前言
对常用组件进行封装可以使开发事半功倍，比如这篇介绍的带删除功能和字符串格式功能的EditText
思路:
对多个系统View 进行整合，将具有删除功能的img封装到EditText中，然后可以对字符进行格式化的功能以接口
形式对外暴露，具体实现给调用方。方便多项目移植并且达到功能上解耦。
效果图
如上图， 手机号码进行 344 分割，获取焦点后 删除img显示，失去光标则消失 删除img。看到这里是不是已经有自己封装方式了。
源码
package com.nuoyuan.xd.widget;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.support.v7.widget.AppCompatEditText;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import com.nuoyuan.xd.R;
/**
* by weichyang 2017/10/13 14:52
* 1.自包含删除图标
* 2.规则定制
*/
public class NyCompatEditText extends AppCompatEditText implements View.OnFocusChangeListener, View.OnTouchListener, TextWatcher {
/**
* 关闭图片
*/
private Drawable mClearTextIcon;
/**
* 焦点监听回调
*/
private OnFocusChangeListener mOnFocusChangeListener;
/**
* 规则接口
*/
private EditerRuler editerRuler;
private OnTouchListener mOnTouchListener;
private Context mContext;
private Drawable dRight;
public NyCompatEditText(Context context) {
super(context);
init(context);
}
public NyCompatEditText(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public NyCompatEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}
private void init(Context context) {
this.mContext = context;
mClearTextIcon = getCompoundDrawables()[2];
if (mClearTextIcon == null) {
final Drawable drawable = ContextCompat.getDrawable(context, R.drawable.iconclose);
final Drawable wrapDrawable = DrawableCompat.wrap(drawable);
DrawableCompat.setTint(wrapDrawable, getCurrentHintTextColor());
mClearTextIcon = wrapDrawable;
}
mClearTextIcon.setBounds(0, 0, mClearTextIcon.getIntrinsicHeight(), mClearTextIcon.getIntrinsicHeight());
setClearIconVisible(false);
super.setOnFocusChangeListener(this);
super.setOnTouchListener(this);
addTextChangedListener(this);
}
public void setmOnFocusChangeListener(OnFocusChangeListener mOnFocusChangeListener) {
this.mOnFocusChangeListener = mOnFocusChangeListener;
}
public void setmOnTouchListener(OnTouchListener mOnTouchListener) {
this.mOnTouchListener = mOnTouchListener;
}
public void addEditerRuler(EditerRuler editerRuler) {
this.editerRuler = editerRuler;
}
private void setClearIconVisible(boolean visible) {
mClearTextIcon.setVisible(visible, false);
final Drawable[] compoundDrawables = getCompoundDrawables();
setCompoundDrawables(
compoundDrawables[0],
compoundDrawables[1],
visible ? mClearTextIcon : null,
compoundDrawables[3]);
}
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
setClearIconVisible(getText().length() > 0);
} else {
setClearIconVisible(false);
}
if (mOnFocusChangeListener != null) {
mOnFocusChangeListener.onFocusChange(v, hasFocus);
}
}
@Override
public boolean onTouch(View v, MotionEvent motionEvent) {
int x = (int) motionEvent.getX();
if (mClearTextIcon.isVisible() && x > getWidth() - getPaddingRight() - mClearTextIcon.getIntrinsicWidth()) {
if (motionEvent.getAction() == motionEvent.ACTION_UP) {
setError(null);
setText("");
}
return true;
}
return (mOnTouchListener != null && mOnTouchListener.onTouch(v, motionEvent));
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
Log.d("beforeTextChanged", " s:" + s + " start:" + start + " count:" + count + " after:" + after);
}
@Override
public void onTextChanged(CharSequence s, int start, int lengthBefore, int lengthAfter) {
if (isFocused()) {
setClearIconVisible(s.length() > 0);
}
if (s == null || s.length() == 0) return;
if (editerRuler != null) {
String[] afterRuler = editerRuler.runRulerForResult(s, start, lengthBefore);
if (afterRuler != null && (afterRuler.length > 0 && afterRuler.length == 2)) {
this.setText(afterRuler[0]);
this.setSelection(afterRuler[1] == null ? 0 : Integer.valueOf(afterRuler[1]));
}
}
}
@Override
public void afterTextChanged(Editable s) {
}
}
关键地方就是针对 光标处理，以及规则获取。这里以接口形式对外发布规则接口。
规则接口
/**
* Created by weichyang on 2017/10/13.
*/
public interface EditerRuler {
/**
* 外部设置edit规则
* @param s 设置string
* @param start
* @param lengthBefore
*/
String[] runRulerForResult(CharSequence s,
int start,
int lengthBefore);
}
规则实现类
package com.nuoyuan.xd.widget;
/**
* Author: weichyang
* Date: 2017/10/13
* Description: editer 规则实现类
*
* 手机号码
* 身份证号码
*/
public class EditerRulerImpl implements EditerRuler {
@Override
public String[] runRulerForResult(CharSequence s, int start, int lengthBefore) {
return getFormatPhoneNum(s,start,lengthBefore);
}
/**
* 手机号码规则
* @param s
* @param start
* @param lengthBefore
* @return
*/
private String[] getFormatPhoneNum(CharSequence s, int start, int lengthBefore){
//手机号格式化xxx xxxx xxxx
String[] result= new String[2];
StringBuilder sb = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
if (i != 3 && i != 8 && s.charAt(i) == ' ') {
continue;
} else {
sb.append(s.charAt(i));
if ((sb.length() == 4 || sb.length() == 9) && sb.charAt(sb.length() - 1) != ' ') {
sb.insert(sb.length() - 1, ' ');
}
}
}
if (!sb.toString().equals(s.toString())) {
int index = start + 1;
if (sb.charAt(start) == ' ') {
if (lengthBefore == 0) {
index++;
} else {
index--;
}
} else {
if (lengthBefore == 1) {
index--;
}
}
result[0]=sb.toString();
result[1]=String.valueOf(index);
return result;
}
return null;
}
}
如上，所有规则定制，放入规则实现类。用到那个规则调用那个规则，这里这些了一个手机号码段分割规则。其他自行脑补。
调用地方
editPhoneNumber.addEditerRuler(new EditerRulerImpl());
直接将规则实现类，传进入。ok
