Android 实现自定义属性 declare-styleable扩展 方法 &Eclipse/AndroidStudio xml 工具空间声明注意点
自定义控件实现EditText输入 一键删除功能
实现步骤：
- 1、 自定义LineEdittext 继承 EditText类
- 2、 添加扩展属性 设置drawable left right Image图标
- 3、 添加焦点监听接口、添加Edittext输入字符监听 onTounchEvent 重写
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.annotation.ColorRes;
import android.support.annotation.DrawableRes;
import android.support.annotation.IntegerRes;
import android.text.Editable;
import android.text.InputFilter;
import android.text.InputType;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.text.method.PasswordTransformationMethod;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;
import ejiang.teacher.R;
import ejiang.teacher.common.DisplayUtils;
/**
* Created by ejiang on 2017-03-31.
*
* @author Mr.Zang
*/
public class LineEditText extends EditText implements TextWatcher,
View.OnFocusChangeListener {
private int color;
private int status = 2;
private Context mContext;
/**
* 是否获取焦点，默认没有焦点
*/
private boolean hasFocus = false;
/**
* 手指抬起时的X坐标
*/
private int xUp = 0;
/*header--UnSelecte--*/
private Drawable mLeftHender;
/*header--Selecte*/
private Drawable mLeftHenderSelete;
/*belecte--Infromation_btn*/
private Drawable del_btn;
/*textsize*/
@IntegerRes
private int textsize;
/*textcolor*/
@ColorRes
private int textColor;
/*textHintColor*/
@ColorRes
private int textHintColor;
@DrawableRes
@ColorRes
private int viewBackGround = R.drawable.bg_edittext; //背景颜色
@DrawableRes
private int userHeaderUn = R.drawable.login_user;
@DrawableRes
private int userHeaderSel = R.drawable.login_user_seletor;
public LineEditText(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
init(attrs);
}
/**
* 设置userHender图标
*
* @param userHender --未选中or未获得焦点的Hender图标
* @param userHenderSelect
*/
public void setUserHender(@DrawableRes int userHender, @DrawableRes int userHenderSelect) {
if (mContext != null) {
this.mLeftHender = getLocalDrawbleRes(userHender);
this.mLeftHenderSelete = getLocalDrawbleRes(userHenderSelect);
}
}
private void init(AttributeSet attrs) {
if (mContext != null && attrs != null) {
TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.LineEditText);
viewBackGround = a.getResourceId(R.styleable.LineEditText_editBackground, viewBackGround);
userHeaderUn = a.getResourceId(R.styleable.LineEditText_userHeaderUn, userHeaderUn);
userHeaderSel = a.getResourceId(R.styleable.LineEditText_userHenderSel, userHeaderSel);
a.recycle();
}
//设置背景颜色 --样式
setBackgroundResource(viewBackGround);
/*设置删除按钮样式*/
del_btn = mContext.getResources().getDrawable(R.drawable.login_delete);
/*userHendler图标*/
mLeftHender = getLocalDrawbleRes(userHeaderUn);
mLeftHenderSelete = getLocalDrawbleRes(userHeaderSel);
mLeftHender.setBounds(0, 0, mLeftHender.getMinimumWidth(), mLeftHender.getMinimumHeight());
setCompoundDrawablesWithIntrinsicBounds(mLeftHender, null, null, null); //设置user图标
// setInputType(InputType.TYPE_CLASS_NUMBER); //设置输入模式 --数字
// setTransformationMethod(PasswordTransformationMethod.getInstance()); //设置输入不可见
// setFilters(new InputFilter[]{new InputFilter.LengthFilter(6)}); //设置可输入的字符长度
// setHint(R.string.login_password); //设置hint提示
// setHintTextColor(mContext.getResources().getColor(R.color.color_no_year_book)); //设置hint颜色
// setTextSize(DisplayUtils.Px2Sp(mContext, 32)); //设置字体大小
// setCompoundDrawablePadding(DisplayUtils.Dp2Px(mContext, 10)); //设置Padding
addListeners(); //设置监听
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
}
/**
* 获取本地Drawble对象
*
* @param drawableRes
* @return
*/
private Drawable getLocalDrawbleRes(@DrawableRes int drawableRes) {
return mContext.getResources().getDrawable(drawableRes);
}
// 处理删除事件
@Override
public boolean onTouchEvent(MotionEvent event) {
if (del_btn != null && event.getAction() == MotionEvent.ACTION_UP) {
// 获取点击时手指抬起的X坐标
xUp = (int) event.getX();
Log.e("xUp", xUp + "");
/*Rect rect = new Rect();
getGlobalVisibleRect(rect);
rect.left = rect.right - 50;*/
// 当点击的坐标到当前输入框右侧的距离小于等于getCompoundPaddingRight()的距离时，则认为是点击了删除图标
if ((getWidth() - xUp) <= getCompoundPaddingRight()) {
if (!TextUtils.isEmpty(getText().toString())) {
setText("");
}
}
}
return super.onTouchEvent(event);
}
/**
* 添加监听回调
*/
private void addListeners() {
try {
setOnFocusChangeListener(this);
addTextChangedListener(this);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 改变焦点监听
*
* @param focused
* @param direction
* @param previouslyFocusedRect
*/
@Override
protected void onFocusChanged(boolean focused, int direction,
Rect previouslyFocusedRect) {
super.onFocusChanged(focused, direction, previouslyFocusedRect);
this.hasFocus = focused;
if (focused) {
setCompoundDrawablesWithIntrinsicBounds(mLeftHenderSelete, null, null, null);
postInvalidate();
} else {
}
}
@Override
protected void finalize() throws Throwable {
super.finalize();
}
/**
* 设置文字颜色
*
* @param color
*/
public void setColor(int color) {
this.color = color;
this.setTextColor(color);
invalidate();
}
//TextWatcher
@Override
public void afterTextChanged(Editable arg0) {
postInvalidate();
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
if (TextUtils.isEmpty(arg0)) {
// 如果为空，则不显示删除图标
setCompoundDrawablesWithIntrinsicBounds(mLeftHender, null, null, null);
} else {
// 如果非空，则要显示删除图标
setCompoundDrawablesWithIntrinsicBounds(mLeftHenderSelete, null, del_btn, null);
}
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int after) {
if (hasFocus) {
if (TextUtils.isEmpty(s)) {
// 如果为空，则不显示删除图标
setCompoundDrawablesWithIntrinsicBounds(mLeftHender, null, null, null);
} else {
// 如果非空，则要显示删除图标
setCompoundDrawablesWithIntrinsicBounds(mLeftHenderSelete, null, del_btn, null);
}
}
}
//View.onFocusChangeListener
@Override
public void onFocusChange(View arg0, boolean arg1) {
try {
this.hasFocus = arg1;
} catch (Exception e) {
e.printStackTrace();
}
}
}
declare-styleable 设置 res/value/attrs.xml
<declare-styleable name="LineEditText">
<attr name="editBackground" format="reference"/>
<attr name="userHeaderUn" format="reference"/>
<attr name="userHenderSel" format="reference"/>
<attr name="delteInformation" format="reference"/>
<attr name="edithint" format="string|reference"/>
<attr name="edithintColor" format="integer|reference"/>
</declare-styleable>
xml 根布局命名：
