滑动屏幕来获取当前的坐标位置

package com.bawei.myapplication.gesture;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

/**

• 这里是手势拖动

• @author hasee
  */
  public class CustomGestureView extends View{
  Paint mPaint;
  float mTouchX = 300, mTouchY = 300, mCircleRadius = 50;

  public CustomGestureView(Context context) {
  super(context);
  init();
  }

  public CustomGestureView(Context context, @Nullable AttributeSet attrs) {
  super(context, attrs);
  init();
  }
  private void init() {
  mPaint = new Paint();
  mPaint.setColor(Color.RED);
  mPaint.setStrokeWidth(10);
  mPaint.setStyle(Paint.Style.FILL);

   //监听touch事件
   setOnTouchListener(new OnTouchListener() {
       @Override
       public boolean onTouch(View v, MotionEvent event) {
  
           //获取点击位置
           mTouchX = event.getX();
           mTouchY = event.getY();
  
           //刷新view
           invalidate();
  
           return true;
       }
   });
  

  }

  @Override
  protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  //画圆
  //第一个参数，圆心x轴位置
  //第二个参数，圆心y轴位置
  //第三个参数，圆形半径
  //第四个参数，画笔
  canvas.drawCircle(mTouchX, mTouchY, mCircleRadius, mPaint);
  }
  }