java–OnTouch Listener不会更改位图位置

概述我有一个“Board.java”类,它是一个活动,还有一个“MySurfaceView.java”,它是一个SurfaceView.我正在SurfaceView上绘制一些位图,我想在触摸屏幕时移动它(到触摸的位置).它绘制位图但触摸后没有任何反应.提前致谢！日志：Cancellingeventduetonowindowfocus:MotionEvent{

我有一个“Board.java”类,它是一个活动,还有一个“MySurfaceVIEw.java”,它是一个SurfaceVIEw.我正在SurfaceVIEw上绘制一些位图,我想在触摸屏幕时移动它(到触摸的位置).它绘制位图但触摸后没有任何反应.
提前致谢！

日志：

Cancelling event due to no window focus: MotionEvent { action=ACTION_CANCEL, actionbutton=0, ID[0]=0, x[0]=539.47266, y[0]=978.45703, toolType[0]=TOol_TYPE_FINGER, buttonState=0, MetaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=90656, downTime=88761, deviceid=0, source=0x1002 }

Board.java：

    package com.myfirstapplication.owner.appversion1;import androID.graphics.Bitmap;import androID.graphics.BitmapFactory;import androID.graphics.Canvas;import androID.graphics.color;import androID.os.Bundle;import androID.support.v7.app.AppCompatActivity;import androID.vIEw.MotionEvent;import androID.vIEw.VIEw;import androID.Widget.ImageVIEw;import androID.Widget.relativeLayout;import androID.Widget.TextVIEw;/** * Created by Owner on 15/06/2016. */public class Board extends AppCompatActivity implements VIEw.OntouchListener {    TextVIEw tv;    MySurfaceVIEw mv;    Bitmap bp;    float x, y;    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mv = new MySurfaceVIEw(this);        mv.setontouchListener(this);        bp = BitmapFactory.decodeResource(getResources(), R.drawable.missile_cartoon);        x = 0;        y = 0;        setContentVIEw(mv);    }    @OverrIDe    protected voID onPause() {        super.onPause();        mv.pause();    }    @OverrIDe    protected voID onResume() {        super.onResume();        mv.resume();    }    @OverrIDe    public boolean ontouch(VIEw v, MotionEvent event) {        try {            Thread.sleep(50);        } catch (InterruptedException e) {            e.printstacktrace();        }        x = event.getX();        y = event.getY();        return true;    }   }

MySurfaceVIEw.java：

    package com.myfirstapplication.owner.appversion1;import androID.content.Context;import androID.graphics.Bitmap;import androID.graphics.BitmapFactory;import androID.graphics.Canvas;import androID.graphics.color;import androID.graphics.Paint;import androID.graphics.Path;import androID.graphics.Rect;import androID.util.AttributeSet;import androID.vIEw.MotionEvent;import androID.vIEw.SurfaceHolder;import androID.vIEw.SurfaceVIEw;import androID.vIEw.VIEw;import androID.Widget.ImageVIEw;/** * Created by Owner on 16/06/2016. */public class MySurfaceVIEw extends SurfaceVIEw implements Runnable {    float x, y;    Bitmap bp;    Thread t = null;    SurfaceHolder holder;    boolean isItOK = false;    public MySurfaceVIEw(Context context) {        super(context);        Bitmap bpold = BitmapFactory.decodeResource(getResources(), R.drawable.missile_cartoon);        bp = Bitmap.createScaledBitmap(bpold, 250, 250, true);        x = 0;        y = 0;        holder = getHolder();    }    @OverrIDe    public voID run() {        while(isItOK){            if(!holder.getSurface().isValID())                continue;            Canvas c = holder.lockCanvas();            c.drawARGB(255,150,150,10);            c.drawBitmap(bp,x-(bp.getWIDth()/2),y-(bp.getHeight()/2),null);            holder.unlockCanvasAndPost(c);        }    }    public voID pause() {        isItOK = false;        while(true){            try{                t.join();            }            catch (InterruptedException e){                e.printstacktrace();            }            break;        }        t = null;    }    public voID resume() {        isItOK = true;        t = new Thread(this);        t.start();    }}

解决方法:

在Board中删除touchListener

板：

public class Board extends AppCompatActivity{MySurfaceVIEw mv;Bitmap bp;protected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    mv = new MySurfaceVIEw(this);    bp = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);    setContentVIEw(mv);}@OverrIDeprotected voID onPause() {    super.onPause();    mv.pause();}@OverrIDeprotected voID onResume() {    super.onResume();    mv.resume();}}

并在MySurfaceVIEw中

public class MySurfaceVIEw extends SurfaceVIEw implements Runnable {float x, y;Bitmap bp;Thread t = null;SurfaceHolder holder;boolean isItOK = false;public MySurfaceVIEw(Context context) {    super(context);    Bitmap bpold = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);    bp = Bitmap.createScaledBitmap(bpold, 250, 250, true);    x = 0;    y = 0;    holder = getHolder();}@OverrIDepublic voID run() {    while(isItOK){        if(!holder.getSurface().isValID())            continue;        Canvas c = holder.lockCanvas();        c.drawARGB(255,150,150,10);        c.drawBitmap(bp,x-(bp.getWIDth()/2),y-(bp.getHeight()/2),null);        holder.unlockCanvasAndPost(c);    }}public voID pause() {    isItOK = false;    while(true){        try{            t.join();        }        catch (InterruptedException e){            e.printstacktrace();        }        break;    }    t = null;}public voID resume() {    isItOK = true;    t = new Thread(this);    t.start();}@OverrIDepublic boolean ontouchEvent(MotionEvent event) {    x = event.getX();    y = event.getY();  //  run();    return super.ontouchEvent(event);}}

以上工作对我来说很好.

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