i + 1 < event.getPointerCount()) 
        sb.append(";"); 
      } 

      sb.append("]"); 
      Log.d(TAG, sb.toString()); 
     } 



     private ArrayList<View> getChildViews(final View view) { 
      final ArrayList<View> views = new ArrayList<View>(); 
      if (view instanceof ViewGroup) { 
       final ViewGroup v = ((ViewGroup) view); 
       if (v.getChildCount() > 0) { 
        for (int i = 0; i < v.getChildCount(); i++) { 
         views.add(v.getChildAt(i)); 
        } 

       } 
      } 
      return views; 
     } 

     private ArrayList<View> getTouchedViews(final int x, final int y) { 

      View lastTouchedView = null; 
      final ArrayList<View> touchedViews = new ArrayList<View>(); 
      final ArrayList<View> possibleViews = new ArrayList<View>(); 

      if (parent instanceof ViewGroup) { 
       possibleViews.add(parent); 
       for (int i = 0; i < possibleViews.size(); i--) { 
        final View view = possibleViews.get(i); 

        final int location[] = { 0, 0 }; 
        view.getLocationOnScreen(location); 

        if (((view.getHeight() + location[1] >= y) 
          & (view.getWidth() + location[0] >= x) 
          & (view.getLeft() <= x) & (view.getTop() <= y)) 
         || view instanceof FrameLayout) { 
         if (this.multiTouchViews.contains(view)){ 
          lastTouchedView = view; 
         } 
         possibleViews.addAll(getChildViews(view)); 
        } 
       } 
       //ArrayList<View> touchedViews = new ArrayList<View>(); 
       if (lastTouchedView != null){ 
         touchedViews.add(lastTouchedView); 
       } 

       return touchedViews; 
      } 
       return possibleViews; 
     } 

    //@Override 
    //public void onCreate(final Bundle instance) { 
    // super.onCreate(instance); 



    //public boolean onTouch(final View v, final MotionEvent event) { 
    @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      requestWindowFeature(Window.FEATURE_NO_TITLE); 
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN); 
      getWindow().clearFlags(
        WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN); 
      setContentView(R.layout.touchsample); 

      fx=new SoundPool(1100, AudioManager.STREAM_MUSIC, 1100); 
      fxMap=new HashMap<Integer, Integer>(); 

      fxMap.put(sfxId, fx.load(this, R.raw.bongo_left, 1)); 
      fxMap.put(sfxId2, fx.load(this, R.raw.bongo_right, 1)); 
      fxMap.put(sfxId3, fx.load(this, R.raw.bongo_left, 1)); 
      fxMap.put(sfxId4, fx.load(this, R.raw.bongo_right, 1)); 

      parent = findViewById(android.R.id.content).getRootView(); 
      parent.setOnTouchListener(this); 
      mTouchSlop = ViewConfiguration.get(getApplicationContext()) 
        .getScaledTouchSlop(); 

     } 



    private boolean pointInView(final float localX, final float localY, 
      final float slop, final float width, final float height) { 
      return localX >= -slop && localY >= -slop && localX < ((width) + slop) 
      && localY < ((height) + slop); 
    } 

} 

---

和扩展：

package sample.app.touchsample; 

import java.util.HashMap; 

import android.content.Context; 
import android.media.AudioManager; 
import android.media.MediaPlayer; 
import android.media.SoundPool; 
import android.os.Bundle; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.View.OnTouchListener; 
import android.view.Window; 
import android.view.WindowManager; 
import android.widget.ImageView; 

public class Multitouch extends TouchsampleActivity{ 



    private ImageView imageview1, imageview2, imageview3, imageview4; 
    MediaPlayer mp; 
    SoundPool fx; 
    HashMap <Integer, Integer> fxMap; 

    int sfxId=1; 
    int sfxId2=2; 
    int sfxId3=3; 
    int sfxId4=4; 



    @Override 
    public void onCreate(final Bundle savedInstanceState) { 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN); 
     getWindow().clearFlags(
       WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN); 

     super.onCreate(savedInstanceState); 
     setContentView(R.layout.touchsample); 

     fx=new SoundPool(1100, AudioManager.STREAM_MUSIC, 1100); 
     fxMap=new HashMap<Integer, Integer>(); 

     fxMap.put(sfxId, fx.load(this, R.raw.bongo_left, 1)); 
     fxMap.put(sfxId2, fx.load(this, R.raw.bongo_right, 1)); 
     fxMap.put(sfxId3, fx.load(this, R.raw.bongo_left, 1)); 
     fxMap.put(sfxId4, fx.load(this, R.raw.bongo_right, 1)); 


     ImageView view = (ImageView) findViewById(R.id.imageView1);  
     view.setOnTouchListener(this); 

     ImageView view2 = (ImageView) findViewById(R.id.imageView2); 
     view2.setOnTouchListener(new secondDrum()); 

     ImageView view3 = (ImageView) findViewById(R.id.imageView3); 
     view3.setOnTouchListener(new thirdDrum()); 

