1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout
 3     xmlns:android="http://schemas.android.com/apk/res/android"
 4     xmlns:app="http://schemas.android.com/apk/res-auto"
 5     xmlns:tools="http://schemas.android.com/tools"
 6     android:layout_width="match_parent"
 7     android:layout_height="match_parent"
 8     tools:context=".MainActivity">
 9
10     <ImageView
11         android:id="@+id/textview"
12         android:src="@drawable/ic_launcher_foreground"
13         android:layout_width="wrap_content"
14         android:layout_height="wrap_content"
15         android:background="@color/colorPrimaryDark"
16         android:text="www.baidu.com"/>
17
18 </LinearLayout>

 1 package com.example.a11658.textviewdrag;
 2
 3 import android.annotation.SuppressLint;
 4 import android.os.Bundle;
 5 import android.support.v7.app.AppCompatActivity;
 6 import android.view.MotionEvent;
 7 import android.view.View;
 8 import android.widget.ImageView;
 9
10 public class MainActivity extends AppCompatActivity {
11     private ImageView tv;
12     private int x;
13     private int y;
14
15     @SuppressLint("ClickableViewAccessibility")
16     @Override
17     protected void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.activity_main);
20
21         tv = findViewById(R.id.textview);
22         tv.setOnTouchListener(new View.OnTouchListener() {
23             @Override
24             public boolean onTouch(View v, MotionEvent event) {
25                 switch (event.getAction()) {
26                     case MotionEvent.ACTION_DOWN:
27                         //手指按下
28                         //获取第一次接触屏幕
29                         x = (int) event.getRawX();
30                         y = (int) event.getRawY();
31                         break;
32                     case MotionEvent.ACTION_MOVE:
33                         //手指拖动
34                         //获取距离差
35                         int dx = (int) event.getRawX() - x;
36                         int dy = (int) event.getRawY() - y;
37                         //更改Imageview在窗体的位置
38                         v.layout(v.getLeft() + dx, v.getTop() + dy,
39                                 v.getRight() + dx, v.getBottom() + dy);
40                         //获取移动后的位置
41                         x = (int) event.getRawX();
42                         y = (int) event.getRawY();
43                         break;
44                     case MotionEvent.ACTION_UP:
45                         //手指弹起
46                         x = (int) event.getRawX();
47                         y = (int) event.getRawY();
48                         break;
49                 }
50                 return true;
51             }
52         });
53     }
54 }