java.lang.SecurityException:不再支持MODE

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该异常仅发生在Android 7.0 Nougat(仿真器)设备中.

The exception only occurs in Android 7.0 Nougat (emulator) devices.

java.lang.SecurityException:不再支持MODE_WORLD_READABLE

java.lang.SecurityException: MODE_WORLD_READABLE no longer supported

我的代码:

public void SessionMaintainence(Context context) { this.context = context; preferences = context.getSharedPreferences(PREF_NAME, Context.MODE_WORLD_READABLE); editor = preferences.edit(); editormit(); }

LogCat:

> E/AndroidRuntime: FATAL EXCEPTION: main > Process: burpp.av.feedback, PID: 2796 > java.lang.RuntimeException: Unable to create application > burpp.av.feedback.FeedbackApplication: java.lang.SecurityException: > MODE_WORLD_READABLE no longer supported > at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5364) > at android.app.ActivityThread.-wrap2(ActivityThread.java) > at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1528) > at android.os.Handler.dispatchMessage(Handler.java:102) > at android.os.Looper.loop(Looper.java:154) > at android.app.ActivityThread.main(ActivityThread.java:6077) > at java.lang.reflect.Method.invoke(Native Method) > at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) > at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) > Caused by: java.lang.SecurityException: MODE_WORLD_READABLE no longer supported > at android.app.ContextImpl.checkMode(ContextImpl.java:2162) > at android.app.ContextImpl.getSharedPreferences(ContextImpl.java:363) > at android.app.ContextImpl.getSharedPreferences(ContextImpl.java:358) > at android.content.ContextWrapper.getSharedPreferences(ContextWrapper.java:164) > at burpp.av.feedback.support.SessionMaintainence.<init>(SessionMaintainence.java:63) > at burpp.av.feedback.FeedbackApplication.onCreate(FeedbackApplication.java:43) > at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1024)

推荐答案

世界可读的文件可能是安全漏洞.因此，android首先弃用了它，然后将其完全删除.在Android M之前的版本中不推荐使用MODE_WORLD_READABLE.但是Android N中不再支持它，并抛出SecurityException.因此，请尝试其他模式.我使用了Context.MODE_PRIVATE并且有效.

World-readable files can be a security flaw. So android first deprecated it and then completely removed it. MODE_WORLD_READABLE was deprecated in versions till Android M. But in Android N it is no longer supported and throws SecurityException. So try a different mode. I used Context.MODE_PRIVATE and it worked.