android组件通讯 Intent-ComponnentName属性

ComponnentName属性应用实例

/Chapter06_Intent_ComponentName/src/com/amaker/ch06/app/MainActivity.java

代码

   
     

    
      
    
      package
    
       com.amaker.ch06.app;


    
      import
    
       android.app.Activity;

    
      import
    
       android.content.ComponentName;

    
      import
    
       android.content.Intent;

    
      import
    
       android.os.Bundle;

    
      import
    
       android.view.View;

    
      import
    
       android.view.View.OnClickListener;

    
      import
    
       android.widget.Button;


    
      /**
    
      
 * 测试Intent的ComponentName属性
 
    
      */
    
      

    
      public
    
       
    
      class
    
       MainActivity 
    
      extends
    
       Activity {
 
    
      private
    
       Button btn;
 @Override
 
    
      public
    
       
    
      void
    
       onCreate(Bundle savedInstanceState) {
 
    
      super
    
      .onCreate(savedInstanceState);
 
    
      //
    
       设置视图布局
    
      

    
       setContentView(R.layout.main);
 
    
      //
    
       实例化Button
    
      

    
       btn 
    
      =
    
       (Button)findViewById(R.id.myButton01);
 
    
      //
    
       添加单击监听器
    
      

    
       btn.setOnClickListener(
    
      new
    
       OnClickListener() {
 @Override
 
    
      public
    
       
    
      void
    
       onClick(View v) {
 
    
      //
    
       实例化组件名称
    
      

    
       ComponentName cn 
    
      =
    
       
    
      new
    
       ComponentName(MainActivity.
    
      this
    
      , 
    
      "
    
      com.amaker.ch06.app1.MyActivity
    
      "
    
      );
 
    
      //
    
       实例化Intent
    
      

    
       Intent intent 
    
      =
    
       
    
      new
    
       Intent();
 
    
      //
    
       为Intent设置组件名称属性
    
      

    
       intent.setComponent(cn);
 
    
      //
    
       启动Activity
    
      

    
       startActivity(intent);
 }
 });
 }
}
   
     

/Chapter06_Intent_ComponentName/src/com/amaker/ch06/app1/MyActivity.java

代码

   
     

    
      
    
      package
    
       com.amaker.ch06.app1;


    
      import
    
       android.app.Activity;

    
      import
    
       android.content.ComponentName;

    
      import
    
       android.content.Intent;

    
      import
    
       android.os.Bundle;

    
      import
    
       android.widget.TextView;


    
      import
    
       com.amaker.ch06.app.R;


    
      /**
    
      
 * 测试Intent的ComponentName属性
 
    
      */
    
      

    
      public
    
       
    
      class
    
       MyActivity 
    
      extends
    
       Activity {
 
    
      //
    
       声明TextView
    
      

    
       
    
      private
    
       TextView tv;
 @Override
 
    
      public
    
       
    
      void
    
       onCreate(Bundle savedInstanceState) {
 
    
      //
    
       设置视图布局
    
      

    
       
    
      super
    
      .onCreate(savedInstanceState);
 setContentView(R.layout.my_layout);
 
    
      //
    
       获得Intent
    
      

    
       Intent intent 
    
      =
    
       
    
      this
    
      .getIntent();
 
    
      //
    
       获得组件名称对象
    
      

    
       ComponentName cn 
    
      =
    
       intent.getComponent();
 
    
      //
    
       获得包名称
    
      

    
       String packageName 
    
      =
    
       cn.getPackageName();
 
    
      //
    
       获得类名称
    
      

    
       String className 
    
      =
    
       cn.getClassName();
 
    
      //
    
       实例化TextView
    
      

    
       tv 
    
      =
    
       (TextView)findViewById(R.id.TextView01);
 
    
      //
    
       显示
    
      

    
       tv.setText(
    
      "
    
      组件包名称：
    
      "
    
      +
    
      packageName
    
      +
    
      "
    
      \n
    
      "
    
      +
    
      "
    
      组件类名称：
    
      "
    
      +
    
      className);
 }
}
   
     

/Chapter06_Intent_ComponentName/res/layout/main.xml

代码

   
     

    
      
    
      <?
    
      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"
    
      
 
    
      >
    
      
 
    
      <
    
      Button 
 
    
      android:text
    
      ="测试Intent的组件名称属性"
    
       
 android:id
    
      ="@+id/myButton01"
    
       
 android:layout_width
    
      ="wrap_content"
    
       
 android:layout_height
    
      ="wrap_content"
    
      ></
    
      Button
    
      >
    
      

    
      </
    
      LinearLayout
    
      >
    
      

   
     

/Chapter06_Intent_ComponentName/res/layout/my_layout.xml

代码

   
     

    
      
    
      <?
    
      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:text
    
      ="@+id/TextView01"
    
       
 android:id
    
      ="@+id/TextView01"
    
       
 android:layout_width
    
      ="wrap_content"
    
       
 android:layout_height
    
      ="wrap_content"
    
      ></
    
      TextView
    
      >
    
      
 

    
      </
    
      LinearLayout
    
      >