创建ActionBar －Android

官方文档 －－> xml 创建

[链接] (file:///Users/Yun/Library/Application%20Support/Dash/DocSets/Android/Android.docset/Contents/Resources/Documents/docs/guide/topics/ui/actionbar.html#Adding)

• 创建xml
  xml：

    <menu xmlns:android="http://schemas.android.com/apk/res/android" 
    >
    <item android:id="@+id/action_search"
      android:icon="@drawable/ic_action_search"
      android:title="@string/action_search"
      yourapp:showAsAction="ifRoom" />
    <item android:id="@+id/action_compose"
      android:icon="@drawable/ic_action_compose"
      android:title="@string/action_compose" />
    </menu>
  

• 加载xml布局

  java：

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu items for use in the action bar
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.main_activity_actions, menu);
    return super.onCreateOptionsMenu(menu);
    }
  

• 监听事件

  java：

   @Override
  

  public boolean onOptionsItemSelected(MenuItem item) {
  // Handle presses on the action bar items
  switch (item.getItemId()) {
  case R.id.action_search:
  openSearch();
  return true;
  case R.id.action_compose:
  composeMessage();
  return true;
  default:
  return super.onOptionsItemSelected(item);
  }
  }

不使用布局文件创建

• 添加按钮

  java：

  private void addMenuButton(Menu menu) {
   MenuItem item = menu.add(0, 0, 0, "编辑");
  
   {
   	item.setIcon(R.drawable.ic_setting);
   	item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
   }
   item.setOnMenuItemClickListener(this);
  

  }

• 加载布局

java：

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
	addMenuButton(menu);
	super.onCreateOptionsMenu(menu, inflater);
}

• 监听事件

  实现OnMenuItemClickListener接口
  java：

    @Override
    public boolean onMenuItemClick(MenuItem item) {
        switch (item.getItemId()) {
        case 0:
    	    T.showShort(mainActivity, "Demo");
    	    break;
  
        default:
       	    break;
        }
        return false;
    }
  

Fragment中需要在onCreate状态下 设置 setHasOptionsMenu(true);