嗨，在下面的代码中，我正在尝试使用共享的首选项进行一次登录。
为此，我们有三个活动Splashscreen-> Login-> Navigation 假设凭据正确无误，然后我们将重定向到登录屏幕，然后如果下次取消打开应用程序，它将显示导航屏幕。
但是下次它会在启动画面中显示
启动画面：
public class SplashActivity extends AppCompatActivity {
private int TIME_OUT=3000;/*3 seconds*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
getSupportActionBar ().hide ();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Intent intent=new Intent(SplashActivity.this,LoginActivity.class);
startActivity(intent);
finish();
Shared shared=new Shared (getApplicationContext ());
//to change the boolean value as true
shared.secondtime ();
}
},TIME_OUT);
}
}
Shared.java：
public class Shared {
//to create sharedprefences file
SharedPreferences sharedPreferences;
//to edit the sharedprefences file
SharedPreferences.Editor editor;
//context pass the references to another class
Context context;
//mode should be private for sharedpreferences file
int mode=0;
//sharedpreferences file name
String Filename="sdfile";
//store the boolean value with respect to key id
String Data="b";
//create constructor to pass memory at runtime to the sharedfile
public Shared(Context context) {
this.context = context;
sharedPreferences=context.getSharedPreferences (Filename,mode);
editor=sharedPreferences.edit ();
}
//for second time user
public void secondtime(){
editor.putBoolean (Data,true);
editor.commit ();
}
//for first time user
public void firsttime(){
if(!this.login()){
Intent intent=new Intent (context,LoginActivity.class);
intent.setFlags (Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags (Intent.FLAG_ACTIVITY_CLEAR_TASK);
context.startActivity (intent);
}
}
//to get the default values as false
private boolean login(){
return sharedPreferences.getBoolean (Data,false);
}
}