Xamarin android 崩溃调试

Posted 2023-04-12

【中文标题】Xamarin android 崩溃调试

【英文标题】：Xamarin android crashing off debugging

【发布时间】：2021-10-01 21:34:28

【问题描述】：

我正在创建一个 Xamarin android 应用程序，它工作了很长时间，但现在当我在没有附加调试器（安装在设备上）的情况下运行它并且在使用 Visual Studio 调试（连接到笔记本电脑）时工作正常时它崩溃了。似乎是什么问题。

这是我的 androidmanifest.xml 文件供您查看

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="PACKAGE NAME" android:installLocation="auto" android:versionCode="1" android:versionName="1.0">
  <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
  <!-- Google Maps for Android v2 requires OpenGL ES v2 -->
  <uses-feature android:glEsVersion="0x00020000" android:required="true" />
  <!-- Permission to receive remote notifications from Google Play Services -->
  <!-- Notice here that we have the package name of our application as a prefix on the permissions. -->
  <uses-permission android:name="PACKAGE NAME.permission.MAPS_RECEIVE" />
  <permission android:name="PACKAGE NAME.permission.MAPS_RECEIVE" android:protectionLevel="signature" />
  <!-- These are optional, but recommended. They will allow Maps to use the My Location provider. -->
  <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  <uses-feature android:name="android.hardware.camera" android:required="false" />
  <uses-feature android:name="android.hardware.camera.autofocus" android:required="false" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
  <uses-permission android:name="android.permission.CAMERA" />
  <uses-permission android:name="android.permission.VIBRATE" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />


  <application android:name="android.app.Application" android:allowBackup="true" android:appComponentFactory="androidx.core.app.CoreComponentFactory" android:debuggable="true" android:extractNativeLibs="true" android:icon="@drawable/appiconfinal" android:label="Problem Update" android:roundIcon="@drawable/appiconfinal" android:supportsRtl="true" android:theme="@style/AppTheme" android:usesCleartextTraffic="true">
    <!-- Necessary for apps that target Android 9.0 or higher -->
    <uses-library android:name="org.apache.http.legacy" android:required="false" />


    <provider android:name="androidx.core.content.FileProvider" android:authorities="PACKAGE NAME.fileprovider" android:exported="false" android:grantUriPermissions="true">
      <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" />
      <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
    </provider>
    <activity android:name="crc64830617e3579ebeb9.CreateIssue" android:label="CreateIssue" />
    <activity android:name="crc64830617e3579ebeb9.createissue2" android:label="createissue2" />
    <activity android:name="crc64830617e3579ebeb9.createissue3" android:label="createissue3" />
    <activity android:name="crc64830617e3579ebeb9.createissue4" android:label="createissue4" />
    <activity android:name="crc64830617e3579ebeb9.createissue5" android:label="createissue5" />
    <activity android:name="crc64830617e3579ebeb9.createissue6" android:label="createissue6" />
    <activity android:name="crc64830617e3579ebeb9.EmailVerifyActivity" android:label="EmailVerifyActivity" />
    <activity android:name="crc64830617e3579ebeb9.ForgotPassActivity" android:label="ForgotPassActivity" />
    <activity android:name="crc64830617e3579ebeb9.FundsActivity" android:label="FundsActivity" />
    <activity android:name="crc64830617e3579ebeb9.LocationActivity" android:label="LocationActivity" />act
    <activity android:name="crc64830617e3579ebeb9.LocationsActivity" android:label="LocationsActivity" />
    <activity android:name="crc64830617e3579ebeb9.Login" android:label="Login" >

    </activity>
    <activity android:name="crc64830617e3579ebeb9.MainActivity" android:label="@string/app_name" android:theme="@style/AppTheme" >
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <activity android:name="crc64830617e3579ebeb9.testActivity" android:label="testActivity">

