实现带清除效果的EditText

package sun.com.myhandler; import android.content.Context; import android.graphics.drawable.Drawable; import android.support.v7.widget.AppCompatEditText; import android.text.Editable; import android.text.TextWatcher; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.animation.Animation; import android.view.animation.CycleInterpolator; import android.view.animation.TranslateAnimation; /** * 描述:实现带清除效果的EditText * <p> * Created by vctor2015 on 2017/3/9. */ public class ClearEditText extends AppCompatEditText implements View.OnFocusChangeListener, TextWatcher { /** * 删除按钮的引用 */ private Drawable mClearDrawable; private boolean hasFocus; 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 defStyleAttr) { super(context, attrs, defStyleAttr); 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,2是获得右边的图片 顺序是左上右下（0,1,2,3,） mClearDrawable = getCompoundDrawables()[2]; if (mClearDrawable == null) { mClearDrawable = getResources().getDrawable(R.drawable.ic_set_icon_6); } mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight()); setClearIconVisible(false); setOnFocusChangeListener(this); addTextChangedListener(this); } @Override public boolean onTouchEvent(MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_UP) { if (getCompoundDrawables()[2] != null) { boolean touchable = event.getX() > (getWidth() - getTotalPaddingRight()) && event.getX() < (getWidth() - getPaddingRight()); if (touchable) { this.setText(""); } } } return super.onTouchEvent(event); } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } /** * 当输入框里面内容发生变化的时候回调的方法 */ @Override public void onTextChanged(CharSequence s, int start, int before, int count) { if (hasFocus) { setClearIconVisible(s.length() > 0); } } @Override public void afterTextChanged(Editable s) { } /** * 设置晃动动画 */ public void setShakeAnimation() { this.setAnimation(setShakeAnimation(10)); } /** * 晃动动画 * * @param counts 1秒钟晃动多少下 * @return */ private Animation setShakeAnimation(int counts) { Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0); //设置一个循环加速器，使用传入的次数就会出现摆动的效果。 translateAnimation.setInterpolator(new CycleInterpolator(counts)); translateAnimation.setDuration(500); return translateAnimation; } /** * 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.hasFocus = 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]); } }