android资源：菜单和assets

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="com.mytest.testbase.MainActivity" >

    <item
        android:id="@+id/showDialog"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="dialog"/>
    
    <item
        android:id="@+id/showToast"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="toast"/>    
</menu>

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
    
        int id = item.getItemId();
        if (id == R.id.showDialog) {
            new AlertDialog.Builder(this).setTitle("测试").setPositiveButton("关闭", new DialogInterface.OnClickListener() {
                
                @Override
                public void onClick(DialogInterface dialog, int which) {
                
                    Toast.makeText(MainActivity.this, "showDialog", Toast.LENGTH_SHORT).show();
                }
            }).show();
        }    if (id == R.id.showToast) {
            Toast.makeText(this, "toast", Toast.LENGTH_SHORT).show();
        }
        return super.onOptionsItemSelected(item);
    }