自带clear图标效果的搜索栏代码,Java代码库,德仔网

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【Java】自带clear图标效果的搜索栏
作者:IamFive / 发布于2012/7/23/ 683
自带clear图标效果的搜索栏
<div>/**
* @(#)SearchTextView.java 2012-7-10
* Copyright 2000-2012 by iampurse@vip.qq.com. All rights reserved.
*/
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;
}
}
}
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