android ActivityGroup实现activity的局部跳转

像UC浏览器下面一排的功能按钮，当你点击一个，跳转activity，实际上这排按钮是不应该动的，因为每一页都需要这排按钮。于是，我们就需要只跳转上面部份，有点像HTML的iframe，于是ActivityGroup帮我们实现了这一功能。

有三个activity和三个布局文件。其中，main是主界面，activity1和activity2是要跳转的两个页面。

下面贴上完整代码：

main.java

package wzq.android.three;

import android.app.ActivityGroup;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.widget.Button;
import android.widget.LinearLayout;

public class main extends ActivityGroup  {
 
 

 private Button button1;   
    private Button button2;  
    private LinearLayout container;  
    @Override 
    protected void onCreate(Bundle savedInstanceState) {  
        // TODO Auto-generated method stub  
        super.onCreate(savedInstanceState);  
          
        setContentView(R.layout.main);  
          
        button1 = (Button)findViewById(R.id.button1);  
        button2 = (Button)findViewById(R.id.button2);  
        container = (LinearLayout) findViewById(R.id.container);  
          
          
        button1.setOnClickListener(new OnClickListener(){
   @Override
   public void onClick(View v) {
    container.removeAllViews();
    Intent intent = null;  
    intent = new Intent(main.this,TestActivity1.class);  
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
          Window  subActivity = getLocalActivityManager().startActivity("subActivity", intent);  
          container.addView(subActivity.getDecorView(),LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
   }
        }
        );  
        button2.setOnClickListener(new OnClickListener(){
   @Override
   public void onClick(View v) {
    container.removeAllViews();
    Intent intent = null;  
    intent = new Intent(main.this,TestActivity2.class);  
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
          Window  subActivity = getLocalActivityManager().startActivity("subActivity", intent);  
          container.addView(subActivity.getDecorView(),LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
   }
        }
        );  
          
        init();
    }  
    private void init(){
     container.removeAllViews();
  Intent intent = null;  
  intent = new Intent(main.this,TestActivity1.class);  
  intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
        Window  subActivity = getLocalActivityManager().startActivity("subActivity", intent);  
        container.addView(subActivity.getDecorView(),LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
    }
      
}

 

TestActivity1.java

package wzq.android.three;

import android.app.Activity;
import android.os.Bundle;

public class TestActivity1 extends Activity{
 @Override 
    protected void onCreate(Bundle savedInstanceState) {  
        // TODO Auto-generated method stub  
        super.onCreate(savedInstanceState);  
          
        setContentView(R.layout.ac1);  
          
    }  
}

TestActivity2.java

package wzq.android.three;

import android.app.Activity;
import android.os.Bundle;

public class TestActivity2 extends Activity{
 @Override 
    protected void onCreate(Bundle savedInstanceState) {  
        // TODO Auto-generated method stub  
        super.onCreate(savedInstanceState);  
          
        setContentView(R.layout.ac2);  
          
    }  
}

 

main.xml

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="fill_parent" 
    android:layout_height="fill_parent">  
    
    <LinearLayout android:id="@+id/container" android:orientation="horizontal" 
        android:layout_width="fill_parent" android:layout_height="100dip" 
        android:background="#0000ff">  
    </LinearLayout> 
    <LinearLayout android:orientation="horizontal" 
        android:layout_width="fill_parent" android:layout_height="wrap_content">  
        <Button android:id="@+id/button1" android:layout_width="wrap_content" 
            android:layout_height="wrap_content" android:text="窗体1" />  
        <Button android:id="@+id/button2" android:layout_width="wrap_content" 
            android:layout_height="wrap_content" android:text="窗体2" />  
    </LinearLayout>  
</LinearLayout> 

ac1.xml

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="fill_parent" 
    android:layout_height="fill_parent">  
    <TextView
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"
    android:text="aaaaaaaa111111111111"
        />
</LinearLayout> 

 

ac2.xml

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="fill_parent" 
    android:layout_height="fill_parent">  
    <TextView
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"
    android:text="aaaaaaaa22222222222"
        />
</LinearLayout> 

 

顺便补充一下intent flag方面的知识，我抄来的

一、Activity和Task(栈)的关系

　　Task就像一个容器，而Activity就相当与填充这个容器的东西，第一个东西（Activity）则会处于最下面，最后添加的东西（Activity）则会在最低端。从Task中取出东西（Activity）则是从最顶端取出。

　　二、界面跳转和服务的启动都会用到Intent，现在介绍Intent Flag是关于Activity的跳转
　　Intent intent = new Intent(this,xxx.class);
　　//如果activity在task存在，拿到最顶端,不会启动新的Activity
　　intent.addFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
　　//如果activity在task存在，将Activity之上的所有Activity结束掉
　　intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
　　//默认的跳转类型,将Activity放到一个新的Task中
　　intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
　　//如果Activity已经运行到了Task，再次跳转不会在运行这个Activity
　　intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);

 

 

写了个小升级版，进入Activity1后立即跳以Activity3

package wzq.android.three;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;
import android.view.ViewGroup.LayoutParams;

public class TestActivity1 extends Activity{
 @Override 
    protected void onCreate(Bundle savedInstanceState) {  
        // TODO Auto-generated method stub  
        super.onCreate(savedInstanceState);  
          
        setContentView(R.layout.ac1);  
        main m = (main)getParent();
        m.container.removeAllViews();
  Intent intent = null;  
  intent = new Intent(m,TestActivity3.class); 
  intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
        Window  subActivity = m.getLocalActivityManager().startActivity("subActivity", intent);  
        m.container.addView(subActivity.getDecorView(),LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
    }  
}