AutoCompleteTextView自动补全文本框

AutoCompleteTextView的作用是在输入框中输入我们想要输入的信息，就会出现其他与其相关的提示信息

下面是实例代码：

MainActivity.java

package com.shaoxin.myautocompletetextview;

import android.content.ContentResolver;

import android.content.Context;

import android.database.Cursor;

import android.os.Bundle;

import android.provider.ContactsContract;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.AutoCompleteTextView;

import android.widget.CursorAdapter;

import android.widget.TextView;

import java.util.ArrayList;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    private AutoCompleteTextView autoCompleteTextView;

    private String[] strings = {"aaa", "aabb", "aabc"};

    private ArrayAdapter arrayAdapter;

    private ContentResolver contentResolver;

    private List list;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //自动补全文本框

        autoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);

        //内容解析器

        contentResolver = getContentResolver();

        list = new ArrayList();

        //光标接受内容解析器所解析的内容，调用电话薄，记住要加权限

        Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, new String[]{"_id", "data1", "display_name"},

                null, null, null);

        //光标下移，将指向的内容存入集合当中

        while (cursor.moveToNext()) {

            String string = cursor.getString(1);

            list.add(string);

        }

        //        arrayAdapter = new ArrayAdapter(MainActivity.this, android.R.layout.simple_list_item_1, list);

        //        autoCompleteTextView.setAdapter(arrayAdapter);

        MyAdapter myAdapter = new MyAdapter(MainActivity.this, cursor);

        autoCompleteTextView.setAdapter(myAdapter);

    }

    //自定义适配器，继承光标适配器

    class MyAdapter extends CursorAdapter {

        MyAdapter(Context context, Cursor c) {

            super(context, c);

        }

        @Override

        public View newView(Context context, Cursor cursor, ViewGroup parent) {

            //视图填充

            View view = View.inflate(MainActivity.this, R.layout.auto_view, null);

            return view;

        }

        @Override

        public void bindView(View view, Context context, Cursor cursor) {

            TextView textView = (TextView) view.findViewById(R.id.txt);

            textView.setText(cursor.getString(1));

        }

    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/activity_main"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="com.shaoxin.myautocompletetextview.MainActivity">

    <AutoCompleteTextView

        android:id="@+id/autoCompleteTextView"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:completionThreshold="1"

        android:text="请输入内容" />

</RelativeLayout>

auto_view.xml

<?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="vertical">

    <ImageView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:src="@mipmap/ic_launcher" />

    <TextView

        android:id="@+id/txt"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

</LinearLayout>

将代码直接导入运行即可