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

Question

寻找一些关于错误的帮助,我正在尝试存储用相机拍摄的照片,我试图开发的应用程序.错误是

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

logcat在我的代码中指向FileProvider.getUriForFile的行中指向此方法.

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);
            }
        }
    }

此方法用于创建图像文件

 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活动,如果用户点击缩略图,它将显示在该活动中ImageView.

@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file_paths.xml我创建并放在app/res/xml /文件夹中的文件(我也创建了它).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;
        }
    }

我当然感谢你的帮助.我还是新手,学习Android.提前致谢.

Answer 1

它的晚了......但我终于能够解决了.

根据文件: The path component only corresponds to the path that is returned by getExternalFilesDir() when called with Environment.DIRECTORY_PICTURES.

所以用

getExternalFilesDir(Environment.DIRECTORY_PICTURES)

代替

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)

你的道路应该是这样的:

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-path name="InstructiveRide" path="Android/data/com.package.ride/files/Pictures"/>
</paths>

如果你在Picture目录下有一个子目录,请写下这个.

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-path name="InstructiveRide" path="Android/data/com.package.ride/files/Pictures/InstructiveRide/"/>
</paths>

Answer 2

我曾经为File provider的所有路径提供样板代码。您将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>

有关更多详细信息，您可以检查FileProvider-指定可用文件

Answer 3

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

这指向files/内部的目录getFilesDir().但是,这不是createImageFile()放置文件的位置.相反,它正在使用Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).你需要:

1. 确定哪个位置是正确的(或选择其中任何一个选项),然后

2. 同步实现

Answer 4

我也试图升级我的应用程序以避免FileUriExposedException。我想实现与实际问题中提到的相同。我设法使用
Environment.getExternalStoragePublicDirectory（Environment.DIRECTORY_PICTURES）

唯一的技巧是使用以下路径

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

我从以下博客获得了此提示。

https://proandroiddev.com/sharing-files-though-intents-are-you-ready-for-nougat-70f7e9294a0b

我花了几个小时才弄清楚。我希望这可以使某人安全。