Question

Android Studio ListView项目收藏ImageButton功能

大家好，

请帮帮我。

我有心脏ImageButton的listview项目。（@绘制/心脏）

我想点击点击后将（@ drawable / heartred）更改为（@ drawable / heartred）。

这意味着它被标记为收藏。

我还想在我喜欢的标签中显示带有红心的项目。

下面是图片和代码。

fragment_fragment_one.xml

<FrameLayout 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"
    tools:context="com.magicstarme.virtualsongbook.FragmentOne">

    <!-- TODO: Update blank fragment layout -->
    <!--<TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="@string/hello_blank_fragment_one" />-->

    <TabHost
        android:id="@+id/tabHost"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TabWidget
                android:id="@android:id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"></TabWidget>

            <FrameLayout
                android:id="@android:id/tabcontent"
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <LinearLayout
                    android:id="@+id/tab1"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="#ffffff"
                    android:orientation="vertical">

                    <ListView
                        android:id="@+id/slListView"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:listSelector="@android:color/transparent"
                        android:cacheColorHint="@android:color/transparent"/>

                </LinearLayout>

                <LinearLayout
                    android:id="@+id/tab2"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="#ffffff"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:text="This is tab 2" />
                </LinearLayout>

                <LinearLayout
                    android:id="@+id/tab3"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="#ffffff"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:text="This is tab 3" />
                </LinearLayout>
            </FrameLayout>
        </LinearLayout>
    </TabHost>

</FrameLayout>

fragment_fragment_one_slview.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:paddingRight="5dip"
        android:orientation="vertical"
        android:layout_weight="3
        ">
        <FrameLayout
            android:id="@+id/framelayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="17dp"
                android:textStyle="bold" />

        </FrameLayout>

        <FrameLayout
            android:id="@+id/framelayout2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/artist"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="15dp"
                android:layout_gravity="left|top"/>

            <TextView
                android:id="@+id/volume"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="15dp"
                android:layout_gravity="right|top"/>

        </FrameLayout>

    </LinearLayout>

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_weight="1"
        android:layout_toStartOf="@+id/relativeLayout3">

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentTop="true"
            android:layout_alignParentStart="true"
            android:padding="5dp">

            <ImageButton
                android:id="@+id/mic"
                android:layout_width="32dp"
                android:layout_height="32dp"
                android:src="@drawable/mic"
                android:layout_gravity="left|top"
                android:background="#ffffff" />


        </FrameLayout>

    </LinearLayout>

    <LinearLayout
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="match_parent"
        android:background="#cccccc"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true">

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:padding="5dp"
            android:background="#cccccc">

            <TextView
                android:id="@+id/number"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="17dp"
                android:textStyle="bold"
                android:layout_alignParentTop="true"
                android:layout_centerHorizontal="true"
                android:layout_gravity="center_horizontal|top" />

        </FrameLayout>

    </LinearLayout>
</LinearLayout>

FragmentOne.class

package com.magicstarme.virtualsongbook;

import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TabHost;
import android.widget.ToggleButton;

import java.util.ArrayList;


/**
 * A simple {@link Fragment} subclass.
 * Activities that contain this fragment must implement the
 * {@link FragmentOne.OnFragmentInteractionListener} interface
 * to handle interaction events.
 * Use the {@link FragmentOne#newInstance} factory method to
 * create an instance of this fragment.
 */
public class FragmentOne extends Fragment {
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    private OnFragmentInteractionListener mListener;

    public FragmentOne() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment FragmentOne.
     */
    // TODO: Rename and change types and number of parameters
    public static FragmentOne newInstance(String param1, String param2) {
        FragmentOne fragment = new FragmentOne();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    public static boolean heart_selected = false;

    public static int position = -1;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View rootView = inflater.inflate(R.layout.fragment_fragment_one, container, false);

        TabHost host = (TabHost) rootView.findViewById(R.id.tabHost);
        host.setup();

        //Tab 1
        TabHost.TabSpec spec = host.newTabSpec("SONG LIST");
        spec.setContent(R.id.tab1);
        spec.setIndicator("SONG LIST");
        host.addTab(spec);

            ArrayList<FragmentOne_slResults> slResults = GetSearchResults();
        final ListView sllv = (ListView) rootView.findViewById(R.id.slListView);
        sllv.setAdapter(new FragmentOne_Adapter(getActivity(), slResults));

