获取系统内存显示程序

获取系统内存首先要获得系统活动管理器

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

再获取内存信息

ActivityManager.MemoryInfo memoryInfo =new ActivityManager.MemoryInfo();  

程序如下：

public class MainActivity extends Activity {
private Handler mHandler = null;

          private TextView textview = null;

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

mHandler = new Handler() {

@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
// super.handleMessage(msg);

String show = "已使用：" + getUnusedMemmory() + "M";
System.out.println("xxxzx");
textview.setText(show + "\n" + textview.getText());
// mHandler.postDelayed(new MemmoryRunnable(), 2500);
}
};

textview = (TextView) findViewById(R.id.text_view);

textview.setMovementMethod(ScrollingMovementMethod.getInstance());

//启动线程

new Thread(new MemmoryRunnable()).start();

}

//取得剩余内存信息

private long getUnusedMemmory() {
long unused = 0;

ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
manager.getMemoryInfo(mi);

           //获取剩余内存转化为M
unused = mi.availMem / (1024 * 1024);

return unused;
}

//多线程接口函数

private boolean isRunning = true;

 private class MemoryRunnable implements Runnable{

  public   void run(){

  while (isRunning){

mHandler.sendEmptyMessage(0);
System.out.println("memmory");
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}

}

}