ListPopupWindow使用完整示例(二)——自定义ListPopupWindow

MainActivity如下:

 

package cc.wy;

import java.util.ArrayList;
import android.app.Activity;
import android.app.ActionBar.LayoutParams;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListPopupWindow;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
/**
 * Demo描述:
 * ListPopupWindow使用完整示例(二)——自定义ListPopupWindow
 *
 * 参考资料:
 * 1 http://blog.csdn.net/rambomatrix/article/details/23525379
 * 2 http://blog.csdn.net/jsnrwzm/article/details/14408835
 *   Thank you very much
 *
 */
public class MainActivity extends Activity {
    private Context mContext;
    private Button mButton;
    private ArrayList<String> mArrayList;
    private ListPopupWindow mListPopupWindow;
    private ListPopupWindowAdapter mListPopupWindowAdapter;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        init();
    }

    private void init(){
        mContext=this;
        mArrayList=new ArrayList<String>();
        mArrayList.add("第一个子项");
        mArrayList.add("第二个子项");
        mArrayList.add("第三个子项");
        mListPopupWindow=new ListPopupWindow(mContext);
        //自定义Adapter
        mListPopupWindowAdapter=new ListPopupWindowAdapter(mArrayList, mContext);
        mListPopupWindow.setAdapter(mListPopupWindowAdapter);
        //mListPopupWindow.setBackgroundDrawable(mContext.getResources().getDrawable(R.drawable.ic_launcher));
        mListPopupWindow.setWidth(200);
        mListPopupWindow.setHeight(LayoutParams.WRAP_CONTENT);
        mListPopupWindow.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int position,long arg3) {
                Toast.makeText(mContext, "点击了"+mArrayList.get(position), Toast.LENGTH_SHORT).show();
            }
        });
        mButton=(Button) findViewById(R.id.button);
        mButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                //指定anchor
                mListPopupWindow.setAnchorView(v);
                mListPopupWindow.show();
            }
        });
    }
}

ListPopupWindowAdapter如下:

package cc.wy;

import java.util.ArrayList;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class ListPopupWindowAdapter extends BaseAdapter {
    private ArrayList<String> mArrayList;
    private Context mContext;
    public ListPopupWindowAdapter(ArrayList<String> list, Context context) {
        super();
        this.mArrayList = list;
        this.mContext = context;
    }

    @Override
    public int getCount() {
        if (mArrayList == null) {
            return 0;
        } else {
            return this.mArrayList.size();
        }
    }

    @Override
    public Object getItem(int position) {
        if (mArrayList == null) {
            return null;
        } else {
            return this.mArrayList.get(position);
        }
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = LayoutInflater.from(mContext).inflate(R.layout.item, null, false);
            holder.itemTextView = (TextView) convertView.findViewById(R.id.itemTextView);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        if (this.mArrayList != null) {
            final String itemName = this.mArrayList.get(position);
            if (holder.itemTextView != null) {
                holder.itemTextView.setText(itemName);
            }
        }

        return convertView;

    }

    private class ViewHolder {
        TextView itemTextView;
    }

}

main.xml如下:

 

 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <Button
        android:id="@+id/button"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="点击弹出自定义ListPopupWindow" />

</RelativeLayout>

item.xml如下:

 

 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <TextView
        android:id="@+id/itemTextView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
         />

</RelativeLayout>