        //Tab 2
        spec = host.newTabSpec("NEW SONGS");
        spec.setContent(R.id.tab2);
        spec.setIndicator("NEW SONGS");
        host.addTab(spec);

        //Tab 3
        spec = host.newTabSpec("FAVORITES");
        spec.setContent(R.id.tab3);
        spec.setIndicator("FAVORITES");
        host.addTab(spec);

        return rootView;
    }

    //SONG LIST
    private ArrayList<FragmentOne_slResults> GetSearchResults(){
        ArrayList<FragmentOne_slResults> results = new ArrayList<FragmentOne_slResults>();

        FragmentOne_slResults slr = new FragmentOne_slResults();
        slr.setId("1");
        slr.setTitle("Song Title 1 Song Title 1 Title 2");
        slr.setArtist("Artist 1");
        slr.setVolume("Vol 1");
        slr.setNumber("1");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("2");
        slr.setTitle("Song Title 2 Song Title 2 Title 2");
        slr.setArtist("Artist 2");
        slr.setVolume("Vol 2");
        slr.setNumber("2");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("3");
        slr.setTitle("Song Title 3");
        slr.setArtist("Artist 3");
        slr.setVolume("Vol 3");
        slr.setNumber("3");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("4");
        slr.setTitle("Song Title 2");
        slr.setArtist("Artist 2");
        slr.setVolume("Vol 2");
        slr.setNumber("4");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("5");
        slr.setTitle("Song Title 2 Song Title 2 Title 2");
        slr.setArtist("Artist 3");
        slr.setVolume("Vol 3");
        slr.setNumber("5");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("6");
        slr.setTitle("Song Title 2");
        slr.setArtist("Artist 2");
        slr.setVolume("Vol 2");
        slr.setNumber("6");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("7");
        slr.setTitle("Song Title 2 Song Title 2 Title 2 Song Title 2 Song Title 2 Title 23 tle 2 Song Title 2 Song Title 2 Title 2");
        slr.setArtist("Artist 3");
        slr.setVolume("Vol 3");
        slr.setNumber("7");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("8");
        slr.setTitle("Song Title 2");
        slr.setArtist("Artist 2");
        slr.setVolume("Vol 2");
        slr.setNumber("8");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("9");
        slr.setTitle("Song Title 3");
        slr.setArtist("Artist 3");
        slr.setVolume("Vol 3");
        slr.setNumber("9");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("10");
        slr.setTitle("Song Title 2");
        slr.setArtist("Artist 2");
        slr.setVolume("Vol 2");
        slr.setNumber("10");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("11");
        slr.setTitle("Song Title 3");
        slr.setArtist("Artist 3");
        slr.setVolume("Vol 3");
        slr.setNumber("11");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("12");
        slr.setTitle("Song Title 2");
        slr.setArtist("Artist 2");
        slr.setVolume("Vol 2");
        slr.setNumber("12");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("13");
        slr.setTitle("Song Title 3");
        slr.setArtist("Artist 3");
        slr.setVolume("Vol 3");
        slr.setNumber("13");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("14");
        slr.setTitle("Song Title 2");
        slr.setArtist("Artist 2");
        slr.setVolume("Vol 2");
        slr.setNumber("14");
        results.add(slr);

        slr = new FragmentOne_slResults();
        slr.setId("15");
        slr.setTitle("Song Title 3");
        slr.setArtist("Artist 3");
        slr.setVolume("Vol 3");
        slr.setNumber("15");
        results.add(slr);


        return results;
    }

    // TODO: Rename method, update argument and hook method into UI event
    public void onButtonPressed(Uri uri) {
        if (mListener != null) {
            mListener.onFragmentInteraction(uri);
        }
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p/>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        void onFragmentInteraction(Uri uri);
    }
}

FragmentOne_Adapter.class

 package com.magicstarme.virtualsongbook;

import android.content.Context;
import android.media.Image;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ToggleButton;

import java.util.ArrayList;

