来自Android 6(Marshmallow)的Gallery中的图片

Question

在我的应用程序中,我试图从厨房中选择图像,以便将该图像传递给服务器.

代码在Android 5及更低版本上正常运行,但对于Nexus 5上的Android 6,我无法获取图像信息.记录我得到的痕迹

注意:Android 5及以下版本的代码运行正常

11-06 12:27:43.736: W/System.err(31678): java.lang.SecurityException: Permission Denial: reading com.google.android.apps.photos.contentprovider.MediaContentProvider uri content://com.google.android.apps.photos.contentprovider/0/1/content%3A//media/external/images/media/19138/ACTUAL/94710853 from pid=31678, uid=10111 requires the provider be exported, or grantUriPermission()
11-06 12:27:43.757: W/System.err(31678): 
at android.os.Parcel.readException(Parcel.java:1599)
11-06 12:27:43.757: W/System.err(31678): 
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183)
11-06 12:27:43.757: W/System.err(31678): 
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
11-06 12:27:43.757: W/System.err(31678): 
at android.content.ContentProviderProxy.query(ContentProviderNative.java:421)
11-06 12:27:43.757: W/System.err(31678): 
at android.content.ContentResolver.query(ContentResolver.java:491)
11-06 12:27:43.757: W/System.err(31678): 
at android.content.ContentResolver.query(ContentResolver.java:434)
11-06 12:27:43.758: W/System.err(31678): 
at org.apache.cordova.file.ContentFilesystem.openCursorForURL(ContentFilesystem.java:258)
11-06 12:27:43.758: W/System.err(31678): 
at org.apache.cordova.file.ContentFilesystem.getFileMetadataForLocalURL(ContentFilesystem.java:169)
11-06 12:27:43.758: W/System.err(31678): 
at org.apache.cordova.file.FileUtils.getFileMetadata(FileUtils.java:822)
11-06 12:27:43.758: W/System.err(31678): 
at org.apache.cordova.file.FileUtils.access$500(FileUtils.java:52)
11-06 12:27:43.758: W/System.err(31678): 
at org.apache.cordova.file.FileUtils$15.run(FileUtils.java:394)
11-06 12:27:43.758: W/System.err(31678): 
at org.apache.cordova.file.FileUtils$25.run(FileUtils.java:551)
11-06 12:27:43.758: W/System.err(31678): 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
11-06 12:27:43.758: W/System.err(31678): 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
11-06 12:27:43.758: W/System.err(31678): 
at java.lang.Thread.run(Thread.java:818)

Answer 1

这样做......按钮点击检查SDK版本

 if (Build.VERSION.SDK_INT >= 23){
    // Here, thisActivity is the current activity
                        if (ContextCompat.checkSelfPermission(MainActivity.this,
                                Manifest.permission.READ_EXTERNAL_STORAGE)
                                != PackageManager.PERMISSION_GRANTED) {

                            // Should we show an explanation?
                            if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,
                                    Manifest.permission.READ_EXTERNAL_STORAGE)) {

                                // Show an expanation to the user *asynchronously* -- don't block
                                // this thread waiting for the user's response! After the user
                                // sees the explanation, try again to request the permission.

                            } else {

                                // No explanation needed, we can request the permission.

                                ActivityCompat.requestPermissions(MainActivity.this,
                                        new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                                        MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);

                                // MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE is an
                                // app-defined int constant. The callback method gets the
                                // result of the request.
                            }
                        }else{
                            ActivityCompat.requestPermissions(MainActivity.this,
                                    new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                                    MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);
                        }
                    }else {

                        Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
                        photoPickerIntent.setType("image/*");
                        startActivityForResult(photoPickerIntent, SELECT_PHOTO);
                    }

之后在Override方法onRequestPermissionsResult中写下这段代码:

 case MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    // permission was granted, yay! Do the
                    // contacts-related task you need to do.
                    Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
                    photoPickerIntent.setType("image/*");
                    startActivityForResult(photoPickerIntent, SELECT_PHOTO);
                } else {

                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                }
                return;
            }

之后

@Override
    protected void onActivityResult(int reqCode, int resultCode, Intent data) {
        super.onActivityResult(reqCode, resultCode, data);

        switch (reqCode) {
 case SELECT_PHOTO:
                if (resultCode == RESULT_OK) {
                    try {
                        final Uri imageUri = data.getData();
                        final InputStream imageStream = getContentResolver().openInputStream(imageUri);
                        final Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);
                        contactimage.setImageBitmap(selectedImage);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }

                }

Answer 2

我相信你需要在运行时向用户请求权限(这是api 22到23中最显着的变化之一).

您可以尝试从Android开发者权限页面中提取的此代码段

if (Build.VERSION.SDK_INT >= 23){    
// Here, thisActivity is the current activity
    if (ContextCompat.checkSelfPermission(thisActivity,
                    Manifest.permission.READ_EXTERNAL_STORAGE)
            != PackageManager.PERMISSION_GRANTED) {

        // Should we show an explanation?
        if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
                Manifest.permission.READ_EXTERNAL_STORAGE)) {

            // Show an expanation to the user *asynchronously* -- don't block
            // this thread waiting for the user's response! After the user
            // sees the explanation, try again to request the permission.

        } else {

            // No explanation needed, we can request the permission.

            ActivityCompat.requestPermissions(thisActivity,
                    new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                    MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);

            // MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE is an
            // app-defined int constant. The callback method gets the
            // result of the request.
        }
    }
  }

如果有帮助,请告诉我.