SettingTextWatcher.java
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package com.iflytek.speech.util;
import java.util.regex.Pattern;
import android.content.Context;
import android.preference.EditTextPreference;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.widget.Toast;
/**
* 输入框输入范围控制
*/
public class SettingTextWatcher implements TextWatcher {
private int editStart ;
private int editCount ;
private EditTextPreference mEditTextPreference;
int minValue;//最小值
int maxValue;//最大值
private Context mContext;
public SettingTextWatcher(Context context,EditTextPreference e,int min, int max) {
mContext = context;
mEditTextPreference = e;
minValue = min;
maxValue = max;
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// Log.e("demo", "onTextChanged start:"+start+" count:"+count+" before:"+before);
editStart = start;
editCount = count;
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,int after) {
// Log.e("demo", "beforeTextChanged start:"+start+" count:"+count+" after:"+after);
}
@Override
public void afterTextChanged(Editable s) {
if (TextUtils.isEmpty(s)) {
return;
}
String content = s.toString();
// Log.e("demo", "content:"+content);
if (isNumeric(content)) {
int num = Integer.parseInt(content);
if (num > maxValue || num < minValue) {
s.delete(editStart, editStart+editCount);
mEditTextPreference.getEditText().setText(s);
Toast.makeText(mContext, "超出有效值范围", Toast.LENGTH_SHORT).show();
}
}else {
s.delete(editStart, editStart+editCount);
mEditTextPreference.getEditText().setText(s);
Toast.makeText(mContext, "只能输入数字哦", Toast.LENGTH_SHORT).show();
}
}
/**
* 正则表达式-判断是否为数字
*/
public static boolean isNumeric(String str){
Pattern pattern = Pattern.compile("[0-9]*");
return pattern.matcher(str).matches();
}
};