试试这个

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。

Code 5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。 我得到的日志跟踪

注意：Android 5及以下版本的代码正常运行

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...... 按钮单击检查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中编写此代码：

 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

我相信您需要在运行时向用户请求权限（这是从api 22到23的最明显的变化之一）。

您可以尝试从Android Developers permission page

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。

Answer 3

要从Marshmallow中的图库中获取图像，您需要在运行时授予 READ_EXTERNAL_STORAGE 权限。 Android版本M已经改变了授予应用程序权限的方式。

在Marshmallow之前，所有必需的权限都会立即授予，即在安装时。但是在Marshmallow中，只有在需要该权限的情况下才会要求用户获得许可，并且用户必须允许或拒绝该权限。

以下两个链接将为您提供更多帮助。链接1来自Android的官方文档，而链接2是一个博客，用一个工作示例解释了这个问题。

Link1：http://developer.android.com/training/permissions/requesting.html

Link2：http://inthecheesefactory.com/blog/things-you-need-to-know-about-android-m-permission-developer-edition/en

Answer 4

我有同样的问题。使用

从图库中选取图像后，图像显示在Imageview中

Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, videoIdentifier);

并从URI

解码位图图像

但保存URI以备将来使用并重新打开应用程序并重新使用已保存的URI无效。无法从URI解码位图。

我通过从URI路径

中提取原始内容uri解决了这个问题

public String RemoveUnwantedString(String pathUri){
    //pathUri = "content://com.google.android.apps.photos.contentprovider/-1/2/content://media/external/video/media/5213/ORIGINAL/NONE/2106970034"
    String[] d1 = pathUri.split("content://");
    for (String item1:d1) {
        if (item1.contains("media/")) {
            String[] d2 = item1.split("/ORIGINAL/");
            for (String item2:d2) {
                if (item2.contains("media/")) {
                    pathUri = "content://" + item2;
                    break;
                }
            }
            break;
        }
    }
    //pathUri = "content://media/external/video/media/5213"
    return pathUri;
}

Answer 5

试试这个

这是我用其他例子创建的简单方法

调用CHECKGALLERYPERMISSION（）方法，将代码粘贴到方法

中

 private void CHECKGALLERYPERMISSION()
 {
    int MY_READ_PERMISSION_REQUEST_CODE =1 ;
    int PICK_IMAGE_REQUEST = 2;
    if (ContextCompat.checkSelfPermission(YourActivity.this, android.Manifest.permission.READ_EXTERNAL_STORAGE)== PackageManager.PERMISSION_GRANTED)
    {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
    }
    else
    {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
        {
            requestPermissions(
                    new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE},
                    MY_READ_PERMISSION_REQUEST_CODE);
        }
        else
        {
        }
    }
  }
  @Override
  public void onRequestPermissionsResult(int requestCode, String[] 
  permissions, int[] grantResults) {
   if (requestCode == MY_READ_PERMISSION_REQUEST_CODE
        && grantResults[0] == PackageManager.PERMISSION_GRANTED)
   {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
}
   }
  @Override
   public void onActivityResult(int requestCode, int resultCode, Intent data)
  {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null)
{
    Uri uri = data.getData();
    try
    {
        Bitmap bitmap = MediaStore.Images.Media.getBitmap(YourActivity.this.getContentResolver(), uri);
        imageview.setImageBitmap(bitmap);
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }
}
  }

注意

在fragement中使用getactivity（）而不是activity.this
如果android.Manifest.permission.READ_EXTERNAL_STORAGE无法正常工作，请将此更改为Manifest.permission.READ_EXTERNAL_STORAGE in all places

来自Android 6（Marshmallow）的Gallery中的图片

5 个答案:

试试这个

注意