webView文件上传取消弹窗后再次点击不响应点击事件问题
这是别人写的一篇文章，我是转载来的。
移动端H5页面调用手机相册或者照相机后，再次点击没反应问题，这是需要安卓方面修改的，前端不需要修改。
实现方法是
webView_customer.setWebChromeClient(new WebChromeClient() {
// For Android 3.0+
public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
mUploadMessage = uploadMsg;
ArrayList list = new ArrayList();
list.add("拍照");
list.add("从相册选择");
showTakePicOrPhotoesDialog(Activity_Customer_Edu.this, "选择", list, new DialogUtils.OnClickPicDialogItemListener() {
@Override
public void onClickItem(int which) {
if(0==which){
Intent takeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//下面这句指定调用相机拍照后的照片存储的路径
try {
File file = createImageFile();
takePicUri = Uri.fromFile(file);
takeIntent.putExtra(MediaStore.EXTRA_OUTPUT, takePicUri);
startActivityForResult(takeIntent, FILECHOOSER_RESULTCODE);
} catch (IOException e) {
e.printStackTrace();
}
}else if(1==which){
Intent pickIntent = new Intent(Intent.ACTION_PICK, null); pickIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
startActivityForResult(pickIntent, FILECHOOSER_RESULTCODE);
}
}
});
}
// For Android < 3.0
public void openFileChooser(ValueCallback uploadMsg) {
openFileChooser(uploadMsg, "");
}
// For Android > 4.1.1
public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture) {
openFileChooser(uploadMsg, acceptType);
}
// For Android 5.0+
public boolean onShowFileChooser (WebView webView, ValueCallback filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
mUploadCallbackAboveL = filePathCallback;
ArrayList list = new ArrayList();
list.add("拍照");
list.add("从相册选择");
showTakePicOrPhotoesDialog(Activity_Customer_Edu.this, "选择", list, new DialogUtils.OnClickPicDialogItemListener() {
@Override
public void onClickItem(int which) {
if(0==which){
Intent takeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//下面这句指定调用相机拍照后的照片存储的路径
try {
File file = createImageFile();
takePicUri = Uri.fromFile(file);
takeIntent.putExtra(MediaStore.EXTRA_OUTPUT, takePicUri);
startActivityForResult(takeIntent, FILECHOOSER_RESULTCODE);
} catch (IOException e) {
e.printStackTrace();
}
}else if(1==which){
Intent pickIntent = new Intent(Intent.ACTION_PICK, null);
pickIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
startActivityForResult(pickIntent, FILECHOOSER_RESULTCODE);
}
}
});
return true;
}
});
OnActivityResult回调方法：这里有个特别注意的地方，当打开拍照按钮时，Intent data这个数据是空，所以不能正常上传，打开拍照的Intent当时传了一个Uri，在OnActivityResult需要判断data是不是空，是空的话，就把传的那个Uri赋值给mUploadMessage.onReceiveValue，如果不为空就传data.getData();具体如下：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(requestCode==FILECHOOSER_RESULTCODE){
Uri result;
if (null == mUploadMessage && null == mUploadCallbackAboveL){
return;
}
//如果拍完照点击取消按钮就：if(resultCode ==RESULT_CANCELED){ result = Uri.EMPTY;}else{if(data ==null&& resultCode !=RESULT_OK){ result = Uri.EMPTY; }else if(data ==null){ result =takePicUri; }else{ result = data.getData(); }}
if (mUploadMessage != null) {
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
if(mUploadCallbackAboveL!=null) {mUploadCallbackAboveL.onReceiveValue(newUri[]{result});mUploadCallbackAboveL=null;}
}
}
这里有一个问题，点击“取消”或返回按钮，无法重复回调onShowFileChooser或openFileChooser方法。解决办法：
定义一个方法：
/**
*防止点击dialog的取消按钮之后，就不再次响应点击事件了
*/
public static void cancelCallback(){
if(mUploadCallbackAboveL!=null){
mUploadCallbackAboveL.onReceiveValue(null);
}
if(mUploadMessage!=null){
mUploadMessage.onReceiveValue(null);
}
}
在弹窗（dialog）的取消按钮监听的方法中调用上面的cancellCallBack方法。比如我的：
/**
*展示拍照或者从相册选择的Dialog
* @param context
* @param title
* @param names
* @param onClickPicDialogItemListener
*/
public static void showTakePicOrPhotoesDialog(Context context, String title, final ArrayList names, final DialogUtils.OnClickPicDialogItemListener onClickPicDialogItemListener){
AlertDialog.Builder builder=new AlertDialog.Builder(context);
builder.setTitle(title);//设置标题
String[] itemList=(String[]) names.toArray(new String[names.size()]);
builder.setItems(itemList, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
onClickPicDialogItemListener.onClickItem(which);
}
});
AlertDialog dialog=builder.create();//获取dialog
dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
cancelCallback();
}
});
dialog.show();//显示对话框
}