Question

在我的Android应用程序中，我通过使用以下代码将文件转换为uri来获取设备的所有图像并将其设置为RecyclerView。

if (Build.VERSION.SDK_INT > 21) { 
            uri = FileProvider.getUriForFile(context, context.getPackageName()+".fileprovider", file);
        } else {
            uri = Uri.fromFile(file);
        }

provider_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths>

    <files-path name="files" path="." />
    <external-files-path name="external_files" path="." />
    <external-path name="external_files" path="." />
    <cache-path name="cached_files" path="." />
    <external-cache-path name="cached_files" path="." />


</paths>

AndroidManifest.xml中的

提供程序

...

 <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="<my.package.name>.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths"/>
  </provider>

...

这里的问题是api等级为21及以上的设备。它给了我以下例外。

 java.lang.IllegalArgumentException: Failed to find configured root that contains /storage/sdcard1/DCIM/20170914_143147.jpg
                                                                           at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:711)
                                                                           at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:400)
                                                                           at com.abc.adapters.GalleryAdapterCollage.getView(GalleryAdapterCollage.java:91)
                                                                           at android.widget.AbsListView.obtainView(AbsListView.java:2360)
                                                                           at android.widget.GridView.onMeasure(GridView.java:1060)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:728)
                                                                           at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:464)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5561)
                                                                           at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
                                                                           at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1083)
                                                                           at android.widget.LinearLayout.onMeasure(LinearLayout.java:615)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:728)
                                                                           at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:464)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5561)
                                                                           at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
                                                                           at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5561)
                                                                           at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
                                                                           at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
                                                                           at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5561)
                                                                           at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5561)
                                                                           at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
                                                                           at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
                                                                           at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5561)
                                                                           at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
                                                                           at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2696)
                                                                           at android.view.View.measure(View.java:17573)
                                                                           at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2161)
                                                                           at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1275)
                                                                           at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1520)
                                                                           at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1163)
                                                                           at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6190)
                                                                           at android.view.Choreographer$CallbackRecord.run(Choreographer.java:773)
                                                                           at android.view.Choreographer.doCallbacks(Choreographer.java:586)
                                                                           at android.view.Choreographer.doFrame(Choreographer.java:556)
                                                                           at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:759)
                                                                           at android.os.Handler.handleCallback(Handler.java:739)
                                                                           at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                           at android.os.Looper.loop(Looper.java:159)
                                                                           at android.app.ActivityThread.main(ActivityThread.java:5541)
                                                                           at java.lang.reflect.Method.invoke(Native Method)
                                                                           at java.lang.reflect.Method.invoke(Method.java:372)
                                                                           at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:975)
                                                                           at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:770)

-

在 api等级21及以上的某些设备中，其工作正常。但我在某些设备中遇到此例外，例如 oppo，mi 等。
来自我尝试使用<external-path name="external_files" path="DCIM/" />的异常路径，但这也不起作用。
我正在使用滑行来加载来自uri的图像。
我在这里尝试了许多类似的问题，但没有得到解决方案。

问题

如何在这些设备中修复此异常？
有没有其他方法可以像滑翔一样平稳地加载这些图像？

FileProvider“无法找到已配置的根”异常。仅限某些设备

0 个答案: