解决android.support.v4.content.FileProvide找不到的问题
在AndroidManifest.xml中加入下面这段话后,
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在Android4.4.2版本的手机出现了下面的错误提示
E/AndroidRuntime: FATAL EXCEPTION: main Process: com.boxin.forklift, PID: 7106 java.lang.RuntimeException: Unable to get provider android.support.v4.content.FileProvider: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.content.FileProvider" on path: DexPathList[[zip file "/data/app/com.boxin.forklift-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.boxin.forklift-1, /vendor/lib, /system/lib, /data/datalib]] at android.app.ActivityThread.installProvider(ActivityThread.java:5045) at android.app.ActivityThread.installContentProviders(ActivityThread.java:4631) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4571) at android.app.ActivityThread.access$1700(ActivityThread.java:143) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1304) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5291) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.content.FileProvider" on path: DexPathList[[zip file "/data/app/com.boxin.forklift-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.boxin.forklift-1, /vendor/lib, /system/lib, /data/datalib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass(ClassLoader.java:497) at java.lang.ClassLoader.loadClass(ClassLoader.java:457) at android.app.ActivityThread.installProvider(ActivityThread.java:5030) at android.app.ActivityThread.installContentProviders(ActivityThread.java:4631) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4571) at android.app.ActivityThread.access$1700(ActivityThread.java:143) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1304) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5291) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) at dalvik.system.NativeStart.main(Native Method)
解决方案:
第一:可能是添加MultiDex分包,但未初始化的原因,在Application中重写attachBaseContext函数,对MultiDex初始化即可。
1)首先修改Gradle配置文件,启用MultiDex并包含MultiDex支持:
defaultConfig { multiDexEnabled true }
项目完整写法:
android { compileSdkVersion 27 defaultConfig { applicationId "com.boxin.forklift" minSdkVersion 19 targetSdkVersion 27 testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" multiDexEnabled true }
2)修改BoXinApplication,重写attachBaseContext方法
BoxinApplication默认的命名方式是:BaseApplication
@Override protected void attachBaseContext(Context base) { super.attachBaseContext(base); MultiDex.install(base); }
加入后成功运行项目到手机。
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