2013.12.03（3） ——— android ActionbarSherlockSample之ActionItems

2013.12.03（3） ——— android ActionbarSherlockSample之ActionItems

/*
 * Copyright (C) 2011 Jake Wharton
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.actionbarsherlock.sample.demos;

import android.os.Bundle;
import android.widget.TextView;

import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;

public class ActionItems extends SherlockActivity {
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        //Used to put dark icons on light action bar
        boolean isLight = SampleList.THEME == R.style.Theme_Sherlock_Light;

        menu.add("Save")
            .setIcon(isLight ? R.drawable.ic_compose_inverse : R.drawable.ic_compose)
            .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);

        menu.add("Search")
            .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);

        menu.add("Refresh")
            .setIcon(isLight ? R.drawable.ic_refresh_inverse : R.drawable.ic_refresh)
            .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);

        return true;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setTheme(SampleList.THEME); //Used for theme switching in samples
        super.onCreate(savedInstanceState);
        setContentView(R.layout.text);
        setContent((TextView)findViewById(R.id.text));
    }

    protected void setContent(TextView view) {
        view.setText(R.string.action_items_content);
    }
}

参考： http://su1216.iteye.com/blog/1550551

setShowAsAction：设置ActionBar中menu的显示方式
显示方式一共有如下5种：
从不显示;如果有空间就显示;总是显示;显示时跟随文字;默认收缩其action view

/** Never show this item as a button in an Action Bar. */
    public static final int SHOW_AS_ACTION_NEVER = android.view.MenuItem.SHOW_AS_ACTION_NEVER;
    /** Show this item as a button in an Action Bar if the system decides there is room for it. */
    public static final int SHOW_AS_ACTION_IF_ROOM = android.view.MenuItem.SHOW_AS_ACTION_IF_ROOM;
    /**
     * Always show this item as a button in an Action Bar.
     * Use sparingly! If too many items are set to always show in the Action Bar it can
     * crowd the Action Bar and degrade the user experience on devices with smaller screens.
     * A good rule of thumb is to have no more than 2 items set to always show at a time.
     */
    public static final int SHOW_AS_ACTION_ALWAYS = android.view.MenuItem.SHOW_AS_ACTION_ALWAYS;

    /**
     * When this item is in the action bar, always show it with a text label even if
     * it also has an icon specified.
     */
    public static final int SHOW_AS_ACTION_WITH_TEXT = android.view.MenuItem.SHOW_AS_ACTION_WITH_TEXT;

    /**
     * This item's action view collapses to a normal menu item.
     * When expanded, the action view temporarily takes over
     * a larger segment of its container.
     */
    public static final int SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW = android.view.MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW;

当然这个也是actionbarsherlock里面的，你可以看出来 他直接等于了android的

其中SHOW_AS_ACTION_WITH_TEXT需要注意一下
在手机中，竖屏状态下text是不会显示的，切换到横屏才会显示text

SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW也需要特别说明一下
menu的每个item都可以设置action view，如果设置了，那么这个view默认是显示的，设置了SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW后，则默认不显示

另外需要说明的是：
现在手机有两种，一种是有实体按键的手机，不在action bar显示的item，按menu则会看到剩余的item
另一种是没有实体menu键的手机，他们通过action bar等触发menu，所有的item都会在action bar显示，“显示不下”的item会在action bar最后一个item触发显示剩余item列表，类似于之前我们按menu键后出现的“more”