因为在开发过程中需要开启扫描第三方程序，并且点击启动的效果，所以对这个功能进行了实现，并且分享出来个大家。

之前看到网上说需要获取包名和类名，然后通过  intent 才能打开这个程序，其实不必要这样。

在android API中，有这么一个接口，

实际说的就是传入包名即可返回Intent，继而startActivity 即可打开第三方程序了。

以下是Demo：

界面 GetApplicationActivity.

public class GetApplicationActivity extends Activity implements

		OnItemClickListener {

	private GetApplicationAdpater mGetApplicationAdpater;

	private ArrayList<ApplicationData> applicationDatas;

	private ArrayList<ApplicationData> tempApplicationDatas;

	private ListView mListView;

	private PackageManager mPackageManager;

	private static final int Refresh_List_View = 0x001;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		mListView = (ListView) findViewById(R.id.application_list);

		initData();

	}

	private void initData() {

		applicationDatas = new ArrayList<ApplicationData>();

		tempApplicationDatas = new ArrayList<ApplicationData>();

		mGetApplicationAdpater = new GetApplicationAdpater(this,

				applicationDatas);

		mListView.setAdapter(mGetApplicationAdpater);

		mListView.setOnItemClickListener(this);

		getData();

		mPackageManager = getPackageManager();

	}

	private void getData() {

		GetApplicationAsyncTask mGetApplicationAsyncTask = new GetApplicationAsyncTask();

		mGetApplicationAsyncTask.getApplicationList(this,

				new GetApplicationList() {

					@Override

					public void dataCallback(

							ArrayList<ApplicationData> applicationDatas) {

						if (applicationDatas != null) {

							tempApplicationDatas = applicationDatas;

						}

						mHandler.sendEmptyMessage(Refresh_List_View);

					}

				});

	}

	private Handler mHandler = new Handler() {

		public void handleMessage(Message msg) {

			switch (msg.what) {

			case Refresh_List_View:

				int count = tempApplicationDatas.size();

				applicationDatas.clear();

				for (int i = 0; i < count; i++) {

					applicationDatas.add(tempApplicationDatas.get(i));

				}

				mGetApplicationAdpater.notifyDataSetChanged();

				break;

			default:

				break;

			}

		};

	};

	@Override

	public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {

		// TODO Auto-generated method stub

		String packageName = applicationDatas.get(position).getPackageName();

		Intent i = mPackageManager.getLaunchIntentForPackage(packageName);

		if (i != null)

			startActivity(i);

	}

}

java

适配器 GetApplicationAdpater.java

public class GetApplicationAdpater extends BaseAdapter{

	private ArrayList<ApplicationData> applicationDatas;

	private LayoutInflater mLayoutInflater;

	public GetApplicationAdpater(Context context,ArrayList<ApplicationData> applicationDatas) {

		super();

		this.applicationDatas = applicationDatas;

		mLayoutInflater = LayoutInflater.from(context);

	}

	@Override

	public int getCount() {

		// TODO Auto-generated method stub

		return applicationDatas.size();

	}

	@Override

	public Object getItem(int position) {

		// TODO Auto-generated method stub

		return applicationDatas.get(position);

	}

	@Override

	public long getItemId(int position) {

		// TODO Auto-generated method stub

		return position;

	}

	@Override

	public View getView(int position, View convertView, ViewGroup parent) {

		ViewHolder mViewHolder;

		ApplicationData mApplicationData = applicationDatas

				.get(position);

		if (convertView == null) {

			mViewHolder = new ViewHolder();

			convertView = mLayoutInflater

					.inflate(R.layout.list_item_view, null);

			mViewHolder.image = (ImageView) convertView

					.findViewById(R.id.image);

			mViewHolder.title = (TextView) convertView.findViewById(R.id.title);

			convertView.setTag(mViewHolder);

		} else {

			mViewHolder = (ViewHolder) convertView.getTag();

		}

		mViewHolder.image.setImageDrawable(mApplicationData.getiCon());

		mViewHolder.title.setText(mApplicationData.getAppName());

		return convertView;

	}

	public final class ViewHolder {

		public ImageView image;

		public TextView title;

	}

}

获取程序包名类 GetApplicationAsyncTask.java

public class GetApplicationAsyncTask extends

		AsyncTask<Integer, Integer, String> {

	private GetApplicationList mGetApplicationList;

	private ArrayList<ApplicationData> applicationDatas;

	private Context mContext;

	@Override

	protected String doInBackground(Integer... params) {

		PackageManager mPackageManager = mContext.getPackageManager();

		List<PackageInfo> packageInfos = mPackageManager

				.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);  获取程序列表

		applicationDatas = new ArrayList<ApplicationData>();

		for (PackageInfo packs : packageInfos) {

			if((packs.applicationInfo.flags&ApplicationInfo.FLAG_SYSTEM)==0)  //主要过滤系统的程序

			{

				ApplicationData mApplicationData= new ApplicationData();

				mApplicationData.setiCon(packs.applicationInfo.loadIcon(mPackageManager));

				mApplicationData.setAppName(packs.applicationInfo.loadLabel(mPackageManager).toString());

				mApplicationData.setPackageName(packs.packageName);

				applicationDatas.add(mApplicationData);

			}

		}

		return null;

	}

	@Override

	protected void onPostExecute(String result) {

		// TODO Auto-generated method stub

		mGetApplicationList.dataCallback(applicationDatas);

	}

	public void getApplicationList(Context context,

			GetApplicationList getApplicationList) {

		this.mGetApplicationList = getApplicationList;

		this.mContext = context;

		this.execute();

	}

	public interface GetApplicationList {

		public void dataCallback(ArrayList<ApplicationData> applicationDatas);

	}

}

代码比较简单，我就不做解释了。