[英]How to change toolbar menu item background color?
您可以获取该项目并将其作为MenuItem,然后可以使用setActionView来使用必须先充气的布局xml文件,如下所示:
MenuItem alerts;
然后在您的onCreateOptionsMenu上:
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
alerts = menu.findItem(R.id.alerts);
...
然后在任何需要的地方:
View view = getLayoutInflater().inflate(R.layout.notification_badge, null);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(v.getContext(), NotificationsActivity.class));
}
});
最后:
alerts.setActionView(view);
您遇到了创建自定义标签图标的最佳示例,如下所示
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);
viewPager.setAdapter(new TabPagerAdapter(getSupportFragmentManager()));
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);
tabLayout.setupWithViewPager(viewPager);
TabLayout.Tab tabCall = tabLayout.getTabAt(0);
tabCall.setIcon(R.drawable.selector_call);
TabLayout.Tab tabHeart = tabLayout.getTabAt(1);
tabHeart.setIcon(R.drawable.selector_heart);
TabLayout.Tab tabContacts = tabLayout.getTabAt(2);
tabContacts.setIcon(R.drawable.selector_contacts);
}
class TabPagerAdapter extends FragmentPagerAdapter {
public TabPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public int getCount() {
return 3;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new CallFragment();
case 1:
return new HeartFragment();
case 2:
return new ContactsFragment();
}
return null;
}
}
}
使用选择器:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_selected="true"
android:drawable="@drawable/contacts_selected" />
<item
android:state_selected="false"
android:drawable="@drawable/contacts_unselected" />
</selector>
有关更多详细信息,请参考:
https://www.androidhive.info/2015/09/android-material-design-working-with-tabs/
您需要在res文件夹中创建一个包颜色,在该颜色包中创建一个XML文件,如下所示:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:color="@color/colorWhite" />
<item android:color="@color/colorLightGrey" />
</selector>
选中该选项后,该xml会将您的项目显示为白色,否则显示为灰色。
要使用此文件,您只需要将其添加到底部导航视图中:
app:itemIconTint="@color/nav_item_state_list"
app:itemTextColor="@color/nav_item_state_list"
nav_item_state_list是上面的xml文件。
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