要想改為其他的分隔符需再寫個類

SemicolonTokenizer類

package com.example.android_06;

import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextUtils;
import android.widget.MultiAutoCompleteTextView;

public class SemicolonTokenizer implements MultiAutoCompleteTextView.Tokenizer {
    private char charS;
    private String mSTring;

    //構造方法
    public SemicolonTokenizer(char charS) {
        this.charS = charS;
        mSTring = String.valueOf(charS);
    }

    public int findTokenStart(CharSequence text, int cursor) {
        int i = cursor;
        while (i > 0 && text.charAt(i - 1) != charS) {
            i--;
        }
        while (i < cursor && text.charAt(i) == ' ') {
            i++;
        }
        return i;
    }

    public int findTokenEnd(CharSequence text, int cursor) {
        int i = cursor;
        int len = text.length();
        while (i < len) {
            if (text.charAt(i) == charS) {
                return i;
            } else {
                i++;
            }
        }
        return len;
    }

    public CharSequence terminateToken(CharSequence text) {
        int i = text.length();
        while (i > 0 && text.charAt(i - 1) == ' ') {
            i--;
        }

        if (i > 0 && text.charAt(i - 1) == charS) {
            return text;
        } else {
            if (text instanceof Spanned) {
                SpannableString sp = new SpannableString(text + mSTring);
                TextUtils.copySpansFrom((Spanned) text, 0, text.length(), Object.class, sp, 0);
                return sp;
            } else {
                return text + mSTring;
            }
        }
    }
}
 

MainActivity類

package com.example.android_06;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.MultiAutoCompleteTextView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity {
//     高階控制元件搜尋提示框(多次提示)
    private String[] data4;
    private ArrayAdapter adapter4;
    private MultiAutoCompleteTextView mactv_main_context;



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

        /**
         *  高階控制元件搜尋提示框(多次提示)(作業)
         */
        data4 =  new String[]{ "憤怒的小鳥", "湯姆貓", "落湯雞", "牛牛", "哈巴狗", "神龍", "烤鴨", "小象", "美人魚", "九尾狐" };
        adapter4 = new ArrayAdapter(this,R.layout.actv_main_item1,data4);
        MultiAutoCompleteTextView.Tokenizer t = new MultiAutoCompleteTextView.CommaTokenizer();

        mactv_main_context.setTokenizer(t);
//設定你想要的分隔符
        mactv_main_context.setTokenizer(new SemicolonTokenizer(';'));
        mactv_main_context.setAdapter(adapter4);

    }

    /**
     * 初始化
      */
    public void initView(){
        actv_main_context = findViewById(R.id.actv_main_context);
        spinner_main_img = findViewById(R.id.spinner_main_img);
        mactv_main_context = findViewById(R.id.mactv_main_context);
    }
}