/**
 * Created by Joe on 6/29/2016.
 */
public class FragmentOne_Adapter extends BaseAdapter {
    private static ArrayList<FragmentOne_slResults> oneslArrayList;

    private LayoutInflater mInflater;
    private boolean[] isFavorite;

    public FragmentOne_Adapter(Context context, ArrayList<FragmentOne_slResults> slresults) {
        oneslArrayList = slresults;
        mInflater = LayoutInflater.from(context);
    }

    public int getCount() {
        return oneslArrayList.size();
    }

    public Object getItem(int position) {
        return oneslArrayList.get(position);
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(final int position, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.fragment_fragment_one_slview, null);
            holder = new ViewHolder();

            holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
            holder.txtArtist = (TextView) convertView.findViewById(R.id.artist);
            holder.txtVolume = (TextView) convertView.findViewById(R.id.volume);
            holder.txtNumber = (TextView) convertView.findViewById(R.id.number);

            holder.buttonHeart = (ImageButton) convertView.findViewById(R.id.heart);

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.txtTitle.setText(oneslArrayList.get(position).getTitle());
        holder.txtArtist.setText(oneslArrayList.get(position).getArtist());
        holder.txtVolume.setText(oneslArrayList.get(position).getVolume());
        holder.txtNumber.setText(oneslArrayList.get(position).getNumber());

        if (oneslArrayList.get(position).isFavorite) {
            holder.buttonHeart.setImageResource(R.drawable.heartred);
        }
        holder.buttonHeart.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                // Toggle the favorites status of the imageButton and the data.
                boolean isFavorite = !oneslArrayList.get(position).isFavorite;
                oneslArrayList.get(position).setIsFavorite(isFavorite);
                holder.buttonHeart.setImageResource(isFavorite ? R.drawable.heartred : R.drawable.heart);
            }
        });

        return convertView;
    }

    static class ViewHolder {
        TextView txtTitle;
        TextView txtArtist;
        TextView txtVolume;
        TextView txtNumber;
        ImageButton buttonHeart;
        ToggleButton btnFavorite;
        ImageView btnHeart;
    }
}

FragmentOne_Result.class

包com.magicstarme.virtualsongbook;

/**
 * Created by Joe on 6/29/2016.
 */
public class FragmentOne_slResults{
    private String id = "";
    private String title = "";
    private String artist = "";
    private String volume = "";
    private String number = "";
    boolean isFavorite;

    public void setId(String id) {
        this.id = id;
    }
    public String getId() {
        return id;
    }

    public void setTitle(String title) {
        this.title = title;
    }
    public String getTitle() {return title;}

    public void setArtist(String artist) {
        this.artist = artist;
    }
    public String getArtist() {
        return artist;
    }

    public void setVolume(String volume) {
        this.volume = volume;
    }
    public String getVolume() {
        return volume;
    }

    public void setNumber(String number) {this.number = number;}
    public String getNumber() {return number;}

    public void setIsFavorite(boolean isFavorite) {this.isFavorite = isFavorite;}
    //public String getFavorite() {return favorite;}
}

Answer 1

Instead of imagebutton use Toggle for favourite

<ToggleButton
    android:id="@+id/tgbFav"
    android:layout_width="30dp"
    android:layout_height="30dp"
    android:focusable="false"
    android:focusableInTouchMode="false"
    android:background="@drawable/fav_checked"
    android:textOff=""
    android:textOn=""/>

fav_checked.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/heart"
    android:state_checked="true" />
<item android:drawable="@drawable/heartred"
    android:state_checked="false"
    />

单击切换时显示的收藏列表更新数据库或将此项目标记为收藏，这样您就可以列出所有喜欢的项目..希望这有助于您

适配器内的

[ur fav toggle].setChecked(favorites[position]);
    [ur fav toggle].setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Boolean fav;
            if (favorites[position] == true) {
                favorites[position] = false;
            } else {
                favorites[position] = true;
            }
        }
    });
public View getView(final int position, View convertView, ViewGroup parent) {
    final ViewHolder holder;
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.fragment_fragment_one_slview, null);
        holder = new ViewHolder();

        holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
        holder.txtArtist = (TextView) convertView.findViewById(R.id.artist);
        holder.txtVolume = (TextView) convertView.findViewById(R.id.volume);
        holder.txtNumber = (TextView) convertView.findViewById(R.id.number);

        holder.buttonHeart = (ToggleButton) convertView.findViewById(R.id.heart);

