图片： 1 2：
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图片3， 4， 5：
- 代码阅读
- 点击按钮6 切换到图片界面 点击图片可进行图片1 和 2多次切换
- 点击按钮5 切换到图片界面 点击图片可进行图片3， 4， 5 多次切换
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代码实现：MainActivity.java
1 package com.example.a07_button;
2
3 import android.os.Bundle;
4 import android.app.Activity;
5 import android.content.Intent;
6 import android.util.Log;
7 import android.view.Menu;
8 import android.view.View;
9 import android.view.View.OnClickListener;
10 import android.widget.Button;
11 import android.widget.Toast;
12
13 public class MainActivity extends Activity implements OnClickListener {
14 private Button btn, btn1, btn2, btn3, btn4, btn5;
15
16 @Override
17 protected void onCreate(Bundle savedInstanceState) {
18 super.onCreate(savedInstanceState);
19 setContentView(R.layout.activity_main);
20 findbyid();// 实现这个方法，调用写完，在去写实现 ，Ctrl+1就可以实现
21 btn.setOnClickListener(new OnClickListener() {
22
23 @Override
24 public void onClick(View v) {
25 // Toast叫做文本提示框
26 Toast.makeText(getApplicationContext(), "匿名内部类的形式", 1).show();
27 /**
28 * 参数1 ：上下文对象 参数2： 打印信息 参数3: 延迟时间
29 */
30 }
31 });
32 btn1.setOnClickListener(new onclickli());// 内部类的实现
33 outclick o = new outclick(getApplicationContext());// 创建他的对象传递getApplicationContext
34 btn2.setOnClickListener(o);
35
36 btn3.setOnClickListener(this);// this 代表的是当前类的对象 MainActivity
37 btn4.setOnClickListener(this);
38 }
39
40 private void findbyid() {
41 btn = (Button) findViewById(R.id.button1);// 匿名内部类的形式
42 btn1 = (Button) findViewById(R.id.button2);// 内部类的实现
43 btn2 = (Button) findViewById(R.id.button3);// 外部类的实现
44 btn3 = (Button) findViewById(R.id.button4);// Activity的接口实现
45 btn4 = (Button) findViewById(R.id.button5);
46 btn5 = (Button) findViewById(R.id.button6);// 在XMl使用android:onClick="MyLinsten"
47
48 }
49
50 class onclickli implements OnClickListener {// 内部类的实现
51
52 @Override
53 public void onClick(View v) {
54 Toast.makeText(getApplicationContext(), "内部类的实现", 1).show();
55
56 }
57
58 }
59
60 public void MyLinsten(View v) {// 这是第五种方法
61 Intent i = new Intent(getApplicationContext(), SecondImageButton.class);
62 startActivity(i);
63
64 }
65
66 @Override
67 public void onClick(View v) {
68 switch (v.getId()) {
69 case R.id.button4:
70 Toast.makeText(getApplicationContext(), "这是按钮4", 1).show();
71
72 break;
73 case R.id.button5: // Imageview的跳转
74 Toast.makeText(getApplicationContext(), "这是按钮5", 1).show();
75 Intent i = new Intent(getApplicationContext(), thirdImageView.class);
76 startActivity(i);
77
78 break;
79 default:
80 break;
81 }
82
83 }
84
85 }
86
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outclick.java：
outclick.java
1 package com.example.a07_button;
2
3 import com.example.a07_button.MainActivity.onclickli;
4
5 import android.content.Context;
6 import android.view.View;
7 import android.view.View.OnClickListener;
8 import android.widget.Toast;
9
10 public class outclick implements OnClickListener {
11 /**
12 * Context（上下文对象）：他只有在activity里面有这个对象
13 */
14 private Context context;
15
16 public outclick(Context context) {
17 //使用构造器进行传递context 赋值给我们的属性并声明全局，以供给我们的onclick方法使用
18 this.context = context;
19 }
20
21 @Override
22 public void onClick(View v) {
23 Toast.makeText(context, "当前为外部类", 1).show();
24 }
25
26 }
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.java
SecondImageButton.java：
1 package com.example.a07_button;
2
3 import android.app.Activity;
4 import android.os.Bundle;
5 import android.view.View;
6 import android.view.View.OnClickListener;
7 import android.widget.ImageButton;
