When Start running Android Hello world project, the eclipse launches emulator, but seems hello world project was not running, the emulator showed "Android" in the middle of the scrren, I tried Android 2.2 emulator, I heard some people opens emulator first then run the project, Havn't tried that yet. is that a correct way?
The Android emulator is slow. So be patient and eventually it will show you a home screen and your project will run.
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Every time if I want to run RN project I want to start an android studio and start the emulator manually and then go to the terminal and run the RN. if i run the project without starting an emulator it's giving me an error.
error I got when I run the project without starting an emulaotr
from my experience this is expected behavior. On Mac, running an iOS project is able to open the built in emulator, but never on Android. The error is just letting you know there are no devices running.
One helpful thing you can do is create a shortcut or terminal command to open your emulator without opening Android Studio, which is kind of a pain to open just to start an emulator. You can do this using something like what is mentioned here: https://stackoverflow.com/a/33487044/3218158
I tried creating an Android workspace with Codenvy with the sample hello world app provided. I built and ran the project. Clicked on 1(execute the run command) and then on 2(preview).
I never saw the hello world activity in the emulator screen and I didn't even see the app installed in the APPS section.
Am I doing something wrong?
You need to follow this guide https://github.com/che-samples/mobile-android-hello-world/blob/master/README.md and install apk once an emulator is started.
I am new to Android development and Eclipse. I have been given an Android app and asked to make some simple changes to it. I can build the project and run it in the emulator, but I see some errors in the LogCat window in Eclipse.
I put aside the app I was given and wrote the Hello World app, following the Hello World tutorial on developer.android.com. With this simple app, I was surprised to see many errors and stack dumps in the LogCat window. I closed Eclipse and re-launched it. After waiting for Eclipse to finish initializing, LogCat was empty. Then I started the Hello World app by clicking the run button. After a while entries appeared in LogCat, including many errors.
With such a simple app, copied from the tutorial, I am guessing the errors arise from the development environment and/or virtual device rather than from the app itself, but I would like to be able to run apps without errors.
Is it a reasonable expectation to be able to run Android apps from Eclipse on an AVD without any errors? Or is it the state of the art that the development environment logs many errors and dumps stack traces even when everything is running "normally"?
If it is reasonable, I will pursue each error until I have cleaned up my environment and application. I would prefer this, as I would then know that if errors appear as I continue development, they arise from my application and must be fixed. On the other hand, I can't spend months developing Eclipse and the Android SDK. If I have to learn to live with logs full of error messages, I'll just ignore them unless something crashes.
Note that the Hello World application runs as expected - it appears to be working despite the errors.
I am running Eclipse Indigo SR2 and Android SDK ??? (I don't see a version number for the SDK - the installer is r18 and SDK Manager says there are no updates available) on Windows 7 Professional, 64bit. I am testing with Android 4.0.3.
Use either:
adb com.your.package:v
or in log cat on the side button (You may need to make this visible by pressing the button with two rectangles in it in log cat) press the plus button and then add an application filter
I installed the Android 2.2 SDK (2.2 is the version i have on my smartphone). I've tried running the NotePad sample project as an Android project. Here is what happens: the emulator loads, but when I click on the app, the screen goes blank. There are no errors being thrown. Has anyone else run into this problem? If so, how have you fixed it?
When you press run, the emulator loads AND the application should automatically open and run. Also, make sure there are no errors with the code itself.
If all else fails, try a new/ different SDK and make sure the app has no errors during it's installation into the SDK. Look at the Console and LogCat to make sure that there are no errors the emulator runs.
I followed the Android Hello world example the other day, and got it to run. I saw "hello world" on the emulator. Today I ran it again, but I don't see "hello world" anymore! I waited 5 mins, and still saw Android charging 50% and showing time.
This is how I opened the Hello world project:
at Eclipse, File>New>android project, then I selected create from existing project. It brought up my project. Then I clicked on 'Run' button..no more Hello world.
I also saw this message in red at the Console window in Eclipse when I ran the project. What does this mean?
[2011-08-04 23:25:36 - Emulator] Unknown savevm section type 95
I also went to SDK&AVD manager, and installed Android 3.2 platform. My Hello world project requires minimum 2.2 platform.
How do I get Hello world to work again?
I have a feeling that you didn't swipe the lock and unlock the screen in the emulator. Did you swipe the green colour unlock button, then you'll be able to see the hello world application u wrote.
You can write hello world application even with android 1.5.