Android獲得已安裝應用程序的列表

列出所有已安裝的應用程序：

    ListView lView;  
    List<String> results = new  ArrayList<String>();  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
     super.onCreate(savedInstanceState);  
     setContentView(R.layout.activity_main);  
     lView = (ListView) findViewById(R.id.listView1);  

     PackageManager pm = this.getPackageManager();  
     Intent intent = new Intent(Intent.ACTION_MAIN, null);  
     intent.addCategory(Intent.CATEGORY_LAUNCHER);  

     List<ResolveInfo> list = pm.queryIntentActivities(intent, PackageManager.PERMISSION_GRANTED);  

     for (ResolveInfo rInfo : list) {  
         results.add(rInfo.activityInfo.applicationInfo.loadLabel(pm).toString());  
     }  

     lView.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1, results));