Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class

本文介绍了解决Android项目中由于在AndroidMainfest.xml文件内未声明Activity而导致的问题。通过在文件中application标签下添加对应的Activity声明即可解决。

原因

     AndroidMainfest.xml中没有声明新添加的Activity

解决

    在AndroidMainfest.xml中的application标签内部添加

<activity android:name="xxActivity" />

具体内容长这样:FATAL EXCEPTION: main Process: com.example.bus, PID: 16286 android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.bus/com.example.bus.AboutActivity}; have you declared this activity in your AndroidManifest.xml, or does your intent not match its declared <intent-filter>? at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:2423) at android.app.Instrumentation.execStartActivity(Instrumentation.java:2000) at android.app.Activity.startActivityForResult(Activity.java:5997) at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.java:780) at android.app.Activity.startActivityForResult(Activity.java:5954) at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.java:761) at android.app.Activity.startActivity(Activity.java:6457) at androidx.core.content.ContextCompat$Api16Impl.startActivity(ContextCompat.java:978) at androidx.core.content.ContextCompat.startActivity(ContextCompat.java:318) at androidx.fragment.app.FragmentHostCallback.onStartActivityFromFragment(FragmentHostCallback.java:166) at androidx.fragment.app.Fragment.startActivity(Fragment.java:1448) at androidx.fragment.app.Fragment.startActivity(Fragment.java:1436) at com.example.bus.ui.settings.SettingsFragment.lambda$setupButtonListeners$2$com-example-bus-ui-settings-SettingsFragment(SettingsFragment.java:67) at com.example.bus.ui.settings.SettingsFragment$$ExternalSyntheticLambda1.onClick(D8$$SyntheticClass:0) at android.view.View.performClick(View.java:8083) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1213) at android.view.View.performClickInternal(View.java:8060) at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0) at android.view.View$PerformClick.run(View.java:31549) at android.os.Handler.handleCallback(Handler.java:995) at android.os.Handler.dispatchMessage(Handler.java:103) at android.os.Looper.loopOnce(Looper.java:248) at android.os.Looper.loop(Looper.java:338) at android.app.ActivityThread.main(ActivityThread.java:9067) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:593) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:932)
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10-11
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