android开发之一<Activity-Intent-界面跳转>

 1 package com.huang.activity02;
 2 
 3 import android.os.Bundle;
 4 import android.app.Activity;
 5 import android.content.Intent;
 6 import android.view.Menu;
 7 import android.view.View;
 8 import android.view.View.OnClickListener;
 9 import android.widget.Button;
10 
11 public class MainActivity extends Activity {
12 
13     Button mainButton = null;
14     
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         super.onCreate(savedInstanceState);
18         setContentView(R.layout.activity_main);
19         
20         mainButton = (Button)findViewById(R.id.mainButton);
21         
22         mainButton.setText(R.string.mainButtonText);
23         
24         mainButton.setOnClickListener(new OnClickListener()
25         {
26 
27             @Override
28             public void onClick(View arg0) {
29                 // TODO Auto-generated method stub
30                 startActivity(new Intent(MainActivity.this,secondActivity.class));
31             }
32         });
33     }
34 
35 
36     @Override
37     public boolean onCreateOptionsMenu(Menu menu) {
38         // Inflate the menu; this adds items to the action bar if it is present.
39         getMenuInflater().inflate(R.menu.main, menu);
40         return true;
41     }
42     
43 }

 1 package com.huang.activity02;
 2 
 3 import android.app.Activity;
 4 import android.content.Intent;
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.view.View.OnClickListener;
 8 import android.widget.Button;
 9 
10 public class secondActivity extends Activity{
11 
12     Button secondButton = null;
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         secondButton = (Button)findViewById(R.id.secondActivityButtonId);
20         
21         secondButton.setText(R.string.secondButtonText);
22         
23 
24         secondButton.setOnClickListener(new OnClickListener()
25         {
26 
27             @Override
28             public void onClick(View arg0) {
29                 // TODO Auto-generated method stub
30                 startActivity(new Intent(secondActivity.this,MainActivity.class));
31             }
32         });
33         
34     }
35 
36 }

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:paddingBottom="@dimen/activity_vertical_margin"
 6     android:paddingLeft="@dimen/activity_horizontal_margin"
 7     android:paddingRight="@dimen/activity_horizontal_margin"
 8     android:paddingTop="@dimen/activity_vertical_margin"
 9     tools:context=".secondActivity" >
10 
11     <Button 
12         android:id="@+id/secondActivityButtonId"
13         android:layout_width="wrap_content"
14         android:layout_height="wrap_content"
15         android:text="@string/secondButtonInitText"
16         />
17 
18 
19 </RelativeLayout>

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <resources>
 3 
 4     <string name="app_name">MainActivity</string>
 5     <string name="action_settings">Settings</string>
 6     <string name="hello_world">Hello world!</string>
 7     <string name="mainButtonText">Jump</string>
 8     <string name="secondButtonText">Back</string>
 9     <string name="secondActivitylabel">secondActivity</string>
10     <string name="secondButtonInitText">第二给Activity初始文字</string>
11 
12 </resources>

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3     package="com.huang.activity02"
 4     android:versionCode="1"
 5     android:versionName="1.0" >
 6 
 7     <uses-sdk
 8         android:minSdkVersion="8"
 9         android:targetSdkVersion="18" />
10 
11     <application
12         android:allowBackup="true"
13         android:icon="@drawable/ic_launcher"
14         android:label="@string/app_name"
15         android:theme="@style/AppTheme" >
16         <activity
17             android:name="com.huang.activity02.MainActivity"
18             android:label="@string/app_name" >
19             <intent-filter>
20                 <action android:name="android.intent.action.MAIN" />
21 
22                 <category android:name="android.intent.category.LAUNCHER" />
23             </intent-filter>
24         </activity>
25         
26         <activity
27             android:name="com.huang.activity02.secondActivity"
28             android:label="@string/secondActivitylabel"
29         ></activity>
30         
31     </application>
32 
33 </manifest>