之前的解决方案在Xamarin Android中都不适用。我能够得到正确的绘制点击监听器工作使用以下:

创建以下OnEditTextTouch事件监听器:

  private void OnEditTextTouch(object sender, View.TouchEventArgs e)
    {
        var rightDrawable = _autoCompleteTextViewSearch.GetCompoundDrawables()[2];

        if (rightDrawable == null || e.Event.Action != MotionEventActions.Up)
        {
            e.Handled = false;

            return;
        }

        if (e.Event.GetX() >= _autoCompleteTextViewSearch.Width - _autoCompleteTextViewSearch.TotalPaddingRight)
        {
            // Invoke your desired action here.

            e.Handled = true;
        }

        // Forward the event along to the sender (crucial for default behaviour)
        (sender as AutoCompleteTextView)?.OnTouchEvent(e.Event);
    }

订阅Touch事件:

_autoCompleteTextViewSearch.Touch += OnEditTextTouch;

    final TextView mTvTitle = (TextView)findViewById(R.id.tvTitle1);

    mTvTitle.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() <= (mTvTitle.getCompoundDrawables()[DRAWABLE_LEFT].getBounds().width()))  {
                    // your action here
                    Intent intent = new Intent(DeAddExpences.this,DeHomeActivity.class);
                    startActivity(intent);
                    return true;
                }
            }
            return true;
        }
    });

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。

如果drawable在左边，这对你有帮助。(适用于使用RTL布局的用户)

 editComment.setOnTouchListener(new 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() <= (searchbox.getLeft() + searchbox.getCompoundDrawables()[DRAWABLE_LEFT].getBounds().width())) {
                                     // your action here

                 return true;
                }
            }
            return false;
        }
    });

扩展了RyanM的想法，我创建了一个更灵活的版本，它支持所有可绘制的类型(上、下、左、右)。虽然下面的代码扩展了TextView，适应它的编辑文本只是交换“扩展TextView”与“扩展EditText”的情况。从XML实例化小部件与在RyanM的示例中相同，只是小部件名称不同。

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.TextView;

import com.example.DrawableClickListener.DrawablePosition;

public class ButtonTextView extends TextView {

private Drawable    drawableRight;
private Drawable    drawableLeft;
private Drawable    drawableTop;
private Drawable    drawableBottom;

private int     actionX, actionY;

private DrawableClickListener clickListener;

public ButtonTextView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

public ButtonTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public ButtonTextView(Context context) {
    super(context);
}

@Override
public void setCompoundDrawables(Drawable left, Drawable top, Drawable right, Drawable bottom) {
    if (right != null) {
        drawableRight = right;
    }

    if (left != null) {
        drawableLeft = left;
    }

    if (top != null) {
        drawableTop = top;
    }

    if (bottom != null) {
        drawableBottom = bottom;
    }

    super.setCompoundDrawables(left, top, right, bottom);
}

@Override
public boolean onTouchEvent(MotionEvent event) {

    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        actionX = (int) event.getX();
        actionY = (int) event.getY();

        if (drawableBottom != null && drawableBottom.getBounds().contains(actionX, actionY)) {
            clickListener.onClick(DrawablePosition.BOTTOM);
            return super.onTouchEvent(event);
        }

        if (drawableTop != null && drawableTop.getBounds().contains(actionX, actionY)) {
            clickListener.onClick(DrawablePosition.TOP);
            return super.onTouchEvent(event);
        }

        if (drawableLeft != null && drawableLeft.getBounds().contains(actionX, actionY)) {
            clickListener.onClick(DrawablePosition.LEFT);
            return super.onTouchEvent(event);
        }

        if (drawableRight != null && drawableRight.getBounds().contains(actionX, actionY)) {
            clickListener.onClick(DrawablePosition.RIGHT);
            return super.onTouchEvent(event);
        }
    }


    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;
}}

DrawableClickListener就像这样简单:

public interface DrawableClickListener {

public static enum DrawablePosition { TOP, BOTTOM, LEFT, RIGHT };
public void onClick(DrawablePosition target); }

然后是实际的实现:

class example implements DrawableClickListener {
public void onClick(DrawablePosition target) {
    switch (target) {
        case LEFT:
            doSomethingA();
            break;

        case RIGHT:
            doSomethingB();
            break;

        case BOTTOM:
            doSomethingC();
            break;

        case TOP:
            doSomethingD();
            break;

        default:
            break;
    }
}}

注:如果你不设置监听器，触摸TextView将导致一个NullPointerException。您可能希望在代码中添加更多的偏执狂。

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()
    }