java - Android:无法提供结果，无法找到具有权限的提供者的元数据

Question

我正在尝试使用 uCrop 裁剪图像并上传到 firebase。我想允许选择使用相机或文件进行输入。

val pickIntent = Intent()
        pickIntent.type = "image/*"
        pickIntent.action = Intent.ACTION_GET_CONTENT
        val takePhotoIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
        val pickTitle = "Select or take a new Picture"
        val chooserIntent = Intent.createChooser(pickIntent, pickTitle)
        chooserIntent.putExtra(
            Intent.EXTRA_INITIAL_INTENTS, arrayOf(takePhotoIntent)
        )
        startActivityForResult(chooserIntent, REQUEST_IMAGE_CAPTURE)

我的onActivityResult函数如下所示:

override fun onActivityResult(
        requestCode: Int,
        resultCode: Int,
        data: Intent?
    ): Unit {
        super.onActivityResult(requestCode, resultCode, data)

        if (resultCode === Activity.RESULT_OK) {
            if (requestCode === REQUEST_IMAGE_CAPTURE) {
                var photoFile: File? = null
                try {
                    photoFile = createImageFile()
                    if(photoFile != null) Log.v("AFTER CREATE IMAGE FILE", "photoFILE " + photoFile.toString())
                    if (photoFile != null) {
                        var photoUri: Uri =
                            FileProvider.getUriForFile(this, this.packageName, photoFile)
                        Log.v("AFTER FILE URI", "photoUri " + photoUri.toString())
                        startCrop(photoUri)
                    }

                } catch (ex: IOException) {
                }

            }
        }
    }

上述代码中对 photoFile 的 null 检查失败，并且我没有收到该 if 语句的任何日志。但是，由于缺乏权限，我遇到了以下错误:

java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1888, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/image:25 flg=0x1 }} to activity {com.gigforce.app/com.gigforce.app.modules.photoCrop.ui.main.PhotoCrop}: java.lang.IllegalArgumentException: Couldn't find meta-data for provider with authority com.gigforce.app

但我的 list 中有以下内容:

        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="{applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths">
            </meta-data>
        </provider>

和file_paths.xml看起来像这样:

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="my_images"
        path="." />
</paths>

此外，由于某种原因，文件被保存在

/storage/emulated/0/Android/data/com.gigforce.app/files/Pictures/IMG_20200318_192722_2465645043825713296.jpg

而不是 file_paths.xml 中定义的 .

Answer 1

FileProvider.getUriForFile(this, this.packageName, photoFile)

您正在使用 this.packageName 作为您的权限字符串。

您的实际权限字符串是:

android:authorities="{applicationId}.provider"

这些不匹配。因此，请使用:

FileProvider.getUriForFile(this, "${this.packageName}.provider", photoFile)

或者:

FileProvider.getUriForFile(this, "${BuildConfig.APPLICATION_ID}.provider", photoFile)

(后者应该快一点)