8
9 public class SecondImageButton extends Activity {
10 private ImageButton ib2;
11 private boolean flag = true;
12
13 @Override
14 protected void onCreate(Bundle savedInstanceState) {
15 // TODO Auto-generated method stub
16 super.onCreate(savedInstanceState);
17 setContentView(R.layout.activity_second);
18 /**
19 * 当我们设置为src时 android:src="@drawable/nvjing" 改变图片用的是
20 *
21 * ib2.setImageResource(R.drawable.hanbing); 当我们设置为background
22 */
23 ib2 = (ImageButton) findViewById(R.id.ib);
24 ib2.setOnClickListener(new OnClickListener() {
25
26 @Override
27 public void onClick(View v) {
28 if (flag) {
29 ib2.setBackgroundResource(R.drawable.nvjing);
30 flag = false;
31 // 对应android:background="@drawable/hanbing"
32 } else {
33 ib2.setBackgroundResource(R.drawable.hanbing);// 对应android:background="@drawable/hanbing"
34 flag = true;
35 }
36
37 // ib2.setImageResource(R.drawable.hanbing);//这是对应src的属性
38
39 }
40 });
41 }
42 }
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thirdImageView.java
thirdImageView.java：
1 package com.example.a07_button;
2
3 import android.app.Activity;
4 import android.os.Bundle;
5 import android.view.View;
6 import android.view.View.OnClickListener;
7 import android.widget.Button;
8 import android.widget.ImageView;
9
10 public class thirdImageView extends Activity implements OnClickListener {
11 private Button pre, next;
12 private ImageView iv;
13 private int iamges[];
14 private int current;
15
16 @Override
17 protected void onCreate(Bundle savedInstanceState) {
18 // TODO Auto-generated method stub
19 super.onCreate(savedInstanceState);
20 setContentView(R.layout.activity_third);
21 findbyid();
22 Init();
23 }
24
25 private void Init() {
26 iamges = new int[] { R.drawable.hanbing, R.drawable.kate,
27 R.drawable.nvjing };
28 // iv.setImageDrawable(getResources().getDrawable(R.drawable.kate));//寻找型
29 iv.setBackgroundResource(R.drawable.kate);// 对应的是第二章图片
30 current = 1;
31
32 }
33
34 private void findbyid() {
35 pre = (Button) findViewById(R.id.pre);
36 next = (Button) findViewById(R.id.next);
37 iv = (ImageView) findViewById(R.id.iv);
38 pre.setOnClickListener(this);
39 next.setOnClickListener(this);
40
41 }
42
43 @Override
44 public void onClick(View v) {
45 switch (v.getId()) {
46 case R.id.pre:// 上一张
47 current = (current - 1 + iamges.length) % iamges.length;
48
49 iv.setBackgroundResource(iamges[current]);
50 break;
51 case R.id.next:// 下一张
52 current = (current + 1 + iamges.length) % iamges.length;
53
54 iv.setBackgroundResource(iamges[current]);
55 break;
56 default:
57 break;
58 }
59
60 }
61 }
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AndroidManifest.xml：
1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3 package="com.example.a07_button" 4 android:versionCode="1" 5 android:versionName="1.0" > 6 <uses-sdk 7 android:minSdkVersion="10" 8 android:targetSdkVersion="10" /> 9 10 <application 11 android:allowBackup="true" 12 android:icon="@drawable/ic_launcher" 13 android:label="@string/app_name" 14 android:theme="@style/AppTheme" > 15 <activity 16 android:name="com.example.a07_button.MainActivity" 17 android:label="@string/app_name" > 18 <intent-filter> 19 <action android:name="android.intent.action.MAIN" /> 20 21 <category android:name="android.intent.category.LAUNCHER" /> 22 </intent-filter> 23 </activity> 24 <activity android:name="com.example.a07_button.SecondImageButton" > 25 </activity> 26 <activity android:name="com.example.a07_button.thirdImageView" > 27 </activity> 28 </application> 29 </manifest> 30
时间： 2024-10-17 14:38:15