使用ActivityManager实现进程管理

来源：互联网发布：淘宝月饼推荐编辑：程序博客网时间：2024/05/10 07:01

Android中使用ActivityManager可以获得进程信息，并对进程进行管理，如结束进程等。本文使用ActivityManager获得进程列表，并结束选中的进程。

首先，看看布局文件。

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<?xml version="1.0"encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
 
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:layout_weight="5">
 
        <TextView
            android:id="@+id/textView1"
            style="@style/my_style"
            android:layout_width="match_parent"
            android:layout_height="fill_parent"
            android:layout_weight="3"/>
 
        <TextView
            android:id="@+id/textView2"
            style="@style/my_style"
            android:layout_width="match_parent"
            android:layout_height="fill_parent"
            android:layout_gravity="center_vertical|center_horizontal"
            android:layout_weight="3"
            android:gravity="center_vertical|center_horizontal"
            android:text="进程号"/>
 
        <TextView
            android:id="@+id/textView3"
            style="@style/my_style"
            android:layout_width="match_parent"
            android:layout_height="fill_parent"
            android:layout_weight="2"
            android:gravity="center_vertical|center_horizontal"
            android:text="进程名"/>
         
        <TextView
            android:id="@+id/textView4"
            style="@style/my_style"
            android:layout_width="match_parent"
            android:layout_height="fill_parent"
            android:layout_weight="3"
            android:gravity="center_vertical|center_horizontal"
            android:text="内存"/>
 
    </LinearLayout>
     
    <ListView
        android:id="@id/android:list"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:layout_weight="1">
 
    </ListView>
 
    <Button
        android:id="@+id/btn_pro"
        style="@style/my_style"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:layout_weight="5"
        android:text="结束"/>
 
</LinearLayout>

然后是Java文件。

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package com.hzhi.sysinfor;
 
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
import android.app.ActivityManager;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Debug;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
 
public class process extendsListActivity{
     
    Button btn_stop;
    PackageManager pkg_man;
    list_pro list_ada;
    ActivityManager am;
     
    // 获得所有的进程列表
    publicvoid get_pro(){ 
         
        list_ada =new list_pro(this);
         
        // 包管理器
        am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        // 获取手机内所有应用
        List<ActivityManager.RunningAppProcessInfo> pi = am.getRunningAppProcesses();
         
        for(int i=0; i<pi.size(); i++){
             
            ActivityManager.RunningAppProcessInfo pii =
                    (ActivityManager.RunningAppProcessInfo) pi.get(i);
             
            int[] mem =new int[] {pii.pid};
            Debug.MemoryInfo[] mi = am.getProcessMemoryInfo(mem);
             
            list_ada.addItem(String.valueOf(pii.pid),
                    pii.processName,
                    String.valueOf(mi[0].dalvikPrivateDirty) +"KB",
                    false);        
             
        }
         
        setListAdapter(list_ada);
         
    }
     
    @Override
    protectedvoid onCreate(Bundle savedInstanceState) {
         
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list_process);
         
        get_pro();
 
         
        btn_stop = (Button) findViewById(R.id.btn_pro);
        btn_stop.setOnClickListener(newView.OnClickListener() {
             
            @Override
            publicvoid onClick(View v) {
 
                for(int j=0; j<list_ada.list_data.size(); j++){
                     
                    // 该应用需要删除
                    if(list_ada.list_data.get(j).is_chk){                     
                         
                        String name = (String)
                                list_ada.list_data.get(j).txt_name.getText();
                        finalString pro = (String) 
                                list_ada.list_data.get(j).txt_name.getText();
                         
                        newAlertDialog.Builder(process.this)
                        .setTitle("结束进程")
                        .setMessage("确定结束"+ name + "吗?")
                        .setPositiveButton("是",new DialogInterface.OnClickListener() {
 
                            @Override
                            publicvoid onClick(DialogInterface arg0,int arg1) {
                                unload(pro);
                                get_pro();
                            }
 
                        })
                        .setNegativeButton("否",null)
                        .show();
                    }
                     
                }
                 
            }
        });
 
    }
     
    @Override
    publicboolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        returntrue;
    }
     
    publicboolean unload (String n){
         
        booleanres = true;
         
        am.killBackgroundProcesses(n);
        Toast.makeText(process.this,"进程" + n + "已经结束!", Toast.LENGTH_LONG)
        .show();
         
        returnres;
         
