[COCOS2DX-LUA]0-006.cocos2dx中关于拖动屏幕物件，同时点击home键，返回后页面变黑的问题。

基本信息介绍:

引擎框架: Quick-Cocos2dx-Community-3.6

测试机型: 魅族MX5

问题简介：

有拖动效果的物件，在拖动的工程中，手指不放，同时点击home键退到后台。

再返回应用，发现onTouchEnded里头有添加精灵的话，会变黑色。

问题排查:

首先排查生命周期。因为属于点击会被打断，会执行onTouchCancelled。所以真机调试发现先执行了onPause事件，再执行了onTouchCancelled。

这2个时间有一定的间隔时间，导致图片没加载进内存，但是缓存存在了。

问题思考：

1.能否调整生命周期

把onPause()打开，会有其他问题。

2.思考把onTouchCancel调用提前

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 package org.cocos2dx.lib;

 import android.content.Context;
 import android.opengl.GLSurfaceView;
 import android.os.Handler;
 import android.os.Message;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.inputmethod.InputMethodManager;

 import com.babybus.app.App;
 import com.babybus.utils.GameCallbackManager;
 import com.babybus.utils.LogUtil;

 public class Cocos2dxGLSurfaceView extends GLSurfaceView {
     // ===========================================================
     // Constants
     // ===========================================================

     private static final String TAG = Cocos2dxGLSurfaceView.class.getSimpleName();

     private final static int HANDLER_OPEN_IME_KEYBOARD = 2;
     private final static int HANDLER_CLOSE_IME_KEYBOARD = 3;

     // ===========================================================
     // Fields
     // ===========================================================

     // Static handler -> Potential leak!
     private static Handler sHandler;

     private static Cocos2dxGLSurfaceView mCocos2dxGLSurfaceView;
     private static Cocos2dxTextInputWraper sCocos2dxTextInputWraper;

     private Cocos2dxRenderer mCocos2dxRenderer;
     private Cocos2dxEditText mCocos2dxEditText;

     // 记录当前点击事件的值
     private int[] touchIds;
     private float[] touchXs;
     private float[] touchYs;

     // ===========================================================
     // Constructors
     // ===========================================================

     public Cocos2dxGLSurfaceView(final Context context) {
         super(context);

         this.initView();
     }

     public Cocos2dxGLSurfaceView(final Context context, final AttributeSet attrs) {
         super(context, attrs);

         this.initView();
     }

     protected void initView() {
         this.setEGLContextClientVersion(2);
         this.setFocusableInTouchMode(true);

         Cocos2dxGLSurfaceView.mCocos2dxGLSurfaceView = this;
         Cocos2dxGLSurfaceView.sCocos2dxTextInputWraper = new Cocos2dxTextInputWraper(this);

         Cocos2dxGLSurfaceView.sHandler = new Handler() {
             @Override
             public void handleMessage(final Message msg) {
                 switch (msg.what) {
                     case HANDLER_OPEN_IME_KEYBOARD:
                         if (null != Cocos2dxGLSurfaceView.this.mCocos2dxEditText && Cocos2dxGLSurfaceView.this.mCocos2dxEditText.requestFocus()) {
                             Cocos2dxGLSurfaceView.this.mCocos2dxEditText.removeTextChangedListener(Cocos2dxGLSurfaceView.sCocos2dxTextInputWraper);
                             Cocos2dxGLSurfaceView.this.mCocos2dxEditText.setText("");
                             final String text = (String) msg.obj;
                             Cocos2dxGLSurfaceView.this.mCocos2dxEditText.append(text);
                             Cocos2dxGLSurfaceView.sCocos2dxTextInputWraper.setOriginText(text);
                             Cocos2dxGLSurfaceView.this.mCocos2dxEditText.addTextChangedListener(Cocos2dxGLSurfaceView.sCocos2dxTextInputWraper);
                             final InputMethodManager imm = (InputMethodManager) Cocos2dxGLSurfaceView.mCocos2dxGLSurfaceView.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
                             imm.showSoftInput(Cocos2dxGLSurfaceView.this.mCocos2dxEditText, 0);
                             Log.d("GLSurfaceView", "showSoftInput");
                         }
                         break;

                     case HANDLER_CLOSE_IME_KEYBOARD:
                         if (null != Cocos2dxGLSurfaceView.this.mCocos2dxEditText) {
                             Cocos2dxGLSurfaceView.this.mCocos2dxEditText.removeTextChangedListener(Cocos2dxGLSurfaceView.sCocos2dxTextInputWraper);
                             final InputMethodManager imm = (InputMethodManager) Cocos2dxGLSurfaceView.mCocos2dxGLSurfaceView.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
                             imm.hideSoftInputFromWindow(Cocos2dxGLSurfaceView.this.mCocos2dxEditText.getWindowToken(), 0);
                             Cocos2dxGLSurfaceView.this.requestFocus();
                             Log.d("GLSurfaceView", "HideSoftInput");
                         }
                         break;
                 }
             }
         };
     }

