来自列表元素的Android Fragment事务

Question

我有一个ArrayAdapter MealAdapter和列表的元素meal_item，有一些textview和FrameLayout。我想通过点击imageview将片段MealDetails放入此FrameLayout中。 MealAdapter未在“活动”中使用，但在另一个片段中使用。

我的项目是：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#fff">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <!--icon-->
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="2">
            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">
                <ImageView
                    android:id="@+id/meal_number_icon"
                    android:layout_width="70dp"
                    android:layout_height="70dp"
                    android:padding="6dp"
                    android:src="@drawable/ic_menu_gallery"
                    android:layout_centerInParent="true" />
            </RelativeLayout>
        </LinearLayout>
        <!--name-->
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="4"
            android:orientation="horizontal"
            android:paddingBottom="10dp"
            android:paddingTop="10dp">
            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="4"
                android:orientation="vertical">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/protein_source_name"
                    android:text="sdfsdfsdf"
                    android:textSize="15sp"
                    android:textStyle="bold"/>
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/fat_source_name"
                    android:textSize="15sp"
                    android:textStyle="bold"
                    android:text="sdfsdfsdf"/>
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/carb_source_name"
                    android:textSize="15sp"
                    android:textStyle="bold"
                    android:text="sdfsdfsdf"/>
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/vegetable_source_name"
                    android:textSize="15sp"
                    android:textStyle="bold"
                    android:text="sdfsdfsdf"/>
            </LinearLayout>
            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/protein_source_weight"
                    android:text="sdfsdfsdf"
                    android:textSize="15sp"
                    android:textStyle="bold"/>
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/fat_source_weight"
                    android:textSize="15sp"
                    android:textStyle="bold"
                    android:text="sdfsdfsdf"/>
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/carb_source_weight"
                    android:textSize="15sp"
                    android:textStyle="bold"
                    android:text="sdfsdfsdf"/>
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/vegetable_source_weight"
                    android:textSize="15sp"
                    android:textStyle="bold"
                    android:text="sdfsdfsdf"/>
            </LinearLayout>
            </LinearLayout>
        <!-- refreshMeal -->
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="2">
            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">
                <ImageView
                    android:id="@+id/meal_accept_icon"
                    android:layout_width="70dp"
                    android:layout_height="70dp"
                    android:padding="6dp"
                    android:src="@drawable/ic_menu_gallery"
                    android:layout_centerInParent="true" />
            </RelativeLayout>
        </LinearLayout>
        <!--info-->
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1">
            <RelativeLayout
                android:id="@+id/info_layout"
                android:layout_width="match_parent"
                android:layout_height="match_parent">
                <ImageView
                    android:id="@+id/meal_details_icon"
                    android:layout_width="40dp"
                    android:layout_height="40dp"
                    android:src="@drawable/ic_menu_gallery"
                    android:layout_centerInParent="true"
                    android:tint="#8a000000"/>
            </RelativeLayout>
        </LinearLayout>
    </LinearLayout>
    <FrameLayout
        android:id="@+id/meal_frameLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="4dp"
        android:layout_marginRight="4dp">
    </FrameLayout>
</LinearLayout>

和适配器：

public class MealAdapter extends ArrayAdapter {

    List list = new ArrayList();
    private Context context;

    public MealAdapter(Context context, int resource) {
        super(context, resource);
        this.context = context;
    }

    public static class DataHandler{
        ImageView numberIcon;
        ImageView detailsIcon;
        ImageView acceptIcon;

        TextView proteinSourceName;
        TextView fatSourceName;
        TextView carbSourceName;
        TextView vegetableSourceName;

        TextView proteinSourceWeight;
        TextView fatSourceWeight;
        TextView carbSourceWeight;
        TextView vegetableSourceWeight;

        FrameLayout detailsLayout;
    }

    @Override
    public void add(Object object) {
        super.add(object);
        list.add(object);
    }

