有個小伙伴遇到了這樣一個問題，就是AutoCompleteTextView實現自動填充的功能。同時要具備手機格式化的功能。下拉列表最后一行是有個清除歷史的功能。可是點擊“清除歷史”卻把文字要設置進去AutoCompleteTextView中。這樣的效果顯然很糟糕。所以我就寫了這樣一個簡單的demo。來幫助遇到這種問題的朋友解決這樣一個問題。二話不多說直接上代碼。
布局文件（activity_main.xml）代碼如下：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Please input:" /> <AutoCompleteTextView android:id="@+id/actv" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout>
java文件（MainActivity.java）代碼如下：
import android.app.Activity;import android.os.Bundle;import android.text.Editable;import android.text.Selection;import android.text.TextWatcher;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {private AutoCompleteTextView mAutoCompleteTextView;private String[] mAutoStrs = new String[] { "138 0013 8000", "13800138001", "13800138002", "13800138003", "13800138004", "138 0013 800清除記錄" };private String mBeforeTextChangedStr = "";public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mAutoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.actv); ArrayAdapter<String> _arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, mAutoStrs); mAutoCompleteTextView.setAdapter(_arrayAdapter); mAutoCompleteTextView.setThreshold(1);// 設置輸入一個字符就提示 mAutoCompleteTextView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { String _clearStr = ""; if (arg1 instanceof TextView) { _clearStr = ((TextView) arg1).getText().toString(); } if (_clearStr.equals("138 0013 800清楚記錄")) { mAutoCompleteTextView.setText(mBeforeTextChangedStr); Editable _editable = mAutoCompleteTextView.getText(); Selection.setSelection(_editable, _editable.length()); Toast.makeText(MainActivity.this, "清除成功了!", Toast.LENGTH_LONG).show(); } } }); phoneNumAddSpaceOne(mAutoCompleteTextView);}/*** 手機號格式化代碼* * @param editText* EditText對象*/public void phoneNumAddSpaceOne(final EditText editText) { editText.addTextChangedListener(new TextWatcher() { private int start; private int before; private StringBuilder stringBuilder; @Override public void onTextChanged(CharSequence s, int start, int before, int count) { this.start = start; this.before = before; } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { String _str = s.toString(); if (!isNumeric(_str.replace(" ", ""))) { return; } mBeforeTextChangedStr = _str; // 手機號格式化xxx xxxx xxxx if (s == null || s.length() == 0) return; if (stringBuilder == null) { stringBuilder = new StringBuilder(); } else { stringBuilder.delete(0, stringBuilder.length()); } for (int i = 0; i < s.length(); i++) { if (i != 3 && i != 8 && s.charAt(i) == ' ') { continue; } else { stringBuilder.append(s.charAt(i)); if ((stringBuilder.length() == 4 || stringBuilder .length() == 9)&& stringBuilder.charAt(stringBuilder.length() - 1) != ' ') { stringBuilder.insert(stringBuilder.length() - 1,' '); } } } if (!stringBuilder.toString().equals(s.toString())) { int index = start + 1; if (stringBuilder.charAt(start) == ' ') { if (before == 0) { index++; } else { index--; }} else { if (before == 1) { index--; }} editText.setText(stringBuilder.toString()); editText.setSelection(index);}}});}/*** 判斷字符串是否是數字* * @param str* 需要判斷的字符串* @return*/public boolean isNumeric(String str) { for (int i = str.length(); --i >= 0;) { int chr = str.charAt(i); if (chr < 48 || chr > 57) return false; } return true; }}以上所述是小編給大家介紹的Android中使用 AutoCompleteTextView 實現手機號格式化附帶清空歷史的操作，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對武林網網站的支持！
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