android自定义随手指移动Button

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我是靠谱客的博主冷艳御姐，最近开发中收集的这篇文章主要介绍android自定义随手指移动Button，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

定义随手指滑动按钮，限制按钮不可滑动超出屏幕。解决与点击事件冲突问题.

public class MoveButton extends AppCompatButton {
private int lastX;
private int lastY;
private int screenWidth, screenHeight;
public MoveButton(Context context) {
super(context);
}
public MoveButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
screenWidth = displayMetrics.widthPixels;
screenHeight = displayMetrics.heightPixels;
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private int firstX;
private int firstY;
@Override
public boolean onTouchEvent(MotionEvent event) {
super.onTouchEvent(event);
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: // 按下
lastX = (int) event.getRawX();
lastY = (int) event.getRawY();
firstX = (int) event.getRawX();
firstY = (int) event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
int dx = (int) (event.getRawX() - lastX);
int dy = (int) (event.getRawY() - lastY);
int left = getLeft() + dx;
int top = getTop() + dy;
int right = getRight() + dx;
int bottom = getBottom() + dy;
if (left < 0) {
left = 0;
right = left + getWidth();
}
if (right > screenWidth) {
right = screenWidth;
left = right - getWidth();
}
if (top < 0) {
top = 0;
bottom = top + getHeight();
}
if (bottom > screenHeight) {
bottom = screenHeight;
top = bottom - getHeight();
}
layout(left, top, right, bottom);
Log.v("TAG", "left=" + left + "top" + top + "right" + right + "bottom" + bottom);
Log.v("TAG", "screenWidth=" + screenWidth + "screenHeight=" + screenHeight);
lastX = (int) event.getRawX();
lastY = (int) event.getRawY();
return true;
case MotionEvent.ACTION_UP:
int moveX = (int) (event.getRawX() - firstX);
int moveY = (int) (event.getRawY() - firstY);
if (moveX > 4 || moveX < -4 || moveY > 4 || moveY < -4) {
return true;
}
if (listener != null) {
listener.onClick(this);
}
break;
default:
break;
}
return true;
}
/**
* 点击事件监听，解决滑动与点击冲突
*
* @param listener
*/
public void setMoveOnClickListener(OnClickListener listener) {
this.listener = listener;
setOnClickListener(listener);
}
/**
* 屏蔽点击事件
*
* @param l
*/
@Override
public void setOnClickListener(@Nullable OnClickListener l) {
super.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.v("MoveButton", "不准用这个方法!!!");
}
});
}

**用法：在布局文件

`moveButton = view.findViewById(R.id.btn_play_video);
moveButton.setMoveOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});