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Android Problem displaying message

Posted on 2013-12-02
Medium Priority
Last Modified: 2013-12-03
Hi. I have followed the instructions at the following link to display a message on a button
click in my first Android app but when I click the button, nothing happens.
Have I done something wrong? Thanks


package co.webexcel.myfirstapp;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.MenuItem;
import android.widget.TextView;

public class DisplayMessageActivity extends Activity {
      //Additionally, you must add the @SuppressLint("NewApi") tag to the
      //onCreate() method to avoid lint errors.
      protected void onCreate(Bundle savedInstanceState) {
            // Make sure we're running on Honeycomb or higher to use ActionBar APIs
          // Get the message from the intent
          Intent intent = getIntent();
          String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);

          // Create the text view
          TextView textView = new TextView(this);

          // Set the text view as the activity layout

       * Set up the {@link android.app.ActionBar}, if the API is available.
      private void setupActionBar() {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {

      //this handles the behavior for the action bar's Up behavior
      public boolean onOptionsItemSelected(MenuItem item) {
            switch (item.getItemId()) {
            case android.R.id.home:
                  // This ID represents the Home or Up button. In the case of this
                  // activity, the Up button is shown. Use NavUtils to allow users
                  // to navigate up one level in the application structure. For
                  // more details, see the Navigation pattern on Android Design:
                  // http://developer.android.com/design/patterns/navigation.html#up-vs-back
                  return true;
            return super.onOptionsItemSelected(item);

Question by:Murray Brown
  • 4
  • 4
LVL 17

Expert Comment

by:Chris Harte
ID: 39690712
You are calling the setContentView() method twice. Comment out the first one


You will want to set the content view after your have set the text view.

Author Comment

by:Murray Brown
ID: 39691733
Hi. Thanks, but still doesn't work
I get the following at the bottom of the screen
[2013-12-03 09:03:32 - MyFirstApp] Starting activity co.webexcel.myfirstapp.MainActivity on device 0009022458cf9f
[2013-12-03 09:03:33 - MyFirstApp] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=co.webexcel.myfirstapp/.MainActivity }
[2013-12-03 09:03:33 - MyFirstApp] ActivityManager: Warning: Activity not started, its current task has been brought to the front
LVL 17

Expert Comment

by:Chris Harte
ID: 39692410
That error message means it cannot start the activity MainActivity. Have you spelt it correctly and it is in the manifest xml?
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Author Comment

by:Murray Brown
ID: 39692576
Hi. The activity started this time by rebooting my machine

[2013-12-03 16:43:10 - MyFirstApp] Success!
[2013-12-03 16:43:10 - MyFirstApp] Starting activity co.webexcel.myfirstapp.MainActivity on device 0009022458cf9f
[2013-12-03 16:43:11 - MyFirstApp] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=co.webexcel.myfirstapp/.MainActivity }
LVL 17

Expert Comment

by:Chris Harte
ID: 39692605
So, is it working then?

Author Comment

by:Murray Brown
ID: 39692618
No, unfortunately not. Is it perhaps the type of phone I have? Is there any way I can debug on my computer or see what is happening there?
LVL 17

Accepted Solution

Chris Harte earned 2000 total points
ID: 39692673
If you are using the eclipse IDE, which you should be, with the android ADT


Then you can debug either through the Android Virtual Device Manager or on your connected device. Include the following line


before the point at which you wish to set a breakpoint.

As an aside, I could never get the examples on the android site working, so I used this as my main tutorial


Start at one and work your way through. A bit dated but nothing that is not solvable.

Author Closing Comment

by:Murray Brown
ID: 39692693
Thanks very much MunterMan. I appreciate the advice! I had already found other bugs in the few pages on that site that I had gone through

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