- public class ClearEditText extends EditText implements
- OnFocusChangeListener, TextWatcher {
- /**
- * 刪除按鈕的引用
- */
- private Drawable mClearDrawable;
- /**
- * 控件是否有焦點
- */
- private boolean hasFoucs;
- public ClearEditText(Context context) {
- this(context, null);
- }
- public ClearEditText(Context context, AttributeSet attrs) {
- //這裏構造方法也很重要,不加這個很多屬性不能再XML裏面定義
- this(context, attrs, android.R.attr.editTextStyle);
- }
- public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
- super(context, attrs, defStyle);
- init();
- }
- private void init() {
- //獲取EditText的DrawableRight,假如沒有設置我們就使用默認的圖片
- mClearDrawable = getCompoundDrawables()[2];
- if (mClearDrawable == null) {
- // throw new NullPointerException("You can add drawableRight attribute in XML");
- mClearDrawable = getResources().getDrawable(R.drawable.delete_selector);
- }
- mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight());
- //默認設置隱藏圖標
- setClearIconVisible(false);
- //設置焦點改變的監聽
- setOnFocusChangeListener(this);
- //設置輸入框裏面內容發生改變的監聽
- addTextChangedListener(this);
- }
- /**
- * 因爲我們不能直接給EditText設置點擊事件,所以我們用記住我們按下的位置來模擬點擊事件
- * 當我們按下的位置 在 EditText的寬度 - 圖標到控件右邊的間距 - 圖標的寬度 和
- * EditText的寬度 - 圖標到控件右邊的間距之間我們就算點擊了圖標,豎直方向就沒有考慮
- */
- @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);
- }
- /**
- * 當ClearEditText焦點發生變化的時候,判斷裏面字符串長度設置清除圖標的顯示與隱藏
- */
- @Override
- public void onFocusChange(View v, boolean hasFocus) {
- this.hasFoucs = hasFocus;
- if (hasFocus) {
- setClearIconVisible(getText().length() > 0);
- } else {
- setClearIconVisible(false);
- }
- }
- /**
- * 設置清除圖標的顯示與隱藏,調用setCompoundDrawables爲EditText繪製上去
- * @param visible
- */
- protected void setClearIconVisible(boolean visible) {
- Drawable right = visible ? mClearDrawable : null;
- setCompoundDrawables(getCompoundDrawables()[0],
- getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
- }
- /**
- * 當輸入框裏面內容發生變化的時候回調的方法
- */
- @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) {
- }
- /**
- * 設置晃動動畫
- */
- public void setShakeAnimation(){
- this.setAnimation(shakeAnimation(5));
- }
- /**
- * 晃動動畫
- * @param counts 1秒鐘晃動多少下
- * @return
- */
- public static Animation shakeAnimation(int counts){
- Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
- translateAnimation.setInterpolator(new CycleInterpolator(counts));
- translateAnimation.setDuration(1000);
- return translateAnimation;
- }
- }
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/textView1"
android:layout_marginTop="26dp"
android:ems="10" >
<requestFocus />
</com.example.test.ClearEditText>