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

Kotlin是一种很棒的语言,每个类都可以使用新方法进行扩展。让我们为EditText类介绍一个新方法,它将捕捉点击到右绘图。

fun EditText.onRightDrawableClicked(onClicked: (view: EditText) -> Unit) {
this.setOnTouchListener { v, event ->
    var hasConsumed = false
    if (v is EditText) {
        if (event.x >= v.width - v.totalPaddingRight) {
            if (event.action == MotionEvent.ACTION_UP) {
                onClicked(this)
            }
            hasConsumed = true
        }
    }
    hasConsumed
}
}

你可以看到它以回调函数作为参数,当用户单击右可绘制时调用。

val username = findViewById<EditText>(R.id.username_text)
    username.onRightDrawableClicked {
        it.text.clear()
    }

其他回答

我创建了一个有用的抽象类DrawableClickListener实现OnTouchListener。

除了DrawableClickListener类之外,我还创建了4个额外的抽象类,它们扩展了DrawableClickListener类,并处理对正确象限的可绘制区域的单击。

LeftDrawableClickListener TopDrawableClickListener RightDrawableClickListener BottomDrawableClickListener


考虑要点

需要考虑的一件事是,如果这样做,图像不会调整大小;因此,在放入res/drawable文件夹之前,图像必须正确缩放。

如果你定义一个LinearLayout包含一个ImageView和一个TextView,这是很容易操纵图像的大小显示。


activity_my.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/myTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="replace this with a variable"
        android:textSize="30sp"
        android:drawableLeft="@drawable/my_left_image"
        android:drawableRight="@drawable/my_right_image"
        android:drawablePadding="9dp" />

</RelativeLayout>

MyActivity.java

package com.company.project.core;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class MyActivity extends Activity
{

    @Override
    protected void onCreate( Bundle savedInstanceState )
    {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.activity_my );

        final TextView myTextView = (TextView) this.findViewById( R.id.myTextView );
        myTextView.setOnTouchListener( new DrawableClickListener.LeftDrawableClickListener(myTextView)
        {
            @Override
            public boolean onDrawableClick()
            {
                // TODO : insert code to perform on clicking of the LEFT drawable image...

                return true;
            }
        } );
        myTextView.setOnTouchListener( new DrawableClickListener.RightDrawableClickListener(myTextView)
        {
            @Override
            public boolean onDrawableClick()
            {
                // TODO : insert code to perform on clicking of the RIGHT drawable image...

                return true;
            }
        } );
    }

}

DrawableClickListener.java

package com.company.project.core;

import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.TextView;

/**
 * This class can be used to define a listener for a compound drawable.
 * 
 * @author Matthew Weiler
 * */
public abstract class DrawableClickListener implements OnTouchListener
{

    /* PUBLIC CONSTANTS */
    /**
     * This represents the left drawable.
     * */
    public static final int DRAWABLE_INDEX_LEFT = 0;
    /**
     * This represents the top drawable.
     * */
    public static final int DRAWABLE_INDEX_TOP = 1;
    /**
     * This represents the right drawable.
     * */
    public static final int DRAWABLE_INDEX_RIGHT = 2;
    /**
     * This represents the bottom drawable.
     * */
    public static final int DRAWABLE_INDEX_BOTTOM = 3;
    /**
     * This stores the default value to be used for the
     * {@link DrawableClickListener#fuzz}.
     * */
    public static final int DEFAULT_FUZZ = 10;

    /* PRIVATE VARIABLES */
    /**
     * This stores the number of pixels of &quot;fuzz&quot; that should be
     * included to account for the size of a finger.
     * */
    private final int fuzz;
    /**
     * This will store a reference to the {@link Drawable}.
     * */
    private Drawable drawable = null;

    /* CONSTRUCTORS */
    /**
     * This will create a new instance of a {@link DrawableClickListener}
     * object.
     * 
     * @param view
     *            The {@link TextView} that this {@link DrawableClickListener}
     *            is associated with.
     * @param drawableIndex
     *            The index of the drawable that this
     *            {@link DrawableClickListener} pertains to.
     *            <br />
     *            <i>use one of the values:
     *            <b>DrawableOnTouchListener.DRAWABLE_INDEX_*</b></i>
     */
    public DrawableClickListener( final TextView view, final int drawableIndex )
    {
        this( view, drawableIndex, DrawableClickListener.DEFAULT_FUZZ );
    }

