Android基础小技术点：Android ListView设置背景图片及分割线、周边距

以Android小机器人作为ListView的背景图片，增加ListView的周边距离，分割线透明，效果如图所示：

主要是通过布局文件实现。给出代码实现activity_main.xml：

<RelativeLayout 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"
    android:background="@drawable/ic_launcher" >

    <!--         
    	最新版本的Android ListView可以不用设置这两项
		android:cacheColorHint="#00000000"
        android:scrollingCache="false"
        -->
    <ListView
        android:id="@+id/android:list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dip"
        android:divider="#00000000"
        android:dividerHeight="10dip"
        android:fadingEdge="none"/>

</RelativeLayout>           

测试的主Activity MainActivity.java：

package zhangphil.demo;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {

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

		ListView list = (ListView) findViewById(android.R.id.list);

		String[] data = new String[100];
		for (int i = 0; i < data.length; i++) {
			data[i] = "数据" + i;
		}

		list.setAdapter(new MyArrayAdapter(this, android.R.layout.simple_list_item_1, data));
	}

	private class MyArrayAdapter extends ArrayAdapter<String> {

		private String[] data;
		private LayoutInflater layoutInflater;
		private int resource;

		public MyArrayAdapter(Context context, int resource, String[] data) {
			super(context, resource);
			this.data = data;
			this.resource = resource;
			this.layoutInflater = LayoutInflater.from(context);
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			if (convertView == null)
				convertView = layoutInflater.inflate(resource, null);

			TextView text = (TextView) convertView.findViewById(android.R.id.text1);
			text.setText(getItem(position));

			convertView.setBackgroundColor(0xff80deea);
			// convertView.getBackground().setAlpha(128);

			return convertView;
		}

		@Override
		public String getItem(int pos) {
			return data[pos];
		}

		@Override
		public int getCount() {
			return data.length;
		}
	}
}