java.lang.RuntimeException: Unable to instantiate activity ComponentInfo
It is a problem of your Intent. Please add your Activity in your AndroidManifest.xml. When you want to make a new activity, you should register it in your AndroidManifest.xml.
android
Android TextView : “Do not concatenate text displayed with setText”
Resource has the get overloaded version of getString which takes a varargs of type Object: getString(int, java.lang.Object…). If you setup correctly your string in strings.xml, with the correct place holders, you can use this version to retrieve the formatted version of your final String. E.g. using getString(R.string.welcome_message, “Test”, 0); android will return a String with … Read more
Could not identify launch Activity: Default Activity not found
For main activity in your manifest you have to add this with category LAUNCHER (First Activity on launch app): For other activity you have to change category to DEFAULT: Check this Activity and this Start Another Activity So your code is:
How can I fix ‘android.os.NetworkOnMainThreadException’?
NOTE : AsyncTask was deprecated in API level 30.AsyncTask | Android Developers This exception is thrown when an application attempts to perform a networking operation on its main thread. Run your code in AsyncTask: How to execute the task: In MainActivity.java file you can add this line within your oncreate() method Don’t forget to add … Read more
Android java.lang.IllegalStateException: Could not execute method of the activity
This line is throwing anNPE, producing an IllegalStateException in the exception chain: as you don’t initialize stopPort (or startPort) in your onCreate method. You should have something like: The statement simply declares the variable which is null by default. Only instances that have been instantiated can have their methods invoked.
Getting error “The package appears to be corrupt” while installing apk file
After searching a lot I found a solution: Go to Build-> Build Apk(s). After creating apk you will see a dialog as below. Click on locate and install it in your phone Enjoy
Android simple alert dialog
You would simply need to do this in your onClick: I don’t know from where you saw that you need DialogFragment for simply showing an alert.
Android Studio 3.2 – Could not find com.android.tools.build:aapt2:3.2.0-4818971
Most likely you do not have the Google repository in your project’s build.gradle file. Add google() in BOTH locations as shown below:
No tests found for given includes Error, when running Parameterized Unit test in Android Studio
Add to your build.gradle:
Android Studio: Unable to obtain result of ‘adb version’
Found the solution thanks to @user3109468, Android Studio had the directory for the Android SDK wrong. In File>Project Structure make sure the directory for the SDK is correct; mine was C:\Users\[user]\AppData\Local\Android\sdk (Google had given sdk a capital “S” for some reason…)