Android 自定义View实现单击和双击事件的方法

概述自定义View,1.自定义一个Runnable线程TouchEventCountThread, 用来统计500ms内的点击次数

自定义view,

1. 自定义一个Runnable线程touchEventCountThread,  用来统计500ms内的点击次数

2. 在MyVIEw中的 ontouchEvent 中调用 上面的线程

3. 自定义一个Handler,在touchEventHandler 中 处理 统计到的点击事件,单击,双击,三击,都可以处理

核心代码如下： 

public class MyVIEw extends VIEw {  ......  // 统计500ms内的点击次数  touchEventCountThread mIntouchEventCount = new touchEventCountThread();  // 根据touchEventCountThread统计到的点击次数,perform单击还是双击事件  touchEventHandler mtouchEventHandler = new touchEventHandler();  @OverrIDe  public boolean ontouchEvent(MotionEvent event) {    switch (event.getAction()) {      case MotionEvent.ACTION_DOWN:        if (0 == mIntouchEventCount.touchCount) // 第一次按下时,开始统计          postDelayed(mIntouchEventCount,500);        break;      case MotionEvent.ACTION_UP:        // 一次点击事件要有按下和抬起,有抬起必有按下,所以只需要在ACTION_UP中处理        mIntouchEventCount.touchCount++;        // 如果是长按 *** 作,则Handler的消息,不能将touchCount置0,需要特殊处理        if(mIntouchEventCount.isLongClick) {          mIntouchEventCount.touchCount = 0;          mIntouchEventCount.isLongClick = false;        }        break;      case MotionEvent.ACTION_MOVE:        break;      case MotionEvent.ACTION_CANCEL:        break;      default:        break;    }    return super.ontouchEvent(event);  }  public class touchEventCountThread implements Runnable {    public int touchCount = 0;    public boolean isLongClick = false;    @OverrIDe    public voID run() {      Message msg = new Message();      if(0 == touchCount){ // long click        isLongClick = true;      } else {        msg.arg1 = touchCount;        mtouchEventHandler.sendMessage(msg);        touchCount = 0;      }    }  }  public class touchEventHandler extends Handler {    @OverrIDe    public voID handleMessage(Message msg) {      Toast.makeText(mContext,"touch " + msg.arg1 + " time.",Toast.LENGTH_SHORT).show();    }  }  ......}

包装以后如下,这样就能在别的地方调用了：

public interface ondoubleclickListener{    voID ondoubleclick(VIEw v);  }    private ondoubleclickListener mondoubleclickListener;  public voID setondoubleclickListener(MyVIEw.ondoubleclickListener l) {    mondoubleclickListener = l;  }  public boolean performDoubleClick() {    boolean result = false;    if(mondoubleclickListener != null) {      mondoubleclickListener.ondoubleclick(this);      result = true;    }    return result;  }  public class touchEventHandler extends Handler {    @OverrIDe    public voID handleMessage(Message msg) {      if(2 == msg.arg1)        performDoubleClick();    }  }

在Activity中使用：

myVIEw1.setondoubleclickListener(new MyVIEw.ondoubleclickListener() {  @OverrIDe  public voID ondoubleclick(VIEw v) {  Toast.makeText(mContext,"double click",Toast.LENGTH_SHORT).show();  }});

