Problem:String array set on TextView

Question

I want to change text from the textview when I was click the next button. I have try this code but could not get right direction. would you please fix it.

public class StringTestActivity extends ListActivity {
TextView t;
int count=0;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    t=(TextView)findViewById(R.id.text);

    Resources res = this.getResources();
    final String[] capital = res.getStringArray(R.array.Cap);

       //ArrayAdapter<String> n=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,capital);
       //setListAdapter(n);
    Button next=(Button)findViewById(R.id.btnNext);
    next.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            if(count<capital.length-1)
            t.setText(capital[count]);
            count++;
        }

    });

} }

Edit: I have faced this error message. enter image description here

again edited: main.xml

<?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical" android:layout_width="fill_parent"
   android:layout_height="fill_parent">

   <TextView android:id="@+id/list" android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:hint="text" />

   <Button android:text="Next" android:id="@+id/btnNext"
 android:layout_width="wrap_content" android:layout_height="wrap_content">   </Button>        

</LinearLayout>

res/string/array.xml

  <?xml version="1.0" encoding="utf-8"?>
 <resources>
  <string-array name="Cap">
    <item>A</item>
    <item>B</item>
    <item>C</item>
    <item>D</item>
  </string-array>
 </resources>

what u r getting wrong ? will u elaborate what problem u r getting? — Android Killer, Sep 08 '11 at 06:28
when I run this project, above message was display(sorry.....). any thing wrong my code. — Horrorgoogle, Sep 08 '11 at 06:45
Provide us the error messages u r getting in your logcat. Not his image. — Android Killer, Sep 08 '11 at 06:51
java.lang.RuntimeException: Unable to start activity ComponentInfo{a.b/a.b.StringTestActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' — Horrorgoogle, Sep 08 '11 at 06:53
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/3264/discussion-between-kshetri-horrorgoogle-and-android-power) — Horrorgoogle, Sep 08 '11 at 07:49

score 2 · Answer 1 · answered Sep 08 '11 at 06:53

Button btn1;
 String countires[];
 int i=0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.prob2);

    btn1 = (Button) findViewById(R.id.prob2_btn1);

    countires = getResources().getStringArray(R.array.country);

    for (String string : countires)
    {
        Log.i("--: VALUE :--","string = "+string);
    }

    btn1.setOnClickListener(new OnClickListener()
    {
        @Override
        public void onClick(View arg0)
        {
            // TODO Auto-generated method stub
            String  country  = countires[i];
            btn1.setText(country);
            i++;
            if(i==countires.length)
                i=0;
        }
    });
}

score 1 · Answer 2 · answered Sep 08 '11 at 06:26

1

@Override
        public void onClick(View v) {
            t.setText(capital[count]);
            count++;
            count=count%capital.length;
        }

answered Sep 08 '11 at 06:26

Rasel

15,499
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use t=(TextView)findViewById(R.id.list); – Rasel Sep 08 '11 at 07:32

score 1 · Answer 3 · answered Sep 08 '11 at 06:30

1

Your code looks ok, what do you mean by "could not get right direction"? Does it crash with an exception, does the code never change?

By the way, considering your button is called next, you may want to rewrite it like this:

    Override
    public void onClick(View v) {
        count++;
        if( count < capital.length ) // no - 1
        {
            t.setText(capital[count]);
        } else {
            /* perhaps v.setEnabled(false); ? */
        }
    }

answered Sep 08 '11 at 06:30

K-ballo

80,396
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I try already this capital.length that not ok . tell me something more. – Horrorgoogle Sep 08 '11 at 06:38
Are you sure the Force Close comes from that code? How about posting the logs, instead of just a picture? – K-ballo Sep 08 '11 at 06:45
09-08 12:25:21.420: ERROR/AndroidRuntime(13400): java.lang.RuntimeException: Unable to start activity ComponentInfo{a.b/a.b.StringTestActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' – Horrorgoogle Sep 08 '11 at 06:49
Well, that has nothing to do with the code you posted. The exception you are getting is because "Your content must have a ListView whose id attribute is 'android.R.id.list'". Check your layout (R.layout.main) and ensure there is a ListView item named @android:id/list. – K-ballo Sep 08 '11 at 06:56

Android Killer · Accepted Answer · 2011-09-08T07:24:29.133

1

If you are not using ListView then implement Activity not ListActivity. So make this change

public class StringTestActivity extends Activity {

Also import android.app.Activity

edited Sep 08 '11 at 07:24

answered Sep 08 '11 at 06:55

Android Killer

18,174
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I got error on line>>> t=(TextView)findViewById(R.id.list); on **list**. – Horrorgoogle Sep 08 '11 at 07:11
Would you please give some idea behind this problem: http://stackoverflow.com/questions/7332112/how-to-make-horizontal-scrolling-view-in-android – Horrorgoogle Sep 08 '11 at 07:51

Problem:String array set on TextView

4 Answers4