如何从java隐藏/显示TextView

Question

我的布局中有TextView.我想保持它隐藏,只想在按钮点击时看到一次,我该怎么办？我的观点如下.谢谢

        <TextView
            android:layout_marginBottom="16dp"
            android:layout_marginRight="8dp"
            android:id="@+id/textAuthorSign"
            android:layout_gravity="right"
            android:text="- ABJ Abdul Kalam"
            android:textStyle="italic"
            android:textSize="16sp"
            android:typeface="serif"
            android:visibility="invisible"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

谢谢

Answer 1

我想你想要一个切换(正如问题标题所述)

XML文件:

     <Button
         android:layout_height="wrap_content"
         android:layout_width="wrap_content"
         android:text="@string/self_destruct"
         android:onClick="hide" />

     <TextView
         android:layout_marginBottom="16dp"
         android:layout_marginRight="8dp"
         android:id="@+id/textAuthorSign"
         android:layout_gravity="right"
         android:text="- ABJ Abdul Kalam"
         android:textStyle="italic"
         android:textSize="16sp"
         android:visibility="invisible"
         android:typeface="serif"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" />

Java的:

 public void hide(View view) {

     TextView txtView = (TextView)findViewById(R.id.textAuthorSign);

     //Toggle
     if (txtView.getVisibility() == View.VISIBLE)
        txtView.setVisibility(View.INVISIBLE);
     else 
        txtView.setVisibility(View.VISIBLE);

     //If you want it only one time
     //txtView.setVisibility(View.VISIBLE);

 }

Answer 2

首先获取对textView的引用：

  TextView textView = (TextView)findViewById(R.id.textViewName);

然后

  textView.setVisibility(TextView.VISIBLE);