如何像在 Google 地图应用中一样将 Android 工具栏菜单/图标向左对齐?

问题描述

这是 Google 地图工具栏的屏幕截图.

Here is a screenshot of Google Maps Toolbar.

如您所见，图标是左对齐而不是右对齐(默认行为).我已经尝试将 android:layout_gravity="left" 和 android:gravity="left" 添加到工具栏，但没有用.我还尝试向工具栏添加内部 LinearLayout(具有相同的重力值)，但这也不起作用.有任何想法吗?

As you can see icons are aligned to the left instead of right (default behavior). I've tried adding android:layout_gravity="left" and android:gravity="left" to the toolbar but it didn't work. I also tried adding an internal LinearLayout (with same gravity values) to the Toolbar but that didn't work either. Any ideas?

我希望能够使用带有工具栏小部件的常规 Android 菜单，而不是从头开始重新创建所有内容.

I want to be able to use a regular Android menu with the Toolbar widget instead of recreating everything from scratch.

推荐答案

在对 Android 工具栏代码进行了一些努力和挖掘之后，我设法让它工作了.基本上，这个想法是添加一个新的 android.support.v7.widget.ActionMenuView 作为 Toolbar 的子项，将其重力设置为 top|start，然后将菜单添加到您的 Activity 中的该操作菜单视图.代码如下:

After some struggling and digging in Android Toolbar code I managed to make it work. Basically, the idea is to add a new android.support.v7.widget.ActionMenuView as child of the Toolbar, set its gravity to top|start, and then add the menu to that action menu view in your Activity. Here is the code:

<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/tToolbar"
    android:layout_height="?attr/actionBarSize"
    android:layout_width="match_parent"
    android:background="?attr/colorPrimary"
    android:gravity="center_vertical|start"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

    <android.support.v7.widget.ActionMenuView
        android:id="@+id/amvMenu"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"/>
</android.support.v7.widget.Toolbar>

my_activity.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">

    <!--Toolbar-->
    <include
        android:id="@+id/tToolbar"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        layout="@layout/my_toolbar" />
</RelativeLayout>

MyActivity.java

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.ActionMenuView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

public final class MyActivity extends ActionBarActivity {
  private ActionMenuView amvMenu;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // this layout includes the custom toolbar my_toolbar.xml
    setContentView(R.layout.my_activity);

    Toolbar t = (Toolbar) findViewById(R.id.tToolbar);
    amvMenu = (ActionMenuView) t.findViewById(R.id.amvMenu);
    amvMenu.setOnMenuItemClickListener(new ActionMenuView.OnMenuItemClickListener() {
      @Override
      public boolean onMenuItemClick(MenuItem menuItem) {
        return onOptionsItemSelected(menuItem);
      }
    });

    setSupportActionBar(t);
    getSupportActionBar().setTitle(null);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    // use amvMenu here
    inflater.inflate(R.menu.my_activity_menu, amvMenu.getMenu());
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Do your actions here
    return true;
  }
}

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