CountDownTimer实现按钮倒计时

activity_splash.xml中进行布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/launch_bg"
    tools:context=".activity.SplashActivity">

    <Button
        android:id="@+id/btn_skip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="跳过"
        android:textColor="#FFFFFF"
        android:textStyle="bold"
        android:textSize="18sp"
        android:background="@drawable/btn_skip"
        android:layout_marginBottom="70dp"/>

</RelativeLayout>

CountDownTimer(5*1000,1000) 第一个参数是总时间，第二个参数是时间间隔，单位为毫秒

public class SplashActivity extends AppCompatActivity {

    private Button btn_skip;
    CountDownTimer timer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash);
        init();
    }

    private void init() {
        //初始化布局
        btn_skip = (Button)findViewById(R.id.btn_skip);

       timer = new CountDownTimer(5*1000,1000) {
           @Override
           public void onTick(long l) {//计时过程显示
//               btn_skip.setText((l/1000+1) + "秒");
           }

           @Override
           public void onFinish() {  //计时完毕时触发
               //界面跳转
                Intent intent = new Intent(SplashActivity.this,MainActivity.class);
                startActivity(intent);
                //关闭SplashActivity
                SplashActivity.this.finish();
           }

       }.start();

        btn_skip.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //界面跳转
                Intent intent = new Intent(SplashActivity.this,MainActivity.class);
                startActivity(intent);
                //关闭SplashActivity
                SplashActivity.this.finish();
            }
        });

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

}