科尔多瓦和Proguard:takePicture上的相机插件NPE [英] Cordova and proguard : Camera Plugin NPE on takePicture
本文介绍了科尔多瓦和Proguard:takePicture上的相机插件NPE的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
很抱歉，是否有人已经要求过这个. 我是Stack的新手，但没有找到解决方案.
sorry if someone already asked for this. I'm very new on Stack, and i didn't found a solution.
这是我缩小应用程序使用后得到的堆栈.
Here is the stack i get form the usage of my app after I minified it.
08-29 13:27:30.330 10037-10192/? E/PluginManager: Uncaught exception from plugin
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.PackageItemInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference
at android.support.v4.content.FileProvider.parsePathStrategy(Unknown Source)
at android.support.v4.content.FileProvider.getPathStrategy(Unknown Source)
at android.support.v4.content.FileProvider.getUriForFile(Unknown Source)
at org.apache.cordova.camera.CameraLauncher.takePicture(Unknown Source)
at org.apache.cordova.camera.CameraLauncher.callTakePicture(Unknown Source)
at org.apache.cordova.camera.CameraLauncher.execute(Unknown Source)
at org.apache.cordova.CordovaPlugin.execute(Unknown Source)
at org.apache.cordova.PluginManager.exec(Unknown Source)
at org.apache.cordova.CordovaBridge.jsExec(Unknown Source)
at org.apache.cordova.engine.SystemExposedJsApi.exec(Unknown Source)
at org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
at org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:7)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.os.HandlerThread.run(HandlerThread.java:61)
这是我的保护文件:
# ionic
-keep class org.apache.cordova.** { *; }
-keep class org.apache.cordova.camera.** { *; }
-keep public class * extends org.apache.cordova.CordovaPlugin
-keep class com.ionic.keyboard.IonicKeyboard.** { *; }
-keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable {
public static final *** NULL;
}
-keepnames @com.google.android.gms.common.annotation.KeepName class *
-keepclassmembernames class * {
@com.google.android.gms.common.annotation.KeepName *;
}
-keepnames class * implements android.os.Parcelable {
public static final ** CREATOR;
}
# Not sure if needed, found it in several documentations
-keep class * extends java.util.ListResourceBundle {
protected Object[][] getContents();
}
-keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable {
public static final *** NULL;
}
-keepnames @com.google.android.gms.common.annotation.KeepName class *
-keepclassmembernames class * {
@com.google.android.gms.common.annotation.KeepName *;
}
-keepnames class * implements android.os.Parcelable {
public static final ** CREATOR;
}
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
#-libraryjars ./libs/android-support-v4.jar
-dontwarn android.support.v4.**
-keep class android.support.v4.** { *; }
-keep interface android.support.v4.** { *; }
-keep public class * extends android.support.v4.**
-keep public class * extends android.app.Fragment
-keep class android.support.v4.content.FileProvider
-keepclasseswithmembernames class * {
native <methods>;
}
-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet, int);
}
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator *;
}
-dontwarn com.worklight.common.internal.WLTrusteerInternal*
-dontwarn com.worklight.jsonstore.**
-dontwarn org.codehaus.jackson.map.ext.*
-dontwarn com.worklight.androidgap.push.GCMIntentService
-dontwarn com.worklight.androidgap.plugin.WLInitializationPlugin
-dontwarn android.net.SSLCertificateSocketFactory
-dontwarn android.net.http.*
-keepattributes *Annotation*
如果我使用从画廊中选择"选项，一切都很好，但是每次尝试使用相机时，都会出现此错误.
If i use the "choose from the gallery" item, all is ok, but every time i try to use the camera i get this error.
对于Android清单，我有这个:
For the android manifest i have this :
<?xml version='1.0' encoding='utf-8'?>
<manifest android:hardwareAccelerated="true" android:versionCode="24" android:versionName="2.4" package="" xmlns:android="http://schemas.android.com/apk/res/android">
<supports-screens android:anyDensity="true" android:largeScreens="true" android:normalScreens="true" android:resizeable="true" android:smallScreens="true" android:xlargeScreens="true" />
<uses-permission android:name="android.permission.INTERNET" />
<application android:hardwareAccelerated="true" android:icon="@mipmap/icon" android:label="@string/app_name" android:supportsRtl="true">
<activity android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale" android:label="@string/activity_name" android:launchMode="singleTop" android:name="MainActivity" android:screenOrientation="portrait" android:theme="@android:style/Theme.DeviceDefault.NoActionBar" android:windowSoftInputMode="adjustResize">
<intent-filter android:label="@string/launcher_name">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true"
android:name="android.support.v4.content.FileProvider">
<meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/provider_paths" />
</provider>
</application>
<uses-sdk android:minSdkVersion="16" android:targetSdkVersion="22" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
</manifest>
请注意，我从清单中删除了软件包名称(仅针对此文章，该名称仅在堆栈中，在我的内部版本中就是该名称)
Notice that i removed the package name from the manifest (for this post on stack only, in my build there is the name)
如果我使用minifyenabled false删除了proguard，则该应用程序正常并且可以处理相机.
If i remove proguard with minifyenabled false, the app is ok and deals with the camera.
我不知道缩小了什么，我应该增加以保持? 或者，也许您有提示/技巧来发现我的方法中有什么不好?
I dont know what is shrinked and i should add to keep ? Or perhaps have you a hint / tips to found what is bad in my method?
谢谢.
推荐答案
如果仍然有人卡在此
将此行添加到您的保护规则
Add this line to Your proguard rules
-keep class com.abc.xyz.BuildConfig { *; }
其中com.abc.xyz是您的软件包名称
where com.abc.xyz is your Package name
就这样...
稍后谢谢...
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