全部代码

MyVIEw.java

package com.carloz.test.myapplication.vIEw;import androID.content.Context;import androID.content.res.TypedArray;import androID.graphics.Bitmap;import androID.graphics.BitmapFactory;import androID.graphics.Canvas;import androID.graphics.Paint;import androID.os.Handler;import androID.os.Message;import androID.util.AttributeSet;import androID.vIEw.MotionEvent;import androID.vIEw.VIEw;import androID.Widget.Toast;import com.carloz.test.myapplication.R;/** * Created by root on 15-11-9. */public class MyVIEw extends VIEw {  private Paint mPaint = new Paint();  private boolean mNotDestroy = true;  private int mCount = 0;  private MyThread myThread;  Bitmap bitmap;  // attrs  private String mText;  private boolean mStartChange;  Context mContext;  public MyVIEw(Context context) {    super(context);    init();  }  public MyVIEw(Context context,AttributeSet attrs) {    super(context,attrs);    TypedArray ta = context.obtainStyledAttributes(attrs,R.styleable.MyVIEw);    mText = ta.getString(R.styleable.MyVIEw_text);    mStartChange = ta.getBoolean(R.styleable.MyVIEw_startChange,false);    // Log.d("ASDF","mText=" + mText + ",mStartChange=" + mStartChange);    ta.recycle();    init();  }  @OverrIDe  protected voID onFinishInflate() {    super.onFinishInflate();  }  @OverrIDe  protected voID onMeasure(int wIDthMeasureSpec,int heightmeasureSpec) {    super.onMeasure(wIDthMeasureSpec,heightmeasureSpec);  }  @OverrIDe  protected voID onLayout(boolean changed,int left,int top,int right,int bottom) {    super.onLayout(changed,left,top,right,bottom);  }  @OverrIDe  protected voID onDraw(Canvas canvas) {    super.onDraw(canvas);    mPaint.setTextSize(50);    canvas.drawText(mText + mCount++,20f,100f,mPaint);    canvas.save();    canvas.rotate(60,getWIDth() / 2,getHeight() / 2);    canvas.drawBitmap(bitmap,50f,mPaint);    canvas.restore();    if (null == myThread) {      myThread = new MyThread();      myThread.start();    }  }  @OverrIDe  public boolean dispatchtouchEvent(MotionEvent ev) {    return super.dispatchtouchEvent(ev);  }  @OverrIDe  protected voID onAttachedToWindow() {    super.onAttachedToWindow();    mNotDestroy = true;  }  @OverrIDe  protected voID onDetachedFromWindow() {    mNotDestroy = false;    super.onDetachedFromWindow();  }  // 统计500ms内的点击次数  touchEventCountThread mIntouchEventCount = new touchEventCountThread();  // 根据touchEventCountThread统计到的点击次数,Toast.LENGTH_SHORT).show();    }  }  class MyThread extends Thread {    @OverrIDe    public voID run() {      super.run();      while (mNotDestroy) {        if (mStartChange) {          postInvalIDate();          try {            Thread.sleep(500);          } catch (InterruptedException e) {            e.printstacktrace();          }        }      }    }  }  public voID init() {    mContext = getContext();    bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.ic_launcher);  }  public voID setText(String mText) {    this.mText = mText;  }  public voID setStartChange(boolean mStartChange) {    this.mStartChange = mStartChange;  }  public boolean getStartChange() {    return this.mStartChange;  }}

attrs.xml

<?xml version="1.0" enCoding="utf-8"?><resources>  <declare-styleable name="MyVIEw">    <attr name="text" format="string"/>    <attr name="startChange" format="boolean"/>  </declare-styleable></resources>

postDelayed方法最终是靠 Handler 的 postDelayed 方法 实现原理如下

public final boolean postDelayed(Runnable r,long delayMillis)  {    return sendMessageDelayed(getPostMessage(r),delayMillis);  }  public final boolean sendMessageDelayed(Message msg,long delayMillis)  {    if (delayMillis < 0) {      delayMillis = 0;    }    return sendMessageAtTime(msg,SystemClock.uptimeMillis() + delayMillis);  }  public boolean sendMessageAtTime(Message msg,long uptimeMillis) {    MessageQueue queue = mQueue;    if (queue == null) {      RuntimeException e = new RuntimeException(          this + " sendMessageAtTime() called with no mQueue");      Log.w("Looper",e.getMessage(),e);      return false;    }    return enqueueMessage(queue,msg,uptimeMillis); // 然后在MessageQueue中会比较时间顺序  }

以上就是小编为大家带来的AndroID 自定义view实现单击和双击事件的方法的全部内容了，希望对大家有所帮助，多多支持编程小技巧~

总结

以上是内存溢出为你收集整理的Android 自定义View实现单击和双击事件的方法全部内容，希望文章能够帮你解决Android 自定义View实现单击和双击事件的方法所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。