据How to style PopupMenu?你不能直接设置弹出菜单的风格,这似乎违背https://developer.android.com/reference/android/widget/PopupWindow.html为什么我的风格不适用于我的popupMenu?
它规定你可以在的弹出菜单构造函数中指定的样式。根据http://blog.http417.com/2014/06/styling-popupmenu.html它看起来像我需要指定的属性是“android:popupBackground”和“android:dropDownWidth”。但是,以下只是删除默认的样式和不适我想要的颜色或宽度:
styles.xml:
<style name="popup">
<item name="android:popupBackground">@color/material_blue_grey_800</item>
<item name="android:dropDownWidth">350dp</item>
</style>
ActivityA.java
public class ActivityA extends AppCompatActivity implements
PopupMenu.OnMenuItemClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_a);
findViewById(R.id.popupBtn).setOnClickListener(new
View.OnClickListener() {
@Override
public void onClick(View button) {
PopupMenu popupMenu = new PopupMenu(ActivityA.this,
button, Gravity.RIGHT, 0, R.style.popup);
}
}
@Override
public boolean onMenuItemClick(MenuItem item) {
return false;
}
}
activity_a.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".activities.ActivityA">
<Button
android:id="@+id/popupBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:text="Press to open menu"/>
</RelativeLayout>
为什么我们不能应用样式编程时,有提供它的构造函数。 –