API级别29中不推荐使用Environment.getExternalStorageDirectory（） [英] Environment.getExternalStorageDirectory() deprecated in API level 29 java

问题描述

使用android Java进行工作，最近将SDK更新到API级别29，现在显示警告，指出

Working on android Java, recently updated SDK to API level 29 now there is a warning shown which states that

Environment.getExternalStorageDirectory（） 在API级别29中已弃用

Environment.getExternalStorageDirectory() is deprecated in API level 29

我的代码是

private void saveImage() {

if (requestPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {

    final String folderPath = Environment.getExternalStorageDirectory() + "/PhotoEditors";
    File folder = new File(folderPath);
    if (!folder.exists()) {
        File wallpaperDirectory = new File(folderPath);
        wallpaperDirectory.mkdirs();
    }


    showLoading("Saving...");
    final String filepath=folderPath
                + File.separator + ""
                + System.currentTimeMillis() + ".png";
    File file = new File(filepath);

    try {
        file.createNewFile();
        SaveSettings saveSettings = new SaveSettings.Builder()
                .setClearViewsEnabled(true)
                .setTransparencyEnabled(true)
                .build();
        if(isStoragePermissionGranted() ) {
            mPhotoEditor.saveAsFile(file.getAbsolutePath(), saveSettings, new PhotoEditor.OnSaveListener() {
            @Override
            public void onSuccess(@NonNull String imagePath) {
                hideLoading();
                showSnackbar("Image Saved Successfully");
                mPhotoEditorView.getSource().setImageURI(Uri.fromFile(new File(imagePath)));
                sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,Uri.fromFile(new File(filepath))));
                Intent intent = new Intent(EditImageActivity.this, StartActivity.class);
                startActivity(intent);
                finish();

            } 

            @Override
            public void onFailure(@NonNull Exception exception) {
                hideLoading();
                showSnackbar("Failed to save Image");
            }
       });
   }

这有什么选择？

推荐答案

使用 getExternalFilesDir（）， getExternalCacheDir（）或 getExternalMediaDir（）（ Context 上的方法），而不是 Environment.getExternalStorageDirectory（） 。

Use getExternalFilesDir(), getExternalCacheDir(), or getExternalMediaDir() (methods on Context) instead of Environment.getExternalStorageDirectory().

或者，修改 mPhotoEditor 使其能够与 Uri ，然后：

Or, modify mPhotoEditor to be able to work with a Uri, then:

• 使用 ACTION_CREATE_DOCUMENT 获取 Uri 到用户选择的位置，或

• Use ACTION_CREATE_DOCUMENT to get a Uri to a location of the user's choosing, or

使用 MediaStore ， ContentResolver 和 insert（）以获得 Uri 用于特定类型的媒体（例如图像）—请参见此示例应用，该示例演示了如何下载MP4来自网站的视频

Use MediaStore, ContentResolver, and insert() to get a Uri for a particular type of media (e.g., an image) — see this sample app that demonstrates doing this for downloading MP4 videos from a Web site

此外，请注意，您的 Uri.fromFile ACTION_MEDIA_SCANNER_SCAN_FILE 的$ c>在Android 7.0及更高版本上应具有 FileUriExposedException 崩溃。在Android Q上，只有 MediaStore / insert（）选项将使您的内容由 MediaStore 很快。

Also, note that your Uri.fromFile with ACTION_MEDIA_SCANNER_SCAN_FILE should be crashing on Android 7.0+ with a FileUriExposedException. On Android Q, only the MediaStore/insert() option will get your content indexed by the MediaStore quickly.

请参见此博客文章，详细了解Android Q如何影响外部存储。

See this blog post for more on how Android Q has affected external storage.

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