Android中获得正在运行的程序和系统服务的方法

显示正在运行应用程序的工程代码如下：

 
package com.qin.ammp; 
 
import java.util.ArrayList; 
import java.util.Collections; 
import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 
 
import android.app.Activity; 
import android.app.ActivityManager; 
import android.content.Context; 
import android.content.Intent; 
import android.content.pm.ApplicationInfo; 
import android.content.pm.PackageInfo; 
import android.content.pm.PackageManager; 
import android.content.pm.PackageManager.NameNotFoundException; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ListView; 
import android.widget.TextView; 
import android.widget.AdapterView.OnItemClickListener; 
 
public class BrowseRunningAppActivity extends Activity { 
 
  private static String TAG = "BrowseRunningAppActivity"; 
 
  private ListView listview = null; 
 
  private List<RunningAppInfo> mlistAppInfo = null; 
  private TextView tvInfo = null ; 
   
  private PackageManager pm; 
 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.browse_app_list); 
 
    listview = (ListView) findViewById(R.id.listviewApp); 
    tvInfo = (TextView)findViewById(R.id.tvInfo) ; 
     
    mlistAppInfo = new ArrayList<RunningAppInfo>(); 
 
    // 查询某一特定进程的所有应用程序 
    Intent intent = getIntent(); 
    //是否查询某一特定pid的应用程序 
    int pid = intent.getIntExtra("EXTRA_PROCESS_ID", -1); 
     
    if ( pid != -1) { 
      //某一特定经常里所有正在运行的应用程序 
      mlistAppInfo =querySpecailPIDRunningAppInfo(intent, pid); 
    } 
    else{ 
      // 查询所有正在运行的应用程序信息： 包括他们所在的进程id和进程名 
      tvInfo.setText("所有正在运行的应用程序有-------"); 
      mlistAppInfo = queryAllRunningAppInfo();  
    } 
    BrowseRunningAppAdapter browseAppAdapter = new BrowseRunningAppAdapter(this, mlistAppInfo); 
    listview.setAdapter(browseAppAdapter); 
  } 
 
  // 查询所有正在运行的应用程序信息： 包括他们所在的进程id和进程名 
  // 这儿我直接获取了系统里安装的所有应用程序，然后根据报名pkgname过滤获取所有真正运行的应用程序 
  private List<RunningAppInfo> queryAllRunningAppInfo() { 
    pm = this.getPackageManager(); 
    // 查询所有已经安装的应用程序 
    List<ApplicationInfo> listAppcations = pm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES); 
    Collections.sort(listAppcations,new ApplicationInfo.DisplayNameComparator(pm));// 排序 
 
    // 保存所有正在运行的包名 以及它所在的进程信息 
    Map<String, ActivityManager.RunningAppProcessInfo> pgkProcessAppMap = new HashMap<String, ActivityManager.RunningAppProcessInfo>(); 
 
    ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); 
    // 通过调用ActivityManager的getRunningAppProcesses()方法获得系统里所有正在运行的进程 
    List<ActivityManager.RunningAppProcessInfo> appProcessList = mActivityManager 
        .getRunningAppProcesses(); 
 
    for (ActivityManager.RunningAppProcessInfo appProcess : appProcessList) { 
      int pid = appProcess.pid; // pid 
      String processName = appProcess.processName; // 进程名 
      Log.i(TAG, "processName: " + processName + " pid: " + pid); 
 
      String[] pkgNameList = appProcess.pkgList; // 获得运行在该进程里的所有应用程序包 
 
      // 输出所有应用程序的包名 
      for (int i = 0; i < pkgNameList.length; i++) { 
        String pkgName = pkgNameList[i]; 
        Log.i(TAG, "packageName " + pkgName + " at index " + i+ " in process " + pid); 
        // 加入至map对象里 
        pgkProcessAppMap.put(pkgName, appProcess); 
      } 
    } 
    // 保存所有正在运行的应用程序信息 
    List<RunningAppInfo> runningAppInfos = new ArrayList<RunningAppInfo>(); // 保存过滤查到的AppInfo 
 
    for (ApplicationInfo app : listAppcations) { 
      // 如果该包名存在 则构造一个RunningAppInfo对象 
      if (pgkProcessAppMap.containsKey(app.packageName)) { 
        // 获得该packageName的 pid 和 processName 
        int pid = pgkProcessAppMap.get(app.packageName).pid; 
        String processName = pgkProcessAppMap.get(app.packageName).processName; 
        runningAppInfos.add(getAppInfo(app, pid, processName)); 
      } 
    } 
 
    return runningAppInfos; 
 
  } 
  // 某一特定经常里所有正在运行的应用程序 
  private List<RunningAppInfo> querySpecailPIDRunningAppInfo(Intent intent , int pid) { 
 
 
    String[] pkgNameList = intent.getStringArrayExtra("EXTRA_PKGNAMELIST"); 
    String processName = intent.getStringExtra("EXTRA_PROCESS_NAME"); 
     
    //update ui 
    tvInfo.setText("进程id为"+pid +" 运行的应用程序共有 : "+pkgNameList.length); 
         
    pm = this.getPackageManager(); 
   
    // 保存所有正在运行的应用程序信息 
    List<RunningAppInfo> runningAppInfos = new ArrayList<RunningAppInfo>(); // 保存过滤查到的AppInfo 
 
    for(int i = 0 ; i<pkgNameList.length ;i++){ 
      //根据包名查询特定的ApplicationInfo对象 
      ApplicationInfo appInfo; 
     try { 
      appInfo = pm.getApplicationInfo(pkgNameList[i], 0); 
      runningAppInfos.add(getAppInfo(appInfo, pid, processName)); 
     } 
     catch (NameNotFoundException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } // 0代表没有任何标记; 
    } 
    return runningAppInfos ; 
  } 
   
   
  // 构造一个RunningAppInfo对象 ，并赋值 
  private RunningAppInfo getAppInfo(ApplicationInfo app, int pid, String processName) { 
    RunningAppInfo appInfo = new RunningAppInfo(); 
    appInfo.setAppLabel((String) app.loadLabel(pm)); 
    appInfo.setAppIcon(app.loadIcon(pm)); 
    appInfo.setPkgName(app.packageName); 
 
    appInfo.setPid(pid); 
    appInfo.setProcessName(processName); 
 
    return appInfo; 
  } 
} 
								 
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