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public class InstalledApplicationListActivity extends ListActivity implements OnItemClickListener{

    private List<String> mPackages = new ArrayList<String>();
   
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        PackageManager packageManager = getPackageManager();
        List<PackageInfo> packageInfos = packageManager
                .getInstalledPackages(PackageManager.GET_ACTIVITIES);
       
        for(PackageInfo packageInfo : packageInfos) {
            mPackages.add(packageInfo.applicationInfo.loadLabel(packageManager)
                    + "\n" + packageInfo.packageName);
        }
       
       // ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, textViewResourceId)
        ArrayAdapter<String> arrayAdapter =
              new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, mPackages);
        setListAdapter(arrayAdapter);
        getListView().setOnItemClickListener(this);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        Intent intent = new Intent();
        intent.putExtra("package_name", mPackages.get(position));
        setResult(1, intent);
        finish();
    }

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原文地址：http://www.cnblogs.com/zhangkefan/p/5043322.html