java - 将 boolean 值传递给上一个 Activity 并在 Android Java 中验证 boolean 值

Question

我想讨论一个关于验证 boolean 值以执行 Activity 的不同操作的问题。我应该使用 SharedPreferences 来实现该功能吗？作为一个新手，我想知道哪种方法可以很好地处理我的案例。非常感谢。

上一个 Activity :

Boolean isLogged = false; //verify needs to log on or not
............
//include Google Map Fragment
btnInsure.setOnClickListener(new View.OnClickListener(){

            public void onClick (View view){
                if(countryCode == null) {
                    Snackbar.make(findViewById(R.id.parentLayout),"Please select a country to continue.", Snackbar.LENGTH_LONG).show();
                } else {
                    if(isLogged){ //if true and go to the page which skipped login page
                        Intent intentLogged = new Intent(map_travel.this, travel_trip.class);
                        intentLogged.putExtra("country code", countryCode);
                        Log.e("country code:", String.valueOf(countryCode));
                        startActivity(intentLogged);
                    } else { //go to login page first
                        Intent intent = new Intent(map_travel.this, travel_login.class);
                        intent.putExtra("country code", countryCode);
                        intent.putExtra("country name", CountryName);
                        Log.e("country code:", String.valueOf(countryCode));
                        Log.e("country name:", String.valueOf(CountryName));
                        startActivity(intent);
                    }


            }
});
......

单击按钮将转到上一个 Activity :

Boolean isLogged = true; //Logged
......
btn_changeCountry.setOnClickListener(new View.OnClickListener(){
        public void onClick(View view){
            currentInsureCountry = null;
            Intent intentChooseCountry = new Intent(travel_trip.this, map_travel.class);
            intentChooseCountry.putExtra("logged", isLogged);
            startActivity(intentChooseCountry);
        }
    });
......

再次为我的愚蠢问题道歉。我正在努力编写更快乐的代码。

Answer 1

Activity A:

  Intent intent=new Intent(A.this,B.class);  
      startActivityForResult(intent, 2);

@Override  
   protected void onActivityResult(int requestCode, int resultCode, Intent data)  
   {  
             super.onActivityResult(requestCode, resultCode, data);  
              // check if the request code is same as what is passed  
               if(requestCode==2)  
                     {  
                        boolean flag=data.getStringExtra("MESSAGE");   

                     }  
 } 

Activity B:

 boolean flag = true;  
                Intent intent=new Intent();  
                intent.putExtra("MESSAGE",flag);  
                setResult(2,intent);  
                finish();