    /**
     * This will create a new instance of a {@link DrawableClickListener}
     * object.
     * 
     * @param view
     *            The {@link TextView} that this {@link DrawableClickListener}
     *            is associated with.
     * @param drawableIndex
     *            The index of the drawable that this
     *            {@link DrawableClickListener} pertains to.
     *            <br />
     *            <i>use one of the values:
     *            <b>DrawableOnTouchListener.DRAWABLE_INDEX_*</b></i>
     * @param fuzzOverride
     *            The number of pixels of &quot;fuzz&quot; that should be
     *            included to account for the size of a finger.
     */
    public DrawableClickListener( final TextView view, final int drawableIndex, final int fuzz )
    {
        super();
        this.fuzz = fuzz;
        final Drawable[] drawables = view.getCompoundDrawables();
        if ( drawables != null && drawables.length == 4 )
        {
            this.drawable = drawables[drawableIndex];
        }
    }

    /* OVERRIDDEN PUBLIC METHODS */
    @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 ( this.isClickOnDrawable( x, y, v, bounds, this.fuzz ) )
            {
                return this.onDrawableClick();
            }
        }
        return false;
    }

    /* PUBLIC METHODS */
    /**
     * 
     * */
    public abstract boolean isClickOnDrawable( final int x, final int y, final View view, final Rect drawableBounds, final int fuzz );

    /**
     * This method will be fired when the drawable is touched/clicked.
     * 
     * @return
     *         <code>true</code> if the listener has consumed the event;
     *         <code>false</code> otherwise.
     * */
    public abstract boolean onDrawableClick();

    /* PUBLIC CLASSES */
    /**
     * This class can be used to define a listener for a <b>LEFT</b> compound
     * drawable.
     * */
    public static abstract class LeftDrawableClickListener extends DrawableClickListener
    {

        /* CONSTRUCTORS */
        /**
         * This will create a new instance of a
         * {@link LeftDrawableClickListener} object.
         * 
         * @param view
         *            The {@link TextView} that this
         *            {@link LeftDrawableClickListener} is associated with.
         */
        public LeftDrawableClickListener( final TextView view )
        {
            super( view, DrawableClickListener.DRAWABLE_INDEX_LEFT );
        }

        /**
         * This will create a new instance of a
         * {@link LeftDrawableClickListener} object.
         * 
         * @param view
         *            The {@link TextView} that this
         *            {@link LeftDrawableClickListener} is associated with.
         * @param fuzzOverride
         *            The number of pixels of &quot;fuzz&quot; that should be
         *            included to account for the size of a finger.
         */
        public LeftDrawableClickListener( final TextView view, final int fuzz )
        {
            super( view, DrawableClickListener.DRAWABLE_INDEX_LEFT, fuzz );
        }

        /* PUBLIC METHODS */
        public boolean isClickOnDrawable( final int x, final int y, final View view, final Rect drawableBounds, final int fuzz )
        {
            if ( x >= ( view.getPaddingLeft() - fuzz ) )
            {
                if ( x <= ( view.getPaddingLeft() + drawableBounds.width() + fuzz ) )
                {
                    if ( y >= ( view.getPaddingTop() - fuzz ) )
                    {
                        if ( y <= ( view.getHeight() - view.getPaddingBottom() + fuzz ) )
                        {
                            return true;
                        }
                    }
                }
            }
            return false;
        }

    }

    /**
     * This class can be used to define a listener for a <b>TOP</b> compound
     * drawable.
     * */
    public static abstract class TopDrawableClickListener extends DrawableClickListener
    {

        /* CONSTRUCTORS */
        /**
         * This will create a new instance of a {@link TopDrawableClickListener}
         * object.
         * 
         * @param view
         *            The {@link TextView} that this
         *            {@link TopDrawableClickListener} is associated with.
         */
        public TopDrawableClickListener( final TextView view )
        {
            super( view, DrawableClickListener.DRAWABLE_INDEX_TOP );
        }

        /**
         * This will create a new instance of a {@link TopDrawableClickListener}
         * object.
         * 
         * @param view
         *            The {@link TextView} that this
         *            {@link TopDrawableClickListener} is associated with.
         * @param fuzzOverride
         *            The number of pixels of &quot;fuzz&quot; that should be
         *            included to account for the size of a finger.
         */
        public TopDrawableClickListener( final TextView view, final int fuzz )
        {
            super( view, DrawableClickListener.DRAWABLE_INDEX_TOP, fuzz );
        }

        /* PUBLIC METHODS */
        public boolean isClickOnDrawable( final int x, final int y, final View view, final Rect drawableBounds, final int fuzz )
        {
            if ( x >= ( view.getPaddingLeft() - fuzz ) )
            {
                if ( x <= ( view.getWidth() - view.getPaddingRight() + fuzz ) )
                {
                    if ( y >= ( view.getPaddingTop() - fuzz ) )
                    {
                        if ( y <= ( view.getPaddingTop() + drawableBounds.height() + fuzz ) )
                        {
                            return true;
                        }
                    }
                }
            }
            return false;
        }

