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>
其他回答
我已经采取了@AZ_的解决方案，并将其转换为kotlin扩展函数:
所以在代码中复制这个:
@SuppressLint("ClickableViewAccessibility")
fun EditText.setDrawableRightTouch(setClickListener: () -> Unit) {
this.setOnTouchListener(View.OnTouchListener { _, event ->
val DRAWABLE_LEFT = 0
val DRAWABLE_TOP = 1
val DRAWABLE_RIGHT = 2
val DRAWABLE_BOTTOM = 3
if (event.action == MotionEvent.ACTION_UP) {
if (event.rawX >= this.right - this.compoundDrawables[DRAWABLE_RIGHT].bounds.width()
) {
setClickListener()
return@OnTouchListener true
}
}
false
})
}
你可以在EditText上调用setDrawableRightTouch函数来使用它:
yourEditText.setDrawableRightTouch {
//your code
}
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;
}
}
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp" >
<EditText
android:id="@+id/edt_status_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:background="@drawable/txt_box_blank"
android:ems="10"
android:hint="@string/statusnote"
android:paddingLeft="5dp"
android:paddingRight="10dp"
android:textColor="@android:color/black" />
<Button
android:id="@+id/note_del"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginRight="1dp"
android:layout_marginTop="5dp"
android:background="@android:drawable/ic_delete" />
</FrameLayout>
对于任何不想实现可怕的点击处理的人。你可以用RelativeLayout实现同样的效果。有了它，你甚至可以自由处理可绘制对象的定位。
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</android.support.design.widget.TextInputLayout>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerInParent="true"
android:src="@drawable/ic_undo"/>
</RelativeLayout>
ImageView的位置将与你使用drawableEnd相同-加上你不需要所有的触摸监听器处理。只需要点击ImageView的监听器就可以了。
我使用了一个简短的解决方案，甚至适用于对话的片段。
//The listener of a drawableEnd button for clear a TextInputEditText
textValue.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_UP) {
final TextView textView = (TextView)v;
if(event.getX() >= textView.getWidth() - textView.getCompoundPaddingEnd()) {
textView.setText(""); //Clear a view, example: EditText or TextView
return true;
}
}
return false;
}
});
