How to make a smooth image rotation in Android?

AndroidMobile DevelopmentApps/Applications

This example demonstrates how to make a smooth image rotation 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"?>
<LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
   android:id = "@+id/parent"
   xmlns:tools = "http://schemas.android.com/tools"
   android:layout_width = "match_parent"
   android:layout_height = "match_parent"
   tools:context = ".MainActivity"
   android:gravity = "center"
   android:orientation = "vertical">
   <TextView
      android:id = "@+id/text"
      android:textSize = "18sp"
      android:textAlignment = "center"
      android:text = "rorate image"
      android:layout_width = "match_parent"
      android:layout_height = "wrap_content" />
   <ImageView
      android:id = "@+id/rotateImage"
      android:layout_width = "match_parent"
      android:layout_marginTop = "10dp"
      android:layout_height = "wrap_content"
      android:src = "@mipmap/ic_launcher"
      android:layerType = "software" />
</LinearLayout>

In the above code, we have taken a text view and image view. When you click on text view, Image will get rotate in anti clock direction.

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

package com.example.andy.myapplication;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
   int view = R.layout.activity_main;
   TextView text;
   ImageView image;
   @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(view);
      text = findViewById(R.id.text);
      image = findViewById(R.id.rotateImage);
      text.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            RotateAnimation rotate = new RotateAnimation(0, 180, Animation.RELATIVE_TO_SELF, 0.5f,          Animation.RELATIVE_TO_SELF, 0.5f);
            rotate.setDuration(5000);
            rotate.setInterpolator(new LinearInterpolator());
            image.startAnimation(rotate);
         }
      });
}
}

In the above code, we have used Rotate Animation class. it is a predefined class in android. To rotate an image using the below code -

RotateAnimation rotate = new RotateAnimation(0, 180, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
rotate.setDuration(5000);
rotate.setInterpolator(new LinearInterpolator());
image.startAnimation(rotate);

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 code, it shows an initial screen when user clicks on text view, it will rotate the image as shown below -

Click here to download the project code

raja
Published on 30-Jan-2019 14:33:57
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