android WebView使用input選擇圖片無法使用方案

重寫 WebView的 setWebChromeClient方法

private ValueCallback<Uri> mUploadMessage;
private ValueCallback<Uri[]> mUploadCallbackAboveL;
private int FILECHOOSER_RESULTCODE = 200;

// 以下方法在初始化佈局的時候使用就好
wv_write.setWebChromeClient(new WebChromeClient(){
    public void openFileChooser(ValueCallback<Uri> uploadMsg) {
        Log.d(TAG, "openFileChoose(ValueCallback<Uri> uploadMsg)");
        mUploadMessage = uploadMsg;
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("image/*");
        WriteActivity.this.startActivityForResult(Intent.createChooser(i, "File Chooser"),                 
            FILECHOOSER_RESULTCODE);
    }

    public void openFileChooser( ValueCallback uploadMsg, String acceptType ) {
        Log.d(TAG, "openFileChoose( ValueCallback uploadMsg, String acceptType )");
        mUploadMessage = uploadMsg;
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("image/*");
        WriteActivity.this.startActivityForResult(
            Intent.createChooser(i, "File Browser"),FILECHOOSER_RESULTCODE);
    }

    public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
        Log.d(TAG, "openFileChoose(ValueCallback<Uri> uploadMsg, String acceptType, String capture)");
        mUploadMessage = uploadMsg;
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("image/*");
        WriteActivity.this.startActivityForResult( Intent.createChooser( i, "File Browser" ), FILECHOOSER_RESULTCODE );
    }

    public boolean onShowFileChooser (WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
         mUploadCallbackAboveL = filePathCallback;
         Intent i = new Intent(Intent.ACTION_GET_CONTENT);
         i.addCategory(Intent.CATEGORY_OPENABLE);
         i.setType("image/*");
         WriteActivity.this.startActivityForResult(
              Intent.createChooser(i, "File Browser"),
              FILECHOOSER_RESULTCODE);
         return true;
    }
});

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode==FILECHOOSER_RESULTCODE){
        if (null == mUploadMessage && null == mUploadCallbackAboveL) return;
        Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
        if (mUploadCallbackAboveL != null) {
            onActivityResultAboveL(requestCode, resultCode, data);
        }
        else  if (mUploadMessage != null) {
            mUploadMessage.onReceiveValue(result);
            mUploadMessage = null;
        }
     }
}


@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void onActivityResultAboveL(int requestCode, int resultCode, Intent data) {
    if (requestCode != FILECHOOSER_RESULTCODE|| mUploadCallbackAboveL == null) {
            return;
    }
    Uri[] results = null;
    if (resultCode == Activity.RESULT_OK) {
        if (data == null) {

    } else {
        String dataString = data.getDataString();
        ClipData clipData = data.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)};
        }
    }
    mUploadCallbackAboveL.onReceiveValue(results);
    mUploadCallbackAboveL = null;
    return;
}

OK，上面的代碼一加WebView裏面的 <input type="file">就可以使用了。如果你還想讓圖片回顯，參考這個博客：

https://blog.csdn.net/qq_39852560/article/details/105340424