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最近在为公司的几个H5项目做app打包，然后就踩到这个坑了。

项目中有 h5调用相册选择图片，然后上传这个功能，测试说上传不了图片。然后搜了不少资料，折腾了一下午，终于搞好了，特此记录下。

坑1：

原生WebView 的选择文件功能需要我们自己实现，代码如下：

[代码]java代码：

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wv_main.setWebChromeClient(new WebChromeClient() {             // Andorid 4.1----4.4             public void openFileChooser(ValueCallback<uri> uploadFile, String acceptType, String capture) {                   mFilePathCallback = uploadFile;                 handle(uploadFile);             }               // for 5.0+             @Override             public boolean onShowFileChooser(WebView webView, ValueCallback<uri[]> filePathCallback, FileChooserParams fileChooserParams) {                 if (mFilePathCallbackArray != null) {                     mFilePathCallbackArray.onReceiveValue(null);                 }                 mFilePathCallbackArray = filePathCallback;                 handleup(filePathCallback);                 return true;             }             });     }       private void handle(ValueCallback<uri> uploadFile) {         Intent intent = new Intent(Intent.ACTION_PICK);         intent.setType("image/*");         startActivityForResult(intent, PICK_REQUEST);     }       private void handleup(ValueCallback<uri[]> uploadFile) {           Intent intent = new Intent(Intent.ACTION_PICK);         intent.setType("image/*");         startActivityForResult(intent, PICK_REQUEST);     } </uri[]></uri></uri[]></uri>

 

然后在Activity的onActivityResult 方法里处理回调，代码如下：

[代码]java代码：

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@Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);          if (requestCode == PICK_REQUEST) {            if (null != data) {                Uri uri = data.getData();                handleCallback(uri);            } else {                // 取消了照片选取的时候调用                handleCallback(null);            }        } else {            // 取消了照片选取的时候调用            handleCallback(null);        }        }

[代码]java代码：

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/**      * 处理WebView的回调      *      * @param uri      */     private void handleCallback(Uri uri) {         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {             if (mFilePathCallbackArray != null) {                 if (uri != null) {                     mFilePathCallbackArray.onReceiveValue(new Uri[]{uri});                 } else {                     mFilePathCallbackArray.onReceiveValue(null);                 }                 mFilePathCallbackArray = null;             }         } else {             if (mFilePathCallback != null) {                 if (uri != null) {                     String url = getFilePathFromContentUri(uri, getContentResolver());                     Uri u = Uri.fromFile(new File(url));                       mFilePathCallback.onReceiveValue(u);                 } else {                     mFilePathCallback.onReceiveValue(null);                 }                 mFilePathCallback = null;             }         }     }

 

坑2：记得一定要释放，不然点取消之后，就再调不起来了（一下午主要就填这个坑了）

[代码]java代码：

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4.1-4.4  mFilePathCallback.onReceiveValue(null); 5.0 mFilePathCallbackArray.onReceiveValue(null);

坑3：4.4以下，返回的Uri 是content: 开头的，h5端识别不了，需要转成绝对路径

[代码]java代码：

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public static String getFilePathFromContentUri(Uri selectedVideoUri,                                                    ContentResolver contentResolver) {         String filePath;         String[] filePathColumn = {MediaStore.MediaColumns.DATA};           Cursor cursor = contentResolver.query(selectedVideoUri, filePathColumn, null, null, null); //      也可用下面的方法拿到cursor //      Cursor cursor = this.context.managedQuery(selectedVideoUri, filePathColumn, null, null, null);           cursor.moveToFirst();           int columnIndex = cursor.getColumnIndex(filePathColumn[0]);         filePath = cursor.getString(columnIndex);         cursor.close();         return filePath;     }