Question

我的应用中有两项活动。第一项活动SplashScreen和其他SplashActivity。我在sharedPreferences中有SplashScreen，但我想在SplashActivity中设置此值为true。我想如果有可能在SplashActivity中创建一个只运行一次的方法，那么这个方法比较boolean的{{1}}值（比如开始时这是假的）。首次将其设置永久运行为true后，将跳过此方法。我已经做了很多努力但没有成功。

闪屏 -

SplashScreen

SplashActivity -

public class SplashScreen extends Activity 
{
    /** Called when the activity is first created. */
    TimerTask task;
    SharedPreferences pref;
    SharedPreferences.Editor ed;

    @Override
    public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.splash_screen);
       pref = getSharedPreferences("ActivityPREF", Context.MODE_PRIVATE);
       Log.v("","onCreate is calling");
       if(pref.getBoolean("activity_executed", false))
       {
            Log.v("","Before if called");
            setContentView(R.layout.splash_screen);
            Log.v("","after if called");
            new Handler().postDelayed(csRunnable1, 5000);
       } 
       else 
       {
          new Handler().postDelayed(csRunnable2, 5000);  
       }
   }

   Runnable csRunnable1=new Runnable() 
   {       
       @Override
       public void run() 
       {
            Intent intent = new Intent(SplashScreen.this, SplashActivity.class);
               startActivity(intent);
               finish();

       }
   };

   Runnable csRunnable2=new Runnable() 
    {      
       @Override
       public void run() 
       {
            Intent intent = new Intent(SplashScreen.this, LoginActivity.class);
               startActivity(intent);
               finish();

       }
   };
}

我知道这是我需要在public class SplashActivity extends Activity implements OnClickListener { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.welcome); ////////////////////////////////////////////////////////////////////// //////// GAME MENU ///////////////////////////////////////////////// Button playBtn = (Button) findViewById(R.id.playBtn); playBtn.setOnClickListener(this); Button settingsBtn = (Button) findViewById(R.id.settingsBtn); settingsBtn.setOnClickListener(this); Button rulesBtn = (Button) findViewById(R.id.rulesBtn); rulesBtn.setOnClickListener(this); Button exitBtn = (Button) findViewById(R.id.exitBtn); exitBtn.setOnClickListener(this); } /** * Listener for game menu */ @Override public void onClick(View v) { Intent i; switch (v.getId()){ case R.id.playBtn : //once logged in, load the main page //Log.d("LOGIN", "User has started the game"); //Get Question set // List<Question> questions = getQuestionSetFromDb(); //Initialise Game with retrieved question set /// GamePlay c = new GamePlay(); c.setQuestions(questions); c.setNumRounds(getNumQuestions()); ((CYKApplication)getApplication()).setCurrentGame(c); //Start Game Now.. // i = new Intent(this, QuestionActivity.class); startActivityForResult(i, Constants.PLAYBUTTON); finish(); break; case R.id.rulesBtn : i = new Intent(this, RulesActivity.class); startActivityForResult(i, Constants.RULESBUTTON); finish(); break; case R.id.settingsBtn : i = new Intent(this, SettingsActivity.class); startActivityForResult(i, Constants.SETTINGSBUTTON); finish(); break; case R.id.exitBtn : finish(); break; } }中编辑的行，但无论何时我添加此应用程序都会崩溃。

SplashActivity

Answer 1

可能是你做错了什么。你可以在启动画面中做到这一点

   if(pref.getBoolean("activity_executed", false))
   {
        Log.v("","Before if called");
        setContentView(R.layout.splash_screen);
        Log.v("","after if called");
        new Handler().postDelayed(csRunnable1, 5000);
        pref.edit().putBoolean("activity_executed", true).commit();
   }

或在您的splashactivity oncreate中调用此

getSharedPreferences("ActivityPREF", Context.MODE_PRIVATE).edit().putBoolean("activity_executed", true).commit();

Answer 2

也请在你的SplashActivity中调用它

onCreate(...){
....
SharedPreferences pref;
SharedPreferences.Editor ed;
pref = getSharedPreferences("ActivityPREF", Context.MODE_PRIVATE);
ed = pref.edit();
ed.putBoolean("activity_executed", true);
ed.commit();
....
}

如何在其他活动中设置sharedPreferences的值？

2 个答案: