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()
    }

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>

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;
  }
}

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。

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()。

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
}