android项目获得所有运行程序

package com.itheima.bean;

import android.graphics.drawable.Drawable;

public class TaskInfo {

private Drawable icon;
private String name;
private String size;
private boolean isUser;

public Drawable getIcon() {
return icon;
}

public void setIcon(Drawable icon) {
this.icon = icon;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getSize() {
return size;
}

public void setSize(String size) {
this.size = size;
}

public boolean isUser() {
return isUser;
}

public void setUser(boolean isUser) {
this.isUser = isUser;
}

@Override
public String toString() {
return "TaskInfo [name=" + name + ", size=" + size
+ ", isUser=" + isUser + "]";
}
}

package com.itheima.engine;

import java.util.ArrayList;
import java.util.List;

import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.graphics.drawable.Drawable;
import android.os.Debug.MemoryInfo;
import android.text.format.Formatter;

import com.itheima.bean.TaskInfo;
import com.itheima.superman.R;

public class TaskInfoProvider {
private static String packageName;

public static List<TaskInfo>getTaskInfo(Context context){
List<TaskInfo> list = new ArrayList<TaskInfo>();

ActivityManager am = (ActivityManager) context
.getSystemService(Context.ACTIVITY_SERVICE);
PackageManager pm = context.getPackageManager();
List<RunningAppProcessInfo> runningAppProcesses = am.getRunningAppProcesses();
for (RunningAppProcessInfo runningAppProcessInfo : runningAppProcesses) {
TaskInfo task = null;
try {
task = new TaskInfo();
packageName = runningAppProcessInfo.processName;
//得到图标
Drawable loadIcon = pm.getPackageInfo(packageName, 0).applicationInfo.loadIcon(pm);
task.setIcon(loadIcon);
//得到名称
task.setName(pm.getPackageInfo(packageName, 0).applicationInfo.loadLabel(pm).toString());
//是不是用户程序
int flag = pm.getPackageInfo(packageName, 0).applicationInfo.flags;
if((flag&ApplicationInfo.FLAG_SYSTEM)==0){
task.setUser(true);
}else{
task.setUser(false);
}
//得要程序占用运行内存
MemoryInfo processMemoryInfo = am.getProcessMemoryInfo(new int[]{runningAppProcessInfo.pid})[0];
String size = Formatter.formatFileSize(context, processMemoryInfo.getTotalPrivateDirty()*1024);
task.setSize(size);
} catch (NameNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
//系统中有些程序是用C语言写的没有图标和名字
task.setIcon(context.getResources().getDrawable(R.drawable.ic_launcher));
task.setName(packageName);
}
list.add(task);
}
return list;

}
}