三星 Tab3 上的 sendUserActionEvent() mView==null [英] sendUserActionEvent() mView==null on Samsung Tab3

问题描述

I am trying to preview an image after capturing it using camera from inside my app, I am sure the path is not null but I am receiving this error in this line of code Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(),options); and there is no image view. Note: I tested the code on another device (not Samsung) and it works.

解决方案

I found a fix for this problem. Unfortunately, on some Samsung devices there is a problem with the built-in camera app that it causes screen rotation which leads to restarting your activity. For that mView becomes null. This happens also with other intents in samsung, not only in the camera. To fix it, you have to add this line in your manifest under your activity:

android:configChanges="orientation|screenSize"

Google mentions in the documentation

Beginning with Android 3.2 (API level 13), the "screen size" also changes when the device switches between portrait and landscape orientation. Thus, if you want to prevent runtime restarts due to orientation change when developing for API level 13 or higher (as declared by the minSdkVersion and targetSdkVersion attributes), you must include the "screenSize" value in addition to the "orientation" value. That is, you must declare android:configChanges="orientation|screenSize". However, if your application targets API level 12 or lower, then your activity always handles this configuration change itself (this configuration change does not restart your activity, even when running on an Android 3.2 or higher device).

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