权限拒绝：开放提供者 com.android.providers.media.MediaDocumentsProvider

Question

我正在尝试允许用户访问他的照片库以获取个人资料图片，并将该个人资料图片保存到 SharedPreferences。 我还有一个导航栏，可以从 SharedPreferences 获取这张图片

我收到以下错误：

java.lang.SecurityException: 
Permission Denial: opening provider com.android.providers.media.MediaDocumentsProvider from ProcessRecord
{a601c1c 3379:com.example.foo.finalapp/u0a60} (pid=3379, uid=10060) requires android.permission.MANAGE_DOCUMENTS or android.permission.MANAGE_DOCUMENTS

下面是获取图片的代码：

主要活动

       ImageView prof_pic = (ImageView) header.findViewById(R.id.profPic);
        pref = getSharedPreferences(Profile.pref_filename, 0);
        String uri = pref.getString("target_uri", "");
        TextView tv_name = (TextView) header.findViewById(R.id.tv_name);
        String name = pref.getString("name", "");
        if(!uri.equals("")) {
            Uri urii = Uri.parse(uri);
            try {
                Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(urii));
                tv_name.setText(name);
                prof_pic.setImageBitmap(bitmap);
            } catch (FileNotFoundException e) {

            }
        }
        else {
            prof_pic.setImageResource(R.drawable.ic_android_black_24dp);
        }
    }

profile_pic.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                /*
                Intent intent = new Intent(Intent.ACTION_PICK,
                        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(intent, 0);
                */
                Intent intent;

                if (Build.VERSION.SDK_INT < 19) {
                    intent = new Intent();
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    intent.setType("*/*");
                    startActivityForResult(intent, KITKAT_VALUE);
                } else {
                    intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
                    intent.addCategory(Intent.CATEGORY_OPENABLE);
                    intent.setType("*/*");
                    startActivityForResult(intent, KITKAT_VALUE);
                }
            }
        });

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == KITKAT_VALUE) {
            if (resultCode == RESULT_OK) {
                targetUri = data.getData();
                //Bitmap bitmap;
                try {
                    bitmap = BitmapFactory.decodeStream(getActivity().getContentResolver().openInputStream(targetUri));
                /*
                SharedPreferences.Editor edit = pref.edit();
                edit.putString("target_uri", targetUri.toString());
                edit.apply();
                */
                    sTargetUri = targetUri.toString();
                    profile_pic.setImageBitmap(bitmap);
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

这是我的清单

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.finalapp">

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".JobViewActivity"></activity>
    </application>

</manifest>

Answer 1

public static final int GALLERY_INTENT_CALLED = 1;
    public static final int GALLERY_KITKAT_INTENT_CALLED = 2;

if (Build.VERSION.SDK_INT <19){
                    Intent intent = new Intent();
                    intent.setType("*/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    startActivityForResult(intent, GALLERY_INTENT_CALLED);
                } else {
                    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
                    intent.addCategory(Intent.CATEGORY_OPENABLE);
                    intent.setType("*/*");
                    startActivityForResult(intent, GALLERY_KITKAT_INTENT_CALLED);
                }



public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
            if (resultCode == RESULT_OK) {
                Uri originalUri = null;
                if (Build.VERSION.SDK_INT < 19) {
                    originalUri = data.getData();
                } else {
                    originalUri = data.getData();
                    final int takeFlags = data.getFlags()
                            & (Intent.FLAG_GRANT_READ_URI_PERMISSION
                            | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

                    try {
                        getActivity().getContentResolver().takePersistableUriPermission(originalUri, takeFlags);
                    }
                    catch (SecurityException e){
                        e.printStackTrace();
                    }
                }
                try {
                    bitmap = BitmapFactory.decodeStream(getActivity().getContentResolver().openInputStream(originalUri));
...

Answer 2

在我的情况下，我设备中的图像资源文件被删除，android系统找不到正确的路径。 清除我的房间数据库并再次运行应用程序解决了这个问题。

Answer 3

一旦第一个 URI 打开并成功运行：

getContentResolver().takePersistableUriPermission(myURI, (Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION));

为了保存读写权限。