    @Override
    public int getCount() {
        return this.list.size();
    }

    @Override
    public Object getItem(int position) {
        return this.list.get(position);
    }



    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {

        View view = convertView;
        final DataHandler dataHandler;

        if(convertView==null){
            LayoutInflater inflater = (LayoutInflater)this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = inflater.inflate(R.layout.meal_item,parent,false);
            dataHandler = new DataHandler();

            dataHandler.numberIcon = (ImageView) view.findViewById(R.id.meal_number_icon);
            dataHandler.detailsIcon = (ImageView) view.findViewById(R.id.meal_details_icon);
            dataHandler.acceptIcon = (ImageView) view.findViewById(R.id.meal_accept_icon);

            dataHandler.proteinSourceName =(TextView) view.findViewById(R.id.protein_source_name);
            dataHandler.fatSourceName =(TextView) view.findViewById(R.id.fat_source_name);
            dataHandler.carbSourceName =(TextView) view.findViewById(R.id.carb_source_name);
            dataHandler.vegetableSourceName =(TextView) view.findViewById(R.id.vegetable_source_name);

            dataHandler.proteinSourceWeight =(TextView) view.findViewById(R.id.protein_source_weight);
            dataHandler.fatSourceWeight =(TextView) view.findViewById(R.id.fat_source_weight);
            dataHandler.carbSourceWeight =(TextView) view.findViewById(R.id.carb_source_weight);
            dataHandler.vegetableSourceWeight =(TextView) view.findViewById(R.id.vegetable_source_weight);

            dataHandler.detailsLayout=(FrameLayout)view.findViewById(R.id.meal_frameLayout);
            view.setTag(dataHandler);

        }
        else{
            dataHandler=(DataHandler) view.getTag();
        }
        LayoutInflater inflater = (LayoutInflater)this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        final MealDataProvider mealDataProvider;
        mealDataProvider = (MealDataProvider) this.getItem(position);

        dataHandler.numberIcon.setImageResource(mealDataProvider.getNumberIcon());
        dataHandler.detailsIcon.setImageResource(mealDataProvider.getShowIcon());
        dataHandler.acceptIcon.setImageResource(mealDataProvider.getAcceptIcon());

        dataHandler.proteinSourceName.setText(mealDataProvider.getProteinSourceName());
        dataHandler.fatSourceName.setText(mealDataProvider.getFatSourceName());
        dataHandler.carbSourceName.setText(mealDataProvider.getCarbSourceName());
        dataHandler.vegetableSourceName.setText(mealDataProvider.getVegetableSourceName());

        dataHandler.proteinSourceWeight.setText(mealDataProvider.getProteinSourceWeight());
        dataHandler.fatSourceWeight.setText(mealDataProvider.getFatSourceWeight());
        dataHandler.carbSourceWeight.setText(mealDataProvider.getCarbSourceWeight());
        dataHandler.vegetableSourceWeight.setText(mealDataProvider.getVegetableSourceWeight());


        dataHandler.detailsIcon.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getContext(),"click",Toast.LENGTH_LONG).show();
                MealDetails mealDetails = new MealDetails();
                FragmentTransaction ft = ((FragmentActivity)context).getSupportFragmentManager().beginTransaction();
                ft.replace(dataHandler.detailsLayout.getId(),mealDetails);
            }
        });

        return view;
    }

}

onClick方法有效（有＆＃34;点击＆＃34;吐司）但没有其他事情发生，如果我click dataHandler.detailsIcon，则AndroidMonitor中没有任何内容。

如何将片段放入列表元素中的framelayout？

修改 我忘记了commit()，所以现在它可以工作但仅适用于第一个列表元素中的FrameLayout。单击哪个列表元素并不重要，片段MealDetails始终位于同一个FrameLayout中。 可能是因为每个FrameLayout都有相同的id（？）有什么方法可以解决它吗？

Answer 1

您忘记了commit()您的FragmentTransaction。

如果您不提交，则不会发生任何事情。 Android Studio也应该对此发出警告。