Android ExpandableListActivity 使用示例

该示例只有主程序的代码，并且这部分代码其实和Android ExpandableListView 使用示例的代码很像。

主程序的代码：

package com.toby.personal.testlistview;

import android.app.ExpandableListActivity;
import android.database.DataSetObserver;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.ExpandableListAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
//import android.support.v7.app.AppCompatActivity;

public class MainActivity extends ExpandableListActivity {

    final private static String TAG = "Toby_Test";

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

        ExpandableListAdapter adapter = new ExpandableListAdapter() {

            private final int[] types = new int[]{
                    R.drawable.img01, R.drawable.dog_001, R.drawable.girl01
            };

            private final String[] typeNames = new String[]{
                    "img", "dog", "girl"
            };

            private final String[][] items = new String[][]{
                    {"img01", "img02", "img03", "img04", "img05", "img06", "img07", "img08"},
                    {"dog01", "dog02", "dog03", "dog04", "dog05"},
                    {"girl01", "girl02", "girl03", "girl04", "girl05"}
            };

            private TextView getTextView() {
                AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 200);
                TextView textView = new TextView(MainActivity.this);
                textView.setLayoutParams(lp);
                textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.START);
                textView.setPadding(36, 0, 0, 0);
                textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
                return textView;
            }


            @Override
            public void registerDataSetObserver(DataSetObserver dataSetObserver) {

            }

            @Override
            public void unregisterDataSetObserver(DataSetObserver dataSetObserver) {

            }

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

            @Override
            public int getChildrenCount(int groupPos) {
                return items[groupPos].length;
            }

            @Override
            public Object getGroup(int groupPos) {
                return typeNames[groupPos];
            }

            @Override
            public Object getChild(int groupPos, int childPos) {
                return items[groupPos][childPos];
            }

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

            @Override
            public long getChildId(int groupPos, int childPos) {
                return childPos;
            }

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

            @Override
            public View getGroupView(int groupPos, boolean isExpanded, View convertView,
                                     ViewGroup parent) {
                LinearLayout ll = new LinearLayout(MainActivity.this);
                ll.setOrientation(LinearLayout.HORIZONTAL);
                ImageView type = new ImageView(MainActivity.this);
                type.setScaleType(ImageView.ScaleType.FIT_XY);
                LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(300, 300);
                layoutParams.setMargins(120,10,10,10);
                type.setLayoutParams(layoutParams);
                type.setImageResource(types[groupPos]);
                ll.addView(type);
                TextView textView = getTextView();
                textView.setText(getGroup(groupPos).toString());
                ll.addView(textView);
                return ll;
            }

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

            @Override
            public boolean isChildSelectable(int groupPos, int childPos) {
                return true;
            }

            @Override
            public boolean areAllItemsEnabled() {
                return false;
            }

            @Override
            public boolean isEmpty() {
                return false;
            }

            @Override
            public void onGroupExpanded(int i) {

            }

            @Override
            public void onGroupCollapsed(int i) {

            }

            @Override
            public long getCombinedChildId(long l, long l1) {
                return 0;
            }

            @Override
            public long getCombinedGroupId(long l) {
                return 0;
            }
        };

        setListAdapter(adapter);
    }

}

该测试程序的运行效果：

运行效果

参考文献：《疯狂Android讲义（第2版）》