页面倒计时跳转

public class MainActivity extends AppCompatActivity {

    private TextView text;
    private int Time=4;
    private Handler mhandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if(msg.what==1){
                if(Time>1){
                    Time--;
                    text.setText(Time+"s");
                    mhandler.sendEmptyMessageDelayed(1,1000);
                }else{
                    gohome();
                }
            }
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //获取控件
        text = findViewById(R.id.text);
        //发送Handler消息
        mhandler.sendEmptyMessageDelayed(1,1000);
    }
    private void gohome(){
        //得到意图对象
        Intent intent = new Intent(MainActivity.this, ShowActivity.class);
        //跳转页面
        startActivity(intent);
        //销毁
        finish();
    }
}