Android獲得全局進程信息以及進程使用的內存情況

Android獲得全部進程信息，並獲得該進程使用的內存情況。

package linuxidc.process;

import java.util.List;
import android.os.Bundle;
import android.os.Debug.MemoryInfo;
import android.widget.TextView;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.content.Context;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  TextView tv = (TextView) findViewById(R.id.textView);

  ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);

  String all = "";
  try {
   List<RunningAppProcessInfo> list = activityManager
     .getRunningAppProcesses();

   for (int i = 0; i < list.size(); i++) {
    RunningAppProcessInfo p = list.get(i);
   
    String info = "第 " + (i + 1) + " 個進程\n";
    info += "名稱:" + p.processName + "\n";
    info += "id:" + p.pid + "\n";
    info += "用戶id:" + p.uid + "\n";
    // 該進程使用的內存情況，MemoryInfo單位是KB
    int[] memoryPid = new int[] { p.pid };
    MemoryInfo[] memoryInfo = activityManager
      .getProcessMemoryInfo(memoryPid);
    // 進程內存使用情況，單位:MB
    int memSize = memoryInfo[0].dalvikPrivateDirty;
    String count = "";
    if (memSize < 1024)
     count = memSize + " KB";
    else
     count = memSize / 1024 + " MB";

    info += "使用的內存(dalvikPrivateDirty): " + count + "\n";
    info += "重要級:" + p.importance + "\n";

    all = all + info + "\n";
   }

  } catch (Exception e) {
   e.printStackTrace();
  }

  tv.setText(all);
 }
}

需要在AndroidManifest.xml添加權限：

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

MainActivity.java需要的activity_main.xml文件：

  <ScrollView  xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
       
    </ScrollView>

更多Android相關信息見Android 專題頁面 http://www.linuxidc.com/topicnews.aspx?tid=11