Android APP WebView 为 H5动态授权 H5获取APP权限

本是古典何须时尚 2024-03-30 13:20 220阅读 0赞

前言：平时项目开发时，有时H5需要APP的一些动态权限，Web已支持该需求

下面代码介绍下：

首先创建一个Activity:

1. 布局XML:

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/white"
        android:orientation="vertical">
        
        <WebView
            android:id="@+id/webView"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    
    
    </RelativeLayout>

2.Activity 代码：

public class WebViewActivity extends AppCompatActivity {
    
        private WebView mWebView;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_webview);
            mWebView = findViewById(R.id.webView);
    
            mWebView.setWebChromeClient(webChromeClient);
            mWebView.getSettings().setJavaScriptEnabled(true);
            mWebView.setInitialScale(25);
            WebSettings webSettings = mWebView.getSettings();
            webSettings.setJavaScriptEnabled(true);
            webSettings.setDomStorageEnabled(true);
            webSettings.setDatabaseEnabled(true);
            webSettings.setAllowFileAccess(true);
            webSettings.setAppCacheEnabled(true);
            webSettings.setSupportZoom(true);
            webSettings.setDefaultTextEncodingName("UTF-8");
            webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
            webSettings.setUseWideViewPort(true);
            webSettings.setBuiltInZoomControls(false);
            webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);
            webSettings.setLoadWithOverviewMode(true);
            mWebView.loadUrl("目标URL");
        }
    
    
        public WebChromeClient webChromeClient = new WebChromeClient() {
    
            @Override
            public void onPermissionRequest(PermissionRequest request) {
                PermissionUtils.permission(PermissionConstants.CAMERA, PermissionConstants.MICROPHONE, PermissionConstants.STORAGE).rationale(new PermissionUtils.OnRationaleListener() {
                    @Override
                    public void rationale(UtilsTransActivity activity, ShouldRequest shouldRequest) {
                        shouldRequest.again(true);
                    }
                }).callback(new PermissionUtils.FullCallback() {
                    @Override
                    public void onGranted(List<String> permissionsGranted) {
                        request.grant(request.getResources());
                    }
    
                    @Override
                    public void onDenied(List<String> permissionsDeniedForever, List<String> permissionsDenied) {
                        if (!permissionsDeniedForever.isEmpty()) {
                            PermissionUtils.launchAppDetailsSettings();
                        }
                    }
                }).request();
    
            }
        };
    }

总结：动态设置：setWebChromeClient(@Nullable WebChromeClient client)

当H5获取对应权限的时候，会走 onPermissionRequest(PermissionRequest request)回调，

这个时候客户端Check 下有没有该动态权限，如果没有就动态获取权限，然后再调用：

request.grant(request.getResources());

动态给H5授权，这样H5就可以获取到动态的权限，实现对应的功能了