Ionic pro package apk error

**I am trying to do a build on ionic pro **
with cordova-android 6.3.0

I am having a gradle error which was solved by removing ‘~’ and’ ‘^’

Now I am having the error below.

FAILURE: Build failed with an exception.

  • What went wrong:
    A problem occurred configuring root project ‘android’.

You have not accepted the license agreements of the following SDK components:
[Android SDK Platform 26].
Before building your project, you need to accept the license agreements and complete the installation of the missing components using the Android Studio SDK Manager.
Alternatively, to learn how to transfer the license agreements from one workstation to another, go to Exporting licenses - Android Studio Project Site

  • Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 21.621 secs
Error: /usr/src/app/platforms/android/gradlew: Command failed with exit code 1 Error output:
FAILURE: Build failed with an exception.

  • What went wrong:
    A problem occurred configuring root project ‘android’.

You have not accepted the license agreements of the following SDK components:
[Android SDK Platform 26].
Before building your project, you need to accept the license agreements and complete the installation of the missing components using the Android Studio SDK Manager.
Alternatively, to learn how to transfer the license agreements from one workstation to another, go to Exporting licenses - Android Studio Project Site

  • Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
    Failed to upload apk to storage please retry your build.
    Running after script…
    $ clean-up
    Cleaning up files…
    Successful clean up
    ERROR: Job failed: exit status 1

I also tried using 6.2.3 but it gives me:

FAILURE: Build failed with an exception.

  • What went wrong:
    Execution failed for task ‘:processDebugManifest’.

Manifest merger failed : Attribute meta-data#android.support.VERSION@value value=(25.3.1) from [com.android.support:appcompat-v7:25.3.1] AndroidManifest.xml:27:9-31
is also present at [com.android.support:support-v4:26.0.0-alpha1] AndroidManifest.xml:27:9-38 value=(26.0.0-alpha1).
Suggestion: add ‘tools:replace=“android:value”’ to element at AndroidManifest.xml:25:5-27:34 to override.

  • Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 32.608 secs
Error: /usr/src/app/platforms/android/gradlew: Command failed with exit code 1 Error output:
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
/usr/src/app/platforms/android/AndroidManifest.xml:27:9-31 Error:
Attribute meta-data#android.support.VERSION@value value=(25.3.1) from [com.android.support:appcompat-v7:25.3.1] AndroidManifest.xml:27:9-31
is also present at [com.android.support:support-v4:26.0.0-alpha1] AndroidManifest.xml:27:9-38 value=(26.0.0-alpha1).
Suggestion: add ‘tools:replace=“android:value”’ to element at AndroidManifest.xml:25:5-27:34 to override.

FAILURE: Build failed with an exception.

  • What went wrong:
    Execution failed for task ‘:processDebugManifest’.

Manifest merger failed : Attribute meta-data#android.support.VERSION@value value=(25.3.1) from [com.android.support:appcompat-v7:25.3.1] AndroidManifest.xml:27:9-31
is also present at [com.android.support:support-v4:26.0.0-alpha1] AndroidManifest.xml:27:9-38 value=(26.0.0-alpha1).
Suggestion: add ‘tools:replace=“android:value”’ to element at AndroidManifest.xml:25:5-27:34 to override.

  • Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
    Failed to upload apk to storage please retry your build.
    Running after script…
    $ clean-up
    Cleaning up files…
    Successful clean up
    ERROR: Job failed: exit status 1