小编use*_*501的帖子

我尝试在Firebase连接的Android应用中实施Google登录.当我运行应用程序并按Google登录按钮时 - 没有任何反应.我在onActivityResult中收到此错误: Status {statusCode = DEVELOPER_ERROR,resolution = null}.

我的代码看起来像这样:

     protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (requestCode == REQUEST_CODE_GOOGLE_LOGIN) {
        GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);

        if (result.isSuccess()){
            GoogleSignInAccount account = result.getSignInAccount();
            String emailAddres = account.getEmail();
            getGoogleQAuthToken(emailAddres);
        }
    }
}

         private void getGoogleQAuthToken(final String emailAddres){
             AsyncTask<Void,Void,String> task = new AsyncTask<Void, Void, String>() {
                 String errorMessage = null;

                 @Override
                 protected String doInBackground(Void... params) {
                     String token = null;
                     try {
                         String scope = "oauth2:profile email";
                         token = GoogleAuthUtil.getToken(MainActivity.this, …

我尝试开发一个简单的购物应用程序.将有一些产品类别,我对每个类别使用ListView的不同活动.当用户选择产品类别(比如items1 ="drink")时 - 新的屏幕打开,他可以添加"soda","cola"......我想在每个类别上添加计数徽章,以显示每个类别的产品数量.因此,例如对于"项目"我需要显示5,对于"items1" - 2和对于"items10/11" - 显示1:

我的ActivityItems1代码:

       private Firebase mRef;
       private String mUserId;
       private String itemsUrl;
       private TextView badge;


       itemsUrl = Constants.FIREBASE_URL + "/users/" + mUserId + "/items1";



    // Set up LisView
    final ListView listView = (ListView) findViewById(R.id.listView);
    final ArrayAdapter<String> adapter = new ArrayAdapter<>(this,     android.R.layout.simple_list_item_1, android.R.id.text1);
    listView.setAdapter(adapter);  

    // Find badge
         badge =(TextView)findViewById(R.id.badgeView);


    // Use Firebase to populate the list.
    new Firebase(itemsUrl)
            .addChildEventListener(new ChildEventListener() {
                @Override
                public void onChildAdded(DataSnapshot dataSnapshot, String   s) {
                    adapter.add((String)     dataSnapshot.child("title").getValue());


     Log.e(dataSnapshot.getKey(),    dataSnapshot.getChildrenCount() + ""); …