java.lang.SecurityException:

Question

我制作了一个应用程序，当我单击一个按钮时，当我 select 我希望它显示在我的屏幕上的图像时，但是当我 select 我想要的照片时，我得到一个运行时说

 Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/images/media/59 from pid=9364, uid=10055 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()

我的代码是休闲的

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == SELECT_PICTURE) {
            Uri selectedImageUri = data.getData();
            selectedImagePath = getPath(selectedImageUri);
            System.out.println("Image Path : " + selectedImagePath);
            img.setImageURI(selectedImageUri);
        }
    }
}


public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}

Answer 1

你需要添加

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

在清单文件的 <manifest> 标签下

Answer 2

android 6.0 也会出现这种情况吗？然后，您还必须获得运行时权限。 预棉花糖-

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> in the android manifest file.

Marshmallow及以上版本(目标SDK)- 您应该使用以下方法检查用户是否已授予外部存储权限：

    public  boolean haveStoragePermissions() {
    if (Build.VERSION.SDK_INT >= 23) {
        if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
                == PackageManager.PERMISSION_GRANTED) {
            Log.v(TAG,"Permission is granted");
            return true;
        } else {

            Log.v(TAG,"Permission is revoked");
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
            return false;
        }
    }
    else { //permission is automatically granted on sdk<23 upon installation
        Log.v(TAG,"Permission is granted");
        return true;
    }
}

然后让你的 activity 实现 OnRequestPermissionResult-

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if(grantResults[0]== PackageManager.PERMISSION_GRANTED){
        Log.v(TAG,"Permission: "+permissions[0]+ "was "+grantResults[0]);
        //resume tasks needing this permission
    }
}

Answer 3

您必须在清单文件中添加权限，在清单标记的下面一行添加显现

java.lang.SecurityException:

java.lang.SecurityException:

java

android

android-gallery

android-studio