[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个事件有一定的间隔时间，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];
                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。