Неизвестная ошибка использования камеры permission denied

Данный код отлично работает с камерой в версиях андроида ниже 6.0. Но с версией 6.0 выдаёт ошибку в использование камеры. Как можно исправить эту ошибку?

public class MainActivity extends AppCompatActivity {
private final String TAG = this.getClass().getName();

ImageView ivCamera, ivGallery, ivUpload, ivImage;

CameraPhoto cameraPhoto;
GalleryPhoto galleryPhoto;

final int CAMERA_REQUEST = 13323;
final int GALLERY_REQUEST = 22131;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });

    cameraPhoto = new CameraPhoto(getApplicationContext());
    galleryPhoto = new GalleryPhoto(getApplicationContext());

    ivImage = (ImageView)findViewById(R.id.ivImage);
    ivCamera = (ImageView)findViewById(R.id.ivCamera);
    ivGallery = (ImageView)findViewById(R.id.ivGallery);
    ivUpload = (ImageView)findViewById(R.id.ivUpload);

    ivCamera.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {



            try {
                startActivityForResult(cameraPhoto.takePhotoIntent(), CAMERA_REQUEST);
                cameraPhoto.addToGallery();

            } catch (IOException e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(),
                        "Something Wrong while taking photos", Toast.LENGTH_SHORT).show();
            }
        }
    });

    ivGallery.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivityForResult(galleryPhoto.openGalleryIntent(), GALLERY_REQUEST);
        }
    });

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(resultCode == RESULT_OK){
        if(requestCode == CAMERA_REQUEST){
            String photoPath = cameraPhoto.getPhotoPath();
            try {
                Bitmap bitmap = ImageLoader.init().from(photoPath).requestSize(512, 512).getBitmap();
                ivImage.setImageBitmap(bitmap);
            } catch (FileNotFoundException e) {
                Toast.makeText(getApplicationContext(),
                        "Something Wrong while loading photos", Toast.LENGTH_SHORT).show();
            }

        }
        else if(requestCode == GALLERY_REQUEST){
            Uri uri = data.getData();

            galleryPhoto.setPhotoUri(uri);
            String photoPath = galleryPhoto.getPath();
            try {
                Bitmap bitmap = ImageLoader.init().from(photoPath).requestSize(512, 512).getBitmap();
                ivImage.setImageBitmap(bitmap);
            } catch (FileNotFoundException e) {
                Toast.makeText(getApplicationContext(),
                        "Something Wrong while choosing photos", Toast.LENGTH_SHORT).show();
            }
        }
    }
  }
 }

I have created WebView Activity and loading https://web.doar.zone/coronavirus

This URL required Camera permission which I had taken Runtime Permission in Android.

Here is the full code of MainActivity.java:

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    Context context;

    ActivityMainBinding binding;

    private String url = "https://web.doar.zone/coronavirus";

    @Override
    protected void onResume() {
        super.onResume();
        checkCameraPermission();
    }

    private void checkCameraPermission() {
        int writeExternalStorage = ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
        if (writeExternalStorage != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1001);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 1001) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //Do your stuff
                openWebView();
            } else {
                checkCameraPermission();
            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        context = getApplicationContext();

        openWebView();
    }

    @SuppressLint("SetJavaScriptEnabled")
    void openWebView() {

        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        final NetworkInfo networkInfo;
        if (connectivityManager != null) {
            networkInfo = connectivityManager.getActiveNetworkInfo();
            if (networkInfo != null && networkInfo.isConnectedOrConnecting()) {
                binding.internetTextView.setVisibility(View.INVISIBLE);
                binding.webView.setVisibility(View.VISIBLE);
                //binding.webView.getSettings().setUserAgentString("Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.3");
                binding.webView.getSettings().setJavaScriptEnabled(true);
                binding.webView.getSettings().setUseWideViewPort(true);
                binding.webView.getSettings().setDomStorageEnabled(true);
                binding.webView.setInitialScale(1);
                binding.webView.setWebChromeClient(new MyWebChromeClient());
                binding.webView.setWebViewClient(new WebViewClient() {

                    @Override
                    public boolean shouldOverrideUrlLoading(WebView webview, String url) {
                        Uri uri = Uri.parse(url);
                        if (uri.getScheme().contains("whatsapp") || uri.getScheme().contains("tel")) {
                            try {
                                Intent intent = Intent.parseUri(url, Intent.URI_INTENT_SCHEME);
                                if (intent.resolveActivity(getPackageManager()) != null)
                                    startActivity(intent);
                                return true;
                            } catch (URISyntaxException use) {
                                Log.e("TAG", use.getMessage());
                            }
                        } else {
                            webview.loadUrl(url);
                        }

                        return true;
                    }

                    @Override
                    public void onPageFinished(WebView view, String url) {
                        super.onPageFinished(view, url);
                    }
                });
                binding.webView.loadUrl(url);
            } else {

                binding.internetTextView.setVisibility(View.VISIBLE);
                binding.buttonTryAgain.setVisibility(View.VISIBLE);
                binding.webView.setVisibility(View.INVISIBLE);

