[英]Error running 'app': The activity must be exported or contain an intent-filter
I'm quite new to android development and I have never been able to test a specific activity because it won't load onto the emulator.我对 android 开发还很陌生,而且我从未能够测试特定活动,因为它不会加载到模拟器上。 So I took advice from other questions on this platform.所以我从这个平台上的其他问题中得到了建议。 I went to run -> edit configurations -> Launch: specified activity and selected the activity from the launch options but this error keeps appearing.我去运行->编辑配置->启动:指定的活动并从启动选项中选择了该活动,但此错误一直出现。
I have StaffMainActivity and MemberMainActivity, they are identical however the member activity doesn't have the error.我有 StaffMainActivity 和 MemberMainActivity,它们是相同的,但是成员活动没有错误。
AndroidManifest code: AndroidManifest 代码:
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.JimsGym">
<activity android:name=".MemberLoginActivity" />
<activity android:name=".LoginOptions" />
<activity android:name=".MemberMainActivity" />
<activity android:name=".StaffMainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
StaffMainActivity code: StaffMainActivity 代码:
package com.example.jimsgym
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.navigation.findNavController
import androidx.navigation.ui.AppBarConfiguration
import androidx.navigation.ui.setupActionBarWithNavController
import androidx.navigation.ui.setupWithNavController
import com.google.android.material.bottomnavigation.BottomNavigationView
class StaffMainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.staff_main)
val bottomNavigationView = findViewById<BottomNavigationView>(R.id.bottomNavigationView2)
val navController = findNavController(R.id.fragment3)
val appBarConfiguration = AppBarConfiguration(setOf(R.id.staffHome, R.id.availabilityViewer, R.id.members))
setupActionBarWithNavController(navController, appBarConfiguration)
bottomNavigationView.setupWithNavController(navController)
}
}
MemberMainActivity code: MemberMainActivity 代码:
package com.example.jimsgym
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.navigation.findNavController
import androidx.navigation.ui.AppBarConfiguration
import androidx.navigation.ui.setupActionBarWithNavController
import androidx.navigation.ui.setupWithNavController
import com.google.android.material.bottomnavigation.BottomNavigationView
class MemberMainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.member_main)
val bottomNavigationView = findViewById<BottomNavigationView>(R.id.bottomNavigationView)
val navController = findNavController(R.id.fragment)
val appBarConfiguration = AppBarConfiguration(setOf(R.id.memberHome, R.id.availabilitySetter, R.id.bmiCalc))
setupActionBarWithNavController(navController, appBarConfiguration)
bottomNavigationView.setupWithNavController(navController)
}
}
Try adding parentActivity to childActivity:尝试将 parentActivity 添加到 childActivity:
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.JimsGym">
<activity android:name=".MemberLoginActivity"
android:parentActivityName=".StaffMainActivity"/>
<activity android:name=".LoginOptions"
android:parentActivityName=".StaffMainActivity"/>
<activity android:name=".MemberMainActivity"
android:parentActivityName=".StaffMainActivity"/>
<activity android:name=".StaffMainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
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