Android开屏页倒计时功能实现的详细教程

  <FrameLayout
    android:id="@+id/start_skip"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true">

    <TextView
      android:id="@+id/start_skip_count_down"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_margin="@dimen/default_padding"
      android:text="@string/click_to_skip"
      android:gravity="center"
      android:background="@drawable/bg_start_page_circle"
      android:textColor="@android:color/white"
      android:textSize="14sp"
      />
  </FrameLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

  <solid android:color="#80000000"/>

  <padding
    android:bottom="3dp"
    android:left="8dp"
    android:right="8dp"
    android:top="3dp"/>

  <corners
    android:bottomLeftRadius="45dp"
    android:bottomRightRadius="45dp"
    android:topLeftRadius="45dp"
    android:topRightRadius="45dp"/>

</shape>

  private TextView mCountDownTextView;
 /**
   * Created by KeithXiaoY on 2017/06/07.
   */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    mCountDownTextView = (TextView) findViewById(R.id.start_skip_count_down);
  ｝

  class MyCountDownTimer extends CountDownTimer {
    /**
     * @param millisInFuture
     *   表示以「 毫秒 」为单位倒计时的总数
     *   例如 millisInFuture = 1000 表示1秒
     *
     * @param countDownInterval
     *   表示 间隔 多少微秒 调用一次 onTick()
     *   例如: countDownInterval = 1000 ; 表示每 1000 毫秒调用一次 onTick()
     *
     */

    public MyCountDownTimer(long millisInFuture, long countDownInterval) {
      super(millisInFuture, countDownInterval);
    }


    public void onFinish() {
      mCountDownTextView.setText("0s 跳过");
    }

    public void onTick(long millisUntilFinished) {
      mCountDownTextView.setText( millisUntilFinished / 1000 + "s 跳过");
    }

  }

  private TextView mCountDownTextView;
  private MyCountDownTimer mCountDownTimer;
 /**
   * Created by KeithXiaoY on 2017/06/07.
   */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    ...
    mCountDownTextView = (TextView) findViewById(R.id.start_skip_count_down);
      //我司需求，在没有 Banner 广告的时候一秒跳过开屏页，有 Banner 广告的时候三秒跳过
    if (PreferencesFactory.getCommonPref().getBoolean(CommonPreferences.PREFS_HAS_START_PAGE_BANNER, false)) {
      mCountDownTextView.setText("3s 跳过");
      //创建倒计时类
      mCountDownTimer = new MyCountDownTimer(3000, 1000);
      mCountDownTimer.start();
      //这是一个 Handler 里面的逻辑是从 Splash 界面跳转到 Main 界面，这里的逻辑每个公司基本上一致
      tmpHandler.postDelayed(runnable, 3000);
    } else {
      mCountDownTextView.setText("1s 跳过");
      mCountDownTimer = new MyCountDownTimer(1000, 1000);
      mCountDownTimer.start();
      tmpHandler.postDelayed(runnable, 1000);
    }
  ｝

  @Override
  protected void onDestroy() {
    if (mCountDownTimer != null) {
      mCountDownTimer.cancel();
    }
    super.onDestroy();
  }