java - 如何让按钮隐藏 3 秒？

Question

我检查了此链接:1- How to show a button after 5 seconds in android studio?

2- How make a button invisible for 1 or 2 second on another button click

但是我无法理解这个处理程序应该在我的代码中的什么位置。我尝试过但没有成功。 “当你回家时听到一声尖叫”在这条文字之后我想让我的按钮可见。我希望我能表达自己。

这是我的代码:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);
    final TypeWriter tw = (TypeWriter) findViewById(R.id.tv);

            tw.setText("");
            tw.SetCharacterDelay(120);
            tw.animatedText("While u r going to home heard a scream ")






    Button btn2 = (Button)   findViewById(R.id.button3);
    btn2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent c = new Intent(Main2Activity.this,Main3Activity.class);
            startActivity(c);
        }
    });



}


}

Answer 1

试试这个。

Button btn2 = (Button)   findViewById(R.id.button3);

final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        //Do something after 3 secs
    }
}, 3000);