已授予Android webview摄像头和麦克风权限，但无法访问

Question

@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里

无法通知WebView/VideoCapabilities：无法识别的配置文件2130706434用于视频/AVC W/VideoCapabilities：不支持的mime视频/Divx W/VideoCapilities：不支持的mime视频/Divx4 W/VideoCapilities：不支持的mime视频/MP4V-ESDP W/VideoCapilities：不支持的配置文件4用于视频/MP4V-ES I/CameramanagerGlobal:连接到摄像机服务W/CR_Media:需要MODIFY_AUDIO_SETTINGS和record_audio。没有音频设备可用于使用/cr_media录制：需要MODIFY_AUDIO_SETTINGS和record_audio。没有音频设备可用于录制

Answer 1

您不能在webView中直接使用麦克风和摄像机，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。

在清单文件中添加这些权限，使用

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

然后使用webView客户端类中的OnPermissionRequest方法请求权限（在您的示例中为MyCustomWebChromeclient