    </activity>
    <activity android:name="crc64830617e3579ebeb9.MapActivity" android:label="MapActivity"/>
    <activity android:name="crc64830617e3579ebeb9.Newpassword" android:label="Newpassword" />
    <activity android:name="crc64830617e3579ebeb9.NotificationsActivity" android:label="NotificationsActivity" />
    <activity android:name="crc64830617e3579ebeb9.OTPVerify" android:label="OTPVerify" />
    <activity android:name="crc64830617e3579ebeb9.PhotoUploading" android:label="PhotoUploading" />
    <activity android:name="crc64830617e3579ebeb9.Register1Activity" android:label="Register1Activity" />
    <activity android:name="crc64830617e3579ebeb9.Register2Activity" android:label="Register2Activity" />
    <activity android:name="crc64830617e3579ebeb9.Register3Activity" android:label="Register3Activity" />
    <activity android:name="crc64830617e3579ebeb9.SettingsActivity" android:label="SettingsActivity" />
    <activity android:name="crc644f28929abffd59e1.HomeActivity" android:label="HomeActivity" />
    <activity android:name="crc646957603ea1820544.MediaPickerActivity" android:configChanges="orientation|screenSize|uiMode" />
    <service android:name="crc64396a3fe5f8138e3f.KeepAliveService" />
    <receiver android:name="crc64a0e0a82d0db9a07d.BatteryBroadcastReceiver" android:enabled="true" android:exported="false" android:label="Essentials Battery Broadcast Receiver" />
    <receiver android:name="crc64a0e0a82d0db9a07d.EnergySaverBroadcastReceiver" android:enabled="true" android:exported="false" android:label="Essentials Energy Saver Broadcast Receiver" />
    <receiver android:name="crc64a0e0a82d0db9a07d.ConnectivityBroadcastReceiver" android:enabled="true" android:exported="false" android:label="Essentials Connectivity Broadcast Receiver" />
    <provider android:name="xamarin.essentials.fileProvider" android:authorities="PACKAGE NAME.fileProvider" android:exported="false" android:grantUriPermissions="true">
      <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/xamarin_essentials_fileprovider_file_paths" />
    </provider>
    <provider android:name="mono.MonoRuntimeProvider" android:authorities="PACKAGE NAME.mono.MonoRuntimeProvider.__mono_init__" android:exported="false" android:initOrder="1999999999" />
    <!-- suppress ExportedReceiver -->
    <receiver android:name="mono.android.Seppuku">
      <intent-filter>
        <action android:name="mono.android.intent.action.SEPPUKU" />
        <category android:name="mono.android.intent.category.SEPPUKU.PACKAGE NAME" />
      </intent-filter>
    </receiver>
    <activity android:name="com.google.android.gms.common.api.GoogleApiActivity" android:exported="false" android:theme="@android:style/Theme.Translucent.NoTitleBar" />
    <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
    <!-- suppress ExportedReceiver -->
    <meta-data android:name="com.google.android.geo.API_KEY" android:value="API KEY"/>

    <receiver android:name="com.google.firebase.iid.FirebaseInstanceIdInternalReceiver" android:exported="false" />
    <receiver android:name="com.google.firebase.iid.FirebaseInstanceIdReceiver" android:exported="true" android:permission="com.google.android.c2dm.permission.SEND">
      <intent-filter>
        <action android:name="com.google.android.c2dm.intent.RECEIVE" />
        <action android:name="com.google.android.c2dm.intent.REGISTRATION"/>
        <category android:name="$applicationId" />
      </intent-filter>
    </receiver>


    <!--FCM RECEIVER ENDS HERE-->


  </application>
</manifest>

【问题讨论】：

根据您提供的代码，我们找不到导致此问题的原因。你能提供更多细节吗？您是否使用设备和模拟器的健全版本进行了测试？当您将调试器与设备一起使用时，您是否会收到相同的错误？

谢谢，但是问题已经解决了，我在启动应用程序时查看了Cat Log，发现错误是由于提供给newtonsoft.json反序列化器的空值造成的。

【参考方案1】：

问题不在于 AndroidManifest.xml 文件或应用程序构建设置，而是由于主活动中的空值对象。 PS：在没有调试的情况下在手机上启动应用程序时通过查看Cat Log发现的。