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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 kuwork
, 1 year ago
Unable to start activity ComponentInfo{com.ajb.anjubao.intelligent/com.ajb.LaunchActivity}: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.ajb.anjubao.intelligent/com.ajb.app.introduce.IntroduceActivity}; have you declared this activity in your AndroidManifest.xml?
via Stack Overflow by Ala Eddine Mrebai
, 7 months ago
Unable to start activity ComponentInfo{com.example.asus.sqlite/com.example.asus.sqlite.MainActivity}: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.asus.sqlite/com.example.asus.sqlite.Signin}; have you declared this activity in your AndroidManifest.xml?
via xda-developers.com by Unknown author, 2 years ago
Unable to start activity ComponentInfo{com.netco.camera/com.netco.camera.Main}: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.media.action.STILL_IMAGE_CAMERA }
via GitHub by aheadlcx
, 9 months ago
Unable to start activity ComponentInfo{net.wequick.example.small/net.wequick.example.small.app.main.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
via Stack Overflow by Leonid
, 1 year ago
Unable to start activity ComponentInfo{com.tech.te.app/com.tech.te.app.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
via teamtreehouse.com by Unknown author, 1 year ago
Unable to start activity ComponentInfo{com.teamtreehouse.stormy/com.teamtreehouse.stormy.ui.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.ajb.anjubao.intelligent/com.ajb.app.introduce.IntroduceActivity}; have you declared this activity in your AndroidManifest.xml?	at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1804)	at android.app.Instrumentation.execStartActivity(Instrumentation.java:1512)	at android.app.Activity.startActivityForResult(Activity.java:3838)	at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:50)	at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:79)	at android.app.Activity.startActivityForResult(Activity.java:3799)	at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:859)	at net.wequick.small.BundleLauncher.launchBundle(BundleLauncher.java:180)	at net.wequick.small.ApkBundleLauncher.launchBundle(ApkBundleLauncher.java:834)	at net.wequick.small.Bundle.launchFrom(Bundle.java:574)	at net.wequick.small.Small.openUri(Small.java:311)	at net.wequick.small.Small.openUri(Small.java:293)	at com.ajb.LaunchActivity$1.onComplete(LaunchActivity.java:55)	at net.wequick.small.Small.setUp(Small.java:171)	at com.ajb.LaunchActivity.onCreate(LaunchActivity.java:46)	at android.app.Activity.performCreate(Activity.java:6083)	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1115)	at net.wequick.small.ApkBundleLauncher$InstrumentationWrapper.callActivityOnCreate(ApkBundleLauncher.java:220)	at cn.jiguang.a.a.c.a.a.d.callActivityOnCreate(Unknown Source)	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2377)	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2486)	at android.app.ActivityThread.access$900(ActivityThread.java:175)	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1381)	at android.os.Handler.dispatchMessage(Handler.java:102)	at android.os.Looper.loop(Looper.java:135)	at android.app.ActivityThread.main(ActivityThread.java:5433)	at java.lang.reflect.Method.invoke(Native Method)	at java.lang.reflect.Method.invoke(Method.java:372)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1037)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832)