自带clear图标效果的搜索栏，自带clear图标,闲的蛋疼，就随手写了个d

自带clear图标效果的搜索栏，自带clear图标,闲的蛋疼，就随手写了个d

闲的蛋疼，就随手写了个dota的android应用。这个component就是用在查询那边的

android平台应该都能用吧，我自己是在2.1环境下写的。

package studio.five.common.component;import android.content.Context;import android.graphics.drawable.Drawable;import android.text.Editable;import android.text.InputType;import android.text.TextUtils;import android.text.TextWatcher;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.widget.AutoCompleteTextView;/** * @author jlcoa * @date 2012-7-10 * @version $Revision$ */public class SearchTextView extends AutoCompleteTextView {    private Drawable[] compoundDrawables;    private Drawable clearDrawable;    private int clearDrawableWidth;    /**     * @param context     * @param attrs     */    public SearchTextView(Context context, AttributeSet attrs) {        super(context, attrs);        compoundDrawables = this.getCompoundDrawables();        clearDrawable = compoundDrawables[2];        clearDrawableWidth = clearDrawable.getBounds().width() + this.getPaddingRight() + this.getCompoundDrawablePadding();        this.displayClearDrawable(false);        this.addTextChangedListener(new DisplayClearDrawableListener(this));        this.setOnTouchListener(new ClickClearDrawableListener(this));    }    private void displayClearDrawable(boolean show) {        this.setCompoundDrawablesWithIntrinsicBounds(compoundDrawables[0], compoundDrawables[1], show ? compoundDrawables[2] : null,                compoundDrawables[3]);    }    public static class DisplayClearDrawableListener implements TextWatcher {        private final SearchTextView txt;        DisplayClearDrawableListener(final SearchTextView txt) {            this.txt = txt;        }        @Override        public void beforeTextChanged(CharSequence s, int start, int count, int after) {            // TODO Auto-generated method stub        }        @Override        public void onTextChanged(CharSequence s, int start, int before, int count) {            // TODO Auto-generated method stub        }        @Override        public void afterTextChanged(Editable s) {            if (txt.getText().length() > 0) {                txt.displayClearDrawable(true);            } else {                txt.displayClearDrawable(false);            }        }    }    public static class ClickClearDrawableListener implements OnTouchListener {        private final SearchTextView txt;        ClickClearDrawableListener(final SearchTextView txt) {            this.txt = txt;        }        @Override        public boolean onTouch(View v, MotionEvent event) {            switch (event.getAction()) {            case MotionEvent.ACTION_UP:                int curX = (int) event.getX();                if (curX > v.getWidth() - txt.clearDrawableWidth && !TextUtils.isEmpty(txt.getText())) {                    txt.setText("");                    int cacheInputType = txt.getInputType();// backup  the input type                    txt.setInputType(InputType.TYPE_NULL);// disable soft input                    txt.onTouchEvent(event);// call native handler                    txt.setInputType(cacheInputType);// restore input  type                    // InputMethodManager imm = (InputMethodManager) v.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);                    // txt.requestFocus();                    // imm.showSoftInput(txt, 0);                    return false; // let txt focus still                }                break;            }            return false;        }    }}//该片段来自于http://byrx.net