    }

    /**
     * This class can be used to define a listener for a <b>RIGHT</b> compound
     * drawable.
     * */
    public static abstract class RightDrawableClickListener extends DrawableClickListener
    {

        /* CONSTRUCTORS */
        /**
         * This will create a new instance of a
         * {@link RightDrawableClickListener} object.
         * 
         * @param view
         *            The {@link TextView} that this
         *            {@link RightDrawableClickListener} is associated with.
         */
        public RightDrawableClickListener( final TextView view )
        {
            super( view, DrawableClickListener.DRAWABLE_INDEX_RIGHT );
        }

        /**
         * This will create a new instance of a
         * {@link RightDrawableClickListener} object.
         * 
         * @param view
         *            The {@link TextView} that this
         *            {@link RightDrawableClickListener} is associated with.
         * @param fuzzOverride
         *            The number of pixels of &quot;fuzz&quot; that should be
         *            included to account for the size of a finger.
         */
        public RightDrawableClickListener( final TextView view, final int fuzz )
        {
            super( view, DrawableClickListener.DRAWABLE_INDEX_RIGHT, fuzz );
        }

        /* PUBLIC METHODS */
        public boolean isClickOnDrawable( final int x, final int y, final View view, final Rect drawableBounds, final int fuzz )
        {
            if ( x >= ( view.getWidth() - view.getPaddingRight() - drawableBounds.width() - fuzz ) )
            {
                if ( x <= ( view.getWidth() - view.getPaddingRight() + fuzz ) )
                {
                    if ( y >= ( view.getPaddingTop() - fuzz ) )
                    {
                        if ( y <= ( view.getHeight() - view.getPaddingBottom() + fuzz ) )
                        {
                            return true;
                        }
                    }
                }
            }
            return false;
        }

    }

    /**
     * This class can be used to define a listener for a <b>BOTTOM</b> compound
     * drawable.
     * */
    public static abstract class BottomDrawableClickListener extends DrawableClickListener
    {

        /* CONSTRUCTORS */
        /**
         * This will create a new instance of a
         * {@link BottomDrawableClickListener} object.
         * 
         * @param view
         *            The {@link TextView} that this
         *            {@link BottomDrawableClickListener} is associated with.
         */
        public BottomDrawableClickListener( final TextView view )
        {
            super( view, DrawableClickListener.DRAWABLE_INDEX_BOTTOM );
        }

        /**
         * This will create a new instance of a
         * {@link BottomDrawableClickListener} object.
         * 
         * @param view
         *            The {@link TextView} that this
         *            {@link BottomDrawableClickListener} is associated with.
         * @param fuzzOverride
         *            The number of pixels of &quot;fuzz&quot; that should be
         *            included to account for the size of a finger.
         */
        public BottomDrawableClickListener( final TextView view, final int fuzz )
        {
            super( view, DrawableClickListener.DRAWABLE_INDEX_BOTTOM, fuzz );
        }

        /* PUBLIC METHODS */
        public boolean isClickOnDrawable( final int x, final int y, final View view, final Rect drawableBounds, final int fuzz )
        {
            if ( x >= ( view.getPaddingLeft() - fuzz ) )
            {
                if ( x <= ( view.getWidth() - view.getPaddingRight() + fuzz ) )
                {
                    if ( y >= ( view.getHeight() - view.getPaddingBottom() - drawableBounds.height() - fuzz ) )
                    {
                        if ( y <= ( view.getHeight() - view.getPaddingBottom() + fuzz ) )
                        {
                            return true;
                        }
                    }
                }
            }
            return false;
        }

    }

}

我在Mono中实现了@aristo_sh answer。Droid (Xamarin)因为它是一个委托匿名方法你不能返回true或false你必须取e。event。handled。我还隐藏了点击键盘

editText.Touch += (sender, e) => {
                    e.Handled = false;
                    if (e.Event.Action == MotionEventActions.Up)
                    {
                        if (e.Event.RawX >= (bibEditText.Right - (bibEditText.GetCompoundDrawables()[2]).Bounds.Width()))
                        {
                            SearchRunner();
                            InputMethodManager manager = (InputMethodManager)GetSystemService(InputMethodService);
                            manager.HideSoftInputFromWindow(editText.WindowToken, 0);
                            e.Handled = true;
                        }
                    }
                };

还有更优雅的方式: 不要在TextInputEditText中使用android:drawableRight或android:drawableEnd。

相反,你可以用:

<com.google.android.material.textfield.TextInputLayout
    ...
    app:endIconMode="custom"
    app:endIconDrawable="@drawable/..."

