Android system is great when it comes to using Apps and enjoy seamless smartphone experience. Many times you may get annoying messages while you install Apps on your device, especially apps from ‘unknown sources’. One such message is ‘App Not Installed’ or ‘Application not Installed’. And it is a common issue faced by Android KitKat, Lollipop, Marshmallow etc. There are mainly 3 possible reasons for the error of installation.
- The App build may have corrupted or some of the core files have been modified knowingly or unknowingly.
- Android Manifest is the set of permissions has a lot of permissions where an error might have occurred.
- Gradle file – The problem might be in the file itself. Just check the minimum SDK version is suitable for your device.
- Installing an unsigned app could also result in this error.
Methods to Fix App Not Installed Error
Here are the potential solutions of “Application not Installed” error.
Method I: Sign the Unsigned App
- First, download and install ZipSigner from Google Play Store.
- Launch the app.
- You will see the app dashboard. You will see the dashboard,
4. Now, tap on Choose input/output and locate the apk file
5. Then tap on ‘Sign the file’.
6. Let the process be complete and then install the signed apk.
Method II: Reset All the App Preference
- Go to Settings on your Android device.
- Open Apps or Apps manager.
- check for All Apps.
- Tap on menu icon.
- Click on ‘Reset App Preferences’.
Method III: Change App Codes
You can make some changes in the version code or SDK to do so.
Step 1: Download APK Editor app from Google Play Store.
Step 2: Now open APK Editor App and click on ”Select APK from APP” or “Select an Apk File”
Step 5: Now look for the App and click on “common edit”.
Step 6: Here change the Version Number of the App to the any older version or to the one which your device supported.
You can also use an older version of the App and change the version name to the latest one.
Step 7: Apply the changes in APK Editor App.
Step 8: Uninstall any similar pre-installed app and install the modified App from APK Editor.
Method IV: Clear Data and Cache of Package Installer
- Open setting on your Android device.
- Look for the option called Apps or Manage apps and tap on it.
- Check for the Package Installer App under system Apps
- You will find two option of Clear data and Clear cache. (For Android Marshmallow 6.0 users check for option Storage to clear data and cache)
- Clear the data and cache to solve the problem.
Method V: Allow Apps from Unknown Sources
Go to Settings → Security → Unknown Sources. Enable Unknown Sources. And then try installing App.
Method VI: For Root Devices
- Download and open any root explorer app on your rooted device.
Copy the Apk then go to system >app and grant permissions to the app
- You will see App installed on your device.
Method VII: Clear Storage/Set Path
Clear some storage space on the device. Make sure SD Card has properly mounted if the file in located in SD Card.
I also recommend downloading the file in internal storage as downloading some types of APK files in external storage may sometimes cause issues due to improper read by package installer of Android OS.
Method VIII: Other Miscellaneous Fixes
- Delete .android_secure/smdl2tmpl.asec file from your SD Card.
- Reboot the phone and even remove the battery if possible.
- Uninstall all previous versions of the app or apps with same resemblance currently installed on your device.
- Remove the SD card and also do not connect your device to a PC while you install the apk.
- Free up some space, uninstall unnecessary apps.
Note & Conclusion: If the above post couldn’t solve the problem then you need some coding in Android SDK to check
build.gradlefile is unique.
I hope the post was helpful to resolve the issue of App Not Installed Error. Do comment below for any assistance if needed.