AndroidのUI - ExpandableListView - liguofeng29’s blog

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <ExpandableListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:horizontalSpacing="1pt"
        android:verticalSpacing="1pt"
        android:numColumns="4"
        android:gravity="center" />
</LinearLayout>

MainActivity.java

package com.example.liguofeng.expandablelistview;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // BaseExpandableListAdapter生成
        ExpandableListAdapter adapter = new BaseExpandableListAdapter() {
            int[] logos = new int[]{R.drawable.logo1, R.drawable.logo2, R.drawable.logo3};
            private String[] type = {"logo1", "logo2", "logo3"};
            private String[][] detail = {
                    {"logo1-1", "logo1-2", "logo1-3",},
                    {"logo2-1", "logo2-2", "logo2-3",},
                    {"logo3-1", "logo3-2", "logo3-3",}
            };

            @Override
            public int getGroupCount() {
                return type.length;
            }

            @Override
            public int getChildrenCount(int groupPosition) {
                return detail[groupPosition].length;
            }

            @Override
            public Object getGroup(int groupPosition) {
                return type[groupPosition];
            }

            @Override
            public Object getChild(int groupPosition, int childPosition) {
                return detail[groupPosition][childPosition];
            }

            @Override
            public long getGroupId(int groupPosition) {
                return groupPosition;
            }

            @Override
            public long getChildId(int groupPosition, int childPosition) {
                return childPosition;
            }

            @Override
            public boolean hasStableIds() {
                return true;
            }

            @Override
            public View getChildView(int groupPosition, int childPosition, 
                                     boolean isLastChild, View convertView, ViewGroup parent) {
                TextView textView = getTextView();
                textView.setText(getChild(groupPosition, childPosition).toString());
                return textView;
            }

            @Override
            public boolean isChildSelectable(int groupPosition, int childPosition) {
                return true;
            }

            @Override
            public View getGroupView(int groupPosition, 
                                     boolean isExpanded, View convertView, ViewGroup parent) {
                LinearLayout layout = new LinearLayout(MainActivity.this);
                layout.setOrientation(LinearLayout.HORIZONTAL);

                ImageView logo = new ImageView(MainActivity.this);
                logo.setImageResource(logos[groupPosition]);

                layout.addView(logo);

                TextView textView = getTextView();
                textView.setText(getGroup(groupPosition).toString());
                layout.addView(textView);

                return layout;
            }

            private TextView getTextView() {
                AbsListView.LayoutParams p = 
                        new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 64);

                TextView textView = new TextView(MainActivity.this);

                textView.setLayoutParams(p);
                textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
                textView.setPadding(36, 0, 0, 0);
                textView.setTextSize(15);
                textView.setTextColor(Color.RED);

                return textView;
            }
        };

        ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.listView);
        // Adapter設定
        expandableListView.setAdapter(adapter);

    }
}