                Toast.makeText(context, "Connect to Internet and Refresh Again", Toast.LENGTH_LONG).show();
            }
        } else {
            binding.internetTextView.setVisibility(View.VISIBLE);
            binding.buttonTryAgain.setVisibility(View.VISIBLE);
            binding.webView.setVisibility(View.INVISIBLE);

            Toast.makeText(context, "Connect to Internet and Refresh Again", Toast.LENGTH_LONG).show();
        }
    }


    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            if (keyCode == KeyEvent.KEYCODE_BACK) {
                if (binding.webView.canGoBack()) {
                    binding.webView.goBack();
                } else {
                    finish();
                }
                return true;
            }

        }
        return super.onKeyDown(keyCode, event);
    }

    class MyWebChromeClient extends WebChromeClient {

        MyWebChromeClient() {
            // TODO Auto-generated constructor stub
            binding.pb.setProgress(0);
        }

        @Override
        public void onPermissionRequest(final PermissionRequest request) {
            super.onPermissionRequest(request);
            //request.grant(request.getResources());
        }

        public void onProgressChanged(WebView view, int progress) {
            if (progress < 100  /* && pBar.getVisibility() == View.VISIBLE*/) {
                binding.pb.setVisibility(View.VISIBLE);
            }
            binding.pb.setProgress(progress);
            if (progress == 100) {
                binding.pb.setVisibility(View.GONE);
            }
        }
    }
}

Now I am getting error as below When I comment this line:

request.grant(request.getResources());

And If I uncomment this line then I am getting:

 java.lang.IllegalStateException: Either grant() or deny() has been already called.
    at org.chromium.android_webview.permission.AwPermissionRequest.c(PG:3)
    at org.chromium.android_webview.permission.AwPermissionRequest.b(PG:1)
    at Cn.grant(PG:8)
    at com.example.webviewapp.MainActivity$MyWebChromeClient.onPermissionRequest(MainActivity.java:164)
    at org.chromium.android_webview.AwContents.onPermissionRequest(PG:8)
    at android.os.MessageQueue.nativePollOnce(Native Method)
    at android.os.MessageQueue.next(MessageQueue.java:326)
    at android.os.Looper.loop(Looper.java:181)
    at android.app.ActivityThread.main(ActivityThread.java:7078)
2020-04-29 11:52:21.813 4943-4943/com.example.webviewapp W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)

Any Help?

I have created WebView Activity and loading https://web.doar.zone/coronavirus

This URL required Camera permission which I had taken Runtime Permission in Android.

Here is the full code of MainActivity.java:

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    Context context;

    ActivityMainBinding binding;

    private String url = "https://web.doar.zone/coronavirus";

    @Override
    protected void onResume() {
        super.onResume();
        checkCameraPermission();
    }

    private void checkCameraPermission() {
        int writeExternalStorage = ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
        if (writeExternalStorage != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1001);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 1001) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //Do your stuff
                openWebView();
            } else {
                checkCameraPermission();
            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        context = getApplicationContext();

        openWebView();
    }

    @SuppressLint("SetJavaScriptEnabled")
    void openWebView() {

        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        final NetworkInfo networkInfo;
        if (connectivityManager != null) {
            networkInfo = connectivityManager.getActiveNetworkInfo();
            if (networkInfo != null && networkInfo.isConnectedOrConnecting()) {
                binding.internetTextView.setVisibility(View.INVISIBLE);
                binding.webView.setVisibility(View.VISIBLE);
                //binding.webView.getSettings().setUserAgentString("Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.3");
                binding.webView.getSettings().setJavaScriptEnabled(true);
                binding.webView.getSettings().setUseWideViewPort(true);
                binding.webView.getSettings().setDomStorageEnabled(true);
                binding.webView.setInitialScale(1);
                binding.webView.setWebChromeClient(new MyWebChromeClient());
                binding.webView.setWebViewClient(new WebViewClient() {

                    @Override
                    public boolean shouldOverrideUrlLoading(WebView webview, String url) {
                        Uri uri = Uri.parse(url);
                        if (uri.getScheme().contains("whatsapp") || uri.getScheme().contains("tel")) {
                            try {
                                Intent intent = Intent.parseUri(url, Intent.URI_INTENT_SCHEME);
                                if (intent.resolveActivity(getPackageManager()) != null)
                                    startActivity(intent);
                                return true;
                            } catch (URISyntaxException use) {
                                Log.e("TAG", use.getMessage());
                            }
                        } else {
                            webview.loadUrl(url);
                        }

                        return true;
                    }

                    @Override
                    public void onPageFinished(WebView view, String url) {
                        super.onPageFinished(view, url);
                    }
                });
                binding.webView.loadUrl(url);
            } else {

                binding.internetTextView.setVisibility(View.VISIBLE);
                binding.buttonTryAgain.setVisibility(View.VISIBLE);
                binding.webView.setVisibility(View.INVISIBLE);

                Toast.makeText(context, "Connect to Internet and Refresh Again", Toast.LENGTH_LONG).show();
            }
        } else {
            binding.internetTextView.setVisibility(View.VISIBLE);
            binding.buttonTryAgain.setVisibility(View.VISIBLE);
            binding.webView.setVisibility(View.INVISIBLE);

