Android WebView中打开相机拍照和选择相册

来源：互联网发布：淘宝的一元秒杀在哪里编辑：程序博客网时间：2024/05/29 10:01

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<Uri> uploadMsg)

3.0以上：

  public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType)

4.4以下：

  public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture)

5.0以上：

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

外层定义接收返回值：

private ValueCallback<Uri> mUploadMessage;private ValueCallback<Uri[]> mUploadCallbackAboveL;

不同的版本调不同的方法：

private void openFileChooserImplForAndroid5(ValueCallback<Uri[]> uploadMsg) {    mUploadCallbackAboveL = uploadMsg;    dispatchTakePictureIntent();}//5.0以下的掉用private void openFileChooserImpl(ValueCallback<Uri> 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;    }

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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