[Solved] how to use setText

BackwardsDown · by **BackwardsDown** » Thu Dec 20, 2007 9:34 pm

[Solved]

So, I am new to Android AND Java, so here is my entry to "the most easy question of the year" though it has been bugging me for a while now.

So I have created this TextView in my main.xml: (stripped from not-important info)

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Using xml Syntax Highlighting

<TextView id="@+id/answer"
                        android:layout_width="fill_parent"
                        android:layout_height="fill_parent" 
                        android:text="0"/>
Parsed in 0.001 seconds,  using GeSHi 1.0.8.4

Now I want to do this: (stripped source)

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public class Program extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        
        setContentView(R.layout.main);
 
        R.id.answer.setText("something");
    }
}
Parsed in 0.031 seconds,  using GeSHi 1.0.8.4

However, eclipse gives me this:

Cannot invoke setText(String) on the primitive type int

And I don't seem to get the meaning of this error. Does anyone has an idea?

plusminus · by **plusminus** » Thu Dec 20, 2007 9:47 pm

Hello BackwardsDown,

everyone starts somewhen, don't mind

Your thoughts were basically right. But remember that the R.java contains just the IDs of the XML-Layout stuff :!:

But you want to get the View associated with that ID.

This is the evolution of the final command:

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Using java Syntax Highlighting

// Just the ID of the View defined in XML is not pretty useful
int theIDOfWhatIWantToLoad = R.id.answer;
 
/* But if we pass it to findViewbyID it returns us the View
 * it is associated with.
 * (findViewbyID returns a Object of the Type 'View') */
View v = this.findViewbyID(R.id.answer);
 
/* We know that it is a specialized View(a TextView), 
 * because we defined it in the main.xml .
 * So we can cast it to TextView. */
TextView tv = (TextView)this.findViewbyID(R.id.answer);
// And set the Text it should show:
tv.setText("something");
 
// All in one line:
((TextView)this.findViewbyID(R.id.answer)).setText("something");
Parsed in 0.032 seconds,  using GeSHi 1.0.8.4

Feel free to ask further, if you still didn't understand (or sth. else)

Regards,
plusminus

BackwardsDown · by **BackwardsDown** » Fri Dec 21, 2007 12:01 am

Wauw, thanks for the very good explanation

. Today I started working on tutorial 2 and tried to create my own app for the first time. And now its finished

.

*proud*

plusminus · by **plusminus** » Fri Dec 21, 2007 12:26 am

Hello BackwardsDown,

no problem

Did I ever say that Android is awesome :?:

Also for beginners in my view.

Not many people can say, I can <rule> my own phone ^^

Regards,
plusminus

[Solved] how to use setText

[Solved] how to use setText

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