錯誤無法解析R.layout.list_item_forecast和R.id.list_item_forecast_textview

Question

我參加了udacity課程，我對Android非常陌生，所以我知道我錯過了一些非常基本的東西。

我正在給我的錯誤說他們不能得到解決R.layout.list_item_forecast和R.id.list_item_forecast_textview

任何幫助表示讚賞兩個符號變量。

package com.example.android.sunshine.app; 
 

 
import android.support.v7.app.ActionBarActivity; 
 
import android.support.v4.app.Fragment; 
 
import android.os.Bundle; 
 
import android.view.LayoutInflater; 
 
import android.view.Menu; 
 
import android.view.MenuItem; 
 
import android.view.View; 
 
import android.view.ViewGroup; 
 
import android.widget.ListView; 
 
import android.widget.ArrayAdapter; 
 
import java.util.ArrayList; 
 
import java.util.Arrays; 
 
import java.util.List; 
 

 
public class MainActivity extends ActionBarActivity { 
 

 

 
    @Override 
 
    protected void onCreate(Bundle savedInstanceState) { 
 
     super.onCreate(savedInstanceState); 
 
     setContentView(R.layout.activity_main); 
 
     if (savedInstanceState == null) { 
 
      getSupportFragmentManager().beginTransaction() 
 
        .add(R.id.container, new PlaceholderFragment()) 
 
        .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(); 
 

 
     //noinspection SimplifiableIfStatement 
 
     if (id == R.id.action_settings) { 
 
      return true; 
 
     } 
 

 
     return super.onOptionsItemSelected(item); 
 
    } 
 

 
    /** 
 
    * A placeholder fragment containing a simple view. 
 
    */ 
 
    public static class PlaceholderFragment extends Fragment { 
 
     ArrayAdapter<String> mForecastAdapter; 
 
     public PlaceholderFragment() { 
 
     } 
 

 
     @Override 
 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
 
           Bundle savedInstanceState) { 
 
      View rootView = inflater.inflate(R.layout.fragment_main, container, false); 
 

 
      String[] data = { 
 
        "Today - Sunny - 88/63", 
 
        "Tomorrow - Foggy 70/40", 
 
        "Weds - Cloudy 72/62", 
 
        "Thurs - Snow 34 Possible!!", 
 
        "Fri - Milk Bread TP", 
 
        "Sat - Cloudy 72/62", 
 
        "Sun - Cloudy 72/62", 
 
      }; 
 
      List<String> weekForecast = new ArrayList<String>(Arrays.asList(data)); 
 
      char shape; 
 

 
      mForecastAdapter = new ArrayAdapter<String>(
 
          getActivity(), // The current context (this activity) 
 
          R.layout.list_item_forecast, // The name of the layout ID. 
 
          R.id.list_item_forecast_textview, // The ID of the textview to populate. 
 
          weekForecast); 
 

 
      View rootView = inflater.inflate(R.layout.fragment_main, container, false); 
 

 
      ListView listView = (ListView) rootView.findViewById(R.id.listview_forecast); 
 
      listView.setAdapter(mForecastAdapter); 
 

 
      return rootView; 
 
     } 
 
    } 
 
}

Answer 1

layout.list_item_forecast是定義在你的情況下，將只包含文本視圖文本視圖中的每一行佈局文件。 而R.id.list_item_forecast_textview是佈局文件R.layout.list_item_forecast中包含的文本視圖的標識。 分享您的佈局文件以獲取更多幫助:)