我已经在EditText小部件中添加了文本右侧的图像，使用以下XML:
<EditText
android:id="@+id/txtsearch"
...
android:layout_gravity="center_vertical"
android:background="@layout/shape"
android:hint="Enter place,city,state"
android:drawableRight="@drawable/cross" />
但我想在单击嵌入图像时清除EditText。我该怎么做呢?
当前回答
使用可扩展的textview缓冲区可能是一个解决方案。看看这个简短而切中要害的教程:首先，点击事件要容易得多
https://android-designing.blogspot.com/2017/01/spannable-textview-with-image-clickable.html?m=1
其他回答
这是我的简单解决方案，只是把ImageButton放在EditText上:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText android:id="@+id/editTextName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:imeOptions="actionSearch"
android:inputType="text"/>
<ImageButton android:id="@+id/imageViewSearch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_action_search"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"/>
</RelativeLayout>
分享我的处理TextView复合可绘制的点击和触摸事件的通用解决方案。
首先，我们需要一个触摸事件处理程序:
/**
* Handles compound drawable touch events.
* Will intercept every event that happened inside (calculated) compound drawable bounds, extended by fuzz.
* @see TextView#getCompoundDrawables()
* @see TextView#setCompoundDrawablesRelativeWithIntrinsicBounds(int, int, int, int)
*/
public abstract class CompoundDrawableTouchListener implements View.OnTouchListener {
private final String LOG_TAG = "CmpDrawableTouch";
private final int fuzz;
public static final int LEFT = 0;
public static final int TOP = 1;
public static final int RIGHT = 2;
public static final int BOTTOM = 3;
private static final int[] DRAWABLE_INDEXES = {LEFT, TOP, RIGHT, BOTTOM};
/**
* Default constructor
*/
public CompoundDrawableTouchListener() {
this(0);
}
/**
* Constructor with fuzz
* @param fuzz desired fuzz in px
*/
public CompoundDrawableTouchListener(int fuzz) {
this.fuzz = fuzz;
}
@Override
public boolean onTouch(View view, MotionEvent event) {
if (!(view instanceof TextView)) {
Log.e(LOG_TAG, "attached view is not instance of TextView");
return false;
}
TextView textView = (TextView) view;
Drawable[] drawables = textView.getCompoundDrawables();
int x = (int) event.getX();
int y = (int) event.getY();
for (int i : DRAWABLE_INDEXES) {
if (drawables[i] == null) continue;
Rect bounds = getRelativeBounds(i, drawables[i], textView);
Rect fuzzedBounds = addFuzz(bounds);
if (fuzzedBounds.contains(x, y)) {
MotionEvent relativeEvent = MotionEvent.obtain(
event.getDownTime(),
event.getEventTime(),
event.getAction(),
event.getX() - bounds.left,
event.getY() - bounds.top,
event.getMetaState());
return onDrawableTouch(view, i, bounds, relativeEvent);
}
}
return false;
}
/**
* Calculates compound drawable bounds relative to wrapping view
* @param index compound drawable index
* @param drawable the drawable
* @param view wrapping view
* @return {@link Rect} with relative bounds
*/
private Rect getRelativeBounds(int index, @NonNull Drawable drawable, View view) {
Rect drawableBounds = drawable.getBounds();
Rect bounds = new Rect();
switch (index) {
case LEFT:
bounds.offsetTo(view.getPaddingLeft(),
view.getHeight() / 2 - bounds.height() / 2);
break;
case TOP:
bounds.offsetTo(view.getWidth() / 2 - bounds.width() / 2,
view.getPaddingTop());
break;
case RIGHT:
bounds.offsetTo(view.getWidth() - view.getPaddingRight() - bounds.width(),
view.getHeight() / 2 - bounds.height() / 2);
break;
case BOTTOM:
bounds.offsetTo(view.getWidth() / 2 - bounds.width() / 2,
view.getHeight() - view.getPaddingBottom() - bounds.height());
break;
}
return bounds;
}
/**
* Expands {@link Rect} by given value in every direction relative to its center
* @param source given {@link Rect}
* @return result {@link Rect}
*/
private Rect addFuzz(Rect source) {
Rect result = new Rect();
result.left = source.left - fuzz;
result.right = source.right + fuzz;
result.top = source.top - fuzz;
result.bottom = source.bottom + fuzz;
return result;
}
/**
* Compound drawable touch-event handler
* @param v wrapping view
* @param drawableIndex index of compound drawable which recicved the event
* @param drawableBounds {@link Rect} with compound drawable bounds relative to wrapping view.
* Fuzz not included
* @param event event with coordinated relative to wrapping view - i.e. within {@code drawableBounds}.
* If using fuzz, may return negative coordinates.
