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  1. ,
    via Stack Overflow by Rasel

    Your package name in the manifest is as com.google.android.gm and activity name as com.android.mail.compose.ComposeActivity, making a mismatch between the package and activity name. Your activity class name should start with the package name.

Solutions on the web

via Stack Overflow by user5960138
, 1 year ago
via Stack Overflow by Unknown author, 2 years ago
Unable to find explicit activity class {oscarorellana.nowwetryitmyway.physicsproject/oscarorellana.nowwetryitmyway.physicsproject.MathActivity}; have you declared this activity in your AndroidManifest.xml?
via GitHub by LukeOwlclaw
, 2 years ago
Unable to find explicit activity class {com.google.android.gm/com.google.android.gm.ComposeActivityGmail}; have you declared this activity in your AndroidManifest.xml?
via Stack Overflow by BWashishtha
, 1 year ago
Unable to find explicit activity class {com.example.neo.smsapp/com.example.neo.smsapp.IFTT.CancelAnAlarmActivity}; have you declared this activity in your AndroidManifest.xml?
via Stack Overflow by Unknown author, 2 years ago
No Activity found to handle Intent { act=com.example.hello.Menu }
Empty query.