日期	版本	修订内容摘要
2024-07-10	v2.0.0	更新接口文档

app 调不起来摄像头

app 未开启摄像头的权限

1、android

package com.chuanglan.webtest;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.annotation.TargetApi;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.webkit.CookieManager;
import android.webkit.PermissionRequest;
import android.webkit.SslErrorHandler;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;

public class MainActivity extends AppCompatActivity {
    private WebView mWebView;
    private static final int PERMISSIONS_EXTERNAL_STORAGE = 801;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if ((ContextCompat.checkSelfPermission(
                this.getApplication(),
                Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) &&
                (ContextCompat.checkSelfPermission(this.getApplication(), Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED)) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO}, PERMISSIONS_EXTERNAL_STORAGE);
        } else {
            this.initData();
        }
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, PERMISSIONS_EXTERNAL_STORAGE);
        }
        ActivityCompat.requestPermissions(MainActivity.this,
                new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA},
                PERMISSIONS_EXTERNAL_STORAGE);
        initData();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String[] permissions, int[] grantResults) {
        if (grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        }
        this.initData();
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
    private void initData() {
        String url = "https://static2.253.com/sdk-demo/index22.html";
        mWebView = findViewById(R.id.shanyan_view_baseweb_webview);
        WebSettings webSetting = mWebView.getSettings();
        // 禁止 file 协议加载 JavaScript

        webSetting.setAllowFileAccess(true);
        webSetting.setJavaScriptEnabled(true);
        webSetting.setAllowFileAccessFromFileURLs(true);
        webSetting.setAllowUniversalAccessFromFileURLs(true);

        webSetting.setUseWideViewPort(true);
        webSetting.setLoadWithOverviewMode(true);
        if (Build.VERSION.SDK_INT < 17) {
            mWebView.removeJavascriptInterface("searchBoxJavaBridge_");
            mWebView.removeJavascriptInterface("accessibility");
            mWebView.removeJavascriptInterface("accessibilityTraversal");
        }
        webSetting.setSupportZoom(true);
        webSetting.setSavePassword(false);
        webSetting.setBuiltInZoomControls(true);
        webSetting.setCacheMode(WebSettings.LOAD_NO_CACHE);
        webSetting.setSupportMultipleWindows(true);
        webSetting.setJavaScriptCanOpenWindowsAutomatically(true);
        webSetting.setDomStorageEnabled(true);
        webSetting.setPluginState(WebSettings.PluginState.ON);
        mWebView.setWebViewClient(new MyWebViewClient());
        mWebView.setWebChromeClient(new WebChromeClient() {
            @Override
            public void onPermissionRequest(final PermissionRequest request) {
                request.grant(request.getResources());
            }

        });
          CookieManager cookieManager = CookieManager.getInstance();
        cookieManager.setAcceptThirdPartyCookies(mWebView, true);

        mWebView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
        mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
        mWebView.getSettings().setAllowFileAccessFromFileURLs(true);
        mWebView.getSettings().setAllowUniversalAccessFromFileURLs(true);
        mWebView.getSettings().setMediaPlaybackRequiresUserGesture(false);
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.getSettings().setSaveFormData(true);
        mWebView.getSettings().setSupportZoom(false);
        mWebView.getSettings().setDomStorageEnabled(true);
        initData(url);
    }

    private void initData(String url) {
        mWebView.loadUrl(url);
    }

    class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }

        @Override
        public void onReceivedSslError(WebView view, final SslErrorHandler handler, android.net.http.SslError error) {
            handler.cancel();
        }

        @Override
        public boolean shouldOverrideKeyEvent(WebView view, KeyEvent event) {
            return super.shouldOverrideKeyEvent(view, event);
        }
    }
}

关注

        mWebView.setWebChromeClient(new WebChromeClient() {
            @Override
            public void onPermissionRequest(final PermissionRequest request) {
                request.grant(request.getResources());
            }

        });

2、IOS

WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
    config.mediaTypesRequiringUserActionForPlayback = WKAudiovisualMediaTypeNone;
    config.allowsInlineMediaPlayback = YES;
    /// 这里需要将属性设置在初始化的WKWebViewConfiguration对象上，
    /// 因为_webview. configuration为原始对象拷贝的原因，所以通过以下方式设置相应属性并不会生效:
    _webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:config];