android on eclipse wont run hello world

Question

I am trying to set up an eclipse environment on windows 64. I think I have done everything in the tutorial (developer.android.com) but when I select the project in eclipse to run i get the emulator to pop up but it doesn't show hello world.

I tried android version 2.1 and the emulator poped up and just eventual went to a black screen after showing ANDROID...

I tried as 4.0.3 and after the emulator popped up I just saw a plane jane android phone interface it wouldn't run my app. The code is below. Does anyone know what i am missing?

Eclipse displays the following when I run the emulator

[2012-02-19 11:58:40 - trst] ------------------------------
[2012-02-19 11:58:40 - trst] Android Launch!
[2012-02-19 11:58:40 - trst] adb is running normally.
[2012-02-19 11:58:40 - trst] Performing com.example.helloandroid.TrstActivity activity launch
[2012-02-19 11:58:40 - trst] Automatic Target Mode: launching new emulator with compatible AVD 'interface'
[2012-02-19 11:58:40 - trst] Launching a new emulator with Virtual Device 'interface'
[2012-02-19 11:58:55 - Emulator] emulator: WARNING: Unable to create sensors port: Unknown error
[2012-02-19 11:58:55 - trst] New emulator found: emulator-5554
[2012-02-19 11:58:55 - trst] Waiting for HOME ('android.process.acore') to be launched...

code:

package com.example.helloandroid;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class TrstActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        TextView tv = new TextView(this);
        tv.setText("Hello, Android");
        setContentView(tv);
    }
}

score 1 · Answer 1 · answered Jun 19 '12 at 11:09

I just would like to add that I saw the Android screen and it did nothing for at least 2 minutes and I thought my application had crashed also. But actually I think this was just the virtual device booting up.

After two or three minutes, the Android log was replaced by a login/splash screen - once I clicked on unlock ... I finally saw my "hello world" message .... what relief !!!!

score 0 · Answer 2 · edited Mar 13 '13 at 09:25

0

I restarted Eclipse,opened the main activity.java file in src folder,changed the string to hello android and ran the code. It pops out an error saying: no such file/string found. Then I renamed it back to hello_world and ran and it worked.

edited Mar 13 '13 at 09:25

tostao

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answered Mar 13 '13 at 09:00

Venkatesh

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This is suppose to be a comment. – Ariel Magbanua Mar 13 '13 at 09:23

score 0 · Answer 3 · edited May 23 '17 at 11:48

0

Apparent solution may be just try clicking on back button of emulator. (as I couldn't find any other mistake in your code)
Also please paste Logcat so that we can identify exact cause.

edited May 23 '17 at 11:48

Community

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answered Feb 19 '12 at 17:34

Ajinkya

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so i run logcat from the command prompt correct? where would i run it from? – user1219505 Feb 19 '12 at 20:15
Please check this http://stackoverflow.com/questions/3280051/how-to-enable-logcat-console-in-eclipse-for-android – Ajinkya Feb 20 '12 at 08:01

score 0 · Answer 4 · answered Feb 19 '12 at 17:38

0

Does console give you anything in the logs about why it doesn't run? I've never used setContentView(int) like that. I've always used it with a layout like R.layout.hello (or whatever you have here) and then you can reference the TextView like this

TextView mTextView = findViewById(R.id.myTextView);
mTextView.setText("Hello, Android!");

Hope this helps.

answered Feb 19 '12 at 17:38

Daniel Lockard

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You can pass a TextView to setContentView() method. – Ajinkya Feb 19 '12 at 18:00
TIL. I'm far more of a sysadmin than a programmer. I don't know why you'd want to do it that way, though. – Daniel Lockard Feb 19 '12 at 18:11
May be because it is a hello world program and OP want to keep it as simple as possible. – Ajinkya Feb 19 '12 at 18:13

score 0 · Answer 5 · answered Feb 20 '12 at 00:49

0

You may have the same issue I did when I first started, the emulator takes quite a while to start up, give it 5-10 minutes and if it still fails, you will need to show us the logcat.

answered Feb 20 '12 at 00:49

jersam515

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android on eclipse wont run hello world

5 Answers5