Android使用ComponentName组件简单示例

 1     package com.example.test;  
 2       
 3     import android.os.Bundle;  
 4     import android.app.Activity;  
 5     import android.content.ComponentName;  
 6     import android.content.Intent;  
 7     import android.view.Menu;  
 8     import android.view.View;  
 9     import android.view.View.OnClickListener;  
10     import android.widget.Button;  
11       
12     public class MainActivity extends Activity {  
13       
14         @Override  
15         protected void onCreate(Bundle savedInstanceState) {  
16             super.onCreate(savedInstanceState);  
17             setContentView(R.layout.activity_main);  
18             Button btn = (Button) findViewById(R.id.btn);  
19             btn.setOnClickListener(new OnClickListener() {  
20       
21                 @Override  
22                 public void onClick(View v) {  
23                     // TODO Auto-generated method stub  
24                     Intent intent = new Intent();  
25                     //1.利用setClass  
26                     //intent.setClass(MainActivity.this, SencondActivity.class);  
27                     //2.利用setComponent ComponentName的第一个参数必须是application‘s package name,也是主配置文件Manifest里设置好的包名  
28                     ComponentName name = new ComponentName(getPackageName(), SencondActivity.class.getName());  
29                     intent.setComponent(name);  
30                     startActivity(intent);  
31                 }  
32             });  
33         }  
34       
35         @Override  
36         public boolean onCreateOptionsMenu(Menu menu) {  
37             // Inflate the menu; this adds items to the action bar if it is present.  
38             getMenuInflater().inflate(R.menu.activity_main, menu);  
39             return true;  
40         }  
41       
42     }  
43 
44