然后使用endIconOnClickListener:

textInputLayout.setEndIconOnClickListener {
  // Respond to end icon presses
}

来源:https://stackoverflow.com/a/65940540/13545849

考虑以下几点。这不是最优雅的解决方案,但它是有效的,我刚刚测试过。

Create a customized EditText class CustomEditText.java: import android.content.Context; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.view.MotionEvent; import android.widget.EditText; public class CustomEditText extends EditText { private Drawable dRight; private Rect rBounds; public CustomEditText(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public CustomEditText(Context context, AttributeSet attrs) { super(context, attrs); } public CustomEditText(Context context) { super(context); } @Override public void setCompoundDrawables(Drawable left, Drawable top, Drawable right, Drawable bottom) { if(right !=null) { dRight = right; } super.setCompoundDrawables(left, top, right, bottom); } @Override public boolean onTouchEvent(MotionEvent event) { if(event.getAction() == MotionEvent.ACTION_UP && dRight!=null) { rBounds = dRight.getBounds(); final int x = (int)event.getX(); final int y = (int)event.getY(); //System.out.println("x:/y: "+x+"/"+y); //System.out.println("bounds: "+bounds.left+"/"+bounds.right+"/"+bounds.top+"/"+bounds.bottom); //check to make sure the touch event was within the bounds of the drawable if(x>=(this.getRight()-rBounds.width()) && x<=(this.getRight()-this.getPaddingRight()) && y>=this.getPaddingTop() && y<=(this.getHeight()-this.getPaddingBottom())) { //System.out.println("touch"); this.setText(""); event.setAction(MotionEvent.ACTION_CANCEL);//use this to prevent the keyboard from coming up } } return super.onTouchEvent(event); } @Override protected void finalize() throws Throwable { dRight = null; rBounds = null; super.finalize(); } } Change your layout XML to this (where com.example is your actual project package name): <com.example.CustomEditText android:id="@+id/txtsearch" … android:layout_gravity="center_vertical" android:background="@layout/shape" android:hint="Enter place,city,state" android:drawableRight="@drawable/cross" /> Finally, add this (or something similar) to your activity: … CustomEditText et = (CustomEditText) this.findViewById(R.id.txtsearch); …

我可能在计算嵌套drawable的触摸边界时有点出错,但你懂的。

我希望这能有所帮助。

这一切都很棒,但为什么不让它变得更简单呢?

不久前我也遇到过这种情况……和android touchlistener工作得很好,但在使用上有限制..我找到了另一个解决方案,我希望能帮助你:

    <LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/zero_row">
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="match_parent">
            <ProgressBar
                android:id="@+id/loadingProgressBar"
                android:layout_gravity="center"
                android:layout_width="28dp"
                android:layout_height="28dp" />
        </LinearLayout>
        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:background="@drawable/edittext_round_corners"
            android:layout_height="match_parent"
            android:layout_marginLeft="5dp">
            <ImageView
                android:layout_width="28dp"
                android:layout_height="28dp"
                app:srcCompat="@android:drawable/ic_menu_search"
                android:id="@+id/imageView2"
                android:layout_weight="0.15"
                android:layout_gravity="center|right"
                android:onClick="OnDatabaseSearchEvent" />
            <EditText
                android:minHeight="40dp"
                android:layout_marginLeft="10dp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/edittext_round_corners"
                android:inputType="textPersonName"
                android:hint="Search.."
                android:textColorHint="@color/AndroidWhite"
                android:textColor="@color/AndroidWhite"
                android:ems="10"
                android:id="@+id/e_d_search"
                android:textCursorDrawable="@color/AndroidWhite"
                android:layout_weight="1" />
            <ImageView
                android:layout_width="28dp"
                android:layout_height="28dp"
                app:srcCompat="@drawable/ic_oculi_remove2"
                android:id="@+id/imageView3"
                android:layout_gravity="center|left"
                android:layout_weight="0.15"
                android:onClick="onSearchEditTextCancel" />
        </LinearLayout>

        <!--android:drawableLeft="@android:drawable/ic_menu_search"-->
        <!--android:drawableRight="@drawable/ic_oculi_remove2"-->

    </LinearLayout>

</LinearLayout>

现在您可以创建ImageClick侦听器或事件,并对文本做任何您想做的事情。这个edittext_round_corners.xml文件

<item android:state_pressed="false" android:state_focused="false">
    <shape>
        <gradient
            android:centerY="0.2"
            android:startColor="@color/colorAccent"
            android:centerColor="@color/colorAccent"
            android:endColor="@color/colorAccent"
            android:angle="270"
            />
        <stroke
            android:width="0.7dp"
            android:color="@color/colorAccent" />
        <corners
            android:radius="5dp" />
    </shape>
</item>