How to make the textview blinking in android?

AndroidApps/ApplicationsMobile Development

This example demonstrate about how to make the textview blinking in android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version = "1.0" encoding = "utf-8"?>
<RelativeLayout
   xmlns:android = "http://schemas.android.com/apk/res/android"
   xmlns:tools = "http://schemas.android.com/tools"
   android:layout_width = "match_parent"
   android:gravity = "center"
   android:layout_height = "match_parent">
   <TextView
      android:id = "@+id/text"
      android:textSize = "20dp"
      android:textAlignment = "center"
      android:layout_width = "match_parent"
      android:text = "Text blinking animation"
      android:layout_height = "wrap_content" />
</RelativeLayout>

In the above code, we have taken one text view to show blinking animation.

Step 3 − Add the following code to src/MainActivity.java

package com.example.andy.myapplication;

import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      blinkTextView();
   }
   private void blinkTextView() {
      final Handler handler = new Handler();
      new Thread(new Runnable() {
         @Override
         public void run() {
            int timeToBlink = 1000;
            try{Thread.sleep(timeToBlink);}catch (Exception e) {}
            handler.post(new Runnable() {
               @Override
               public void run() {
                  TextView txt = findViewById(R.id.text);
                  if(txt.getVisibility() = = View.VISIBLE){
                     txt.setVisibility(View.INVISIBLE);
                  } else {
                     txt.setVisibility(View.VISIBLE);
                  }
                  blinkTextView();
               }
            });
         }
      }).start();
   }
}

To provide blink animation to text view use the following code -

private void blinkTextView() {
   final Handler handler = new Handler();
   new Thread(new Runnable() {
      @Override
      public void run() {
         int timeToBlink = 1000;
         try{Thread.sleep(timeToBlink);}catch (Exception e) {}
         handler.post(new Runnable() {
            @Override
            public void run() {
               TextView txt = findViewById(R.id.text);
               if(txt.getVisibility() = = View.VISIBLE) {
                  txt.setVisibility(View.INVISIBLE);
               } else {
                  txt.setVisibility(View.VISIBLE);
               }
               blinkTextView();
            }
         });
      }
   }).start();
}

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run   icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

 


In the above result, text view is going to blink using show and hide of view.

Click here to download the project code

raja
Published on 31-Jan-2019 07:10:54
Advertisements