自定义二级联动

<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" >

<ListView
android:id="@+id/lv_left"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
</ListView>

<ListView
android:id="@+id/lv_right"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2" >
</ListView>

</LinearLayout>

package com.example.defindcontroler;

import java.util.Map;
import java.util.Set;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class Er extends LinearLayout {
Context mContext;
private View myView;
private ListView lv_left;
private ListView lv_right;
private Map<String, String[]> mMap;
private MyAdapter myAdapter;
private RightItemClickListener mRightItemClickListener;
private String mLeftResult;
private String mRightResult;
private String[] rightDatas;
private String[] leftDatas;
private MyAdapter myRightAdapter;

public Er(Context context) {
this(context, null);
}

public Er(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
/* 先让自定义联动不可见 */
this.setVisibility(View.INVISIBLE);
}

private void initView() {
/* 为左边listview设置内容和适配 */
myAdapter = new MyAdapter();
leftDatas = mMap.keySet().toArray(new String[0]);
myAdapter.setAdapterData(leftDatas);
lv_left.setAdapter(myAdapter);

/* 为右边listview设置内容和适配 */

myRightAdapter = new MyAdapter();
rightDatas = mMap.get(leftDatas[0]);
myRightAdapter.setAdapterData(rightDatas);
lv_right.setAdapter(myRightAdapter);
/* 为左边listview设置点击事件 */
lv_left.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
mLeftResult = leftDatas[position];
/* 根据左边listview的点击结果设置右边listview的内容 */
rightDatas = mMap.get(mLeftResult);
myRightAdapter.setAdapterData(rightDatas);
lv_right.setAdapter(myRightAdapter);

/* 设置右边listview的点击事件 这里调用自定义的事件 */
lv_right.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
mRightResult = rightDatas[position];
/* 调用setOnRightItemClickListener所设置的事件 */
mRightItemClickListener.onItemClick();

}
});

}
});

}

private void initData() {
myView = LayoutInflater.from(mContext).inflate(R.layout.activity_er,
this);
lv_left = (ListView) myView.findViewById(R.id.lv_left);
lv_right = (ListView) myView.findViewById(R.id.lv_right);

}
public interface RightItemClickListener {
void onItemClick();
}
/**
*
* 为右侧的listview设置点击事件
*/
public void setOnRightItemClickListener(
RightItemClickListener rightItemClickListener) {
mRightItemClickListener = rightItemClickListener;
}

/**
* 为联动设置数据
*
* @param map
*           需要显示的内容 key 为左边的内容 value是右边要显示的内容
*
* */
public void setData(Map<String, String[]> map) {
mMap = map;
initData();

initView();
}

/**
* 得到点击结果
*
* @return 左边点击内容+右边点击内容
*
*
* */
public String getResult() {
return mLeftResult + mRightResult;
}

public class MyAdapter extends BaseAdapter {
String[] mItemArr;

public void setAdapterData(String[] itemSet) {
mItemArr = itemSet;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return mItemArr.length;
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView textView = new TextView(mContext);
textView.setText(mItemArr[position]);
return textView;
}
}

}