我试图用相机拍照,但我得到以下错误:
FATAL EXCEPTION: main
Process: com.example.marek.myapplication, PID: 6747
java.lang.IllegalArgumentException: Failed to find configured root that contains /storage/emulated/0/Android/data/com.example.marek.myapplication/files/Pictures/JPEG_20170228_175633_470124220.jpg
at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:711)
at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:400)
at com.example.marek.myapplication.MainActivity.dispatchTakePictureIntent(MainActivity.java:56)
at com.example.marek.myapplication.MainActivity.access$100(MainActivity.java:22)
at com.example.marek.myapplication.MainActivity$1.onClick(MainActivity.java:35)
AndroidManifest.xml:
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.example.marek.myapplication.fileprovider"
android:enabled="true"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
Java:
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
Toast.makeText(getApplicationContext(), "Error while saving picture.", Toast.LENGTH_LONG).show();
}
// Continue only if the File was successfully created
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(this,
"com.example.marek.myapplication.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths>
<files-path name="my_images" path="images/"/>
</paths>
我一整天都在搜索这个错误,试图理解FileProvider,但我不知道这个错误消息试图告诉我什么。如果你想要更多信息/代码,请在评论中告诉我。
我得到这个错误未能找到配置根包含…
下面的工作解决了我的问题
res / xml / file_paths xml。
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="media" path="." />
</paths>
AndroidManifest.xml
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="[PACKAGE_NAME]"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths">
</meta-data>
</provider>
ActivityClass.java
void shareImage() {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("image/*");
intent.putExtra(Intent.EXTRA_STREAM, FileProvider.getUriForFile(this,"com.slappstudio.pencilsketchphotomaker", selectedFilePath));
startActivity(Intent.createChooser(intent,getString(R.string.string_share_with)));
}
问题可能不仅仅是路径xml。
以下是我的解决方案:
查看android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile()中的根课程:
public File getFileForUri(Uri uri) {
String path = uri.getEncodedPath();
final int splitIndex = path.indexOf('/', 1);
final String tag = Uri.decode(path.substring(1, splitIndex));
path = Uri.decode(path.substring(splitIndex + 1));
final File root = mRoots.get(tag); // mRoots is parsed from path xml
if (root == null) {
throw new IllegalArgumentException("Unable to find configured root for " + uri);
}
// ...
}
这意味着mRoots应该包含所请求uri的标记。所以我写了一些代码来打印mRoots和uri的标签,然后很容易发现标签不匹配。
结果是将提供者权限设置为${applicationID}。提供者是个愚蠢的想法!这个权限非常常见,可能会被其他提供者使用,这会弄乱路径配置!
花了两周时间试图找到一些解决方案…如果你在尝试了以上所有方法后到达这里:
1 -验证你的标签提供者是否在标签应用程序内
<application>
<provider android:name="android.support.v4.content.FileProvider" android:authorities="com.companyname.Pocidadao.fileprovider" android:exported="false" android:grantUriPermissions="true">
<meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths"></meta-data>
</provider>
</application>
2 -如果你尝试了很多方法都没有成功,那么就用这个方法来测试:
<?xml version="1.0" encoding="utf-8"?>
<paths>
<cache-path name="cache" path="." />
<external-path name="external" path="." />
<root-path name="root" path="." />
<files-path name="my_images" path="/" />
<files-path name="my_images" path="myfile/"/>
<files-path name="files" path="." />
<external-path name="external_files" path="." />
<external-path name="images" path="Pictures" />
<external-path name="my_images" path="." />
<external-path name="my_images" path="Android/data/com.companyname.yourproject/files/Pictures" />
<external-path name="my_images" path="Android/data/com.companyname.yourproject/files/Pictures/" />
<external-files-path name="images" path="Pictures"/>
<external-files-path name="camera_image" path="Pictures/"/>
<external-files-path name="external_files" path="." />
<external-files-path name="my_images" path="my_images" />
<external-cache-path name="external_cache" path="." />
</paths>
测试这个,如果相机工作,然后开始消除一些线,并继续测试…
3 -不忘记验证相机是否在模拟器中激活。