CODEWITHSUNDEEP
javaandroid
yogi
yogi

Reputation: 1367

Android development toggling TextView visibility

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

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

what i did is kind of like

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

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

Upvotes: 13

Views: 54835

Answers (3)

Ethan
Ethan

Reputation: 6913

Are you building this from XML or programmatically?

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(...).

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

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

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

Upvotes: 34

Todd Davies
Todd Davies

Reputation: 5522

Without more code or a stack trace, it's hard to say, but it sounds like you haven't initialized the text view. Here's how to do it:

TextView myTextView = (TextView) findViewById(R.id.tv_text);

Where 'tv_text' is the id of the textview as defined in the xml layout file.

Hope that helped!

Upvotes: 2

mibollma
mibollma

Reputation: 15108

Read about DDMS and logcat to obtain a stacktrace and to see what the problem is: http://developer.android.com/guide/developing/debugging/debugging-projects.html

This is what you are looking for: enter image description here

Upvotes: 1

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