微调将不会从我的数组填充 [英] spinner won't populate from my array

问题描述

我的应用程序重定向我到一个不同的屏幕从我家一个按钮，水龙头。有一次，我到我的城市我的屏幕微调是可见的。但它不包含从我的阵列的任何元素。没有什么力量关闭或任何东西，但它不能正常工作。

  @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_city）;    如果（savedInstanceState == NULL）{
        。getFragmentManager（）调用BeginTransaction（）加（R.id.container，新PlaceholderFragment（））提交（）。
    }
}公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，捆绑savedInstanceState）{    视图V = inflater.inflate（R.layout.fragment_city，集装箱，FALSE）;    的String [] =考{测试1，测试2};
    微调旋转=（微调）v.findViewById（R.id.countries）;
    ArrayAdapter＆LT;串GT;适应=新ArrayAdapter＆LT;串GT;（这一点，android.R.layout.simple_spinner_item，测试）;
    adapt.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
    spin.setAdapter（适应）;
    返回伏;
}
 

解决方案

您需要具备以下。

 公共静态PlaceHolderFragment延伸片段
   {
     @覆盖
     公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，捆绑savedInstanceState）{    视图V = inflater.inflate（R.layout.fragment_city，集装箱，FALSE）;    的String [] =考{测试1，测试2};
    微调旋转=（微调）v.findViewById（R.id.countries）;
    ArrayAdapter＆LT;串GT;适应=新ArrayAdapter＆LT;串GT;（getActivity（），android.R.layout.simple_spinner_item，测试）;
    adapt.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
    spin.setAdapter（适应）;
    返回伏;
    }
   }
 

也可以使用 getActivity（）来获得主办活动的背景。

My app redirects me to a different screen from my home with the tap of a button. Once, i reach my city screen my spinner is visible. But it doesn't contain any elements from my array. Nothing force closes or anything, but it doesn't work.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_city);

    if (savedInstanceState == null) {
        getFragmentManager().beginTransaction().add(R.id.container, new PlaceholderFragment()).commit();
    }       
}

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View v = inflater.inflate(R.layout.fragment_city, container, false);

    String[] test = {"test1", "test2"};
    Spinner spin = (Spinner) v.findViewById(R.id.countries);
    ArrayAdapter<String> adapt = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, test);
    adapt.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spin.setAdapter(adapt);
    return v;
}

解决方案

You need to have the below.

 public static PlaceHolderFragment extends Fragment
   {
     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View v = inflater.inflate(R.layout.fragment_city, container, false);

    String[] test = {"test1", "test2"};
    Spinner spin = (Spinner) v.findViewById(R.id.countries);
    ArrayAdapter<String> adapt = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_item, test);
    adapt.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spin.setAdapter(adapt);
    return v;
    }
   }

Also use getActivity() to get the context of hosting activity.

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