// 通过Activity获取

LayoutInflaterinflater=getLayoutInflater();// 通过静态方法获取

LayoutInflaterinflater=LayoutInflater.from(context);// 通过系统服务获取

LayoutInflaterinflater= (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent"><ListViewandroid:id="@+id/listview"android:layout_width="match_parent"android:layout_height="wrap_content" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="horizontal"android:gravity="center_vertical"><ImageViewandroid:id="@+id/letter_img"android:layout_width="50dp"android:layout_height="50dp"android:padding="5dp"android:src="@mipmap/ic_launcher"/><TextViewandroid:id="@+id/content_tv"android:layout_width="wrap_content"android:layout_height="wrap_content"android:textSize="24sp"android:textColor="#b6400e"/>
</LinearLayout>

package com.jinyu.cqkxzsxy.android.listviewsample.adapter;import android.app.Activity;
import android.support.annotation.NonNull;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;import com.jinyu.cqkxzsxy.android.listviewsample.R;/*** @创建者 鑫鱻* @描述 Android零基础入门到精通系列教程，欢迎关注微信公众号ShareExpert*/
public class MyArrayAdapter extends ArrayAdapter {private Activity mContext = null; // 上下文环境private int mResourceId; // 列表项布局资源IDprivate String[] mItems; // 列表内容数组public MyArrayAdapter(Activity context, int resId, String[] items){super(context, resId, items);// 保存参数mContext = context;mResourceId = resId;mItems = items;}@NonNull@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// 获取LayoutInflater对象LayoutInflater inflater = mContext.getLayoutInflater();// 装载列表项视图View itemView = inflater.inflate(mResourceId, null);// 获取列表项之组件TextView contentTv = (TextView) itemView.findViewById(R.id.content_tv);ImageView letterImg = (ImageView) itemView.findViewById(R.id.letter_img);// 取出要显示的数据String content = mItems[position].trim();// 给TextView设置显示值
        contentTv.setText(content);// 根据内容首字母判断要显示的图标if(content.startsWith("a") || content.startsWith("A")) {letterImg.setImageResource(R.drawable.letter_a);} else if(content.startsWith("b") || content.startsWith("B")) {letterImg.setImageResource(R.drawable.letter_b);} else if(content.startsWith("c") || content.startsWith("C")) {letterImg.setImageResource(R.drawable.letter_c);} else if(content.startsWith("d") || content.startsWith("D")) {letterImg.setImageResource(R.drawable.letter_d);} else if(content.startsWith("e") || content.startsWith("E")) {letterImg.setImageResource(R.drawable.letter_e);}// 返回列表项视图return itemView;}
}

package com.jinyu.cqkxzsxy.android.listviewsample;import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ListView;import com.jinyu.cqkxzsxy.android.listviewsample.adapter.MyArrayAdapter;public class CustomArrayAdapterActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.custom_arrayadapter_layout);// 获取界面组件ListView listView = (ListView) findViewById(R.id.listview);// 定义要显示的数组String[] contents = {"Android", "demo", "Edit", "APP", "excel","dota", "Button", "Circle", "excel", "back"};// 将数组包装为自定义MyArrayAdapterMyArrayAdapter adapter = new MyArrayAdapter(this, R.layout.custom_arrayadapter_item, contents);// 为ListView设置Adapter
        listView.setAdapter(adapter);}
}