Android webview授权 js访问SD卡和相机

前言 ：

最近有个需求， 有个安卓的同事需要处理webview 加载h5 页面然后在webview加载的页面中 通过js 来访问我们安卓设备的sd卡和相机 之前那篇文章有问题 https://www.jianshu.com/p/bc6f1fe9473a

效果图：

具体实现

• 布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
        <WebView
            android:id="@+id/webview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:usesCleartextTraffic="true"/>
</RelativeLayout>

初始化webview 并且加载url

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_view);
        webView = findViewById(R.id.webview);
        settings = webView.getSettings();
        settings.setJavaScriptEnabled(true);//支持JavaScript脚本
        webView.setWebChromeClient(new MyWebChromeClient());
        webView.setWebViewClient(new WebViewClient());
        webView.loadUrl(url);
    }

重写实现WebChromeClient 里方法

  public class MyWebChromeClient extends WebChromeClient {
        // For Android < 3.0
        public void openFileChooser(ValueCallback<Uri> valueCallback) {
            uploadMessage = valueCallback;
            openImageChooserActivity();
        }

        // For Android  >= 3.0
        public void openFileChooser(ValueCallback valueCallback, String acceptType) {
            uploadMessage = valueCallback;
            openImageChooserActivity();
        }

        //For Android  >= 4.1
        public void openFileChooser(ValueCallback<Uri> valueCallback, String acceptType,  String capture) {
            uploadMessage = valueCallback;
            openImageChooserActivity();
        }

        // For Android >= 5.0
        @Override
        public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
            uploadMessageAboveL = filePathCallback;
            openImageChooserActivity();
            return true;
        }
    }

调用图库相册

 private void openImageChooserActivity() {
        //调用自己的图库
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("image/*");
        startActivityForResult(Intent.createChooser(i, "Image Chooser"),     FILE_CHOOSER_RESULT_CODE);
    }

处理 onActivityResult 回调

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == FILE_CHOOSER_RESULT_CODE) { //处理返回的图片，并进行上传
            if (null == uploadMessage && null == uploadMessageAboveL) return;
            Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
            if (uploadMessageAboveL != null) {
                onActivityResultAboveL(requestCode, resultCode, data);
            } else if (uploadMessage != null) {
                uploadMessage.onReceiveValue(result);
                uploadMessage = null;
            }
        }
    }



    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    private void onActivityResultAboveL(int requestCode, int resultCode, Intent intent) {
        if (requestCode != FILE_CHOOSER_RESULT_CODE || uploadMessageAboveL == null)
            return;
        Uri[] results = null;
        if (resultCode == Activity.RESULT_OK) {
            if (intent != null) {
                String dataString = intent.getDataString();
                ClipData clipData = intent.getClipData();
                if (clipData != null) {
                    results = new Uri[clipData.getItemCount()];
                    for (int i = 0; i < clipData.getItemCount(); i++) {
                        ClipData.Item item = clipData.getItemAt(i);
                        results[i] = item.getUri();
                    }
                }
                if (dataString != null)
                    results = new Uri[]{Uri.parse(dataString)};
            }
        }
        uploadMessageAboveL.onReceiveValue(results);
        uploadMessageAboveL = null;
    }

项目地址

码云 ：https://gitee.com/qiuyu123/wenbview-open-file