Android系统自带了长按事件，setOnLongClickListener即可监听。但是有时候，你不希望用系统的长按事件，比如当希望长按的时间更长一点的时候。这时候就需要自己来定义这个长按事件了。
1. [代码][Java]代码
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;
if(Math.abs(mLastMotionX-x) > TOUCH_SLOP
|| 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;
}
}
