在尝试为我正在尝试开发的应用程序存储用相机拍摄的照片时遇到的错误，寻求一些帮助。错误是

java.lang.IllegalArgumentException:无法找到包含/storage/emulated/0/Pictures/JPEG20161108_153704_ 的已配置根

logcat 指向我的代码中调用 FileProvider.getUriForFile 的行中的此方法..

private void dispatchTakePhoto() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivity(takePictureIntent); // this worked originally
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
            File photoFile = null;
            try {
                photoFile = createImageFile();
            } catch (IOException e) {
                e.printStackTrace();
                Log.e(TAG, ""+e);
            }
            if (photoFile != null) {
                Uri photoURI = FileProvider.getUriForFile(TallyActivity2.this,
                        "com.example.bigdaddy.pipelinepipetally.fileprovider", photoFile);
                takePictureIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
                startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
            }
        }
    }

该方法用于创建图片文件

 private File createImageFile() throws IOException {
        /* Create an image file name */
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
        String imageFileName = "JPEG" + timeStamp + "_";
        File storageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsoluteFile(), imageFileName);
        File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);

        /* Tried this also, not working. Leaving for debugging.
        File image = File.createTempFile(
                imageFileName,
                ".jpg",
                storageDir
        );*/

        File image = new File(path, imageFileName);
        try {
            /* Making sure the Pictures directory exist.*/
            path.mkdir();
            storageDir.createNewFile();
        }catch (Exception e) {
            e.printStackTrace();
        }

        /* Save a file: path for use with ACTION_VIEW intents */
        mCurrentPhotoPath = "file:" + image.getAbsolutePath();
        return image;
    }

这是 onActivityResult() 方法，我想使用 saveImage() 方法将捕获的图像保存到一个类中，并将缩略图设置为 ImageView。 saveImage() 方法返回一个字节，因此我可以通过 Intent 将 Bundle 中的字节传递给另一个全屏 Activity ，如果用户单击缩略图 ImageView，它将显示在该 Activity 中。

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        /* If it's equal to my REQUEST_IMAGE_CAPTURE var, we are all good. */
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
            Bundle extras = data.getExtras();
            Bitmap imageBitmap = (Bitmap) extras.get("data");
            /*Saving to the Pipe class with the saveImage() method below.*/
            sDummyImagePicByte = saveImage(imageBitmap);
            /* Going ahead an setting the thumbnail here for the picture taken*/
            mPipePicImage.setImageBitmap(imageBitmap);
            Log.i(TAG,Arrays.toString(sDummyImagePicByte)+" after assignment from saveImage()");
        }
    }

这是 Manifest.xml 文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools"
          package="com.example.bigdaddy.pipelinepipetally">

    <uses-permission android:name="android.permission.READ_CONTACTS"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
        android:maxSdkVersion="18"/>
    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>

    <application
        android:allowBackup="true"
        android:debuggable="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        tools:ignore="HardcodedDebugMode">
        <activity
            android:name=".MainActivity"
            android:windowSoftInputMode="adjustResize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <activity
            android:name=".TallyActivity2"
            android:windowSoftInputMode="adjustResize">
        </activity>
        <activity
            android:name=".JobAndDbActivity"
            android:windowSoftInputMode="adjustResize">
        </activity>
        <activity
            android:name=".ExistingTallyActivity"
            android:windowSoftInputMode="adjustResize">
        </activity>
        <activity android:name=".ImageToFullscreen"
            android:windowSoftInputMode="adjustResize">
        </activity>

        <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="com.example.bigdaddy.pipelinepipetally.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>
</manifest>

这是我创建并放入 app/res/xml/文件夹(我也创建了)的 file_paths.xml 文件。不确定这是否是正确的位置(对于文件夹)。

<paths >
    <files-path name="my_images" path="files/"/>
    ...
</paths>

这也是 onRequestPermissionsResult()

 @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[],
                                           @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case MY_PERMISSIONS_REQUEST_CAMERA:
                /* if request is canceled, the result arrays are empty */
                if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                    /* Permissions granted so the mPermissionIsGranted boolean is set to true*/
                    mPermissionIsGranted = true;
                } else {
                    /*
                    Permissions denied so the mPermissionIsGranted boolean stays false here and
                    providing a Toast message to the user, letting them know that camera permissions
                    are required for this feature.
                    */
                    Toast.makeText(getApplicationContext(),"Camera permissions required\nfor this" +
                                    "feature.",
                            Toast.LENGTH_LONG).show();
                    /* Continuing to hold the false setting to this boolean since not granted.*/
                    mPermissionIsGranted = false;
                }
                break;
            /* For accessing and writing to the SD card*/
            case MY_PERMISSIONS_REQUEST_SD_CARD:
                /* if request is canceled, the result arrays are empty */
                if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                    /* Permissions granted so the mPermissionIsGranted boolean is set to true*/
                    mPermissionIsGranted = true;
                } else  {
                    /*
                    Permissions denied so the mPermissionIsGranted boolean stays false here and
                    providing a Toast message to the user, letting them know that camera permissions
                    are required for this feature.
                    */
                    Toast.makeText(getApplicationContext(),"SD Card permissions required\nfor this"+
                                    "feature.",
                            Toast.LENGTH_LONG).show();
                    /* Continuing to hold the false setting to this boolean since not granted.*/
                    mPermissionIsGranted = false;
                }
                break;
            /* For the GPS location permissions.*/
            default: MY_PERMISSIONS_REQUEST_FINE_LOCATION:
            /* Still to be implemented .*/
                break;
        }
    }

我非常感谢这方面的任何帮助。我还是新手，正在学习 Android。提前致谢。

最佳答案

我曾经为文件提供程序的所有路径提供样板代码。您永远不会遇到此类错误。

<?xml version="1.0" encoding="utf-8"?>
<paths>
  <external-path name="external" path="." />
  <external-files-path name="external_files" path="." />
  <cache-path name="cache" path="." />
  <external-cache-path name="external_cache" path="." />
  <files-path name="files" path="." />
</paths>

更多详情，您可以查看FileProvider - Specifying available Files

关于java.lang.IllegalArgumentException : Failed to find configured root that contains/storage/emulated/0/Pictures/异常，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40498380/