初始屏幕導致MenuItems不出現

Question

我已經構建了一個啓動屏幕來加載（啓動）活動，然後啓動另一個活動，它工作正常。 （我在下面附加 - 它叫做SPLASH 1）

我創建了另一個啓動畫面來替換這個應該只運行一次的閃屏 - 然後在創建一個SharedPreferences布爾值後，它應該加載另一個活動。一切似乎都很好，但現在當它加載新的活動時，沒有任何菜單項出現。我不知道在SPLASH 2中發生了什麼變化 - 但是有些東西會導致MenuItems在加載完全相同的活動SPLASH 1後無法顯示（NEWCORE.JAVA）

我真的不確定發生了什麼在這裏 - 任何幫助非常感謝！

（請讓我知道是否需要任何額外的信息）

SPLASH 1（工作）

import android.app.Activity; 
import android.os.Bundle; 
import android.os.Handler; 
import android.content.Intent; 
import com.nfc.linkingmanager.R; 

public class SplashScreen extends Activity { 

private boolean mIsBackButtonPressed; 
private static final int SPLASH_DURATION = 1000; 

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.splash_screen); 

    Handler handler = new Handler(); 

    // run a thread after 2 seconds to start the home screen 
    handler.postDelayed(new Runnable() { 

     @Override 
     public void run() { 

      // make sure we close the splash screen so the user won't come back when it presses back key 

      finish(); 

      if (!mIsBackButtonPressed) { 
       // start the home screen if the back button wasn't pressed already 
       Intent intent = new Intent(SplashScreen.this, NewCore.class); 
       SplashScreen.this.startActivity(intent); 
      } 

     } 

    }, SPLASH_DURATION); // time in milliseconds (1 second = 1000 milliseconds) until the run() method will be called 

} 

@Override 
public void onBackPressed() { 

    // set the flag to true so the next activity won't start up 
    mIsBackButtonPressed = true; 
    super.onBackPressed(); 

} 
} 

SPLASH 2（不工作 - 導致的菜單項不會出現在它加載的活動）

import android.app.Activity; 
import android.os.Bundle; 
import android.os.Handler; 
import android.content.Intent; 
import com.nfc.linkingmanager.R; 
import android.content.SharedPreferences; 
import java.lang.Object; 
import android.preference.PreferenceManager; 


public class SplashScreen extends Activity 
{ 
private Handler handler = new Handler() 
{ 
    public void handleMessage(Message msg) 
    { 
     Intent i = new Intent(SplashScreen.this, AppActivity.class); 
     SplashScreen.this.startActivity(i); 
          this.finish(); 
    } 
}; 

protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 

    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); 
    if(!prefs.getBoolean("first_time", false)) 
    { 
     SharedPreferences.Editor editor = prefs.edit(); 
     editor.putBoolean("first_time", true); 
     editor.commit(); 
     Intent i = new Intent(SplashScreen.this, NewCore.class); 
     this.startActivity(i); 
          this.finish(); 
    } 
    else 
    { 
     this.setContentView(R.layout.country_list); 
     handler.sendEmptyMessageDelayed(0, 2000); 
    } 

} 
} 

NEWCORE.JAVA -

（由兩個閃屏僅連接到使用飛濺2時丟失的MenuItems）

import android.os.AsyncTask; 
import android.os.Bundle; 
import android.app.ListActivity; 
import android.content.Intent; 
import android.database.Cursor; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.CursorAdapter; 
import android.widget.ListView; 
import android.widget.SimpleCursorAdapter; 
import android.widget.AdapterView.OnItemClickListener; 

public class NewCore extends ListActivity { 

public static final String ROW_ID = "row_id"; 
private ListView conListView; 
private CursorAdapter conAdapter; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    conListView=getListView(); 
    conListView.setOnItemClickListener(viewConListener); 

    // map each name to a TextView 
    String[] from = new String[] { "name" }; 
    int[] to = new int[] { R.id.countryTextView }; 
    conAdapter = new SimpleCursorAdapter(NewCore.this, R.layout.country_list, null, from, to); 
    setListAdapter(conAdapter); // set adapter 
} 


@Override 
protected void onResume() 
{ 
    super.onResume(); 
    new GetContacts().execute((Object[]) null); 
} 


@Override 
protected void onStop() 
{ 
    Cursor cursor = conAdapter.getCursor(); 

    if (cursor != null) 
     cursor.deactivate(); 

    conAdapter.changeCursor(null); 
    super.onStop(); 
}  


private class GetContacts extends AsyncTask<Object, Object, Cursor> 
{ 
    DatabaseConnector dbConnector = new DatabaseConnector(NewCore.this); 

    @Override 
    protected Cursor doInBackground(Object... params) 
    { 
     dbConnector.open(); 
     return dbConnector.getAllContacts(); 
    } 

    @Override 
    protected void onPostExecute(Cursor result) 
    { 
     conAdapter.changeCursor(result); // set the adapter's Cursor 
     dbConnector.close(); 
    } 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) 
{ 
    super.onCreateOptionsMenu(menu); 
    MenuInflater inflater = getMenuInflater(); 
    inflater.inflate(R.menu.country_menu, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) 
{ 
    Intent addContact = new Intent(NewCore.this, NewCore.class); 
    startActivity(addContact); 
    return super.onOptionsItemSelected(item); 
} 

OnItemClickListener viewConListener = new OnItemClickListener() 
{ 
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) 
    {   
     Intent viewCon = new Intent(NewCore.this, NewCore.class); 
     viewCon.putExtra(ROW_ID, arg3); 
     startActivity(viewCon); 
    } 
};  

} 

Answer 1

創建一個擴展Android Activity類的新活動，並將您的菜單處理放在那裏。然後，將其他活動中的新活動擴展 - 從而確保菜單處理一致。對於列表，您可以創建第二個新活動來擴展ListActivity，或者獲取ListActivity代碼，並使用菜單擴展先前的活動。

Answer 2

在飛濺2把

SetContentView(R.layout.country_list); 

略低於 super.onCreate(savedInstanceState);