github地址：
https://github.com/153437803/EditClearText
public class EditClearText extends AppCompatEditText implements View.OnFocusChangeListener, TextWatcher {
// 左侧提图片资源ID（仅仅是个图标，没有实际意义）
private int leftIcon;
// 左侧删除图片（宽度）
private float leftIconWidth;
// 左侧删除图片（高度）
private float leftIconHeight;
// 左侧删除图片
private Drawable leftDrawable;
// 右侧删除图片资源ID（默认状态，获取焦点，内容不为空时，显示图片）
private int rightIcon;
// 右侧删除图片资源ID（按下状态）
private int rightIconPressed;
// 右侧删除图片（默认状态，按下状态）
private Drawable rightDrawable;
// 右侧删除图片（宽度）
private float rightIconWidth;
// 右侧删除图片（高度）
private float rightIconHeight;
// 背景颜色
private int backgroundColor;
// 背景圆角
private float backgroundCorners;
// 背景边框颜色
private int backgroundStoreColor;
// 背景边框宽度
private float backgroundStoreSize;
// 空字符串
private final String NULL = "";
public EditClearText(Context context) {
this(context, null);
}
public EditClearText(Context context, AttributeSet attrs) {
this(context, attrs, android.R.attr.editTextStyle);
}
public EditClearText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// 单行输入
setSingleLine();
TypedArray typedArray = null;
try {
final float scale = context.getResources().getDisplayMetrics().density;
float defaultIconSize = 20 * scale + 0.5f;
//获取自定义属性。
typedArray = context.obtainStyledAttributes(attrs, R.styleable.EditClearText, defStyleAttr, 0);
leftIcon = typedArray.getResourceId(R.styleable.EditClearText_ect_icon_left, -1);
leftIconWidth = typedArray.getDimension(R.styleable.EditClearText_ect_icon_left_width, defaultIconSize);
leftIconHeight = typedArray.getDimension(R.styleable.EditClearText_ect_icon_left_height, defaultIconSize);
//左边按钮的大小dp
rightIconWidth = typedArray.getDimension(R.styleable.EditClearText_ect_icon_right_width, defaultIconSize);
rightIconHeight = typedArray.getDimension(R.styleable.EditClearText_ect_icon_right_height, defaultIconSize);
// 删除按钮
rightIcon = typedArray.getResourceId(R.styleable.EditClearText_ect_icon_right, -1);
rightIconPressed = typedArray.getResourceId(R.styleable.EditClearText_ect_icon_right_pressed, -1);
// 背景颜色
backgroundColor = typedArray.getColor(R.styleable.EditClearText_ect_background_color, Color.TRANSPARENT);
// 背景边框颜色
backgroundStoreColor = typedArray.getColor(R.styleable.EditClearText_ect_background_store_color, Color.TRANSPARENT);
// 背景圆角
backgroundCorners = typedArray.getDimension(R.styleable.EditClearText_ect_background_corners, 0);
// 背景边框宽度
backgroundStoreSize = typedArray.getDimension(R.styleable.EditClearText_ect_background_store_size, 0);
} catch (Exception e) {
} finally {
if (null != typedArray) {
typedArray.recycle();
}
}
// 设置对其方式:center_vertical
// setGravity(Gravity.CENTER_VERTICAL);
//设置监听
this.setOnFocusChangeListener(this);
this.addTextChangedListener(this);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
if (leftIcon != -1) {
leftDrawable = getResources().getDrawable(leftIcon);
leftDrawable.setBounds(0, 0, (int) leftIconWidth, (int) leftIconHeight);
}
//右侧图标
if (rightIcon != -1) {
// 存在按下状态
if (rightIconPressed != -1) {
Drawable drawable1 = getResources().getDrawable(rightIcon);
Drawable drawable2 = getResources().getDrawable(rightIconPressed);
rightDrawable = new StateListDrawable();
((StateListDrawable) rightDrawable).addState(new int[]{-android.R.attr.state_pressed}, drawable1);
((StateListDrawable) rightDrawable).addState(new int[]{android.R.attr.state_pressed}, drawable2);
rightDrawable.setBounds(0, 0, (int) rightIconWidth, (int) rightIconHeight);
}
// 没有按压状态
else {
rightDrawable = getResources().getDrawable(rightIcon);
rightDrawable.setBounds(0, 0, (int) rightIconWidth, (int) rightIconHeight);
}
}
}
@Override
protected void onDraw(Canvas canvas) {
// 圆角矩形背景
GradientDrawable bg = new GradientDrawable();
bg.setCornerRadius(backgroundCorners);
bg.setColor(backgroundColor);
bg.setSize(getWidth(), getHeight());
bg.setStroke((int) backgroundStoreSize, backgroundStoreColor);
setBackgroundDrawable(bg);
super.onDraw(canvas);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
//可以获得上下左右四个drawable，右侧排第二。图标没有设置则为空。
Drawable rightIcon = getCompoundDrawables()[2];
if (rightIcon != null && event.getAction() == MotionEvent.ACTION_UP) {
//检查点击的位置是否是右侧的删除图标
//注意，使用getRwwX()是获取相对屏幕的位置，getX()可能获取相对父组件的位置
int leftEdgeOfRightDrawable = getRight() - getPaddingRight() - rightIcon.getBounds().width();
if (event.getRawX() >= leftEdgeOfRightDrawable) {
setText(NULL);
}
}
return super.onTouchEvent(event);
}
@Override
public void onFocusChange(View view, boolean b) {
if (length() > 0 && hasFocus()) {
setCompoundDrawables(leftDrawable, null, rightDrawable, null);
} else {
setCompoundDrawables(leftDrawable, null, null, null);
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
if (length() > 0 && hasFocus()) {
setCompoundDrawables(leftDrawable, null, rightDrawable, null);
} else {
setCompoundDrawables(leftDrawable, null, null, null);
}
}
@Override
public void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
super.onTextChanged(text, start, lengthBefore, lengthAfter);
}
@Override
protected void onDetachedFromWindow() {
// 移除监听
this.removeTextChangedListener(this);
this.addTextChangedListener(null);
this.setOnFocusChangeListener(null);
// 释放资源
rightDrawable = null;
leftDrawable = null;
super.onDetachedFromWindow();
}
@Override
protected void onVisibilityChanged(View changedView, int visibility) {
if (visibility != VISIBLE) {
// 移除监听
this.removeTextChangedListener(this);
this.addTextChangedListener(null);
this.setOnFocusChangeListener(null);
// 释放资源
rightDrawable = null;
leftDrawable = null;
}
super.onVisibilityChanged(changedView, visibility);
}
@Override
public void onFinishTemporaryDetach() {
// 移除监听
this.removeTextChangedListener(this);
this.addTextChangedListener(null);
this.setOnFocusChangeListener(null);
// 释放资源
rightDrawable = null;
leftDrawable = null;
super.onFinishTemporaryDetach();
}
}
