android 定时器
package com.android.timer;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import com.android.test.R;
public class TimerActivity extends Activity {
private static final String TAG ="TimerActivity" ;
public TextView mTimeview = null ;
public Button mStop = null ;
public boolean flag = true ;
public Button mStart = null ;
public Handler mHandler = new HanderTimer();
public Thread task = new Thread(new Mythread());
public int time =60;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.count_timer);
mTimeview = (TextView)findViewById(R.id.tx1);
mStop = (Button)findViewById(R.id.stop);
mStop.setOnClickListener(new OnClickListener(
) {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
flag = false ;
}
});
mStart = (Button)findViewById(R.id.start);
mStart.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
flag = true ;
if(!task.isAlive()){
task.start();
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
}
class Mythread implements Runnable{
@Override
public void run() {
try {
while (true) {
if(flag) {
Thread.sleep(1000);
time = time - 1;
mHandler.obtainMessage(0, "" + time).sendToTarget();
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
class HanderTimer extends Handler{
@Override
public void handleMessage(Message msg) {
Log.d("print", "handle");
mTimeview.setText(msg.obj.toString());
}
}
}