        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.txtTitle.setText(oneslArrayList.get(position).getTitle());
    holder.txtArtist.setText(oneslArrayList.get(position).getArtist());
    holder.txtVolume.setText(oneslArrayList.get(position).getVolume());
    holder.txtNumber.setText(oneslArrayList.get(position).getNumber());

        holder.buttonHeart.setChecked(oneslArrayList.get(position).isFavorite);
    holder.buttonHeart.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {
            boolean isFavorite = !oneslArrayList.get(position).isFavorite;
            oneslArrayList.get(position).setIsFavorite(isFavorite);
        }
    });

    return convertView;
}

我更新了适配器的getView 现在创建一个包含insert，fetch和update（for favorite）功能的数据库。然后在FragmentOne_slResults类中初始化boolean isFavorite=false。所以在这个类中，在数据库中添加这些项

//SONG LIST
private ArrayList<FragmentOne_slResults> GetSearchResults(){
    ArrayList<FragmentOne_slResults> results = new ArrayList<FragmentOne_slResults>();

    FragmentOne_slResults slr = new FragmentOne_slResults();
    slr.setId("1");
    slr.setTitle("Song Title 1 Song Title 1 Title 2");
    slr.setArtist("Artist 1");
    slr.setVolume("Vol 1");
    slr.setNumber("1");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("2");
    slr.setTitle("Song Title 2 Song Title 2 Title 2");
    slr.setArtist("Artist 2");
    slr.setVolume("Vol 2");
    slr.setNumber("2");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("3");
    slr.setTitle("Song Title 3");
    slr.setArtist("Artist 3");
    slr.setVolume("Vol 3");
    slr.setNumber("3");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("4");
    slr.setTitle("Song Title 2");
    slr.setArtist("Artist 2");
    slr.setVolume("Vol 2");
    slr.setNumber("4");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("5");
    slr.setTitle("Song Title 2 Song Title 2 Title 2");
    slr.setArtist("Artist 3");
    slr.setVolume("Vol 3");
    slr.setNumber("5");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("6");
    slr.setTitle("Song Title 2");
    slr.setArtist("Artist 2");
    slr.setVolume("Vol 2");
    slr.setNumber("6");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("7");
    slr.setTitle("Song Title 2 Song Title 2 Title 2 Song Title 2 Song Title 2 Title 23 tle 2 Song Title 2 Song Title 2 Title 2");
    slr.setArtist("Artist 3");
    slr.setVolume("Vol 3");
    slr.setNumber("7");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("8");
    slr.setTitle("Song Title 2");
    slr.setArtist("Artist 2");
    slr.setVolume("Vol 2");
    slr.setNumber("8");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("9");
    slr.setTitle("Song Title 3");
    slr.setArtist("Artist 3");
    slr.setVolume("Vol 3");
    slr.setNumber("9");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("10");
    slr.setTitle("Song Title 2");
    slr.setArtist("Artist 2");
    slr.setVolume("Vol 2");
    slr.setNumber("10");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("11");
    slr.setTitle("Song Title 3");
    slr.setArtist("Artist 3");
    slr.setVolume("Vol 3");
    slr.setNumber("11");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("12");
    slr.setTitle("Song Title 2");
    slr.setArtist("Artist 2");
    slr.setVolume("Vol 2");
    slr.setNumber("12");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("13");
    slr.setTitle("Song Title 3");
    slr.setArtist("Artist 3");
    slr.setVolume("Vol 3");
    slr.setNumber("13");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("14");
    slr.setTitle("Song Title 2");
    slr.setArtist("Artist 2");
    slr.setVolume("Vol 2");
    slr.setNumber("14");
    results.add(slr);

    slr = new FragmentOne_slResults();
    slr.setId("15");
    slr.setTitle("Song Title 3");
    slr.setArtist("Artist 3");
    slr.setVolume("Vol 3");
    slr.setNumber("15");
    results.add(slr);

    //add results into the database
    return results;
}

所以现在代替此ArrayList<FragmentOne_slResults> slResults = GetSearchResults();将此替换为最喜欢的onclick上的ArrayList<FragmentOne_slResults> slResultsFromDb=[fetch data from database]; ArrayList<FragmentOne_slResults> slResults=new ArrayList<>(); if(slResultsFromDb.size>0){ slResults.addAll(slResultsFromDb); }else slResults.addAll(GetSearchResults());更新数据库希望这适合您

Answer 2

您需要在FragmentOne_slResults类中添加一个布尔值，以跟踪对象是否被收藏。不要忘记为该布尔值添加一个setter和一个getter（isFavorite（）和setFavorite（boolean））。

