want to make some views invisible during runtime in android application

Question

this is my main .xml file :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="5dip"
    >

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"

android:textColor="@color/mbackground1"
android:gravity="center_horizontal"
android:text="@string/decode_label"
android:padding="5dip" 
/>

<TextView
android:id="@+id/mytext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:background="@color/mbackground2" 
android:textColor="@color/mytextcolor" 
android:padding="5dip"
/>


 <TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/continue_label"
android:gravity="center_horizontal"
android:textColor="@color/mytextcolor"
android:padding="5dip"
/>

<Button 
android:id="@+id/webbutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/web_button"
android:textColor="@color/mytextcolor"
/>

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/continue_label1"
android:gravity="center_horizontal"
android:textColor="@color/mytextcolor"
android:padding="5dip"
/>

<Button 
android:id="@+id/callbutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/call_button"
android:textColor="@color/mytextcolor"
/>
<TextView

android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/continue_label2"
android:gravity="center_horizontal"
android:textColor="@color/mytextcolor"
android:padding="5dip"
/>

<Button 
android:id="@+id/emailbutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/sendemail_button"
android:textColor="@color/mytextcolor"
/>

</LinearLayout>

i want that based on output at runtime it should show only one textview and button corresponding to that output. im defining layout in main.xml file and also i am ew in this field.

does any one have any idea. thanks in advance

Answer 1

I assume you know how to get a reference to the views you defined, for example:

Button button = (Button)findViewById(R.id.emailbutton)

You will need to define an id to each and every view you want to use in the code, just like you did to the emailbutton:

android:id="@+id/emailbutton"

In order to set the visibility of a view you call:

button.setVisibility(View.GONE);

you have the option to set the visibility to INVISIBLE and VISIBLE. Then you can play with the visibility as you like. The differnece between INVISIBLE and GONE is that GONE removes the view completely from the layout while INVISIBLE "saves" the space this view takes.

You can see that in the API examples.

Answer 2

To remove yourview in java code:

Button btn=(Button)findViewById(R.id.btn);
btn.setVisibility(View.GONE);

To transparent yourview in java code:

Button btn=(Button)findViewById(R.id.btn);
btn.setVisibility(View.INVISIBLE);

To remove yourview in Xml file:

<yourView
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"/>

To transparent button in Xml file:

<yourView
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="invisible"/>

Answer 3

to make a view visible or invisible try this:

yourView.setVisibility(View.GONE);
yourView.setVisibility(View.VISIBLE);