Android WebView中打开相机拍照和选择相册

一般在项目中与js交互，可能会遇到上传文件图片等操作，避免不了一些坑，下面简单说一下，Android 在不同版本中webView调用相机，选择相册的方法是不一样的，3.0以下的调用

 public void openFileChooser(ValueCallback uploadMsg)

3.0以上：

  public void openFileChooser(ValueCallback uploadMsg, String acceptType)

4.4以下：

  public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture)

5.0以上：

  public boolean onShowFileChooser(WebView mWebView, ValueCallback filePathCallback, FileChooserParams fileChooserParams)

这里有个漏洞，4.4.x的由于系统内核发生了改变，没法调用以上方法，现在仍然找不到解决办法，唯一的方法就是4.4直接使用手机浏览器打开，这个是可以的。

那下面具体的贴下代码：

继承自WebChromeClient，重写

//3.0++public void openFileChooser(ValueCallback uploadMsg, String acceptType) {    openFileChooserImpl(uploadMsg);}//3.0--public void openFileChooser(ValueCallback uploadMsg) {    openFileChooserImpl(uploadMsg);}//4.1public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture) {    openFileChooserImpl(uploadMsg);}@Overridepublic boolean onShowFileChooser(WebView mWebView, ValueCallback filePathCallback, FileChooserParams fileChooserParams) {    openFileChooserImplForAndroid5(filePathCallback);    return true;}

外层定义接收返回值：

private ValueCallback mUploadMessage;private ValueCallback mUploadCallbackAboveL;

不同的版本调不同的方法：

private void openFileChooserImplForAndroid5(ValueCallback uploadMsg) {    mUploadCallbackAboveL = uploadMsg;    dispatchTakePictureIntent();}//5.0以下的掉用private void openFileChooserImpl(ValueCallback uploadMsg) {    mUploadMessage = uploadMsg;    dispatchTakePictureIntent();}//拍照private void dispatchTakePictureIntent() {    selectImgDialog();}

我下面就把代码全部贴出来吧：

   private void takePhoto() {        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        if (takePictureIntent.resolveActivity(getActivity().getPackageManager()) != null) {            Uri imageUri = null;            try {                imageUri = Uri.fromFile(createImageFile());            } catch (IOException e) {                e.printStackTrace();            }            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);            startActivityForResult(takePictureIntent, FILECHOOSER_RESULTCODE);        }    }    /**     * 209.     * 本地相册选择图片     * 210.     */    private void chosePic() {        Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT);        String IMAGE_UNSPECIFIED = "image/*";        innerIntent.setType(IMAGE_UNSPECIFIED); // 查看类型        Intent wrapperIntent = Intent.createChooser(innerIntent, null);        startActivityForResult(wrapperIntent, REQ_CHOOSE);    }    String mCurrentPhotoPath = null;    String FileName = "forum";    //创建文件夹包装图片    private File createImageFile() throws IOException {        File storageDir = new File(Util.getAppPath(getActivity()) + FileName);        if (!storageDir.exists()) {            storageDir.mkdirs();        }        storageDir = new File(Util.getAppPath(getActivity()) + FileName + "/", System.currentTimeMillis() + ".jpg");        //保存当前图片路径        mCurrentPhotoPath = storageDir.getAbsolutePath();        return storageDir;    }    //onActivityResult回调    @Override    public void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == FILECHOOSER_RESULTCODE || requestCode == REQ_CHOOSE) {            if (null == mUploadMessage && null == mUploadCallbackAboveL) return;            Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();            if (mUploadCallbackAboveL != null) {                onActivityResultAboveL(requestCode, data);            } else if (mUploadMessage != null) {                mUploadMessage.onReceiveValue(result);                mUploadMessage = null;            }        }    }    //5.0以上版本，由于api不一样，要单独处理//    @TargetApi(Build.VERSION_CODES.LOLLIPOP)    private void onActivityResultAboveL(int requestCode, Intent data) {        if (mUploadCallbackAboveL == null) {            return;        }        Uri result = null;        if (requestCode == FILECHOOSER_RESULTCODE) {            File file = new File(mCurrentPhotoPath);            Uri localUri = Uri.fromFile(file);            Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, localUri);            getActivity().sendBroadcast(localIntent);            result = Uri.fromFile(file);        } else if (requestCode == REQ_CHOOSE) {            result = data.getData();        }        mUploadCallbackAboveL.onReceiveValue(new Uri[]{result});        mUploadCallbackAboveL = null;        return;    }

后补的代码：

private void openFileChooserImplForAndroid5(ValueCallback uploadMsg) {    mUploadCallbackAboveL = uploadMsg;    dispatchTakePictureIntent();}//5.0以下的掉用private void openFileChooserImpl(ValueCallback uploadMsg) {    mUploadMessage = uploadMsg;    dispatchTakePictureIntent();}

基本代码就是以上这些，selectImgDialog()方法是弹窗提示选择，关于这个弹窗布局的用法，之前写的一篇文章说的很清楚了(BottomSheet 的详解及注意事项)，有疑问的欢迎提问。

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