Android error: package android.os does not exist - android-studio

Question

I have imported a project to Android Studio using Gradle. Import process was successful, but it gives an error for android.os.*, when I try to import it.
It is a libGDX project.

Answer 1

I suggest to use AGP Upgrade assistent.
I often have probs upgrading gradle. This time with artic fox and java 11 it I got all those infamous android.* not found errors.
Then I discovered that neat AGP Upgrade assistent (in tools since Studio 4.2) - and it did what it should and everything is now using gradle 7 and compiles again.
About time such a tool was introduced - and I just saw about half a year too late ;)

Answer 2

Recently, I met a similar case in Android Studio 3.2.1 Ubuntu/Linux version.
I am quite sure about the issue shall be related to the Android SDK installation,because I build the same project in Android Studio of my Windows 10 laptop.
Issue:
Java compiler error at Android studio
error: package android.os does not exist
error: package android.media does not exist
error: package android.content does not exist
error: package android.util does not exist
error: cannot find symbol variable Log
error: cannot find symbol class Context
error: cannot find symbol class AudioRecord
Solution:
The android.jar which was mentioned at the build.gradle file was not installed at the /sdk/platforms/ directory. See the android.jar dependency at my build.gradle file below(which caused the issue),
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile files(sdkDir+'/platforms/android-24/android.jar')
}
Install the correct android platform(correct API level as mentioned in the build.gradle file,if any) and rebuild the project.

Answer 3

I am building from an old article, https://medium.com/#authmane512/how-to-build-an-apk-from-command-line-without-ide-7260e1e22676, and it doesn't yet have a build.gradle file, but I had the same error. I solved it by changing the compile command in my Makefile to:
classes: $(SOURCES)
javac -d obj \
-source 1.6 \
-target 1.8 \
-classpath src \
-bootclasspath $(ANDROID) \
$+
where ANDROID is /usr/local/src/android/adt-bundle-linux-x86_64-20130717/sdk/platforms/android-19/android.jar.
I get warnings now that source value 6 is obsolete, but at least it compiles.

Answer 4

In my case it was showing same kind of error with android.content.context
I figured out that the issue is I was using old gradle version with below android params in build.gradle
android {
compileOptions {
sourceCompatibility JavaVersion.VERSION_11
targetCompatibility JavaVersion.VERSION_11
}
}
So I removed this and the error is no more.