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这是一个带有可点击按钮的操作栏示例，我尝试将其应用于其他活动，但我未能成功他的代码非常简单，但我看不出他是如何做到的，这是我谈论的示例http://www.brucephillips。名称/博客/index.cfm/2011/12/28/Android-App-Development--Using-The-ActionBar-Widget 有人知道他是怎么做到的吗？当我尝试它时，动作栏不见了。这是他在java中的代码

package name.brucephillips.actionbarexample;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;

public class ActionBarExampleActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.mainmenu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Toast.makeText(this, "MenuItem " + item.getTitle() + " selected.", Toast.LENGTH_SHORT).show();
        return true;
    }
}

这是他的主菜单

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item android:id="@+id/open" android:showAsAction="ifRoom|withText" android:title="Open" android:icon="@drawable/ic_action_open"></item>
    <item android:id="@+id/save" android:showAsAction="ifRoom|withText" android:title="Save" android:icon="@drawable/ic_action_save"></item>
    <item android:id="@+id/close" android:showAsAction="ifRoom|withText" android:title="Close" android:icon="@drawable/ic_action_close"></item>
    <item android:id="@+id/history" android:showAsAction="ifRoom|withText" android:title="History" android:icon="@drawable/ic_action_history"></item>
    <item android:id="@+id/settings" android:showAsAction="ifRoom|withText" android:title="Settings" android:icon="@drawable/ic_action_settings"></item>


</menu>

这是他的主要活动

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/textview"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:text="@string/introduction"/>

</LinearLayout>
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1 回答 1

1

试试这个可能是您的设备没有适当的密度来显示菜单。

 android:uiOptions="splitActionBarWhenNarrow"

把它放在清单中的活动标签中。

更新：-

菜单的完整代码按原样放置此代码....

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;

public class AndroidMenusActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    // Initiating Menu XML file (menu.xml)
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        MenuInflater menuInflater = getMenuInflater();
        menuInflater.inflate(R.menu.menu,menu);
        MenuItem item = menu.getItem(0);
        String itemTitle = item.getTitle().toString();
        Toast.makeText(this, "First menu item is: " + itemTitle, Toast.LENGTH_LONG).show();

        return true;
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {

        switch (item.getItemId())
        {
        case R.id.menu_bookmark:

            Toast.makeText(this, "Bookmark is Selected",
                    Toast.LENGTH_SHORT).show();
            return true;

        case R.id.menu_save:
            Toast.makeText(this, "Save is Selected", 
                    Toast.LENGTH_SHORT).show();
            return true;

        case R.id.menu_search:
            Toast.makeText(this, "Search is Selected",
                    Toast.LENGTH_SHORT).show();
            return true;

        case R.id.menu_share:
            Toast.makeText(this, "Share is Selected", 
                    Toast.LENGTH_SHORT).show();
            return true;

        case R.id.menu_delete:
            Toast.makeText(this, "Delete is Selected",
                    Toast.LENGTH_SHORT).show();
            return true;


        default:
            return false;
        }
    }    

}

//main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="hello" />

</LinearLayout>

//menu.xml 它应该在 res 内的 menu 文件夹中

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/menu_bookmark"
        android:showAsAction="ifRoom"
        android:title="mark"/>
    <item
        android:id="@+id/menu_save"
        android:showAsAction="ifRoom|withText"
        android:title="Save"/>
    <item
        android:id="@+id/menu_search"
        android:showAsAction="ifRoom"
        android:title="Search"/>
    <item
        android:id="@+id/menu_share"
        android:showAsAction="ifRoom"
        android:title="Share"/>
    <item
        android:id="@+id/menu_delete"
        android:showAsAction="ifRoom"
        android:title="Delete"/>

</menu>

//显现

像这样把 uiOption 放在活动中

<activity
            android:name=".AndroidMenusActivity"
            android:label="@string/app_name"
            android:uiOptions="splitActionBarWhenNarrow" >
于 2013-04-25T04:08:18.173 回答