java - Android webview摄像头和麦克风权限已授予但无法访问

Question

我是这个 Android webview 的新手。我正在创建的应用程序可以访问相机和麦克风。

相机和麦克风的权限已获得，但当尝试打开相机时，它没有打开。

该网站在移动设备和桌面浏览器中都能正常运行，但在我的应用程序中无法打开。请帮我解决这个问题。我有什么遗漏的吗？

@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

Failed to notify a WebView W/VideoCapabilities: Unrecognized profile 2130706434 for video/avc W/VideoCapabilities: Unsupported mime video/divx W/VideoCapabilities: Unsupported mime video/divx4 W/VideoCapabilities: Unsupported mime video/mp4v-esdp W/VideoCapabilities: Unsupported mime video/mp4v-esdp I/VideoCapabilities: Unsupported profile 4 for video/mp4v-es I/CameraManagerGlobal: Connecting to camera service W/cr_media: Requires MODIFY_AUDIO_SETTINGS and RECORD_AUDIO. No audio device will be available for recording W/cr_media: Requires MODIFY_AUDIO_SETTINGS and RECORD_AUDIO. No audio device will be available for recording

Answer 1

您不能直接在 webView 中使用麦克风和摄像头，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。

使用以下命令在 list 文件中添加这些权限

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

然后在您的情况下使用 webView 客户端类中的 onPermissionRequest 方法请求许可，即 MyCustomWebChromeClient