添加标题栏按钮并添加响应事件

[android]代码库

步骤归纳:
 1. 在Res目录下新建文件夹 menu
 2.右键menu目录-->new --> Menu resource file
 3. 添加代码
     <item
        android:id="@+id/add_item"
        android:title="Add"/>

    <item
        android:id="@+id/remove_item"
        android:title="Remove"/>

 4.在activity中重写onCreateOptionsMenu()方法
   ctrl+o 重写
   代码: 
       public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main,menu);
        return true;
    }

 5.在activity中重写onOptionsItemSelected
   示例代码
       public boolean onOptionsItemSelected(MenuItem item) {
          switch (item.getItemId()) {
              case R.id.add_item:
                  Toast.makeText(this, "add", Toast.LENGTH_SHORT).show();
              case R.id.remove_item:
                  Toast.makeText(this, "remove", Toast.LENGTH_SHORT).show();
          }
         return true;
    }