     // ===========================================================
     // Getter & Setter
     // ===========================================================

        public static Cocos2dxGLSurfaceView getInstance() {
        return mCocos2dxGLSurfaceView;
        }

        public static void queueAccelerometer(final float x, final float y, final float z, final long timestamp) {
        mCocos2dxGLSurfaceView.queueEvent(new Runnable() {
         @Override
             public void run() {
                 Cocos2dxAccelerometer.onSensorChanged(x, y, z, timestamp);
         }
         });
     }

     public void setCocos2dxRenderer(final Cocos2dxRenderer renderer) {
         this.mCocos2dxRenderer = renderer;
         this.setRenderer(this.mCocos2dxRenderer);
     }

     private String getContentText() {
         return this.mCocos2dxRenderer.getContentText();
     }

     public Cocos2dxEditText getCocos2dxEditText() {
         return this.mCocos2dxEditText;
     }

     public void setCocos2dxEditText(final Cocos2dxEditText pCocos2dxEditText) {
         this.mCocos2dxEditText = pCocos2dxEditText;
         if (null != this.mCocos2dxEditText && null != Cocos2dxGLSurfaceView.sCocos2dxTextInputWraper) {
             this.mCocos2dxEditText.setOnEditorActionListener(Cocos2dxGLSurfaceView.sCocos2dxTextInputWraper);
             this.mCocos2dxEditText.setCocos2dxGLSurfaceView(this);
             this.requestFocus();
         }
     }

     // ===========================================================
     // Methods for/from SuperClass/Interfaces
     // ===========================================================

     @Override
     public void onResume() {
         this.queueEvent(new Runnable() {
             @Override
             public void run() {
                 Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleOnResume();
             }
         });

         this.setRenderMode(RENDERMODE_CONTINUOUSLY);
         super.onResume();
     }

     @Override
     public void onPause() {
         this.queueEvent(new Runnable() {
             @Override
             public void run() {
                 Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleOnPause();
             }
         });
         this.setRenderMode(RENDERMODE_WHEN_DIRTY);
         if(touchIds != null){
             this.queueEvent(new Runnable() {
                 @Override
                 public void run() {
                     Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionCancel(touchIds, touchXs, touchYs);
                 }
             });
         }
 //        super.onPause();
     }

     @Override
     public boolean onTouchEvent(final MotionEvent pMotionEvent) {

         if (App.get().isLockGameTouch){
             return false;
         }
         // these data are used in ACTION_MOVE and ACTION_CANCEL
         final int pointerNumber = pMotionEvent.getPointerCount();
         final int[] ids = new int[pointerNumber];
         final float[] xs = new float[pointerNumber];
         final float[] ys = new float[pointerNumber];

         for (int i = 0; i < pointerNumber; i++) {
             ids[i] = pMotionEvent.getPointerId(i);
             xs[i] = pMotionEvent.getX(i);
             ys[i] = pMotionEvent.getY(i);
         }

         switch (pMotionEvent.getAction() & MotionEvent.ACTION_MASK) {
             case MotionEvent.ACTION_POINTER_DOWN:
                 final int indexPointerDown = pMotionEvent.getAction() >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
                 final int idPointerDown = pMotionEvent.getPointerId(indexPointerDown);
                 final float xPointerDown = pMotionEvent.getX(indexPointerDown);
                 final float yPointerDown = pMotionEvent.getY(indexPointerDown);

                 touchIds = ids;
                 touchXs  = xs;
                 touchYs  = ys;

                 this.queueEvent(new Runnable() {
                     @Override
                     public void run() {
                         Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionDown(idPointerDown, xPointerDown, yPointerDown);
                     }
                 });
                 break;

             case MotionEvent.ACTION_DOWN:
                 // there are only one finger on the screen
                 final int idDown = pMotionEvent.getPointerId(0);
                 final float xDown = xs[0];
                 final float yDown = ys[0];

                 touchIds = ids;
                 touchXs  = xs;
                 touchYs  = ys;

                 this.queueEvent(new Runnable() {
                     @Override
                     public void run() {
                         Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionDown(idDown, xDown, yDown);
                     }
                 });
                 break;

             case MotionEvent.ACTION_MOVE:

                 touchIds = ids;
                 touchXs  = xs;
                 touchYs  = ys;

                 this.queueEvent(new Runnable() {
                     @Override
                     public void run() {
                         Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionMove(ids, xs, ys);
                     }
                 });
                 break;

