Android實(shí)現(xiàn)倒計(jì)時(shí)30分鐘功能

更新時(shí)間：2017年05月15日 16:18:01 作者：莫子辰

這篇文章主要為大家詳細(xì)介紹了Android實(shí)現(xiàn)倒計(jì)時(shí)30分鐘功能，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

以30分鐘為例寫(xiě)的一個(gè)倒計(jì)時(shí)：
直接上代碼

public class MainActivity extends AppCompatActivity {

  private int minute = 30;//這是分鐘
  private int second = 0;//這是分鐘后面的秒數(shù)。這里是以30分鐘為例的，所以，minute是30，second是0
  private TextView timeView;
  private Timer timer;
  private TimerTask timerTask;
  //這是接收回來(lái)處理的消息
  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，這就完成了。

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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