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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 GitHub by zura03geolab
, 1 year ago
Unable to find explicit activity class {project.afinal.vashakidze.zura.finalproject/project.afinal.vashakidze.zura.finalproject.item_details}; have you declared this activity in your AndroidManifest.xml?
via Stack Overflow by user5960138
, 1 year ago
via GitHub by LukeOwncloud
, 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
Unable to find explicit activity class {oscarorellana.nowwetryitmyway.physicsproject/oscarorellana.nowwetryitmyway.physicsproject.MathActivity}; 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 }
android.content.ActivityNotFoundException: Unable to find explicit activity class {project.afinal.vashakidze.zura.finalproject/project.afinal.vashakidze.zura.finalproject.item_details}; have you declared this activity in your AndroidManifest.xml?	at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1794)	at android.app.Instrumentation.execStartActivity(Instrumentation.java:1512)	at android.app.Activity.startActivityForResult(Activity.java:3917)	at android.app.Activity.startActivityForResult(Activity.java:3877)	at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:842)	at android.app.Activity.startActivity(Activity.java:4200)	at android.app.Activity.startActivity(Activity.java:4168)	at project.afinal.vashakidze.zura.finalproject.MainActivity$1.onItemClick(MainActivity.java:63)	at project.afinal.vashakidze.zura.finalproject.adapter.RecylerListAdapter$MyViewHolder$1.onClick(RecylerListAdapter.java:61)	at android.view.View.performClick(View.java:5198)	at android.view.View$PerformClick.run(View.java:21147)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:148)	at android.app.ActivityThread.main(ActivityThread.java:5417)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)