Android 获取内存信息

import java.io.BufferedReader; import java.io.FileReader;

import android.app.Activity; import android.app.ActivityManager; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.widget.TextView;

public class SystemInfo extends Activity { private TextView textView,textView2; ActivityManager am; ActivityManager.MemoryInfo memoryInfo; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.sysinfo); textView=(TextView) findViewById(R.id.sys_textView1); textView2=(TextView) findViewById(R.id.sys_textView2); am=(ActivityManager) getSystemService(ACTIVITY_SERVICE); memoryInfo=new ActivityManager.MemoryInfo(); am.getMemoryInfo(memoryInfo); textView2.setText("本机最大内存："+GetTotalMemory()+"M"); UpdateMemory Update=new UpdateMemory(); Update.start(); } class UpdateMemory extends Thread{ public void run() { while(true){ Message message=new Message(); //message.obj=GetAvailableMemory(memoryInfo.availMem); message.what=1; handler.sendMessage(message); try { Thread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } Handler handler=new Handler(){

public void handleMessage(Message msg) { // TODO Auto-generated method stub if (msg.what==1) { textView.setText("本机还有内存:"+GetAvailableMemory(memoryInfo.availMem)+"M"); } super.handleMessage(msg); } }; private Double GetTotalMemory(){ String str1 = "/proc/meminfo"; String str2; Double memory=0.0 ; try { FileReader r=new FileReader(str1); BufferedReader bufferedRead=new BufferedReader(r, 8192); str2=bufferedRead.readLine(); System.err.println("str2--------->"+str2); //arrayOfString = str2.split("//s+"); ///String str3=str2.trim(); //System.out.println("----------------------->"+str3); String str4=str2.substring(str2.length()-9, str2.length()-3); //System.out.println(str4+" "+str4.length()); memory=Double.parseDouble(str4)/1000; } catch (Exception e) { // TODO: handle exception } return memory; } private double GetAvailableMemory(long num) { double M; M=(num/1024)/1024; return M; } }