Android 定时获取系统内存信息

package com.status;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

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

public class main extends Activity {
    /** Called when the activity is first created. */
	private final Timer timer = new Timer();
	private TimerTask task;
	Handler handler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			// TODO Auto-generated method stub
			//要做的事情
			getTotalMemory();
		super.handleMessage(msg);
		}

	};
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);        
        init();
    }
    private void init(){
    	task = new TimerTask() {
    		@Override
    		public void run() {
    			// TODO Auto-generated method stub
	    		Message message = new Message();
	    		message.what = 1;
	    		handler.sendMessage(message);
    		}
    	};
    	timer.schedule(task, 2000, 2000);
    }
    
    public void getTotalMemory() {  
    	TextView tv=(TextView)findViewById(R.id.textView1);
        String str1 = "/proc/meminfo";  
        String str2="";
        String retStr=""; 
        try {  
            FileReader fr = new FileReader(str1);  
            BufferedReader localBufferedReader = new BufferedReader(fr, 8192);  
            while ((str2 = localBufferedReader.readLine()) != null) {  
                //Log.i(TAG, "---" + str2);  
            	retStr+=str2+"\r\n";
            }  
            tv.setText(retStr);
        } catch (IOException e) {  
        }  
    }  
}