     ImageView view4 = (ImageView) findViewById(R.id.imageView4); 
     view4.setOnTouchListener(new forthDrum()); 

     } 


     public boolean onTouch(View v, MotionEvent event) 
     { 

      switch(event.getAction()) 
      { 
      case MotionEvent.ACTION_DOWN:    
       //dumpEvent(event); 

       AudioManager bongos = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
       float curVolume = bongos.getStreamVolume(AudioManager.STREAM_MUSIC); 
       float maxVolume = bongos.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
       float leftVolume = curVolume/maxVolume; 
       float rightVolume = curVolume/maxVolume; 
       int priority = 1;  
       int no_loop = 0; 
       float normal_playback_rate = 1.0f; 
       fx.play(sfxId, leftVolume, rightVolume, priority, no_loop, normal_playback_rate);  

       return false; 

       case MotionEvent.ACTION_UP: 

       break; 

     } 

      class secondDrum implements OnTouchListener 
      { 

       public boolean onTouch(View v, MotionEvent event) 
       { 
        switch (event.getAction()) 
        { 
        case MotionEvent.ACTION_DOWN: 

       //dumpEvent(event); 

       AudioManager bongos2 = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
       float curVolume2 = bongos2.getStreamVolume(AudioManager.STREAM_MUSIC); 
       float maxVolume2 = bongos2.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
       float leftvolume2 = curVolume2/maxVolume2; 
       float rightVolume2 = curVolume2/maxVolume2; 
       int priority2 = 1; 
       int no_loop2 = 0; 
       float normal_playback_rate2=1.0f; 
       fx.play(sfxId2, leftvolume2, rightVolume2, priority2, no_loop2, normal_playback_rate2); 
       return false; 

        case MotionEvent.ACTION_UP: 

         break; 
      } 


      class thirdDrum implements OnTouchListener 
      { 

       public boolean onTouch(View view, MotionEvent event) 
       { 

        switch(event.getAction()) 
        {   
        case MotionEvent.ACTION_DOWN: 

         //dumpEvent(event); 
         AudioManager bongos3 = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
         float curVolume = bongos3.getStreamVolume(AudioManager.STREAM_MUSIC); 
         float maxVolume = bongos3.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
         float leftVolume = curVolume/maxVolume; 
         float rightVolume = curVolume/maxVolume; 
         int priority = 1;  
         int no_loop = 0; 
         float normal_playback_rate = 2.0f; 
         fx.play(sfxId3, leftVolume, rightVolume, priority, no_loop, normal_playback_rate); 

         return false; 

         case MotionEvent.ACTION_UP: 

         break; 
        } 

      class forthDrum implements OnTouchListener 
      { 
        public boolean onTouch(View v, MotionEvent event) 
        { 

         switch (event.getAction()) 
         { 
          case MotionEvent.ACTION_DOWN: 

           AudioManager bongos4 = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
           float curVolume = bongos4.getStreamVolume(AudioManager.STREAM_MUSIC); 
           float maxVolume = bongos4.getStreamMaxVolume(AudioManager.STREAM_MUSIC); 
           float leftVolume = curVolume/maxVolume; 
           float rightVolume = curVolume/maxVolume; 
           int priority = 1;  
           int no_loop = 0; 
           float normal_playback_rate = 2.0f; 
           fx.play(sfxId4, leftVolume, rightVolume, priority, no_loop, normal_playback_rate); 
           return false; 

          case MotionEvent.ACTION_UP: 

           break; 

           } 
          return true; 
           } 
          } 
        return true; 
         } 
        } 
      return true; 
       } 
      } 
     return true; 
     } 
}   

Answer 1

该错误是在本作：

for (int i = 0; i < possibleViews.size(); i--) 

它应该是：

for (int i = 0; i < possibleViews.size(); i++) 

Answer 2

07-30 16:57:08.613: E/AndroidRuntime(655): 
    java.lang.ArrayIndexOutOfBoundsException: length=12; index=-1 

这是你所需要的重大的事情。它表示您有一个大小为12的数组，但您试图访问元素编号-1。这通常是因为你运行数组的末尾（在这种情况下倒数）。它在Android运行时，但你会发现你可能需要走栈跟踪来找到错误的代码（这几乎是总是你的代码）。

在所有的可能性，这是下面的行：

for (int i = 0; i < possibleViews.size(); i--) 

在 getTouchedViews()

，第三步堆栈和似乎是非Android代码的第一个：

07-30 16:57:08.613: E/AndroidRuntime(655): at 
    sample.app.touchsample.TouchsampleActivity 
     .getTouchedViews(TouchsampleActivity.java:365) 

这循环从零开始并倒数（立即到-1），所以几乎肯定是你的问题。改为使用i++。

Answer 3

当您尝试从数组索引中访问元素时，会发生ArrayIndexOutOfBoundsException。

E.g.考虑你的数组有10个元素，你试图访问元素12或13，这将导致ArrayIndexOutOfBoundsException。

再次查看这些循环并查看数组索引超出界限的位置。还记得在java中的数组以索引0开始，而不是1开始。