*/
protected abstract boolean onDrawableTouch(View v, int drawableIndex, Rect drawableBounds, MotionEvent event);
}
现在你可以处理任何触摸事件任何复合drawable的任何TextView你喜欢这样:
textView1.setOnTouchListener(new CompoundDrawableTouchListener() {
@Override
protected void onDrawableTouch(View v, int drawableIndex, Rect drawableBounds, MotionEvent event) {
switch(v.getId()) {
case R.id.textView1:
switch(drawableIndex) {
case CompoundDrawableTouchListener.RIGHT:
doStuff();
break;
}
break;
}
}
});
只对点击感兴趣?只需通过MotionEvent动作过滤:
/**
* Handles compound drawable click events.
* @see TextView#getCompoundDrawables()
* @see TextView#setCompoundDrawablesRelativeWithIntrinsicBounds(int, int, int, int)
* @see CompoundDrawableTouchListener
*/
public abstract class CompoundDrawableClickListener extends CompoundDrawableTouchListener {
/**
* Default constructor
*/
public CompoundDrawableClickListener() {
super();
}
/**
* Constructor with fuzz
* @param fuzz desired fuzz in px
*/
public CompoundDrawableClickListener(int fuzz) {
super(fuzz);
}
@Override
protected void onDrawableTouch(View v, int drawableIndex, Rect drawableBounds, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) onDrawableClick(v, drawableIndex);
return true;
}
/**
* Compound drawable touch-event handler
* @param v wrapping view
* @param drawableIndex index of compound drawable which recicved the event
*/
protected abstract void onDrawableClick(View v, int drawableIndex);
}
同样，我们可以很容易地处理点击任何复合drawable的任何TextView:
textView1.setOnTouchListener(new CompoundDrawableClickListener() {
@Override
protected void onDrawableClick(View v, int drawableIndex) {
switch(v.getId()) {
case R.id.textView1:
switch(drawableIndex) {
case CompoundDrawableTouchListener.RIGHT:
doStuff();
break;
}
break;
}
}
});
希望你和我一样喜欢。如果有任何变化，我会尽量在这里和相关的要点上保持更新。
使用可扩展的textview缓冲区可能是一个解决方案。看看这个简短而切中要害的教程:首先，点击事件要容易得多
https://android-designing.blogspot.com/2017/01/spannable-textview-with-image-clickable.html?m=1
非常非常好，感谢所有参与讨论的人。因此，如果你不想处理扩展类带来的不便，你可以执行以下操作(仅为正确的可绘制对象实现)
this.keyword = (AutoCompleteTextView) findViewById(R.id.search);
this.keyword.setOnTouchListener(new RightDrawableOnTouchListener(keyword) {
@Override
public boolean onDrawableTouch(final MotionEvent event) {
return onClickSearch(keyword,event);
}
});
private boolean onClickSearch(final View view, MotionEvent event) {
// do something
event.setAction(MotionEvent.ACTION_CANCEL);
return false;
}
下面是基于@Mark的回答的基本侦听器实现
public abstract class RightDrawableOnTouchListener implements OnTouchListener {
Drawable drawable;
private int fuzz = 10;
/**
* @param keyword
*/
public RightDrawableOnTouchListener(TextView view) {
super();
final Drawable[] drawables = view.getCompoundDrawables();
if (drawables != null && drawables.length == 4)
this.drawable = drawables[2];
}
/*
* (non-Javadoc)
*
* @see android.view.View.OnTouchListener#onTouch(android.view.View, android.view.MotionEvent)
*/
@Override
public boolean onTouch(final View v, final MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN && drawable != null) {
final int x = (int) event.getX();
final int y = (int) event.getY();
final Rect bounds = drawable.getBounds();
if (x >= (v.getRight() - bounds.width() - fuzz) && x <= (v.getRight() - v.getPaddingRight() + fuzz)
&& y >= (v.getPaddingTop() - fuzz) && y <= (v.getHeight() - v.getPaddingBottom()) + fuzz) {
return onDrawableTouch(event);
}
}
return false;
}
public abstract boolean onDrawableTouch(final MotionEvent event);
}
上述问题的一个可能的解决方案是使用android的新材质组件TextInputLayout。
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/searchInput"
style="@style/Widget.App.TextInputLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/search"
app:endIconMode="custom"
app:endIconContentDescription="Search"
app:endIconDrawable="@drawable/ic_search">
<EditText
android:id="@+id/et_search"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</com.google.android.material.textfield.TextInputLayout>
在这里设置TextInputLayout属性endIconMode时，将一个按钮放置在所包含的EditText的末尾。
另外app:endIconMode = "custom"允许自定义图标的点击功能
最后，为了监听结束图标单击，调用外围TextInputLayout组件上的setEndIconClickListener()。
