显示所有应用程序列表,点击进入 博客分类: android android应用连接跳转
程序员文章站
2024-03-14 22:31:23
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package com.example.likeqq; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import android.app.Activity; import android.content.Intent; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.os.Bundle; import android.view.View; import android.widget.Adapter; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView; import android.widget.SimpleAdapter; public class MainActivity extends Activity { ListView lv; SimpleAdapter adapter; ArrayList<HashMap<String, Object>> items = new ArrayList<HashMap<String, Object>>(); PackageManager pm; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); lv = (ListView) findViewById(R.id.listview); final PackageManager pm = getPackageManager(); // 得到PackageManager对象 List<PackageInfo> packs = pm .getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES); // 得到系统 安装的所有程序包的PackageInfo对象 for (PackageInfo pi : packs) { HashMap<String, Object> map = new HashMap<String, Object>(); map.put("icon", pi.applicationInfo.loadIcon(pm)); // 图标 map.put("appName", pi.applicationInfo.loadLabel(pm)); // 应用名 map.put("packageName", pi.packageName); // 包名 items.add(map); // 循环读取存到HashMap,再增加到ArrayList.一个HashMap就是一项 } adapter = new SimpleAdapter(this, items, R.layout.piitem, new String[] { "icon", "appName", "packageName" }, new int[] { R.id.icon, R.id.appName, R.id.packageName }); // 参数:Context,ArrayList(item的集合),item的layout,包含ArrayList中Hashmap的key的数组,key所对应的值相对应的控件id lv.setAdapter(adapter); lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // TODO Auto-generated method stub String packageName = (String) items.get(position).get( "packageName"); //取到点击的包名 Intent i = pm.getLaunchIntentForPackage(packageName); //如果该程序不可启动(像系统自带的包,有很多是没有入口的)会返回NULL if (i != null) startActivity(i); } }); } }
布局文件就不添加了,都是listView的基础布局