我正在一个购物项目中，我想在EditText中创建动态的结束图标，当用户专注于EditText时，该图标会发生变化。
因此，基本上，在用户与editText交互之前，该图标在右侧显示“搜索”图标，而当用户单击并输入一些信息时，该图标将显示“清除”图标。
我仅实现了可绘制对象的可见功能。
edtSearch.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean b)
{
if(b){
edtSearch.setCompoundDrawablesWithIntrinsicBounds(0,0,0,0);
edtSearch.setCompoundDrawablesWithIntrinsicBounds(0,0,R.drawable.ic_cancel_black_24dp,0);
}
}
});
糟糕！如何处理搜索EditText的取消单击？
也许这可以帮助您
public class MyEditText extends EditText {
private Drawable drawableRight;
private Drawable drawableLeft;
private Drawable drawableTop;
private Drawable drawableBottom;
int actionX, actionY;
private DClickListener clickListener;
public MyEditText(Context context, AttributeSet attrs) {
super(context, attrs);
// this Contructure required when you are using this view in xml
}
public MyEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
}
@Override
public void setCompoundDrawables(Drawable left, Drawable top,
Drawable right, Drawable bottom) {
if (left != null) {
drawableLeft = left;
}
if (right != null) {
drawableRight = right;
}
if (top != null) {
drawableTop = top;
}
if (bottom != null) {
drawableBottom = bottom;
}
super.setCompoundDrawables(left, top, right, bottom);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
Rect bounds;
if (event.getAction() == MotionEvent.ACTION_DOWN) {
actionX = (int) event.getX();
actionY = (int) event.getY();
if (drawableBottom != null
&& drawableBottom.getBounds().contains(actionX, actionY)) {
clickListener.onClick(DrawablePosition.BOTTOM);
return super.onTouchEvent(event);
}
if (drawableTop != null
&& drawableTop.getBounds().contains(actionX, actionY)) {
clickListener.onClick(DrawablePosition.TOP);
return super.onTouchEvent(event);
}
// this works for left since container shares 0,0 origin with bounds
if (drawableLeft != null) {
bounds = null;
bounds = drawableLeft.getBounds();
int x, y;
int extraTapArea = (int) (13 * getResources().getDisplayMetrics().density + 0.5);
x = actionX;
y = actionY;
if (!bounds.contains(actionX, actionY)) {
/** Gives the +20 area for tapping. */
x = (int) (actionX - extraTapArea);
y = (int) (actionY - extraTapArea);
if (x <= 0)
x = actionX;
if (y <= 0)
y = actionY;
/** Creates square from the smallest value */
if (x < y) {
y = x;
}
}
if (bounds.contains(x, y) && clickListener != null) {
clickListener
.onClick(DClickListener.DrawablePosition.LEFT);
event.setAction(MotionEvent.ACTION_CANCEL);
return false;
}
}
if (drawableRight != null) {
bounds = null;
bounds = drawableRight.getBounds();
int x, y;
int extraTapArea = 13;
/**
* IF USER CLICKS JUST OUT SIDE THE RECTANGLE OF THE DRAWABLE
* THAN ADD X AND SUBTRACT THE Y WITH SOME VALUE SO THAT AFTER
* CALCULATING X AND Y CO-ORDINATE LIES INTO THE DRAWBABLE
* BOUND. - this process help to increase the tappable area of
* the rectangle.
*/
x = (int) (actionX + extraTapArea);
y = (int) (actionY - extraTapArea);
/**Since this is right drawable subtract the value of x from the width
* of view. so that width - tappedarea will result in x co-ordinate in drawable bound.
*/
x = getWidth() - x;
/*x can be negative if user taps at x co-ordinate just near the width.
* e.g views width = 300 and user taps 290. Then as per previous calculation
* 290 + 13 = 303. So subtract X from getWidth() will result in negative value.
* So to avoid this add the value previous added when x goes negative.
*/
if(x <= 0){
x += extraTapArea;
}
/* If result after calculating for extra tappable area is negative.
* assign the original value so that after subtracting
* extratapping area value doesn't go into negative value.
*/
if (y <= 0)
y = actionY;
/**If drawble bounds contains the x and y points then move ahead.*/
if (bounds.contains(x, y) && clickListener != null) {
clickListener
.onClick(DClickListener.DrawablePosition.RIGHT);
event.setAction(MotionEvent.ACTION_CANCEL);
return false;
}
return super.onTouchEvent(event);
}
}
return super.onTouchEvent(event);
}
@Override
protected void finalize() throws Throwable {
drawableRight = null;
drawableBottom = null;
drawableLeft = null;
drawableTop = null;
super.finalize();
}
public void setDrawableClickListener(DListener listener) {
this.clickListener = listener;
}
}
public interface DClickListener {
public static enum DrawableSide { TOP, BOTTOM, LEFT, RIGHT };
public void onClick(DrawableSide target);
}
在活动中，您可以添加以下代码，其中edtSearch是MyEditText对象
edtSearch.setDrawableClickListener(new DClickListener() {
public void onClick(DrawableSide target) {
switch (target) {
case LEFT:
//Do something here
break;
default:
break;
}
}
});
使用这样的Xml
<yourPackageName.MyEditText
android:id="@+id/imgSearch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>