下面是kotlin中简单的完整解决方案。

整个布局就是你的搜索栏

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="35dp"
        android:layout_margin="10dp"
        android:background="@drawable/your_desired_drawable">

        <EditText
            android:id="@+id/search_et"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentStart="true"
            android:layout_toStartOf="@id/clear_btn"
            android:background="@null"
            android:hint="search..."
            android:imeOptions="actionSearch"
            android:inputType="text"
            android:maxLines="1"
            android:paddingStart="15dp"
            android:paddingEnd="10dp" />

        <ImageView
            android:id="@+id/clear_btn"
            android:layout_width="20dp"
            android:layout_height="match_parent"
            android:layout_alignParentEnd="true"
            android:layout_centerInParent="true"
            android:layout_marginEnd="15dp"
            android:visibility="gone"
            android:src="@drawable/ic_baseline_clear_24"/>

    </RelativeLayout>

现在这是清除按钮的功能，粘贴这段代码在onCreate方法。

search_et.addTextChangedListener(object: TextWatcher {
            override fun beforeTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {
            }
            override fun onTextChanged(s:CharSequence, start:Int, before:Int, count:Int) {
            }
            override fun afterTextChanged(s: Editable) {
                if (s.isNotEmpty()){
                    clear_btn.visibility = VISIBLE
                    clear_btn.setOnClickListener {
                        search_et.text.clear()
                    }
                }else{
                    clear_btn.visibility = GONE
                }
            }
        })

如果你碰巧使用DroidParts，我刚刚添加了clearleedittext。

下面是自定义背景和清除图标设置为abs__ic_clear_holo_light的效果:

这是一个kotlin溶液。把这个助手方法放在某个kotlin文件中

fun EditText.setupClearButtonWithAction() {

    addTextChangedListener(object : TextWatcher {
        override fun afterTextChanged(editable: Editable?) {
            val clearIcon = if (editable?.isNotEmpty() == true) R.drawable.ic_clear else 0
            setCompoundDrawablesWithIntrinsicBounds(0, 0, clearIcon, 0)
        }

        override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) = Unit
        override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) = Unit
    })

    setOnTouchListener(View.OnTouchListener { _, event ->
        if (event.action == MotionEvent.ACTION_UP) {
            if (event.rawX >= (this.right - this.compoundPaddingRight)) {
                this.setText("")
                return@OnTouchListener true
            }
        }
        return@OnTouchListener false
    })
}

然后像下面那样在onCreate方法中使用它，你应该很好

yourEditText.setupClearButtonWithAction()

顺便说一句，你必须添加R.drawable。Ic_clear或清除图标。这个来自谷歌- https://fonts.google.com/icons?selected=Material%20Icons%20Outlined%3Aclear%3A

下面是kotlin中简单的完整解决方案。

整个布局就是你的搜索栏

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="35dp"
        android:layout_margin="10dp"
        android:background="@drawable/your_desired_drawable">

        <EditText
            android:id="@+id/search_et"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentStart="true"
            android:layout_toStartOf="@id/clear_btn"
            android:background="@null"
            android:hint="search..."
            android:imeOptions="actionSearch"
            android:inputType="text"
            android:maxLines="1"
            android:paddingStart="15dp"
            android:paddingEnd="10dp" />

        <ImageView
            android:id="@+id/clear_btn"
            android:layout_width="20dp"
            android:layout_height="match_parent"
            android:layout_alignParentEnd="true"
            android:layout_centerInParent="true"
            android:layout_marginEnd="15dp"
            android:visibility="gone"
            android:src="@drawable/ic_baseline_clear_24"/>

    </RelativeLayout>

现在这是清除按钮的功能，粘贴这段代码在onCreate方法。

search_et.addTextChangedListener(object: TextWatcher {
            override fun beforeTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {
            }
            override fun onTextChanged(s:CharSequence, start:Int, before:Int, count:Int) {
            }
            override fun afterTextChanged(s: Editable) {
                if (s.isNotEmpty()){
                    clear_btn.visibility = VISIBLE
                    clear_btn.setOnClickListener {
                        search_et.text.clear()
                    }
                }else{
                    clear_btn.visibility = GONE
                }
            }
        })

    <EditText
    android:id="@+id/idSearchEditText"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dimen_40dp"
    android:drawableStart="@android:drawable/ic_menu_search"
    android:drawablePadding="8dp"
    android:ellipsize="start"
    android:gravity="center_vertical"
    android:hint="Search"
    android:imeOptions="actionSearch"
    android:inputType="text"
    android:paddingStart="16dp"
    android:paddingEnd="8dp"
/>

EditText mSearchEditText = findViewById(R.id.idSearchEditText);
mSearchEditText.addTextChangedListener(this);
mSearchEditText.setOnTouchListener(this);


@Override
public void afterTextChanged(Editable aEditable) {
    int clearIcon = android.R.drawable.ic_notification_clear_all;
    int searchIcon = android.R.drawable.ic_menu_search;
    if (aEditable == null || TextUtils.isEmpty(aEditable.toString())) {
        clearIcon = 0;
        searchIcon = android.R.drawable.ic_menu_search;
    } else {
        clearIcon = android.R.drawable.ic_notification_clear_all;
        searchIcon = 0;
    }
    Drawable leftDrawable =  null;
    if (searchIcon != 0) {
        leftDrawable = getResources().getDrawable(searchIcon);
    }
    Drawable rightDrawable = null;
    if (clearIcon != 0) {
        rightDrawable = getResources().getDrawable(clearIcon);
    }

    mSearchEditText.setCompoundDrawablesWithIntrinsicBounds(leftDrawable, null, rightDrawable, null);
}


@Override
public boolean onTouch(View aView, MotionEvent aEvent) {
    if (aEvent.getAction() == MotionEvent.ACTION_UP){
        if (aEvent.getX() > ( mSearchEditText.getWidth() - 
         mSearchEditText.getCompoundPaddingEnd())){
            mSearchEditText.setText("");
        }
    }
    return false;
}

下面是带有小部件的完整库: https://github.com/opprime/EditTextField

要使用它，你应该添加依赖:

compile 'com.optimus:editTextField:0.2.0'

在layout.xml文件中，你可以设置小部件:

xmlns:app="http://schemas.android.com/apk/res-auto"

app:clearButtonMode,can有这样的值: 从来没有 总是 whileEditing unlessEditing 应用:clearButtonDrawable

实际例子: