Question

我是这个Android webview的新手。我正在创建的应用程序具有摄像头和麦克风访问权限。

已授予camera和microphone的权限，但是在尝试打开相机时，相机没有打开。

该网站在移动设备以及台式机浏览器中均可正常运行，但在我的应用中无法打开。请帮我解决这个问题。我有什么想念的吗？

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

    if (requestCode == MY_PERMISSION_REQUEST_CAMERA || requestCode == MY_PERMISSIONS_REQUEST_RECORD_AUDIO) {
        if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(MainActivity.this, "permission granted", Toast.LENGTH_SHORT).show();

        } else {
            Toast.makeText(MainActivity.this, "permission not granted", Toast.LENGTH_SHORT).show();
        }
    }
}

@SuppressLint({"SetJavaScriptEnabled", "ClickableViewAccessibility"})
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mContext = this.getApplicationContext();

    if (!isTaskRoot()) {
        finish();
        return;
    }



    myWebView = findViewById(R.id.myWebView);
    myWebView.getSettings().setJavaScriptEnabled(true);
    myWebView.setWebViewClient(new WebViewClient());
    myWebView.setWebViewClient(new MyCustomWebViewClient());



    myWebView.setWebChromeClient(new WebChromeClient());


    myWebView.setWebChromeClient(new MyCustomWebChromeClient());
    myWebView.getSettings().setDomStorageEnabled(true);
    myWebView.loadUrl("https://www.skaplink.com");

    myWebView.getSettings().setUserAgentString(userAgent);

    /*String permission1 = Manifest.permission.CAMERA;
    String permission2 = Manifest.permission.RECORD_AUDIO;
    String permission3 = Manifest.permission.MODIFY_AUDIO_SETTINGS;
    int grant1 = ContextCompat.checkSelfPermission(this, permission1);
    int grant2 = ContextCompat.checkSelfPermission(this, permission2);
    ContextCompat.checkSelfPermission(this, permission3);

    if (grant1 != PackageManager.PERMISSION_GRANTED && grant2 != PackageManager.PERMISSION_GRANTED) {

        String[] permission_list = new String[2];
        permission_list[0] = permission1;
        permission_list[1] = permission2;
        ActivityCompat.requestPermissions(this, permission_list, 1);
        ActivityCompat.requestPermissions(this, permission_list, 2);
        Log.d("Granting Process", "Done");
    }*/
    permission();
}


void permission() {

    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
        Toast.makeText(MainActivity.this, "You already granted the permission", Toast.LENGTH_SHORT).show();
    } else {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, MY_PERMISSION_REQUEST_CAMERA);
    }

    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED) {
        Toast.makeText(MainActivity.this, "You already granted the permission", Toast.LENGTH_SHORT).show();
    } else {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, MY_PERMISSIONS_REQUEST_RECORD_AUDIO);
    }
}

这些显示在我的logcat中

无法通知具有视频功能的WebView：无法识别的配置文件 2130706434用于视频/ AVC W / VideoCapabilities：不支持的mime video / divx W / VideoCapabilities：不支持的mime video / divx4 W / VideoCapabilities：不支持的mime video / mp4v-esdp W / VideoCapabilities：不支持的mime video / mp4v-esdp I / VideoCapabilities：视频/ mp4v-es的不受支持的配置文件4 I / CameraManagerGlobal：连接到摄像头服务W / cr_media：需要MODIFY_AUDIO_SETTINGS和RECORD_AUDIO。没有音频设备会可用于录制W / cr_media：需要MODIFY_AUDIO_SETTINGS 和RECORD_AUDIO。没有音频设备可用于录制

Answer 1

您不能直接将麦克风和摄像头与webView一起使用，因为您需要添加额外的权限MODIFY_AUDIO_SETTINGS和RECORD_AUDIO，然后只有您才能访问这些功能。

使用清单文件添加这些权限

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

然后在onPermissionRequest的情况下，使用webView客户端类中的MyCustomWebChromeClient方法请求权限

Answer 2

您似乎已从用户那里获得了运行时权限，但未授予WebChromeClient的权限，请添加以下代码，即可解决问题

 webView.setWebChromeClient(new WebChromeClient(){
        @Override
        public void onPermissionRequest(final PermissionRequest request) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    request.grant(request.getResources());
                }
            });

        }

已授予Android Webview摄像头和麦克风权限，但无法访问

2 个答案: