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。
以上这些方法对我都没用,
经过几个小时的调试,我发现问题在createImageFile(),特别是绝对路径与相对路径
我猜你们使用的是官方的Android拍照指南。https://developer.android.com/training/camera/photobasics
private static File createImageFile(Context context) throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = context.getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
请注意storageDir,这是将创建文件的位置。所以为了获得这个文件的绝对路径,我简单地使用image. getabsolutepath(),这个路径将在onActivityResult中使用,如果你需要拍摄照片后的位图图像
下面是file_path.xml文件,简单使用即可。所以它使用了绝对路径
<paths>
<external-path
name="my_images"
path="." />
</paths>
以及拍照后是否需要位图
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Bitmap bmp = null;
try {
bmp = BitmapFactory.decodeFile(mCurrentPhotoPath);
} catch (Exception e) {
e.printStackTrace();
}
}
我做了什么来解决这个问题
AndroidManifest.xml
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.mydomain.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/filepaths"/>
</provider>
fileppaths .xml(允许FileProvider共享应用程序外部文件目录中的所有文件)
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-files-path name="files"
path="/" />
</paths>
并在Java类-
Uri fileProvider = FileProvider.getUriForFile(getContext(),"com.mydomain.fileprovider",newFile);
你好,朋友,试试这个
在这段代码中
1)如何在清单中声明2个文件提供程序。
2)第一个文件下载提供商
3)第二供应商用于相机和画廊
步骤1
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
Provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths>
<files-path name="apks" path="." />
</paths>
第二个供应商
<provider
android:name=".Utils.MyFileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true"
tools:replace="android:authorities"
tools:ignore="InnerclassSeparator">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_path" />
</provider>
file_path.xml
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path name="storage/emulated/0" path="."/>
</paths>
.Utils.MyFileProvider
创建类MyFileProvider(只创建类,不声明任何方法)
当你使用文件提供程序时使用(.fileprovider)这个名称,而你使用图像(. Provider)使用这个名称。
如果有任何一个问题来理解这段代码,你可以联系rp1741995@gmail.com我会帮助你。