Android studio 报错Unable to find explicit activity

error: onError: android.content.ActivityNotFoundException: Unable to find explicit activity class {cn.itcast.myapplication/cn.itcast.myapplication.findStudent.findListView}; have you declared this activity in your AndroidManifest.xml?

原因：activity没有扫描到

在配置文件中加上对应的Activity

 <activity
            android:name=".allStudent.allListView"
            android:exported="true" />
        <activity android:name=".findStudent.findListView"
            android:exported="true"/>
        <activity
            android:name=".MainActivity2"
            android:exported="true" />

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