Android自定义长按事件

核心提示：|| Math.abs(mLastMotionY-y) > TOUCH_SLOP) {//移动超过阈值，则表示移动了isMoved = true;}break;case MotionEvent.ACTION_UP://释放了isReleased = true;break;}return true;}}packag

|| Math.abs(mLastMotionY-y) > TOUCH_SLOP) {

//移动超过阈值，则表示移动了

isMoved = true;

}

break;

case MotionEvent.ACTION_UP:

//释放了

isReleased = true;

break;

}

return true;

}

}

package chroya.fun;

import android.content.Context;

import android.view.MotionEvent;

import android.view.View;

import android.view.ViewConfiguration;

public class LongPressView1 extends View{

private int mLastMotionX, mLastMotionY;

//是否移动了

private boolean isMoved;

//是否释放了

private boolean isReleased;

//计数器，防止多次点击导致最后一次形成longpress的时间变短

private int mCounter;

//长按的runnable

private Runnable mLongPressRunnable;

//移动的阈值

private static final int TOUCH_SLOP = 20;

public LongPressView1(Context context) {

super(context);

mLongPressRunnable = new Runnable() {

@Override

public void run() {

mCounter--;

//计数器大于0，说明当前执行的Runnable不是最后一次down产生的。

if(mCounter>0 || isReleased || isMoved) return;

performLongClick();

}

};

}

public boolean dispatchTouchEvent(MotionEvent event) {

int x = (int) event.getX();

int y = (int) event.getY();

switch(event.getAction()) {

case MotionEvent.ACTION_DOWN:

mLastMotionX = x;

mLastMotionY = y;

mCounter++;

isReleased = false;

isMoved = false;

postDelayed(mLongPressRunnable, ViewConfiguration.getLongPressTimeout());

break;

case MotionEvent.ACTION_MOVE:

if(isMoved) break;

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