Android EditText 自定义带删除按钮

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() {
// 获取EditText的DrawableRight,假如没有设置我们就使用默认的图片
mClearDrawable = getCompoundDrawables()[2];
if (mClearDrawable == null) {
mClearDrawable = getResources().getDrawable(
R.drawable.nickname_delete);
}
mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(),
mClearDrawable.getIntrinsicHeight());
setClearIconVisible(false);
setOnFocusChangeListener(this);
addTextChangedListener(this);
}

/**
* 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件 当我们按下的位置 在 EditText的宽度 -
* 图标到控件右边的间距 - 图标的宽度 和 EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向就没有考虑
*/
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouchEvent(MotionEvent event) {
int action = event.getAction();
//监听手指的按下、滑动、抬起来达到图片的点击，按住效果
switch (action) {
case MotionEvent.ACTION_DOWN:
if (getCompoundDrawables()[2] != null && getText().length() > 0) {
boolean touchable = event.getX() > (getWidth() - getTotalPaddingRight())
&& (event.getX() < ((getWidth() - getPaddingRight())));
if (touchable) {
setIconChange(R.drawable.nickname_delete2);
}
}
break;
case MotionEvent.ACTION_MOVE:

if (getCompoundDrawables()[2] != null && getText().length() > 0) {
boolean touchable = (event.getX() > (getWidth() - getTotalPaddingRight()) && (event
.getX() < ((getWidth() - getPaddingRight()))))
&& (event.getY() > 0 && event.getY() < getHeight() + 100);

if (touchable) {
setIconChange(R.drawable.nickname_delete2);
} else {
setIconChange(R.drawable.nickname_delete);
}
}

break;
case MotionEvent.ACTION_UP:
if (getCompoundDrawables()[2] != null && getText().length() > 0) {
setIconChange(R.drawable.nickname_delete);
boolean touchable = event.getX() > (getWidth() - getTotalPaddingRight())
&& (event.getX() < ((getWidth() - getPaddingRight())))
&& (event.getY() > 0 && event.getY() < getHeight());

if (touchable) {
this.setText("");
}
}
break;
}

return super.onTouchEvent(event);
}

/**
* 当ClearEditText焦点发生变化的时候，判断里面字符串长度设置清除图标的显示与隐藏
*/
@Override
public void onFocusChange(View v, boolean hasFocus) {
this.hasFoucs = hasFocus;
if (hasFocus) {
setClearIconVisible(getText().length() > 0);
} else {
setClearIconVisible(false);
}
}

/**
* 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
*
* @param visible
*/
protected void setClearIconVisible(boolean visible) {
Drawable right = visible ? mClearDrawable : null;
setCompoundDrawables(getCompoundDrawables()[0],
getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
}

/**
* 设置清除图标的点击效果变化
*/
private void setIconChange(int res) {
mClearDrawable = getResources().getDrawable(res);

mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(),
mClearDrawable.getIntrinsicHeight());
setCompoundDrawables(getCompoundDrawables()[0],
getCompoundDrawables()[1], mClearDrawable,
getCompoundDrawables()[3]);

}

/**
* 当输入框里面内容发生变化的时候回调的方法TextWatcher
*/
@Override
public void onTextChanged(CharSequence s, int start, int count, int after) {
if (hasFoucs) {
//当edittext里面有内容时显示删除图标
setClearIconVisible(s.length() > 0);
}
}

@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {

}

@Override
public void afterTextChanged(Editable s) {

}

}

<控件所在包路径.ClearEditText
android:id="@+id/clear_et"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="11"
android:hint="请输入您的手机号"
android:inputType="numberDecimal"
android:maxEms="11"
android:maxLength="11"
android:paddingBottom="12dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="12dp"
android:singleLine="true"
android:text=""
android:textColor="#000000"
android:textColorHint="#bbbbbb"
android:textSize="16sp" />