    }
 
}
 
// pro列表
classlist_pro extendsBaseAdapter implementsOnClickListener{
   
    publicContext ctx;
    publicList<item_pro> list_data;
   
    publiclist_pro(Context context){
       
        ctx = context;
        list_data =new ArrayList<item_pro>();
       
    }
 
    @Override
    publicint getCount() {
        // TODO Auto-generated method stub
        returnlist_data.size();
    }
 
    @Override
    publicObject getItem(intarg0) {
     // TODO Auto-generated method stub
     returnlist_data.get(arg0);
    }
 
    @Override
    publiclong getItemId(intarg0) {
     // TODO Auto-generated method stub
     returnlist_data.indexOf(arg0);
    }
 
    @Override
    publicView getView(intposition, View convertView, ViewGroup parent) {
 
        item_pro my_item;
        Integer i =0;
       
        if(convertView == null)
        { 
            my_item =new item_pro(ctx,
                 (String)list_data.get(position).txt_no.getText(),
                 (String)list_data.get(position).txt_name.getText(),
                 (String)list_data.get(position).txt_size.getText(),
                 list_data.get(position).is_chk);
        }
        else
        { 
            my_item = (item_pro)convertView; 
            my_item.txt_no.setText(list_data.get(position).txt_no.getText());
            my_item.txt_name.setText(list_data.get(position).txt_name.getText());
            my_item.txt_size.setText(list_data.get(position).txt_size.getText());
        }
         
        CheckBox chk_item = (CheckBox) my_item.chk_pro;
        chk_item.setOnClickListener(this); 
        chk_item.setChecked(list_data.get(position).is_chk);
        chk_item.setTag(position);
 
        returnmy_item; 
   
    }
   
    publicvoid addItem(String txt_no, String txt_name,
            String str_size, Boolean bol_chk)
    { 
        list_data.add(newitem_pro(ctx,txt_no,txt_name,str_size,bol_chk));                
    }
 
    @Override
    publicvoid onClick(View v) {
        // TODO Auto-generated method stub
        CheckBox c = (CheckBox) v;
        intpos = Integer.parseInt(v.getTag().toString());
        list_data.get(pos).is_chk = c.isChecked();     
    }
   
}
 
// pro列表的一行
classitem_pro extendsLinearLayout{
     
    publicCheckBox chk_pro;
    // 进程号
    publicTextView txt_no;
    // 进程名
    publicTextView txt_name; 
    // 占用内存大小
    publicTextView txt_size;
    // 是否选中
    publicboolean is_chk;
      
    publicitem_pro(Context ctx, String str_no, String str_name, 
            String str_size, Boolean bol_chk)
    {       
        super(ctx);
        this.setOrientation(HORIZONTAL);       
         
        inthei = 80;
         
        chk_pro =new CheckBox(ctx);
        addView(chk_pro,
                newLinearLayout.LayoutParams((int)(MainActivity.wid_scr*0.2),hei));       
          
        txt_no =new TextView(ctx);
        txt_no.setText(str_no);
        addView(txt_no,
                newLinearLayout.LayoutParams((int)(MainActivity.wid_scr*0.2),hei));
         
        txt_name =new TextView(ctx);
        txt_name.setText(str_name);
        addView(txt_name,
                newLinearLayout.LayoutParams((int)(MainActivity.wid_scr*0.4),hei));
         
        txt_size =new TextView(ctx);
        txt_size.setText(str_size);
        addView(txt_size,
                newLinearLayout.LayoutParams((int)(MainActivity.wid_scr*0.2),hei));
 
        is_chk = bol_chk;
          
     }
 
}

Java文件实现了三个类。process类是整个Activity的类，list_pro是适配器类，item_pro是列表里面的一行。
在process类的get_pro()方法里面，语句am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE)获得了一个ActivityManager，List<ActivityManager.RunningAppProcessInfo> pi = am.getRunningAppProcesses()获得了系统的所有进程，并存储在列表pi里面。语句ActivityManager.RunningAppProcessInfo pii = (ActivityManager.RunningAppProcessInfo) pi.get(i)获得了每一个进程信息，pii.processName是该进程的进程名（通常是该进程对应的包名），mi[0].dalvikPrivateDirty是该进程占用的内存大小（通常以KB为单位）。在unload (String n)方法里面，am.killBackgroundProcesses(n)结束了进程名为n的进程，不过要在AndroidManifest.xml中加入android.permission.KILL_BACKGROUND_PROCESSES权限，否则会出现权限错误。

运行效果如下。

需要注意的是，系统进程是不能结束的。

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