此时您必须在getView()方法中检查该布尔值，以便您可以根据是否收藏来更改ImageButton的背景图像。要在点击图片时更改图片，您还应该在适配器的OnClickListener方法中为每个心脏ImageButton添加getView()，这将更新该位置数据的收藏状态并更改背景图像按钮的图像。你的getView（）方法如下所示：

  public View getView(final int position, View convertView, ViewGroup parent) {
    final ViewHolder holder;
    if (convertView == null) {
      convertView = mInflater.inflate(R.layout.fragment_fragment_one_slview, null);
      holder = new ViewHolder();

      holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
      holder.txtArtist = (TextView) convertView.findViewById(R.id.artist);
      holder.txtVolume = (TextView) convertView.findViewById(R.id.volume);
      holder.txtNumber = (TextView) convertView.findViewById(R.id.number);

      holder.buttonHeart = (ImageButton) convertView.findViewById(R.id.heart);
      final ImageButton tmp = holder.buttonHeart;

      holder.btnHeart = (ImageView) convertView.findViewById(R.id.heart);

      convertView.setTag(holder);
    } else {
      holder = (ViewHolder) convertView.getTag();
    }

    holder.txtTitle.setText(oneslArrayList.get(position).getTitle());
    holder.txtArtist.setText(oneslArrayList.get(position).getArtist());
    holder.txtVolume.setText(oneslArrayList.get(position).getVolume());
    holder.txtNumber.setText(oneslArrayList.get(position).getNumber());
    // Set the correct heart status based on the favorite status.
    holder.buttonHeart.setImageResource(oneslArrayList.get(position).isFavorite 
         ? R.drawable.hearted : R.drawable.heart);
    holder.buttonHeart.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View view) {
        // Toggle the favorites status of the imageButton and the data.
        boolean isFavorite = !oneslArrayList.get(position).isFavorite();
        oneslArrayList.get(position).setFavorite(isFavorite);
        holder.buttonHeart.setImageResource(isFavorite ? R.drawable.hearted : R.drawable.heart);
      }
    }

    return convertView;
  }

您的班级FragmentOne_slResults应如下所示：

/**
 * Created by Joe on 6/29/2016.
 */
public class FragmentOne_slResults{
    private String id = "";
    private String title = "";
    private String artist = "";
    private String volume = "";
    private String number = "";
    // this is now private
    private boolean isFavorite;

    public void setId(String id) {
        this.id = id;
    }
    public String getId() {
        return id;
    }

    public void setTitle(String title) {
        this.title = title;
    }
    public String getTitle() {return title;}

    public void setArtist(String artist) {
        this.artist = artist;
    }
    public String getArtist() {
        return artist;
    }

    public void setVolume(String volume) {
        this.volume = volume;
    }
    public String getVolume() {
        return volume;
    }

    public void setNumber(String number) {this.number = number;}
    public String getNumber() {return number;}

    public void setIsFavorite(boolean isFavorite) {this.isFavorite = isFavorite;}
    // The return type of this is boolean, not String
    public boolean isFavorite() {return isFavorite;}
}

此外，要清理代码，请查看是否可以删除对oneslArrayList.get(position)的所有调用，只需将项目放在一个变量中并重复使用。

Answer 3

1＆GT;你是在你的bean或模型类中添加喜欢的歌曲状态，如下所示

    FragmentOne_slResults slr = new FragmentOne_slResults();
    slr.setId("1");
    slr.setTitle("Song Title 1 Song Title 1 Title 2");
    slr.setArtist("Artist 1");
    slr.setVolume("Vol 1");
    slr.setNumber("1");
    slr.setIsFavorite(false);//add this variable in your model class
    results.add(slr);

2 - ;当您选择喜欢的项目时，请使用true值更新此值并通知您的适配器 3 GT;添加以下代码检查歌曲的条件是否收藏

    if (oneslArrayList.get(position).isFavorite) {
    holder.buttonHeart.setImageResource(R.drawable.red_heart);
   }else{
   holder.buttonHeart.setImageResource(R.drawable.white__heart);
   }

Answer 4

imho，而不是reinventing the wheel你可以使用这些列表中的Like Button库：

Like Button
LikeAnimation，仅适用于API＆gt; = 21。
SmallBang

Android Studio ListView项目收藏ImageButton功能

4 个答案: