android实现获取正在运行的应用程序

package andorid.tasks;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.SimpleAdapter.ViewBinder;
public class ManagerTasksActivity extends Activity {
private ListView listView;
private PackageManager pm;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.task_main);
pm= this.getPackageManager();//获得包管理器
listView=(ListView)findViewById(R.id.list_view);
LoadList(this);//加载listview
}
private void LoadList(Context context)
{
ArrayList<HashMap<String, Object>> list=new ArrayList<HashMap<String, Object>>();
try{
ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE); //获得ActivityManager对象
List<RunningAppProcessInfo> runningTasks = am.getRunningAppProcesses(); //获得所有正在进行的程序存放在一个list中
for(int i=0;i<runningTasks.size();i++)
{
PackageInfo pInfo=new PackageInfo(context);//获得PackageInfo对象
//get application which is not in system and the usually
//如果是非系统应用程序以及一些常用的应用程序就加到list中
if((pInfo.getInfo(runningTasks.get(i).processName).flags&pInfo.getInfo(runningTasks.get(i).processName).FLAG_SYSTEM)==0
||(runningTasks.get(i).processName).equals("com.android.contacts")
||(runningTasks.get(i).processName).equals("com.android.email")
||(runningTasks.get(i).processName).equals("com.android.settings")
||(runningTasks.get(i).processName).equals("com.android.music")
||(runningTasks.get(i).processName).equals("com.android.calendar")
||(runningTasks.get(i).processName).equals("com.android.calculator2")
||(runningTasks.get(i).processName).equals("com.android.browser")
||(runningTasks.get(i).processName).equals("com.android.camera")
||(runningTasks.get(i).processName).equals("com.cooliris.media")
||(runningTasks.get(i).processName).equals("com.android.bluetooth")
||(runningTasks.get(i).processName).equals("com.android.mms"))
{
String dir = pInfo.getInfo(runningTasks.get(i).processName).publicSourceDir;
Float size=Float.valueOf((float) ((new File(dir).length()*1.0)));//获得应用程序的大小如果size大于一M就用M为单位，否则用KB
//long date = new Date(new File(dir).lastModified()).getTime();
//System.out.println(pInfo.getInfo(runningTasks.get(i).processName).loadIcon(pm));
HashMap<String, Object> map=new HashMap<String, Object>();
map.put("icon", pInfo.getInfo(runningTasks.get(i).processName).loadIcon(pm));
map.put("name", pInfo.getInfo(runningTasks.get(i).processName).loadLabel(pm));
if(size>1024*1024)
map.put("info", size/1024/1024+" MB");
else
map.put("info", size/1024+" KB");
map.put("packagename", runningTasks.get(i).processName.toString());//获得包名给后面用
list.add(map);
}
}
}catch(Exception ex)
{}
SimpleAdapter listadapter=new SimpleAdapter(this, list, R.layout.task_list, new String[]{"icon","name","info"}, new int []{R.id.icon,R.id.name,R.id.info});
listView.setAdapter(listadapter);//listview加载识别器
//下面这个方法主要是用来刷新图片，因为pInfo.getInfo(runningTasks.get(i).processName).loadIcon(pm)获得图片不能被显示出
listadapter.setViewBinder(new ViewBinder(){
public boolean setViewValue(View view,Object data,String textRepresentation){
if(view instanceof ImageView && data instanceof Drawable){
ImageView iv=(ImageView)view;
iv.setImageDrawable((Drawable)data);
return true;
}
else
return false;
}
});
//为listView添加item的点击事件
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
//get the item of the list to a hashmap
HashMap<?, ?> map=(HashMap<?, ?>)parent.getItemAtPosition(position);
//get package name from map
String packageName=(String) map.get("packagename");//从前面的map中获得包名
//if we onclick the item then start the application
//根据包名打开应用程序
Intent intent=new Intent();
intent =pm.getLaunchIntentForPackage(packageName);
startActivity(intent);
finish();//打开应用程序之后注销本应用程序
}
});
//为listview的item添加长按事件
listView.setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
final HashMap<?, ?> long_map=(HashMap<?, ?>)parent.getItemAtPosition(position);
new AlertDialog.Builder(ManagerTasksActivity.this).setTitle("Are you sure close")
.setPositiveButton("sure", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ActivityManager am = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
String packageName=(String)long_map.get("packagename");
//base packagename to kill appliction
//根据包名杀死应用程序
am.killBackgroundProcesses(packageName);
//refash list
//刷新listview
LoadList(ManagerTasksActivity.this);
}
}).setNegativeButton("cancle", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).show();
return false;
}
});
}
}
//类PackageInfo主要包括ApplicationInfo getInfo(String name)方法
class PackageInfo {
private List<ApplicationInfo> appList;
public PackageInfo(Context context){
//get all package data
PackageManager pm = context.getApplicationContext().getPackageManager();
appList = pm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES);
}
public ApplicationInfo getInfo(String name){
if(name == null){
return null;
}
for(ApplicationInfo appInfo : appList){
if(name.equals(appInfo.processName)){
return appInfo;
}
}
return null;
}
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<ImageView
android:id="@+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:layout_width="40dip"
android:layout_height="40dip"
/>
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
/>
<TextView
android:id="@+id/info"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/list_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
></ListView>
</LinearLayout>

<uses-permission android:name="android.permission.RESTART_PACKAGES" />