1. 效果預(yù)覽

2. 在布局文件中放置 ListView 控件

<?xml version="1.0" encoding="utf-8"?> <LinearLayout 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=".MainActivity"><ListViewandroid:id="@+id/listView"android:layout_width="match_parent"android:layout_height="wrap_content"/></LinearLayout>

3. 創(chuàng)建 ListView 的 item 布局

<?xml version="1.0" encoding="utf-8"?> <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="wrap_content"><ImageViewandroid:id="@+id/iv_interaction"android:layout_alignParentStart="true"android:padding="10dp"android:layout_width="wrap_content"android:layout_height="wrap_content"tools:ignore="ContentDescription" /><TextViewandroid:id="@+id/tv_interaction"android:layout_toEndOf="@+id/iv_interaction"android:layout_centerVertical="true"android:textSize="20sp"android:layout_width="wrap_content"android:layout_height="wrap_content"tools:ignore="RelativeOverlap" /><ImageViewandroid:id="@+id/messages_into"android:layout_alignParentEnd="true"android:padding="10dp"android:layout_width="wrap_content"android:layout_height="wrap_content"tools:ignore="ContentDescription" /></RelativeLayout>

4. 創(chuàng)建實(shí)體類

public class InteractionBean {private final int iv_interaction;private final String tv_interaction;private final int messages_into;public InteractionBean(int iv_interaction, String tv_interaction, int messages_into){this.iv_interaction = iv_interaction;this.tv_interaction = tv_interaction;this.messages_into = messages_into;}public int getIv_interaction() {return iv_interaction;}public String getTv_interaction() {return tv_interaction;}public int getMessages_into() {return messages_into;}}

5. 創(chuàng)建適配器繼承自 BaseAdapter

public class InteractionAdapter extends BaseAdapter {private final Context context;private final List<InteractionBean> interactions;public InteractionAdapter(Context context, List<InteractionBean> interactions){this.context = context;this.interactions = interactions;}@Overridepublic int getCount() {return interactions.size();}@Overridepublic Object getItem(int i) {return interactions.get(i);}@Overridepublic long getItemId(int i) {return i;}@Overridepublic View getView(int i, View view, ViewGroup viewGroup) {ViewHolder holder;if (view == null){view = LayoutInflater.from(context).inflate(R.layout.interaction_item, viewGroup, false);holder = new ViewHolder();holder.iv_interaction = view.findViewById(R.id.iv_interaction);holder.tv_interaction = view.findViewById(R.id.tv_interaction);holder.messages_into = view.findViewById(R.id.messages_into);view.setTag(holder);}else {holder = (ViewHolder) view.getTag();}holder.iv_interaction.setImageResource(interactions.get(i).getIv_interaction());holder.tv_interaction.setText(interactions.get(i).getTv_interaction());holder.messages_into.setImageResource(interactions.get(i).getMessages_into());return view;}static class ViewHolder{ImageView iv_interaction;TextView tv_interaction;ImageView messages_into;}}

6. 為 item 設(shè)置數(shù)據(jù)，為 ListView 設(shè)置適配器

public class MainActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ListView listView = findViewById(R.id.listView);List<InteractionBean> interactions = new ArrayList<>();InteractionAdapter adapter = new InteractionAdapter(MainActivity.this, interactions);InteractionBean at = new InteractionBean(R.drawable.messages_at, "有人@你", R.drawable.messages_into);InteractionBean comment = new InteractionBean(R.drawable.messages_comment, "評(píng)論提醒", R.drawable.messages_into);InteractionBean like = new InteractionBean(R.drawable.messages_like, "點(diǎn)贊提醒", R.drawable.messages_into);interactions.add(at);interactions.add(comment);interactions.add(like);listView.setAdapter(adapter);} }

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