Android中判断应用是否第一次打开 闪屏页

@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    date();}private void date() {    SharedPreferences shared = getSharedPreferences("is", MODE_PRIVATE);    boolean isfer = shared.getBoolean("isfer", true);    SharedPreferences.Editor editor = shared.edit();    if (isfer) {        //第一次进入跳转        Intent in = new Intent(WelcomeActivity.this, SplashActivity.class);        startActivity(in);        finish();        editor.putBoolean("isfer", false);        editor.commit();    } else {        //第二次进入跳转        Intent in = new Intent(WelcomeActivity.this, MainActivity.class);        startActivity(in);        finish();    }}