Question

我想要在打开活动后以及点击栏中的项目显示按钮

后自动隐藏按钮

 @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int i = item.getItemId();
        Button bt_call = (Button) findViewById(R.id.bt_call);
        if (i == R.id.action_hide) {
            if(button1IsVisible==true)
            {
                bt_call.setVisibility(View.GONE);
                button1IsVisible = false;
            }
            else if(button1IsVisible==false)
            {
                bt_call.setVisibility(View.VISIBLE);
                button1IsVisible = true;
            }
        }

        return super.onOptionsItemSelected(item);

    }

}

Answer 1

当活动开始时设置按钮隐藏的可见性..

        button.setVisibility(View.GONE);

然后在操作栏的图标中点击监听器......

@Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {

            case R.id.action_other1:
 button1.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {

                           button.setVisibility(View.VISIBLE);
            }
        });

                break;
            default:

                break;
        }

        // Return false to allow normal menu processing to proceed,
        // true to consume it here.
        return false;
    }

Answer 2

正确检查特定按钮的可见性，然后显示/隐藏。以下是一个示例：

if (bt_call.getVisibility() == View.VISIBLE) {
   bt_call.setVisibility(View.GONE);
} else {
   bt_call.setVisibility(View.VISIBLE);
}

注意：声明按钮Globally，而不是点击事件！

Answer 3

我想在打开活动后点击项目后自动隐藏按钮 ation bar show button

首先，您需要将bt_call设置为onCreate方法中不可见的内容，例如@Devyani Kotadiya所说的

Button bt_call;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.your_activity_xml); 
    bt_call= (Button) findViewById(R.id.bt_call);
    bt_call.setVisibility(View.INVISIBLE);
 }

然后实现如下

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_hide:
            if (button1IsVisible.getVisibility() == View.VISIBLE)
            {
                bt_call.setVisibility(View.INVISIBLE);
            }
            else
                bt_call.setVisibility(View.VISIBLE);

                break;
        }
        return super.onOptionsItemSelected(item);
    }

打开活动后如何自动隐藏按钮？

3 个答案: