问题描述

我有一个 ImageView.当您单击 ImageView 时，它会打开图库，然后您会选择一张图像并将其显示在 ImageView 上.我有一个条件，当我关闭我的应用程序然后打开它时，图像将保留在那里.因此，为此，我将图像 Uri 存储在 sharedprefrence 上.在打开应用程序时，我正在检索相同的 Uri 并尝试在 imageView 上显示图像.

I have an ImageView. When you click on a ImageView, it will open gallery and you pick up a image and show it on ImageView. I have a condition that when I close my app and then I open it, the image will retain there . So for that, I am storing image Uri on sharedprefrence. And on opening the application i am retrieving the same Uri and tries to display the image on imageView.

但是在某些手机中 - 图像看起来很完美，例如 Mi(Lollipop)、Samsung(KitKat)但它不会出现在摩托罗拉(Marshmallow)、一加一(Marshmallow)等手机中.知道为什么会这样吗?这是我的代码

However in some phones - image appears perfect like Mi(Lollipop), Samsung(KitKat) but it doesn't appear in phones like - Motorola(Marshmallow) ,One Plus One (Marshmallow). Any idea why it's happening ? Here is my code

为了拾取我正在使用的图像

For picking up an image i am using

Intent intent=new Intent();intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), Constants.SELECT_PICTURE);

OnActivityResult() 代码是

And on OnActivityResult() code is

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

     if(requestCode==Constants.SELECT_PICTURE && resultCode==RESULT_OK && null!=data) {
         Uri uri=data.getData();
         Picasso.with(UsersProfileActivity.this)
             .load(uri)
             .centerCrop()
             .resize(200,200)
             .into(img_photo);

         // This profile image i am storing into a sharedpreference        
         profile_image=uri.toString();
     }

在从 sharedprefrence 检索时，我使用 Uri.parse(profile_image)

And while retrieving from sharedprefrence I convert String to uri by using Uri.parse(profile_image)

但是，如果我注意到，不同安卓手机的 uri 返回如下

However if I notice, uri returns for different android phone is as follows

Mi(Lollipop)- Uri=content://media/external/images/media/12415
samsung(KitKat)-Uri=content://media/external/images/media/786
Motorola(Marshmallow)- Uri=content://com.android.providers.media.documents/document/image%3A30731
One Plus One (Marshmallow)- Uri=content://com.android.providers.media.documents/document/image%3A475

因此，当 uri 内容为 -content://media/external/images/media/时在 ImageView Perfect 上显示图像，而在其他情况下则不是

Hence when uri content is -content://media/external/images/media/ is display image on ImageView Perfect and in other cases it is not

推荐答案

试试这个

我开发并测试过并正在努力

I developed and tested and working on

1. Lenovo K3 Note(棉花糖)
2. 摩托罗拉(棒棒糖)
3. 三星(奇巧)

在你的 MainActivity.java 添加

    profilePicture = (ImageView)findViewById(R.id.imgProfilePicture);
    sharedPreferences = getSharedPreferences(getString(R.string.app_name)+"_ProfileDetails",MODE_PRIVATE);

    // get uri from shared preference
    String profilePicUri = sharedPreferences.getString("profilePicUrl","");

    // if uri not found
    if (profilePicUri.equalsIgnoreCase("")){
        // code for open gallery to select image
        Intent intent;
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
            intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
            intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
            intent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
        }else{
            intent = new Intent(Intent.ACTION_GET_CONTENT);
        }
        intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        intent.setType("image/*");

        startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURE_CONSTANT);
    }else{
        try{
            final int takeFlags =  (Intent.FLAG_GRANT_READ_URI_PERMISSION
                    | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
            // Check for the freshest data.
            getContentResolver().takePersistableUriPermission(Uri.parse(profilePicUri), takeFlags);
            // convert uri to bitmap
            Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), Uri.parse(profilePicUri));
            // set bitmap to imageview
            profilePicture.setImageBitmap(bitmap);
        }
        catch (Exception e){
            //handle exception
            e.printStackTrace();
        }
    }

现在处理 onActivityResult.

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == SELECT_PICTURE_CONSTANT && resultCode == RESULT_OK && null != data) {
        Uri uri = data.getData();
        // This profile image i am storing into a sharedpreference
        SharedPreferences.Editor editor = sharedPreferences.edit();
        // save uri to shared preference
        editor.putString("profilePicUrl",uri.toString());
        editor.commit();
        profilePicture.setImageURI(uri);
    }
}

在您的 Manifest 文件中添加 permission

In your Manifest file add permission

<uses-permission android:name="android.permission.MANAGE_DOCUMENTS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

注意:

假设您为 Marshmallow

结果 Uri

lenovo K3 注意:content://com.android.externalstorage.documents/document/primary%3ADCIM%2FCamera%2FIMG_20160606_212815.jpg

三星:content://com.android.providers.media.documents/document/image%3A2086

摩托罗拉:content://com.android.providers.media.documents/document/image%3A15828

这篇关于图像 uri 在某些 android 设备上的 ImageView 上不显示图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！