Speak now
Please Wait Image Converting Into Text...
Embark on a journey of knowledge! Take the quiz and earn valuable credits.
Challenge yourself and boost your learning! Start the quiz now to earn credits.
Unlock your potential! Begin the quiz, answer questions, and accumulate credits along the way.
Course Queries Syllabus Queries 2 years ago
Posted on 16 Aug 2022, this text provides information on Syllabus Queries related to Course Queries. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
Turn Your Knowledge into Earnings.
I am working on my major project and I want my button to open different intents based on the string array value obtained. I used if and else if statements inside the OnClickListener of the button but it won't click anymore. Please help me.
This is my XML file:
<android.support.v7.widget.CardView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="5dp" app:cardCornerRadius="3dp" app:cardElevation="2dp"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="@dimen/spacing_large"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="@dimen/spacing_middle" android:text="Syllabus" android:textAppearance="@style/TextAppearance.AppCompat.Title" /> <Button android:id="@+id/buttonpdf" style="@style/Widget.AppCompat.Button" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/colorPrimary" android:text="Open Book" /> LinearLayout>
And this is the Java file for the same activity:
public class ActivityBookDetails extends AppCompatActivity { public static final String EXTRA_OBJCT = "com.app.sample.recipe.OBJ"; private Book book; private FloatingActionButton fab; private View parent_view; Button button; String[] obj; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(activity_book_details); parent_view = findViewById(android.R.id.content); button = (Button)findViewById(R.id.buttonpdf); book = (Book) getIntent().getSerializableExtra(EXTRA_OBJCT); fab = (FloatingActionButton) findViewById(R.id.fab); fabToggle(); REPLY 0 views 0 likes 0 shares Facebook Twitter Linked In WhatsApp
You probably shouldn't try to add conditionals inside the OnClickListener, instead the simplest thing to do would be to move your conditional logic to another method for example.
OnClickListener
@Override public void onClick(View view){ goToNextView(); } private void goToNextView(){ if (title_subjects[0] == "Soft Computing") { Intent intent = new Intent(ActivityBookDetails.this, pdfviewactivity.class); startActivity(intent); } // else if {} // else {} }
As cricket_007 already suggested there are nicer ways than using if/else if statements. If you plan to add a lot more options maybe consider using an enum or map.
public enum Subjects { SOFT_COMPUTING("Soft Computing", pdfviewactivity.class), WEB_ENGINEERING("Web Engineering", pdfweben.class), NETWORK_MANAGEMENT("Wireless Network", pdfnetwork.class), WIRELESS_NETWORK("Network Management", pdfwireless.class); private String name; private Class clazz; Subjects(String name, Class clazz){ this.name = name; this.clazz = clazz; } public static Class getClass(String title_subject) { for(Subjects subject: Subjects.values()) { if (subject.name.equals(title_subject)) { return subject.clazz; } } return null; } } private void goToNextView() { //Alternative to conditionals using Enum Class theClassToGoTo = Subjects.getClass(title_subjects[0]); Intent intent = new Intent(ActivityBookDetails.this, theClassToGoTo); startActivity(intent); //Alternative to conditionals using HashMap Map<String, Class> subject_map = new HashMap<>(); subject_map.put("Soft Computing", pdfviewactivity.class); subject_map.put("Web Engineering", pdfweben.class); subject_map.put("Wireless Network" REPLY 0 views 0 likes 0 shares Facebook Twitter Linked In WhatsApp
No matter what stage you're at in your education or career, TuteeHub will help you reach the next level that you're aiming for. Simply,Choose a subject/topic and get started in self-paced practice sessions to improve your knowledge and scores.
Course Queries 4 Answers
Course Queries 5 Answers
Course Queries 1 Answers
Course Queries 3 Answers
Ready to take your education and career to the next level? Register today and join our growing community of learners and professionals.