有个小伙伴遇到了这样一个问题，就是AutoCompleteTextView实现自动填充的功能。同时要具备手机格式化的功能。下拉列表最后一行是有个清除历史的功能。可是点击“清除历史”却把文字要设置进去AutoCompleteTextView中。这样的效果显然很糟糕。所以我就写了这样一个简单的demo。来帮助遇到这种问题的朋友解决这样一个问题。二话不多说直接上代码。
布局文件（activity_main.xml）代码如下：
<?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）代码如下：
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清除记录" }; 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);// 设置输入一个字符就提示 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清楚记录")) { 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); } /** * 手机号格式化代码 * * @param editText * EditText对象 */ 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; // 手机号格式化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); } } }); } /** * 判断字符串是否是数字 * * @param str * 需要判断的字符串 * @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; } }
以上所述是小编给大家介绍的Android中使用 AutoCompleteTextView 实现手机号格式化附带清空历史的操作，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！