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1,计时器实现代码
public class MainActivity extends Activity implements OnClickListener{ private EditText inputet; private Button getTime,startTime,stopTime; private TextView time; private int i = 0; private Timer timer = null; private TimerTask task = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView(){ inputet = (EditText) findViewById(R.id.inputtime); getTime = (Button) findViewById(R.id.gettime); startTime = (Button) findViewById(R.id.starttime); stopTime = (Button) findViewById(R.id.stoptime); time = (TextView) findViewById(R.id.time); getTime.setOnClickListener(this); startTime.setOnClickListener(this); stopTime.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.gettime: time.setText(inputet.getText().toString()); i = Integer.parseInt(inputet.getText().toString()); break; case R.id.starttime: startTime(); break; case R.id.stoptime: stopTime(); break; } } private Handler mHandler = new Handler(){ public void handleMessage(Message msg) { time.setText(msg.arg1+""); startTime(); }; }; public void startTime(){ timer = new Timer(); task = new TimerTask() { @Override public void run() { i--; Message message = mHandler.obtainMessage(); message.arg1 = i; mHandler.sendMessage(message); } }; timer.schedule(task, 1000); } public void stopTime(){ timer.cancel(); } }
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原文地址:http://my.oschina.net/u/2480757/blog/516875