Android Studio bug versioncode versionname signed apk issue
If you change android:versionCode="224" and android:versionName="2.2.4" in AndroidManifest.xml you have to change this in build.gradle file too.
Click on build.gradle in package explorer tree change your new version name and code:
Click on build.gradle in package explorer tree change your new version name and code:
defaultConfig {
applicationId "cz.okhelp.pocasiwidget"
minSdkVersion 11
targetSdkVersion 23
versionCode 224
versionName "2.2.4"
}
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Log.e println needs a message error.
E/AndroidRuntime(330): FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{b.paint/b.paint.MainActivity}: java.lang.NullPointerException: println needs a message
Try this code:
E/AndroidRuntime(330): FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{b.paint/b.paint.MainActivity}: java.lang.NullPointerException: println needs a message
Try this code:
// Error
String s = null;
Log.e("bla", s); // !!! error Log.e println needs a message error.
// OK
String s = null;
Log.e("bla", s+""); // OK
If you often copy your Android project to another you have to using function for obtaining varied information about package.
This code show how get package name in Android application as string:
This code show how get package name in Android application as string:
Context context = getContext(); // this.getContext(); getApplicationContext(); etc.
String sPackName = context.getPackageName();
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already added: Lcz/okhelp/MyMathClass;
First try this solution!!!!!
Select your project in project tree and go to the Eclipse menu Project » Clean » Clean projects selected below » select your project and click OK.
If you create *.apk package with proguard sometimes you must back up the project, delete project, and create new project if you are unable to create *.apk file.
Check your AndroidManifest.xml if all Activity is correctly inserted. If you add a library project to Main project you have to insert Activity from library to Main project AndroidManifest.xml
Problem with the library.
I deleted library project from project tree and again put the _library project into the main project. This problem was resolved.
1.)Go to Project » Properties » Java Build Path » Libraries and remove (your projects) click OK.
2.)Go to Project » Clean » Clean projects selected below » select your project and click OK.
3.)Add again your LIBRARY project to your MAIN project Project » Properties » Java Build Path » Libraries.
See image below.
Problem with a *.apk file
If you create signed *.apk, you have to delete previous *.apk from your PC folder.
java.lang.IllegalArgumentException: already added: Lcz/okhelp/MyMathClass;
First try this solution!!!!!
Select your project in project tree and go to the Eclipse menu Project » Clean » Clean projects selected below » select your project and click OK.
If you create *.apk package with proguard sometimes you must back up the project, delete project, and create new project if you are unable to create *.apk file.
Check your AndroidManifest.xml if all Activity is correctly inserted. If you add a library project to Main project you have to insert Activity from library to Main project AndroidManifest.xml
Problem with the library.
I deleted library project from project tree and again put the _library project into the main project. This problem was resolved.
1.)Go to Project » Properties » Java Build Path » Libraries and remove (your projects) click OK.
2.)Go to Project » Clean » Clean projects selected below » select your project and click OK.
3.)Add again your LIBRARY project to your MAIN project Project » Properties » Java Build Path » Libraries.
See image below.
Problem with a *.apk file
If you create signed *.apk, you have to delete previous *.apk from your PC folder.

Context context = getApplicationContext();
Drawable drawable = context.getResources().getDrawable(R.drawable.my_image);
// convert drawable to bitmap
Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();
// convert bitmap to drawable
Drawable d = new BitmapDrawable(bitmap);
Android example source code.
Brand | Samsung |
Model (codename) | Galaxy Y (S5360) |
Cena, včetně DPH | 2400 / 06.2012 |
Display size (v palcích) | 3 |
Display-resolution | 240x320 |
Dotek-typ | kapacitní |
CPU typ | BCM21553 |
CPU MHz | 832 |
CPU core | |
L2 cache | ? |
RAM | 256 |
ROM | 512 |
GPU | VideoCore IV |
NenaMark2 Benchmark | 12 |
GPU-GLBenchmark | |
Baterie mAh | 1200 |
Foto MPx | 2 |
Autofocus | ne |
Video | |
Official Android ICS | Android OS v 2.3 |
CyanogenMod support | |
Dotek-prstů-max | |
Display-ppi | 133 |
Display-retina | 41% |
Network | čîtyřpásmový GSM 850/900/1800/1900 MHz , HSDPA 2100 MHz |
Connectivity | Bluetooth v2.0 plus EDR plus support A2DP, USB host |
Pozn. | CPU ARMv6, GPU 20MT/s OpenGL ES 2.0 |

Editace: 2015-12-12 11:30:07
Počet článků v kategorii: 396
Url:android-studio-bug-versioncode-versionname-signed-apk-issue