appear

appear

关注
发信
关注(28)粉丝(399)

闪屏导致的MenuItems不会出现

本文介绍了闪屏导致的MenuItems不会出现的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我已经建立了一个闪屏加载（闪）活动，然后又开始活动，并能正常工作。 （我在下面附了 - 这就是所谓的SPLASH 1）

我创建了另一个闪屏取代它这应该只运行一次 - 然后创建一个共享preferences后布尔它应该加载另一个活动。一切似乎罚款这一点，但现在，当它加载了新的活动，没有一个菜单项的出现。我不知道在SPLASH 2什么改变 - 但东西在里面是造成的MenuItems 不要出现加载完全相同的活动SPLASH 1做（NEWCORE.JAVA）后

我真的不知道是怎么回事 - 任何帮助是极大的AP preciated

！

（请让我知道是否需要任何额外的信息）

SPLASH 1（工作）

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

公共类闪屏延伸活动{

私人布尔mIsBackButton pressed;
私有静态最终诠释SPLASH_DURATION = 1000;

公共无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;

    的setContentView（R.layout.splash_screen）;

    处理程序处理程序=新的处理程序（）;

    // 2秒后运行一个线程来启动主屏幕
    handler.postDelayed（新的Runnable（）{

        @覆盖
        公共无效的run（）{

            //确保我们关闭闪屏，使用户不会回来当presses返回键

            完（）;

            如果（！mIsBackButton pressed）{
                //启动主屏幕，如果后退按钮不是$ P $已经pssed
                意向意图=新的意图（SplashScreen.this，NewCore.class）;
                SplashScreen.this.startActivity（意向）;
           }

        }

    }，SPLASH_DURATION）; //时间在毫秒（1秒= 1000毫秒），直到run（）方法将被调用

}

@覆盖
 公共无效onBack pressed（）{

    //设置标志设置为true，以便在未来的活动将无法启动
    mIsBackButton pressed = TRUE;
    super.onBack pressed（）;

}
}

SPLASH 2（不工作 - 使菜单项没有出现在它加载的活动）

 进口android.app.Activity;
进口android.os.Bundle;
进口android.os.Handler;
进口android.content.Intent;
进口com.nfc.linkingmanager.R;
进口android.content.Shared preferences;
进口的java.lang.Object;
。进口的Andr​​oid preference preferenceManager。


公共类闪屏扩展活动
{
私人处理程序处理程序=新的处理程序（）
{
   公共无效的handleMessage（信息MSG）
   {
       意图I =新的意图（SplashScreen.this，AppActivity.class）;
       SplashScreen.this.startActivity（ⅰ）;
                            this.finish（）;
   }
};

保护无效的onCreate（包savedInstanceState）
{
   super.onCreate（savedInstanceState）;

   共享preferences preFS = preferenceManager.getDefaultShared preferences（本）;
   如果（！prefs.getBoolean（FIRST_TIME，FALSE））
   {
       共享preferences.Editor编辑器= prefs.edit（）;
       editor.putBoolean（FIRST_TIME，真正的）;
       editor.commit（）;
       意图I =新的意图（SplashScreen.this，NewCore.class）;
       this.startActivity（ⅰ）;
                            this.finish（）;
   }
   其他
   {
       this.setContentView（R.layout.country_list）;
       handler.sendEmptyMessageDelayed（0，2000）;
   }

 }
 }

NEWCORE.JAVA（连接到由两个闪屏 - 仅使用SPLASH 2时失踪的MenuItems）

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

公共类NewCore扩展ListActivity {

 公共静态最后弦乐ROW_ID =ROW_ID;
 私人的ListView conListView;
 私人的CursorAdapter conAdapter;

 @覆盖
 公共无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    conListView = getListView（）;
    conListView.setOnItemClickListener（viewConListener）;

    //每名映射到一个TextView
    的String []从=新的String [] {姓名};
    INT []到=新INT [] {R.id.countryTextView};
    conAdapter =新SimpleCursorAdapter（NewCore.this，R.layout.country_list，空，从，到）;
    setListAdapter（conAdapter）; //设置适配器
}


@覆盖
保护无效onResume（）
{
   super.onResume（）;
   新GetContacts（）执行（（对象[]）NULL）;
 }


 @覆盖
 保护无效的onStop（）
 {
   光标光标= conAdapter.getCursor（）;

   如果（光标！= NULL）
      cursor.deactivate（）;

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


 私有类GetContacts扩展的AsyncTask＆LT;对象，对象，光标＆GT;
 {
   DatabaseConnector dbConnector =新DatabaseConnector（NewCore.this）;

   @覆盖
   受保护的光标doInBackground（对象... PARAMS）
   {
      dbConnector.open（）;
      返回dbConnector.getAllContacts（）;
   }

   @覆盖
   保护无效onPostExecute（光标结果）
   {
      conAdapter.changeCursor（结果）; //设置适配器的游标
      dbConnector.close（）;
   }
}

@覆盖
公共布尔onCreateOptionsMenu（菜单菜单）
{
   super.onCreateOptionsMenu（菜单）;
   MenuInflater充气= getMenuInflater（）;
   inflater.inflate（R.menu.country_menu，菜单）;
   返回true;
}

@覆盖
公共布尔onOptionsItemSelected（菜单项项）
{
   意图的addContact =新的意图（NewCore.this，NewCore.class）;
   startActivity（的addContact）;
   返回super.onOptionsItemSelected（项目）;
}

OnItemClickListener viewConListener =新OnItemClickListener（）
{
   公共无效onItemClick（适配器视图＆LT;＆GT;为arg0，查看ARG1，INT ARG2，长ARG3）
   {
      意图viewCon =新的意图（NewCore.this，NewCore.class）;
      viewCon.putExtra（ROW_ID，ARG3）;
      startActivity（viewCon）;
   }
};

}

解决方案

在开机2将

 的setContentView（R.layout.country_list）;

正下方 super.onCreate（savedInstanceState）;

I've built a splash screen that loads a (splash) activity and then starts another activity and it works fine. (I've attached it below - it's called SPLASH 1)

I created another splash screen to replace this one which is supposed to only run once - then after creating a SharedPreferences boolean it is supposed to load another activity. Everything seems fine with this but now when it loads the new activity, none of the menuitems appear. I have no idea what changed in SPLASH 2 - but something in there is causing the MenuItems not to appear after it loads the exact same activity SPLASH 1 does (NEWCORE.JAVA)

I'm really not sure what is going on here - any help is greatly appreciated!

(please let me know if any additional info is needed)

SPLASH 1. (WORKING)

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 (NOT WORKING - CAUSES MENUITEMS not to appear on the activity it loads)

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 (Connected to by both Splash Screens - Only missing MenuItems when using SPLASH 2)

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);
   }
};

}
解决方案

In Splash 2 put 

SetContentView(R.layout.country_list);

just belowsuper.onCreate(savedInstanceState);

这篇关于闪屏导致的MenuItems不会出现的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

09-03 00:16
Powered by LMLPHP ©2024 appear 0.051911