Why do you get this error? well, it is because you are using the testing classes but those testing classes use some dependencies or libraries or packages that are missing so there are two solutions for this error: the first solution is to remove the testing classes and the second solution is to add the necessary packages in your project and sync the changes.

Watch the following videos to boost your knowledge:

Make android Apps using HTML, CSS and JS in Android Studio:
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A complete guide on how to make and publish an Android Mobile App:
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Download and install Android Studio properly on Windows 10 or 11:
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TAGS:

package androidx.test.platfrom.app does not exist,
package androidx.test.ext.junit.runners does not exist,
package org.junit does not exist,
package org.junit.runner does not exist,
package androidx test platfrom app does not exist,
package androidx test ext junit runners does not exist,
package org junit does not exist,
package org junit runner does not exist,
problem error or issue solved or fixed

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