将图像和文本添加到android gridview

时间：2019-07-16 16:59:57

标签： java mysql android-fragments gridview

运行我的应用程序时出现异常。 我已经尝试过使用类似片段给出的类似问题的答案，但没有成功

这是我的Gridview适配器代码

      public class FoodGridviewAdapter extends BaseAdapter {
Context f;
ArrayList<Food> foods;

public FoodGridviewAdapter(Context f, ArrayList<Food> foods){
    this.f = f;
    this.foods = foods;
}
@Override
public int getCount() {
    return foods.size();
}
@Override
public Object getItem(int position) {
    return foods.get(position);
}
@Override
public long getItemId(int position) {
    return position;
}
@Override
public View getView(int position, View view, ViewGroup viewGroup) {
    if(view==null){
        view = LayoutInflater.from(f).inflate(R.layout.food_layout,viewGroup,false);
    }
    TextView name = view.findViewById(R.id.name);
    TextView cost = view.findViewById(R.id.cost);
    ImageView image = view.findViewById(R.id.image);
    final Food food = (Food) this.getItem(position);
    name.setText(food.getTitle());
    cost.setText(food.getCost());
    //check if there is an image returned
    if(food.getImage()!= null && food.getImage().length()>0){
        Picasso.get().load(food.getImage()).placeholder(R.drawable.foodfuzzlogo).into(image);
    }else{
        Picasso.get().load(R.drawable.foodfuzzlogo).into(image);

    }
    view.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Toast.makeText(f, food.getTitle(),Toast.LENGTH_SHORT).show();
        }
    });

    return view;
}
}

目的是将项目传递到网格视图适配器，并使用项目对其进行充气

这是我的代码，用于使用php RESTful API从mysql数据库中检索项目

    public class DataRetriever {
private static final String URL_FOOD = "http://192.168.100.250:8082/foodfuzzbackend/auth/login.php";
private final Context f;
private FoodGridviewAdapter foodGridviewAdapter;

public DataRetriever(Context f) {
    this.f = f;
}
public void retrieveFood(final GridView gridView, final ProgressBar myprogressbar){
    final ArrayList <Food> foods = new ArrayList<>();
    myprogressbar.setIndeterminate(true);
    myprogressbar.setVisibility(View.VISIBLE);
    AndroidNetworking.get(URL_FOOD).setPriority(Priority.MEDIUM).build().getAsJSONArray(new JSONArrayRequestListener() {
        @Override
        public void onResponse(JSONArray response) {
            JSONObject jsonObject;
            Food food;
            try{
                for(int i=0; i<response.length();i++){
                    jsonObject = response.getJSONObject(i);
                    int id = jsonObject.getInt("id");
                    String name = jsonObject.getString("name");
                    String cost = jsonObject.getString("cost");
                    String image = jsonObject.getString("image");
                    food = new Food(URL_FOOD+"../images/"+ image, name, cost);
                    foods.add(food);
                }
                foodGridviewAdapter = new FoodGridviewAdapter(f,foods);
                myprogressbar.setVisibility(View.GONE);

            }catch (JSONException e){
                myprogressbar.setVisibility(View.GONE);
                e.printStackTrace();
            }
        }

        @Override
        public void onError(ANError anError) {
            myprogressbar.setVisibility(View.GONE);
            anError.printStackTrace();
        }
    });
}
}

然后我有这样的片段代码

     public class Food extends Fragment {
private static final String TAG = "Food";
GridView food;
ProgressBar myprogressbar;
public Food() {

}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
   View view = inflater.inflate(R.layout.fragment_food, container, false);
    food = view.findViewById(R.id.FoodContainer);
   myprogressbar = view.findViewById(R.id.foodProgressBar);
    new DataRetriever(getActivity()).retrieveFood(food,myprogressbar);

    return view;
}
   }

最后这是gridview xml适配器的布局

    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:padding="@dimen/margin_xsmall"
        android:src="@drawable/foodfuzzlogo"
        tools:scaleType="fitXY"
        android:contentDescription="@string/food_fuzz_logo" />

    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/food"
        android:layout_below="@+id/image"
        android:maxLines="3"
        android:padding="@dimen/margin_xsmall"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:textAppearance="?android:attr/textAppearanceSmall"/>

    <TextView
        android:id="@+id/cost"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/ksh_000_00"
        android:layout_below="@+id/name"
        android:padding="@dimen/margin_xsmall"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:typeface="serif"/>

</RelativeLayout>

我该怎么办？我该如何纠正？或者谁有任何链接可以帮助我从mysql db中获取图像和文本，并使用php和java将它们传递给gridview？

这是我得到的错误

    android.view.InflateException: Binary XML file line #18: addView(View, LayoutParams) is not supported in AdapterView
Caused by: java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView
    at android.widget.AdapterView.addView(AdapterView.java:495)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:862)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:861)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
    at com.otemainc.foodfuzzapp.fragment.Food.onCreateView(Food.java:33)
    at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2439)
    at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1460)
    at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
    at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
    at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:802)
    at androidx.fragment.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
    at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
    at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
    at androidx.fragment.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2243)
    at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:654)
    at androidx.fragment.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:168)
    at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1244)
    at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1092)
    at androidx.viewpager.widget.ViewPager.onMeasure(ViewPager.java:1622)
    at android.view.View.measure(View.java:20009)
    at androidx.constraintlayout.widget.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1227)
    at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1572)
    at android.view.View.measure(View.java:20009)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083)
    at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:733)
    at com.google.android.material.appbar.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:95)
    at com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1556)
    at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:803)
    at android.view.View.measure(View.java:20009)
    at androidx.drawerlayout.widget.DrawerLayout.onMeasure(DrawerLayout.java:1119)
    at android.view.View.measure(View.java:20009)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083)
    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
    at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
    at android.view.View.measure(View.java:20009)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083)
    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)
    at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)
    at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)
    at android.view.View.measure(View.java:20009)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083)
    at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
    at android.view.View.measure(View.java:20009)
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6083)
    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)
    at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)

2 个答案:

答案 0 :(得分：1)

除了@Zima所说的那样，我还注意到gridview adpater从未添加到适配器中，因此我将此行添加到了dataretriever类中

     gridView.setAdapter(foodGridviewAdapter);

答案 1 :(得分：0)

基于original Post：

  

对于其他有此问题并夸大了布局的人   ArrayAdapter的{​​{1}}，将getView参数设置为parent，如下   在null

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