Question

我需要在我的intent过滤器中访问存储，以便在Android 6.0应用程序中获取pdf文件或图像。

[IntentFilter(new[] { Intent.ActionOpenDocument, Intent.ActionView }, Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable }, DataMimeType = "application/pdf")]
[IntentFilter(new[] { Intent.ActionOpenDocument, Intent.ActionView }, Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable }, DataMimeType = "image/jpeg")]
[IntentFilter(new[] { Intent.ActionOpenDocument, Intent.ActionView }, Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable }, DataMimeType = "image/png")]

但是，它需要来自app的用户授予存储权限。

问题是这种情况是否有适当的POC，我可以阻止意图，显示警报，然后在完成基于授予/撤销许可的意图后完成？

目前我假设我只能显示一些没有权限的吐司，并轻轻地要求用户进入应用并手动启用权限（从某些自定义应用设置或其他任何设置）。

Answer 1

   private static final int REQUEST_RUNTIME_PERMISSION = 1;

     void checkPremission() {
            //Desired permission you want
            final String permission = Manifest.permission.CAMERA;
                // if in fragment use getActivity()

            if (ContextCompat.checkSelfPermission(ActivityName.this, permission)
                    != PackageManager.PERMISSION_GRANTED) {
                if (ActivityCompat.shouldShowRequestPermissionRationale(ActivityName.this, permission)) {

                } else {
                    ActivityCompat.requestPermissions(ActivityName.this, new String[]{permission}, REQUEST_CAMERA_PERMISSION);
                }
            } else {
                // you have permission go ahead

            }
        }

        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
            switch (requestCode) {
                case REQUEST_RUNTIME_PERMISSION:
                    final int numOfRequest = grantResults.length;
                    final boolean isGranted = numOfRequest == 1
                            && PackageManager.PERMISSION_GRANTED == grantResults[numOfRequest - 1];
                    if (isGranted) {
                        // you have permission go ahead
                    }else{
                        // you dont have permission show toast
                    }
                    break;
                default:
                    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
            }
        }

Answer 2

private void requestPermission() {

    int writePermission = ContextCompat.checkSelfPermission(
            MyActivity.this,
            Manifest.permission.WRITE_EXTERNAL_STORAGE);
    if (writePermission != PackageManager.PERMISSION_GRANTED) {

        // Should we show an explanation?
        // if (ActivityCompat.shouldShowRequestPermissionRationale(
        // MyActivity.this,
        // Manifest.permission.WRITE_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(
                        MyActivity.this,
                        new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                        MY_PERMISSIONS_WRITE_TO_EXTERNAL_STORAGE);

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

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_WRITE_TO_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
                // permission-related task you need to do.

            } else {

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

        // other 'case' lines to check for other
        // permissions this app might request
    }
}

我在这里使用了WRITE_EXTERNAL_STORAGE权限，因为它授予了读取和写入两者的权限。

调用您需要的requestPermission()方法，然后从您的设备获取pdf或图像。

希望这有帮助。

Answer 3

感谢您的回答，但也许我忘记在问题中提及它，但我标记了它 - 我正在寻找Xamarin技术的答案。

时间过去了，但是不久前，我们找到了解决方案。它更像是一段代码：

self.kwargs.get('pk', None)

Android 6.0运行时权限+意图过滤器

3 个答案: