位置指数始终在getView返回0和程序违反

我实施ListView并输入getView()时，我一直都想与位置0位置指数始终在getView返回0和程序违反

这是我的活动代码：

public class CompaniesActivity extends AppCompatActivity { 

    ListView listViewCompanies; 
    int categoryId; 
    CompanyLoader companyLoader; 
    ListCompanyDtoOuterClass.ListCompanyDto companiesDto; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_companies); 
     listViewCompanies = (ListView)findViewById(R.id.listViewCompanies); 
     categoryId = getIntent().getIntExtra("IdCategory",0); 
     companyLoader = new CompanyLoader(); 
     getCompaniesByCategoryId(); 
    } 

    private <R extends ListCompanyDtoOuterClass.ListCompanyDto> void getCompaniesByCategoryId() { 
     new AsyncTask<Object, Void, R>() { 
      @Override 
      protected R doInBackground(Object... params) { 
       return (R) companyLoader.GetCompaniesByCategoryId(categoryId); 
      } 

      @Override 
      protected void onPostExecute(R companies) { 
       startList(companies); 
      } 
     }.execute(); 
    } 

    private void startList(ListCompanyDtoOuterClass.ListCompanyDto companies){ 
     companiesDto = companies; 
     ArrayList<CompanyDtoOuterClass.CompanyDto> cc = new ArrayList<>(); 
     for(int i=0;i<companies.getCompaniesCount();i++){ 
      cc.add(companies.getCompanies(i)); 
     } 
     final CompanyAdapter adapter = new CompanyAdapter(this,R.layout.company_item_layout,cc); 
     listViewCompanies.setAdapter(adapter); 
    } 

}

而下面的代码是我Adapter

package com.example.cristian_franco.cic.Adapters; 


public class CompanyAdapter extends ArrayAdapter<CompanyDtoOuterClass.CompanyDto>{ 

    private Context context; 
    private ArrayList<CompanyDtoOuterClass.CompanyDto> companies; 

    public CompanyAdapter(Context context, int resource, ArrayList<CompanyDtoOuterClass.CompanyDto> objects) { 
     super(context, resource, objects); 
     this.companies = objects; 
     this.context = context; 
    }  


    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     View vista = convertView; 
     if(vista == null) { 
      LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      vista = inflater.inflate(R.layout.company_item_layout, parent, false); 
     } 
     if(companies.get(position).getURLImage() == null) 
      return vista; 
     ImageView image = (ImageView) vista.findViewById(R.id.IconComapny); 
     TextView name = (TextView) vista.findViewById(R.id.nombreCompanyTextView); 
     name.setText(companies.get(position).getName()); 
     try { 
      new DownloadImageTask((ImageView) vista.findViewById(R.id.Icon)) 
        .execute(companies.get(position).getURLImage()); 
     }catch (Exception e){ 
      Toast.makeText(getContext(), "valio", Toast.LENGTH_SHORT).show(); 
     } 
     return vista; 
    } 

    @Override 
    public Context getContext() { 
     return context; 
    } 

    public void setContext(Context context) { 
     this.context = context; 
    } 
}

这里是我的布局：

<?xml version="1.0" encoding="utf-8"?> 
<ScrollView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    xmlns:android="http://schemas.android.com/apk/res/android"> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    tools:context="com.example.cristian_franco.cic.CompaniesActivity"> 
    <ListView 
     android:id="@+id/listViewCompanies" 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent"> 

    </ListView>

可以采取什么问题吗？

来源

2016-04-27 cristian franco

你不发表您的布局，但我会检查你的'ListView'高度不设置为'wrap_content'，否则'的ListView '可能会多次请求位置0。 –

公司Dto =公司;检查这一行你使用它 – Haroon

我贴布局 –

是在不正确的ListView滚动视图正确的布局是

<?xml version="1.0" encoding="utf-8"?> 
<!--<ScrollView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    xmlns:android="http://schemas.android.com/apk/res/android">--> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    tools:context="com.example.cristian_franco.cic.CompaniesActivity"> 
    <ListView 
     android:id="@+id/listViewCompanies" 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent"> 

    </ListView> 
</RelativeLayout> 
<!--</ScrollView>-->

来源

2016-04-27 18:08:43

位置指数始终在getView返回0和程序违反

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