Android程式設計 - 列出已安裝的Apps Package名稱

以下程式碼會查詢已安裝的Apps，並將結果顯示在ListView元件：


        PackageManager pmPack;
        pmPack = getPackageManager();
        List packinfo = pmPack.getInstalledPackages(PackageManager.GET_ACTIVITIES);
        String[] pak = new String[packinfo.size()];
        for ( int i=0; i < packinfo.size(); i++) {
        PackageInfo p = (PackageInfo) packinfo.get(i);
        pak[i] = p.packageName;
        }
        ListView lv = (ListView) findViewById(R.id.listView1);
        ArrayAdapter lstadapter = new ArrayAdapter(
        MainActivity.this,
        android.R.layout.simple_list_item_1, pak);
        lv.setAdapter(lstadapter);