android studio关闭类名引用,Android Studio，调用不同文件中的不同类

我已经写下了一段代码，以引用名为Forecast Fragment的类，并运行该应用程序。但第33行，我得到一个错误“无法解析符号‘机器人’”Android Studio，调用不同文件中的不同类

package com.example.sunshinepre_beta;

import android.os.Bundle;

import android.app.Activity;

import android.support.v7.app.ActionBarActivity;

import android.view.Menu;

import android.view.MenuItem;

public class MainActivity extends ActionBarActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

if (savedInstanceState == null) {

int commit = getSupportFragmentManager().beginTransaction()

.add(R.id.container, new com.example.android.sunshinepre_beta.app.ForecastFragment())

.commit();

}

}

@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) {

// Handle action bar item clicks here. The action bar will

// automatically handle clicks on the Home/Up button, so long

// as you specify a parent activity in AndroidManifest.xml.

int id = item.getItemId();

if (id == R.id.action_settings) {

return true;

}

return super.onOptionsItemSelected(item);

}

}

2014-11-02

Kai