安卓点击事件、触摸事件

1.创建安卓的项目

2.连接好自己的模拟器

3.使用直接拖动的方式实现布局

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="fill_parent"
 3     android:layout_height="fill_parent"
 4     android:orientation="vertical" >
 5 
 6     <LinearLayout
 7         android:layout_width="match_parent"
 8         android:layout_height="wrap_content"
 9         android:orientation="vertical" >
10 
11         <EditText
12             android:id="@+id/editText1"
13             android:layout_width="match_parent"
14             android:layout_height="wrap_content"
15             android:ems="10"
16             android:inputType="textPersonName"
17             android:text="请输入用户名" >
18 
19             <requestFocus />
20         </EditText>
21 
22         <EditText
23             android:id="@+id/editText3"
24             android:layout_width="match_parent"
25             android:layout_height="wrap_content"
26             android:ems="10"
27             android:inputType="textPersonName"
28             android:text="请输入密码" />
29 
30     </LinearLayout>
31 
32     <LinearLayout
33         android:layout_width="match_parent"
34         android:layout_height="wrap_content"
35         android:gravity="right" >
36 
37         <Button
38             android:id="@+id/button1"
39             android:layout_width="wrap_content"
40             android:layout_height="wrap_content"
41             android:text="登录" />
42 
43         <Button
44             android:id="@+id/button2"
45             android:layout_width="wrap_content"
46             android:layout_height="wrap_content"
47             android:text="注册" />
48     </LinearLayout>
49 
50     <LinearLayout
51         android:layout_width="match_parent"
52         android:layout_height="wrap_content" >
53 
54         <ImageView
55             android:id="@+id/imageView1"
56             android:layout_width="208dp"
57             android:layout_height="208dp"
58             android:layout_weight="0.52"
59             android:src="@drawable/ic_launcher" />
60 
61     </LinearLayout>
62 
63 </LinearLayout>

activity_main.xml

4.编写MainActivity.java文件

  1 package com.example.xzt;
  2 
  3 import android.app.Activity;
  4 import android.os.Bundle;
  5 import android.util.Log;
  6 import android.view.KeyEvent;
  7 import android.view.Menu;
  8 import android.view.MenuItem;
  9 import android.view.MotionEvent;
 10 import android.view.View;
 11 import android.view.View.OnClickListener;
 12 import android.widget.Button;
 13 import android.widget.ImageView;
 14 import android.widget.TextView;
 15 /**
 16  * 该类实现的点击事件的接口 要重写点击的方法
 17  * @author xingge
 18  *
 19  */
 20 
 21 public class MainActivity extends Activity implements OnClickListener {
 22     /**
 23      * 设置为全局变量后自动赋值为空
 24      */
 25     ImageView image1;
 26     int toumingdu=100;
 27     private Button button1;
 28     private Button button2;
 29     TextView text1;
 30     TextView text2;
 31     @Override
 32     protected void onCreate(Bundle savedInstanceState) {
 33         super.onCreate(savedInstanceState);
 34         setContentView(R.layout.activity_main);
 35         /**
 36          * 继承了Activity后 获取控件只要this点即可
 37          */
 38         button1 = (Button) this.findViewById(R.id.button1);
 39         button2 = (Button) this.findViewById(R.id.button2);
 40          text1 =(TextView) this.findViewById(R.id.editText1);
 41          text2 =(TextView) this.findViewById(R.id.editText3);
 42         image1 = (ImageView) this.findViewById(R.id.imageView1);
 43         
 44         button1.setOnClickListener(this);
 45         button2.setOnClickListener(this);
 46     }
 47 
 48     @Override
 49     public boolean onCreateOptionsMenu(Menu menu) {
 50         // Inflate the menu; this adds items to the action bar if it is present.
 51         getMenuInflater().inflate(R.menu.main, menu);
 52         return true;
 53     }
 54 
 55     @Override
 56     public boolean onOptionsItemSelected(MenuItem item) {
 57         // Handle action bar item clicks here. The action bar will
 58         // automatically handle clicks on the Home/Up button, so long
 59         // as you specify a parent activity in AndroidManifest.xml.
 60         int id = item.getItemId();
 61         if (id == R.id.action_settings) {
 62             return true;
 63         }
 64         return super.onOptionsItemSelected(item);
 65     }
 66 
 67     @Override
 68     public void onClick(View arg0) {
 69         /**
 70          * argo 表示获取点击事件是空间的id
 71          */
 72         switch (arg0.getId()) {
 73         case R.id.button1:
 74             text1.setText("login");
 75             break;
 76         case R.id.button2:
 77             text2.setText("logout");
 78             break;
 79 
 80         
 81         }
 82         
 83     
 84 
 85     }
 86 
 87     @Override
 88     public boolean onKeyDown(int keyCode, KeyEvent event) {
 89         // TODO Auto-generated method stub
 90         switch (keyCode) {
 91         case KeyEvent.KEYCODE_DPAD_UP:
 92             toumingdu +=10;
 93             image1.setAlpha(toumingdu);//设置透明度的方法
 94             break;
 95         case KeyEvent.KEYCODE_DPAD_DOWN:
 96             toumingdu -=10;
 97             image1.setAlpha(toumingdu);//设置透明度的方法
 98             break;
 99 
100         
101         }
102 
103         return super.onKeyDown(keyCode, event);
104     }
105     
106     /**
107      * 显示触摸的位置
108      */
109     @Override
110     public boolean onTouchEvent(MotionEvent event) {
111         // TODO Auto-generated method stub
112         float x = event.getX();//获得x坐标
113         float y = event.getY();
114         text1.setText("位置x："+x);//设置文本
115         text2.setText("位置y："+y);
116         
117         return super.onTouchEvent(event);
118     }
119     
120     
121 }

MainActivity.java

5.运行结果