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
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。
其他回答
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
我创建了一个简单的自定义触摸侦听器类，而不是自定义EditText
public class MyTouchListener implements View.OnTouchListener {
private EditText editText;
public MyTouchListener(EditText editText) {
this.editText = editText;
setupDrawable(this.editText);
}
private void setupDrawable(final EditText editText) {
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if(s.length()>0)
editText.setCompoundDrawablesWithIntrinsicBounds(0,0, R.drawable.clearicon,0);
else
editText.setCompoundDrawablesWithIntrinsicBounds(0,0, 0,0);
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_UP) {
if(editText.getCompoundDrawables()[2]!=null){
if(event.getX() >= (editText.getRight()- editText.getLeft() - editText.getCompoundDrawables()[2].getBounds().width())) {
editText.setText("");
}
}
}
return false;
}
}
当EditText为空白时，将没有可绘制对象。绘图将显示我们开始编辑以清除EditText的时间。
你可以设置触摸监听器
mEditText.setOnTouchListener（new MyTouchListener（mEditText））;
按照下面的代码绘制右，左，上，下点击:
edittextview_confirmpassword.setOnTouchListener(new View.OnTouchListener() {
@Override public boolean onTouch(View v, MotionEvent event) {
final int DRAWABLE_LEFT = 0;
final int DRAWABLE_TOP = 1;
final int DRAWABLE_RIGHT = 2;
final int DRAWABLE_BOTTOM = 3;
if(event.getAction() == MotionEvent.ACTION_UP) {
if(event.getRawX() >= (edittextview_confirmpassword.getRight() - edittextview_confirmpassword.getCompoundDrawables()[DRAWABLE_RIGHT].getBounds().width())) {
// your action here edittextview_confirmpassword.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
return true;
}
}else{
edittextview_confirmpassword.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
}
return false;
}
});
}
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>
