SharedPreferences导航

// 得到SharedPreferences        SharedPreferences sharedPreferences = getSharedPreferences("xin",                MODE_PRIVATE);        // 给SharedPreferences存个值        boolean boolean1 = sharedPreferences.getBoolean("flag", true);        // 进入判断        if (boolean1) {            viewPager                    .setAdapter(new ViewAdapter(MainActivity.this, al, handler));            Editor edit = sharedPreferences.edit();            edit.putBoolean("flag", false).commit();        } else {            // 如果不符合就跳转            startActivity(new Intent(MainActivity.this, OneActivity.class));        }