Starting an Android Activity from a static method

Question

I want to start an activity from a static java method on an android device. I do not have any context or anything passed as parameter to the static function. For starting the activity I must call "startActivity" with the current running method as "this" pointer. So is there a way to get the current running activity?

Answer 1

You can access only static variables/objects inside static method. So You need to Implement this way

public class MainActivity extends Activity {
    private static Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;

    }

    public static void goToLoginActivity() {
        Intent login = new Intent(mContext, LoginActivity.class);
        mContext.startActivity(login);
    }

}

NOTE : But this is not the proper way to do so, this may cause window leak issue.

Better approach is pass activity/context object as parameter like this.

public static void goToLoginActivity(Context mContext) {
            Intent login = new Intent(mContext, LoginActivity.class);
            mContext.startActivity(login);
        }