AutoCompleteTextView實作搜尋提示功能的實作

AutoCompleteTextView和EditText元件類似，都可以輸入文本。但AutoCompleteTextView元件可以和一個字元串數組或List對象綁定，當使用者輸入兩個及以上字元時，系統将在AutoCompleteTextView元件下方列出字元串數組中所有以輸入字元開頭的字元串，這一點和www.google.com的搜尋框非常相似，當輸入某一個要查找的字元串時，google搜尋框就會列出以這個字元串開頭的最熱門的搜尋字元串清單。

package com.loaderman.demo;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView() {
        AutoCompleteTextView nameText = (AutoCompleteTextView)this.findViewById(R.id.name);
        String[] names = {"dfef", "dqwdasd", "dasd", "qwqw" , "qwsd", "dqwd", "abc", "acc"};
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, names);
        nameText.setAdapter(adapter);
    }
}
      

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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:orientation="vertical"
    tools:context="com.loaderman.asynctaskdemo.MainActivity">
    <AutoCompleteTextView
        android:id="@+id/name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:completionThreshold="1"/>

</LinearLayout>