android debugger does not stop at breakpoints

Solution 1:

Solution that worked for me:

Simply uninstall the app from the device (manually on the device) and try debugging again(!)

Solution 2:

If you use Android studio, click debug app instead of run app:

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Solution 3:

According to this answer, Inside build.gradle for your app module, disable minifyEnable for your build variant and change it to false. Then, it should be:

minifyEnabled false

othewise you will see Line number not available in class xxxx when you hover over breakpoint markers and they will be looked with a cross on them

Solution 4:

Have you set the debuggable flag in the AndroidManifest? If you miss that, do so by adding android:debuggable="true" in the application tag. It should look like that in the end:

<application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true">

Solution 5:

In my case, click the "Attach debugger to Android process"

And it will shows a window said "Choose Process" Select the device you are using, and select the project that you want to debug. And it works.

Sometimes the debugger need to re-attach to the devices when you open the debugger at the first time.