             case MotionEvent.ACTION_POINTER_UP:
                 final int indexPointUp = pMotionEvent.getAction() >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
                 final int idPointerUp = pMotionEvent.getPointerId(indexPointUp);
                 final float xPointerUp = pMotionEvent.getX(indexPointUp);
                 final float yPointerUp = pMotionEvent.getY(indexPointUp);

                 touchIds = null;
                 touchXs  = null;
                 touchYs  = null;
                 this.queueEvent(new Runnable() {
                     @Override
                     public void run() {
                         Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionUp(idPointerUp, xPointerUp, yPointerUp);
                     }
                 });
                 break;

             case MotionEvent.ACTION_UP:
                 // there are only one finger on the screen
                 final int idUp = pMotionEvent.getPointerId(0);
                 final float xUp = xs[0];
                 final float yUp = ys[0];
290                 touchIds = null;
                 touchXs  = null;
                 touchYs  = null;
                 this.queueEvent(new Runnable() {
                     @Override
                     public void run() {
                         Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionUp(idUp, xUp, yUp);
                     }
                 });
                 break;

             case MotionEvent.ACTION_CANCEL:
                 touchIds = null;
                 touchXs  = null;
                 touchYs  = null;
                 this.queueEvent(new Runnable() {
                     @Override
                     public void run() {
 //                        Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleActionCancel(ids, xs, ys);
                     }
                 });
                 break;
         }

         /*
         if (BuildConfig.DEBUG) {
             Cocos2dxGLSurfaceView.dumpMotionEvent(pMotionEvent);
         }
         */
         return true;
     }

     /*
      * This function is called before Cocos2dxRenderer.nativeInit(), so the
      * width and height is correct.
      */
     @Override
     protected void onSizeChanged(final int pNewSurfaceWidth, final int pNewSurfaceHeight, final int pOldSurfaceWidth, final int pOldSurfaceHeight) {
         if(!this.isInEditMode()) {
             this.mCocos2dxRenderer.setScreenWidthAndHeight(pNewSurfaceWidth, pNewSurfaceHeight);
             String screenSize = ""+pNewSurfaceWidth+"|"+pNewSurfaceHeight;
             LogUtil.t("change===test2");
             GameCallbackManager.gameCallback("FOLD_SCREEN_CHANGE", "NEW_SCREEN_SIZE", screenSize);
         }
     }

     @Override
     public boolean onKeyDown(final int pKeyCode, final KeyEvent pKeyEvent) {
         switch (pKeyCode) {
             case KeyEvent.KEYCODE_BACK:
                 Cocos2dxVideoHelper.mVideoHandler.sendEmptyMessage(Cocos2dxVideoHelper.KeyEventBack);
             case KeyEvent.KEYCODE_MENU:
             case KeyEvent.KEYCODE_DPAD_LEFT:
             case KeyEvent.KEYCODE_DPAD_RIGHT:
             case KeyEvent.KEYCODE_DPAD_UP:
             case KeyEvent.KEYCODE_DPAD_DOWN:
             case KeyEvent.KEYCODE_ENTER:
             case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
             case KeyEvent.KEYCODE_DPAD_CENTER:
                 this.queueEvent(new Runnable() {
                     @Override
                     public void run() {
                         Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleKeyDown(pKeyCode);
                     }
                 });
                 return true;
             default:
                 return super.onKeyDown(pKeyCode, pKeyEvent);
         }
     }

     // ===========================================================
     // Methods
     // ===========================================================

     // ===========================================================
     // Inner and Anonymous Classes
     // ===========================================================

     public static void openIMEKeyboard() {
         final Message msg = new Message();
         msg.what = Cocos2dxGLSurfaceView.HANDLER_OPEN_IME_KEYBOARD;
         msg.obj = Cocos2dxGLSurfaceView.mCocos2dxGLSurfaceView.getContentText();
         Cocos2dxGLSurfaceView.sHandler.sendMessage(msg);
     }

     public static void closeIMEKeyboard() {
         final Message msg = new Message();
         msg.what = Cocos2dxGLSurfaceView.HANDLER_CLOSE_IME_KEYBOARD;
         Cocos2dxGLSurfaceView.sHandler.sendMessage(msg);
     }

     public void insertText(final String pText) {
         this.queueEvent(new Runnable() {
             @Override
             public void run() {
                 Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleInsertText(pText);
             }
         });
     }

     public void deleteBackward() {
         this.queueEvent(new Runnable() {
             @Override
             public void run() {
                 Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleDeleteBackward();
             }
         });
     }

     private static void dumpMotionEvent(final 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 || actionCode == MotionEvent.ACTION_POINTER_UP) {
             sb.append("(pid ").append(action >> MotionEvent.ACTION_POINTER_INDEX_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(Cocos2dxGLSurfaceView.TAG, sb.toString());
     }
 }

经过试验，下面一种完美解决问题。