CODEWITHSUNDEEP
android
Cheok Yan Cheng
Cheok Yan Cheng

Reputation: 42690

Start a new Activity and get its result, through a non Activity class

Usually, in order to launch a new Activity and get its result, from an Activity class, I will use

public void startActivityForResult (Intent intent, int requestCode)

However, what if I try to launch a new Activity and get its result, from a non-Activity class? How I can achieve this?

The reason I ask so as I am currently having LoginManager class (A non-Activity class). It is having the following code.

    accountManager.getAccountManager().getAuthToken(account, AUTH_TOKEN_TYPE, true, new AccountManagerCallback<Bundle>() {
        public void run(AccountManagerFuture<Bundle> future) {
            try {
                Bundle bundle = future.getResult();
                if (bundle.containsKey(AccountManager.KEY_INTENT)) {
                    Intent intent = bundle.getParcelable(AccountManager.KEY_INTENT);
                    intent.setFlags(intent.getFlags() & ~Intent.FLAG_ACTIVITY_NEW_TASK);
                    // Compilation error, as LoginManager doesn't have startActivityForResult method.
                    startActivityForResult(intent, REQUEST_AUTHENTICATE);

Upvotes: 0

Views: 2594

Answers (3)

madborn
madborn

Reputation: 504

Perhaps you could just send a reference to your Context into the LoginManager class and use it to start the Activity?

Upvotes: 0

Vipul
Vipul

Reputation: 28093

((Activity) mContext).startActivityForResult(.....) will do the trick.

But results will be delivered to the actual activity holding the context.

You can apply following Approach

Create single argument constructor in LoginManager class like follows.

class LoginManager
{
  private Context mContext; 
  LoginManager(Context mContext)
  {
    this.mContext=mContext;
  }
  .............................
  //Then whenever you want to call method call like this.

  ((Activity) mContext).startActivityForResult(.....)

}

Now in Activity class whenever you will create Object of LoginManager class create as follows.

LoginManager loginManager=new LoginManager(ActivityName.this);

Upvotes: 3

WindyB
WindyB

Reputation: 786

I would have the Activities within your project extend some kind of a "BaseActivity". Within that base activity, I would override onActivityResult() and pass the result into the LoginManager from there.

This will have the consequence of making all of your Activities pass their results to your LoginManager, so you won't have to keep overriding onActivityResult manually everywhere.

Upvotes: 0

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