林具有TextView的设置为不可见/可见一些麻烦。

Im having some trouble with setting textview to invisible/visible.

basicly我希望这样一个开/关按钮被点击的时候。

basicly i want this to happen when an on/off button has been clicked.

我所做的是一种像

textview.setVisibility(TextView.VISIBLE);
textview.setVisibility(TextView.INVISIBLE);

当我尝试执行此emultor说，应用程序已经停止unexcpetedly

when i try executing this the emultor says that the app has stopped unexcpetedly

推荐答案

您从XML构建这样或编程？

Are you building this from XML or programmatically?

我想使它成为一个XML文件，然后在活动运行更改属性。一定要使用的setContentView（R.layout.main）; ，然后再尝试获得与 findViewById（...）TextView的。

I would make it with an XML file then when the Activity runs change the property. Be sure to use setContentView(R.layout.main); before you try to get the TextView with findViewById(...).

呼叫 .setVisibility（View.GONE）; 上的TextView将其隐藏

Call .setVisibility(View.GONE); on the TextView to hide it.

呼叫 .setVisibility（View.VISIBLE）; 来的TextView的表现出来。

Call .setVisibility(View.VISIBLE); to on the TextView to show it.

我有做这样的事情的一个例子。你可以看到code在这里：https://github.com/ethankhall/Morse-Messenger/blob/master/src/com/kopysoft/MorseMessenger/Translate.java

I have an example that does something like this. You can see the code here: https://github.com/ethankhall/Morse-Messenger/blob/master/src/com/kopysoft/MorseMessenger/Translate.java