记安卓中倒计时代码

来源：互联网发布：网络维护公司编辑：程序博客网时间：2024/05/19 22:01
以30分钟为例写的一个倒计时：
直接上代码
public class MainActivity extends AppCompatActivity {    private int minute = 30;//这是分钟    private int second = 0;//这是分钟后面的秒数。这里是以30分钟为例的，所以，minute是30，second是0    private TextView timeView;    private Timer timer;    private TimerTask timerTask;    //这是接收回来处理的消息    private Handler handler = new Handler() {        public void handleMessage(Message msg) {            if (minute == 0) {                if (second == 0) {                    timeView.setText("Time out !");                    if (timer != null) {                        timer.cancel();                        timer = null;                    }                    if (timerTask != null) {                        timerTask = null;                    }                } else {                    second--;                    if (second >= 10) {                        timeView.setText("0" + minute + ":" + second);                    } else {                        timeView.setText("0" + minute + ":0" + second);                    }                }            } else {                if (second == 0) {                    second = 59;                    minute--;                    if (minute >= 10) {                        timeView.setText(minute + ":" + second);                    } else {                        timeView.setText("0" + minute + ":" + second);                    }                } else {                    second--;                    if (second >= 10) {                        if (minute >= 10) {                            timeView.setText(minute + ":" + second);                        } else {                            timeView.setText("0" + minute + ":" + second);                        }                    } else {                        if (minute >= 10) {                            timeView.setText(minute + ":0" + second);                        } else {                            timeView.setText("0" + minute + ":0" + second);                        }                    }                }            }        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        requestWindowFeature(Window.FEATURE_NO_TITLE);        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        timeView = (TextView) findViewById(R.id.tv);        timeView.setText(minute + ":" + second);        timerTask = new TimerTask() {            @Override            public void run() {                Message msg = new Message();                msg.what = 0;                handler.sendMessage(msg);            }        };        timer = new Timer();        timer.schedule(timerTask, 0, 1000);    }    @Override    protected void onDestroy() {        if (timer != null) {            timer.cancel();            timer = null;        }        if (timerTask != null) {            timerTask = null;        }        minute = -1;        second = -1;        super.onDestroy();    }    @Override    protected void onStart() {        super.onStart();    }    @Override    protected void onStop() {        super.onStop();    }    @Override    protected void onResume() {        super.onResume();    }    @Override    protected void onRestart() {        super.onRestart();    }    @Override    protected void onPause() {        super.onPause();    }}
ok，这就完成了
0 0