獲取android系統上的所有程序信息

在獲取項目的版本信息一文中已經簡要介紹了獲取當前應用程序的基本信息，而下面的示例可以獲取手機上所有的應用程序信息，代碼如下：

MainActivity：

package com.home.getappinfo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.content.pm.PackageInfo;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

	private List> data;
	Map item;
	private ListView listView = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		listView = new ListView(this);
		data = new ArrayList>();
		listPackages();
		SimpleAdapter adapter = new SimpleAdapter(this, data,
				android.R.layout.simple_list_item_2, new String[] { "appname",
						"pname" }, new int[] { android.R.id.text1,
						android.R.id.text2, });
		listView.setAdapter(adapter);
		setContentView(listView);
	}

	class PInfo {
		private String appname = "";
		private String pname = "";
		private String versionName = "";
		private int versionCode = 0;
		private Drawable icon;

		private void prettyPrint() {
			Log.i("taskmanger", appname + "\t" + pname + "\t" + versionName
					+ "\t" + versionCode + "\t");
		}
	}

	/**
	 * 列出所有的APP信息
	 */
	private void listPackages() {
		ArrayList apps = getInstalledApps(false);
		final int max = apps.size();
		for (int i = 0; i < max; i++) {
			apps.get(i).prettyPrint();
			item = new HashMap();
			item.put("appname", apps.get(i).appname);
			item.put("pname", apps.get(i).pname);
			data.add(item);
		}
	}

	/**
	 * 獲取系統所有已安裝的APP信息
	 * 
	 * @param getSysPackages
	 * @return
	 */
	private ArrayList getInstalledApps(boolean getSysPackages) {
		ArrayList res = new ArrayList();
		List packs = getPackageManager().getInstalledPackages(0);
		for (int i = 0; i < packs.size(); i++) {
			PackageInfo p = packs.get(i);
			if ((!getSysPackages) && (p.versionName == null)) {
				continue;
			}
			PInfo newInfo = new PInfo();
			newInfo.appname = p.applicationInfo.loadLabel(getPackageManager())
					.toString();
			newInfo.pname = p.packageName;
			newInfo.versionName = p.versionName;
			newInfo.versionCode = p.versionCode;
			newInfo.icon = p.applicationInfo.loadIcon(getPackageManager());
			res.add(newInfo);
		}
		return res;
	}

}