How to put if statement inside button's OnClickListener in Android

manpreet Best Answer 2 years ago

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();
                                                    

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