基本信息
源码名称:Android 带清除功能的输入框控件ClearEditText 源码下载
源码大小:4.69KB
文件格式:.java
开发语言:Java
更新时间:2014-08-21
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源码介绍
package com.example.clearedittext; import android.content.Context; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.text.Editable; import android.text.TextWatcher; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.View.OnFocusChangeListener; import android.view.animation.Animation; import android.view.animation.CycleInterpolator; import android.view.animation.TranslateAnimation; import android.widget.EditText; public class ClearEditText extends EditText implements OnFocusChangeListener, TextWatcher { private Drawable mClearDrawable; private boolean hasFoucs; public ClearEditText(Context context) { this(context, null); } public ClearEditText(Context context, AttributeSet attrs) { this(context, attrs, android.R.attr.editTextStyle); } public ClearEditText(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(); } private void init() { mClearDrawable = getCompoundDrawables()[2]; if (mClearDrawable == null) { mClearDrawable = getResources().getDrawable(R.drawable.delete_selector); } mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight()); setClearIconVisible(false); setOnFocusChangeListener(this); addTextChangedListener(this); } /** * event.getX() 获取相对应自身左上角的X坐标 * event.getY() 获取相对应自身左上角的Y坐标 * getWidth() 获取控件的宽度 * getTotalPaddingRight() 获取删除图标左边缘到控件右边缘的距离 * getPaddingRight() 获取删除图标右边缘到控件右边缘的距离 * getWidth() - getTotalPaddingRight() 计算删除图标左边缘到控件左边缘的距离 * getWidth() - getPaddingRight() 计算删除图标右边缘到控件左边缘的距离 */ @Override public boolean onTouchEvent(MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_UP) { if (getCompoundDrawables()[2] != null) { //判断触摸点是否在水平范围内 boolean isInnerWidth = event.getX() > (getWidth() - getTotalPaddingRight()) && (event.getX() < ((getWidth() - getPaddingRight()))); //获取删除图标的边界,返回一个Rect对象 Rect rect = getCompoundDrawables()[2].getBounds(); //获取删除图标的高度 int height = rect.height(); int y = (int) event.getY(); //计算图标底部到控件底部的距离 int distance = (getHeight() - height) /2; //判断触摸点是否在竖直范围内(可能会有点误差) //触摸点的纵坐标在distance到(distance 图标自身的高度)之内,则视为点中删除图标 boolean isInnerHeight = (y > distance) && (y < (distance height)); if(isInnerWidth && isInnerHeight) { this.setText(""); } } } return super.onTouchEvent(event); } @Override public void onFocusChange(View v, boolean hasFocus) { this.hasFoucs = hasFocus; if (hasFocus) { setClearIconVisible(getText().length() > 0); } else { setClearIconVisible(false); } } protected void setClearIconVisible(boolean visible) { Drawable right = visible ? mClearDrawable : null; setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], right, getCompoundDrawables()[3]); } @Override public void onTextChanged(CharSequence s, int start, int count, int after) { if(hasFoucs){ setClearIconVisible(s.length() > 0); } } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { } public void setShakeAnimation(){ this.setAnimation(shakeAnimation(5)); } public static Animation shakeAnimation(int counts){ Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0); translateAnimation.setInterpolator(new CycleInterpolator(counts)); translateAnimation.setDuration(1000); return translateAnimation; } }