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
我见过几个解决方案，但没有一个能说服我。要么非常复杂，要么太简单(不可重用)。
这是我目前最喜欢的方法:
mEditText.setOnTouchListener(
new OnEditTextRightDrawableTouchListener(mEditText) {
@Override
public void OnDrawableClick() {
// The right drawable was clicked. Your action goes here.
}
});
这是可重复使用的触摸监听器:
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.EditText;
public abstract class OnEditTextRightDrawableTouchListener implements OnTouchListener {
private final EditText mEditText;
public OnEditTextRightDrawableTouchListener(@NonNull final EditText editText) {
mEditText = editText;
}
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
final int DRAWABLE_RIGHT_POSITION = 2;
final Drawable drawable = mEditText.getCompoundDrawables()[DRAWABLE_RIGHT_POSITION];
if (drawable != null) {
final float touchEventX = motionEvent.getX();
final int touchAreaRight = mEditText.getRight();
final int touchAreaLeft = touchAreaRight - drawable.getBounds().width();
if (touchEventX >= touchAreaLeft && touchEventX <= touchAreaRight) {
view.performClick();
OnDrawableClick();
}
return true;
}
}
return false;
}
public abstract void OnDrawableClick();
}
你可以在这里看到要点。
其他回答
That last contribution's use of contains(x,y) won't work directly on the result of getBounds() (except, by coincidence, when using "left" drawables). The getBounds method only provides the Rect defining points of the drawable item normalized with origin at 0,0 - so, you actually need to do the math of the original post to find out if the click is in the area of the drawable in the context of the containing EditText's dimensions, but change it for top, right, left etc. Alternatively you could describe a Rect that has coordinates actually relative to its position in the EditText container and use contains(), although in the end you're doing the same math.
将它们结合在一起就可以得到一个相当完整的解决方案，我只添加了一个实例属性consumesEvent，它让API用户决定是否应该通过使用其结果设置ACTION_CANCEL来传递单击事件。
此外，我不明白为什么边界和actionX, actionony值是实例属性，而不仅仅是堆栈上的本地属性。
下面是我在上面的基础上制作的实现的剪接图。它修复了正确使用事件需要返回false的问题。它增加了一个“模糊”因素。在我使用EditText字段中的Voice控件图标的用例中，我发现很难单击，因此模糊增加了被认为是单击可绘制对象的有效边界。对我来说，15个很好。我只需要drawableRight，所以我没有把数学插入其他的，以节省一些空间，但你明白这个想法。
package com.example.android;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.EditText;
import android.graphics.Rect;
import com.example.android.DrawableClickListener;
public class ClickableButtonEditText extends EditText {
public static final String LOG_TAG = "ClickableButtonEditText";
private Drawable drawableRight;
private Drawable drawableLeft;
private Drawable drawableTop;
private Drawable drawableBottom;
private boolean consumeEvent = false;
private int fuzz = 0;
private DrawableClickListener clickListener;
public ClickableButtonEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public ClickableButtonEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ClickableButtonEditText(Context context) {
super(context);
}
public void consumeEvent() {
this.setConsumeEvent(true);
}
public void setConsumeEvent(boolean b) {
this.consumeEvent = b;
}
public void setFuzz(int z) {
this.fuzz = z;
}
public int getFuzz() {
return fuzz;
}
@Override
public void setCompoundDrawables(Drawable left, Drawable top, Drawable right, Drawable bottom) {
if (right != null) {
drawableRight = right;
}
if (left != null) {
drawableLeft = left;
}
super.setCompoundDrawables(left, top, right, bottom);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
int x, y;
Rect bounds;
x = (int) event.getX();
y = (int) event.getY();
// this works for left since container shares 0,0 origin with bounds
if (drawableLeft != null) {
bounds = drawableLeft.getBounds();
if (bounds.contains(x - fuzz, y - fuzz)) {
clickListener.onClick(DrawableClickListener.DrawablePosition.LEFT);
if (consumeEvent) {
event.setAction(MotionEvent.ACTION_CANCEL);
return false;
}
}
} else if (drawableRight != null) {
bounds = drawableRight.getBounds();
if (x >= (this.getRight() - bounds.width() - fuzz) && x <= (this.getRight() - this.getPaddingRight() + fuzz)
&& y >= (this.getPaddingTop() - fuzz) && y <= (this.getHeight() - this.getPaddingBottom()) + fuzz) {
clickListener.onClick(DrawableClickListener.DrawablePosition.RIGHT);
if (consumeEvent) {
event.setAction(MotionEvent.ACTION_CANCEL);
return false;
}
}
} else if (drawableTop != null) {
// not impl reader exercise :)
} else if (drawableBottom != null) {
// not impl reader exercise :)
}
}
return super.onTouchEvent(event);
}
@Override
protected void finalize() throws Throwable {
drawableRight = null;
drawableBottom = null;
drawableLeft = null;
drawableTop = null;
super.finalize();
}
public void setDrawableClickListener(DrawableClickListener listener) {
this.clickListener = listener;
}
}
我认为如果我们使用一些技巧会容易得多:)
用图标创建一个图像按钮，并设置其背景 颜色要透明。 将图像按钮放在EditText和右边 实现按钮的onclick侦听器来执行您的 函数
Done
我见过几个解决方案，但没有一个能说服我。要么非常复杂，要么太简单(不可重用)。
这是我目前最喜欢的方法:
mEditText.setOnTouchListener(
new OnEditTextRightDrawableTouchListener(mEditText) {
@Override
public void OnDrawableClick() {
// The right drawable was clicked. Your action goes here.
}
});
这是可重复使用的触摸监听器:
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.EditText;
public abstract class OnEditTextRightDrawableTouchListener implements OnTouchListener {
private final EditText mEditText;
public OnEditTextRightDrawableTouchListener(@NonNull final EditText editText) {
mEditText = editText;
}
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
final int DRAWABLE_RIGHT_POSITION = 2;
final Drawable drawable = mEditText.getCompoundDrawables()[DRAWABLE_RIGHT_POSITION];
if (drawable != null) {
final float touchEventX = motionEvent.getX();
final int touchAreaRight = mEditText.getRight();
final int touchAreaLeft = touchAreaRight - drawable.getBounds().width();
if (touchEventX >= touchAreaLeft && touchEventX <= touchAreaRight) {
view.performClick();
OnDrawableClick();
}
return true;
}
}
return false;
}
public abstract void OnDrawableClick();
}
你可以在这里看到要点。
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。
我是这样做的
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TextInputLayout
android:id="@+id/til_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:textColorHint="@color/colorSilver">
<android.support.design.widget.TextInputEditText
android:id="@+id/tiet_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="top|left"
android:hint="@string/rep_hint"
android:inputType="textMultiLine"
android:maxLines="3"
android:drawableEnd="@drawable/ic_attach_photo"
android:drawablePadding="5dp"
android:textColor="@color/colorPrimaryText"
android:textColorHint="@color/colorSilver"
/>
</android.support.design.widget.TextInputLayout>
<View
android:id="@+id/right_button"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_centerVertical="true"
android:layout_alignParentEnd="true"
android:layout_marginEnd="12dp"
android:background="@color/clear" />
</RelativeLayout>
