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TextSwitcher
A TextSwitcher is a specialized ViewSwitcher that contains only children of type TextView. A TextSwitcher is useful to animate a label on screen. Whenever setText(CharSequence) is called, TextSwitcher animates the current text out and animates the new text in.
To learn Basic of Android Animation go to Android Animation Basics
Two types animations are required for for TextSwitcher to switch between the texts.
1: In Animation: with which Text come in the Screen.
2: Out Animation: with which Text goes out from the Screen.
As you can see in below image that current Text is going OUT and Next Text is Coming In
What we Need:
We need to set the in and out Animation type of TextSwitcher like...mSwitcher.setInAnimation(in);
mSwitcher.setOutAnimation(out);
In Example, I have a TextSwitcher and a button called "NEXT" , when user clickes on NEXT button TextSwitcher will switch between texts . The current Text will go OUT and next Text will come in with specified Animation.
TextSwitcher Example :
In this Example I have following layout
when user clickes on NEXT button TextSwitcher will switch between texts . The current Text will go OUT and next Text will come in with specified Animation.
example_layout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextSwitcher
android:layout_marginTop="50dp"
android:id="@+id/textSwitcher"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal" />
<Button
android:id="@+id/buttonNext"
android:layout_marginTop="150dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="NEXT"
/>
</LinearLayout>
Text SwitcherExampleActivity.java
public class MainActivity extends Activity
{
private TextSwitcher mSwitcher;
Button btnNext;
// Array of String to Show In TextSwitcher
String textToShow[]={"Main HeadLine","Your Message","New In Technology","New Articles","Business News","What IS New"};
int messageCount=textToShow.length;
// to keep current Index of text
int currentIndex=-1;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.example_layout);
// get The references
btnNext=(Button)findViewById(R.id.buttonNext);
mSwitcher = (TextSwitcher) findViewById(R.id.textSwitcher);
// Set the ViewFactory of the TextSwitcher that will create TextView object when asked
mSwitcher.setFactory(new ViewFactory() {
public View makeView() {
// TODO Auto-generated method stub
// create new textView and set the properties like clolr, size etc
TextView myText = new TextView(MainActivity.this);
myText.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);
myText.setTextSize(36);
myText.setTextColor(Color.BLUE);
return myText;
}
});
// Declare the in and out animations and initialize them
Animation in = AnimationUtils.loadAnimation(this,android.R.anim.slide_in_left);
Animation out = AnimationUtils.loadAnimation(this,android.R.anim.slide_out_right);
// set the animation type of textSwitcher
mSwitcher.setInAnimation(in);
mSwitcher.setOutAnimation(out);
// ClickListener for NEXT button
// When clicked on Button TextSwitcher will switch between texts
// The current Text will go OUT and next text will come in with specified animation
btnNext.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
currentIndex++;
// If index reaches maximum reset it
if(currentIndex==messageCount)
currentIndex=0;
mSwitcher.setText(textToShow[currentIndex]);
}
});
}
}
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Beginning With Android
Android : Introduction(What is Android) Configuring Eclipse for Android Development
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Advance Android Topics Customizing Android Views
Working With Layouts Working With Views
Understanding Layouts in Android Using Buttons and EditText in Android
Working with Linear Layout (With Example) Using CheckBoxes in Android
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Relative Layout In Android ListView
Table Layout Android ProgressBar
Frame Layout(With Example) Customizing ProgressBar
Absolute Layout Customizing Radio Buttons
Grid Layout Customizing Checkboxes In Android
Android Components Dialogs In Android
Activity In Android Working With Alert Dialog
Activity Life Cycle Adding Radio Buttons In Dialog
Starting Activity For Result Adding Check Boxes In Dialog
Sending Data from One Activity to Other in Android Creating Customized Dialogs in Android
Returning Result from Activity Creating Dialog To Collect User Input
Android : Service DatePicker and TimePickerDialog
BroadcastReceiver Using TimePickerDialog and DatePickerDialog In android
Menus In Android ListView:
Creating Option Menu Populating ListView With DataBase
Creating Context Menu In Android Populating ListView with ArrayList
ListView with Custom Adapter
Toast Working With SMS
Customizing Toast In Android How to Send SMS in Android
Customizing the Display Time of Toast How To Receive SMS
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How to Forward an Incoming Call In Android Creating Table In Android
CALL States In Android Inserting, Deleting and Updating Records In Table in Android
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Sending Email In Android
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Prompt User Input with an AlertDialog
the app is crashed after reaching the limit
ReplyDeleteHow to implement back button to see previous text?
ReplyDeletenice example! thanks
ReplyDeleteanimation is not working
ReplyDeletecan you tell me