Android(安卓)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
16lz
2021-01-26
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
参考：http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2014/0808/1643.html
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
xml 根布局命名：
- Eclipse：xmlns:app="http://schemas.android.com/apk/res/youpackge"
- AndroidStudio: xmlns:app="http://schemas.android.com/apk/res_atuo"
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