補5-22博客 獲取點擊座標並將控件移動到點擊位置

package doge.healthcare.activity;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.Toast;

import doge.healthcare.R;
import doge.healthcare.base.BaseActivity;

/**
 * Created by doge on 2017/5/22.
 */

public class Measure extends BaseActivity {

    private RelativeLayout rl_map;
    private ImageView iv_location;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second_measure);
        rl_map= (RelativeLayout) findViewById(R.id.rl_map);
        iv_location=(ImageView)findViewById(R.id.iv_location);

        //添加觸摸事件
        rl_map.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View arg0, MotionEvent arg1) {

                //獲取點擊位置的座標
                int x = (int) arg1.getX();
                int y = (int) arg1.getY();
                Toast.makeText(getApplicationContext(),"橫座標"+x+"縱座標"+y,Toast.LENGTH_SHORT).show();

                //設定imageview的位置到點擊處
                ViewGroup.MarginLayoutParams margin=new ViewGroup.MarginLayoutParams(iv_location.getLayoutParams());
                margin.setMargins(x,y, x+margin.width, y+margin.height);
                RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(margin);
                iv_location.setLayoutParams(layoutParams);
                return false;
            }
        });
    }
}

xml代碼如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
<include
    layout="@layout/title"
    ></include>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/rl_map"
        android:clickable="true">

        <ImageView
            android:id="@+id/iv_location"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/icon_xihuan_dianji"/>

    </RelativeLayout>

</LinearLayout>

效果如下圖