            Toast.makeText(context, "Connect to Internet and Refresh Again", Toast.LENGTH_LONG).show();
        }
    }


    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            if (keyCode == KeyEvent.KEYCODE_BACK) {
                if (binding.webView.canGoBack()) {
                    binding.webView.goBack();
                } else {
                    finish();
                }
                return true;
            }

        }
        return super.onKeyDown(keyCode, event);
    }

    class MyWebChromeClient extends WebChromeClient {

        MyWebChromeClient() {
            // TODO Auto-generated constructor stub
            binding.pb.setProgress(0);
        }

        @Override
        public void onPermissionRequest(final PermissionRequest request) {
            super.onPermissionRequest(request);
            //request.grant(request.getResources());
        }

        public void onProgressChanged(WebView view, int progress) {
            if (progress < 100  /* && pBar.getVisibility() == View.VISIBLE*/) {
                binding.pb.setVisibility(View.VISIBLE);
            }
            binding.pb.setProgress(progress);
            if (progress == 100) {
                binding.pb.setVisibility(View.GONE);
            }
        }
    }
}

Now I am getting error as below When I comment this line:

request.grant(request.getResources());

And If I uncomment this line then I am getting:

 java.lang.IllegalStateException: Either grant() or deny() has been already called.
    at org.chromium.android_webview.permission.AwPermissionRequest.c(PG:3)
    at org.chromium.android_webview.permission.AwPermissionRequest.b(PG:1)
    at Cn.grant(PG:8)
    at com.example.webviewapp.MainActivity$MyWebChromeClient.onPermissionRequest(MainActivity.java:164)
    at org.chromium.android_webview.AwContents.onPermissionRequest(PG:8)
    at android.os.MessageQueue.nativePollOnce(Native Method)
    at android.os.MessageQueue.next(MessageQueue.java:326)
    at android.os.Looper.loop(Looper.java:181)
    at android.app.ActivityThread.main(ActivityThread.java:7078)
2020-04-29 11:52:21.813 4943-4943/com.example.webviewapp W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)

Any Help?

There are two types of permission.

Normal permission (does not need to ask from user)
Dangerous permissions (need to be asked)

В вашем манифесте есть 3 опасное разрешение.

<uses-permission android:name = "android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name = "android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name = "android.permission.CAMERA" />

См. нормальное и опасное разрешение в документации Android.

Вы должны ввести код для запроса разрешения.

Спроси разрешение

 ActivityCompat.requestPermissions(MainActivity.this,
                    new String[]{Manifest.permission.CAMERA},
                    1);

Обработайте результат

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 1: {

          // 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.          
            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                Toast.makeText(MainActivity.this, "Permission denied", Toast.LENGTH_SHORT).show();
            }
            return;
        }

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

Кончик:

Если вы не хотите много писать для запроса разрешения в разных классах. Воспользуйтесь какой-нибудь библиотекой. Нравиться

• https://github.com/tbruyelle/RxPermissions
• https://github.com/Karumi/Dexter

Я использую RxPermissions. Которые обеспечивают простую функцию.

rxPermissions
    .request(Manifest.permission.CAMERA)
    .subscribe(granted -> {
        if (granted) { // Always true pre-M
           // I can control the camera now
        } else {
           // Oups permission denied
        }
    });

См. конфигурация для RxPermission

Более подробная информация: https://developer.android.com/training/permissions/requesting.html

Я хотел бы использовать веб-камеру моего старого ноутбука (мой ноутбук — Packard Bell EasyNote MX37), чтобы делать потоковое видео.

Я пытаюсь сделать это потоковое видео через VLC, следуя этому руководству от Ubuntu 14.04 LTS.

К сожалению, я застреваю, когда я применяю эту командную строку:

cvlc v4l2:///dev/video0 :v4l2-standard= :input-slave=alsa://hw:0,0
:live-caching=300
:sout="#transcode{vcodec=WMV2,vb=800,acodec=wma2,ab=128,channels=2,samplerate=44100}:http{dst=:8080/stream.wmv}"

В самом деле, я получаю это сообщение об ошибке:

VLC media player 2.1.6 Rincewind (revision 2.1.6-0-gea01d28)
[0x19....] dummy interface: using the dummy interface module...
[0x7f1................] main access out error: socket bind error (Permission denied)
[0x7f1................] main access out error: socket bind error (Permission denied)
[0x7f1................] main access out error: cannot create socket(s) for HTTP host
[0x7f1................] access_output_http access out error: cannot start HTTP server
[0x7f1................] stream_out_standard stream out error: no suitable sout access module for 'http/asf://:8080/stream.wmv'
[0x7f1................] main stream output error: stream chain failed for 'transcode{vcodec=WMV2,vb=800,acodec=wma2,ab=128,channels=2,samplerate=44100}:http{dst=:8080/stream.wmv}'
[0x7f1................] main input error: cannot start stream output instance, aborting

Большое спасибо за вашу помощь!

PS: Цель состоит в том, чтобы следить за моей парковкой.