0

我正在尝试从我的可扩展列表的子项中启动一个活动。这个框架取自 Android SDK 中的示例，是我的应用程序的核心。这是代码，我将确定哪些区域不起作用。

package com.soraingraven.suprRef;

import android.app.ExpandableListActivity;
import android.content.Intent;
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.TextView;

public class SuperReferenceActivity extends ExpandableListActivity {
    ExpandableListAdapter mAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Set up our adapter
        mAdapter = new MyExpandableListAdapter();
        setListAdapter(mAdapter);
        //registerForContextMenu(getExpandableListView());
        getExpandableListView().setOnChildClickListener(this);
    }

    @Override
    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
        super.onListItemClick(parent, v, groupPosition, childPosition, id);
        String testName[][] = children[groupPosition][childPosition];
        try {
            Class clazz = Class.forName("com.soraingraven.suprRef." + testName);
            Intent intent = new Intent(this, clazz);
            startActivity(intent);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }       
        // use groupPosition and childPosition to locate the current item in the adapter
        return true;
    }

    /*@Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
        menu.setHeaderTitle("Sample menu");
        menu.add(0, 0, 0, "Sample action");
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item.getMenuInfo();
        String title = ((TextView) info.targetView).getText().toString();

        int type = ExpandableListView.getPackedPositionType(info.packedPosition);
        if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
            int groupPos = ExpandableListView.getPackedPositionGroup(info.packedPosition); 
            int childPos = ExpandableListView.getPackedPositionChild(info.packedPosition); 
            Toast.makeText(this, title + ": Child " + childPos + " clicked in group " + groupPos,
                    Toast.LENGTH_SHORT).show();
            return true;
        } else if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
            int groupPos = ExpandableListView.getPackedPositionGroup(info.packedPosition); 
            Toast.makeText(this, title + ": Group " + groupPos + " clicked", Toast.LENGTH_SHORT).show();
            return true;
        }

        return false;
    }*/ //Context Menu Stuff May or may not use

    //Indexes for all the options
    public class MyExpandableListAdapter extends BaseExpandableListAdapter {
        private String[] groups = {"Math Formulas and Equations"};                                  //Main Menu

        private String[][] children = {                                                             //Sub Menus
                { "PerfectGasLaw" }                                                             //Math Equations Sub Menu         
        };

        public Object getChild(int groupPosition, int childPosition) {
            return children[groupPosition][childPosition];
        }

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

        public int getChildrenCount(int groupPosition) {
            return children[groupPosition].length;
        }

        public TextView getGenericView() {
            AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
                    ViewGroup.LayoutParams.FILL_PARENT, 128);
            TextView textView = new TextView(SuperReferenceActivity.this);
            textView.setLayoutParams(lp);
            textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
            textView.setPadding(128, 0, 0, 0);
            return textView;
        }

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

        public Object getGroup(int groupPosition) {
            return groups[groupPosition];
        }

        public int getGroupCount() {
            return groups.length;
        }

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

        public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
                ViewGroup parent) {
            TextView textView = getGenericView();
            textView.setText(getGroup(groupPosition).toString());
            return textView;
        }

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

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

第 31 行我无法弄清楚如何让超级引用类接受子数组，因为它被列为另一个类的私有。请帮忙。我不确定我是否需要在活动类中创建一个 2D 数组并将其传递给包含在子项中的数据或确切需要做什么。谢谢。

4

1 回答 1

0

您正在尝试将二维字符串数组连接到字符串！去除那个 [][]

    String testName = children[groupPosition][childPosition];
    try {
        Class clazz = Class.forName("com.soraingraven.suprRef." + testName);
于 2012-06-27T00:52:12.110 回答