Animation Assignment

//-------------- strings.xml -----------------------

<resources>
    <string name="app_name">Animation Project</string>
    <string name="my_walker">My Walker</string>
    <string name="bye_walker">Bye Bye!</string>
    <string name="go">Go!</string>
    <string name="animation">animation</string>
</resources>

//----------------- simple_animation.xml ---------------------

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/a1" android:duration="100" />
    <item android:drawable="@drawable/a2" android:duration="100" />
    <item android:drawable="@drawable/a3" android:duration="100" />
    <item android:drawable="@drawable/a4" android:duration="100" />
    <item android:drawable="@drawable/a5" android:duration="100" />
    <item android:drawable="@drawable/a6" android:duration="100" />
    <item android:drawable="@drawable/a7" android:duration="100" />
    <item android:drawable="@drawable/a8" android:duration="100" />
    <item android:drawable="@drawable/a9" android:duration="100" />
    <item android:drawable="@drawable/a10" android:duration="100" />
    <item android:drawable="@drawable/a11" android:duration="100" />
    <item android:drawable="@drawable/a12" android:duration="100" />
    <item android:drawable="@drawable/a13" android:duration="100" />
    <item android:drawable="@drawable/a14" android:duration="100" />
    <item android:drawable="@drawable/a15" android:duration="100" />
    <item android:drawable="@drawable/a16" android:duration="100" />
    <item android:drawable="@drawable/a17" android:duration="100" />
    <item android:drawable="@drawable/a18" android:duration="100" />
    <item android:drawable="@drawable/a19" android:duration="100" />
    <item android:drawable="@drawable/a20" android:duration="100" />
    <item android:drawable="@drawable/a21" android:duration="100" />
    <item android:drawable="@drawable/a22" android:duration="100" />
    <item android:drawable="@drawable/a23" android:duration="100" />
    <item android:drawable="@drawable/a24" android:duration="100" />
</animation-list>

//---------------------- animate.xml ----------------------------------

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="5000"
        android:fromXDelta="80%p"
        android:toXDelta="-5%p" />

    <scale
        android:duration="1000"
        android:fromXScale="1"
        android:fromYScale="1"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="-1"
        android:toYScale="1"
        android:startOffset="4000" />

    <translate
        android:duration="5000"
        android:fromXDelta="-5%p"
        android:toXDelta="120%p"
        android:startOffset="5000" />
</set>

//------------------------- activity_main.xml ----------------------------

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="32sp"
            android:gravity="center"
            android:layout_marginTop="50dp"
            android:text="@string/my_walker" />

        <TextView
            android:id="@+id/bye"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="44sp"
            android:gravity="center"
            android:layout_marginTop="50dp"
            android:textColor="@color/colorPrimary"
            android:text="@string/bye_walker" />

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:layout_marginTop="100dp"
            android:layout_gravity="start"
            android:contentDescription="@string/animation"

            app:srcCompat="@drawable/simple_animation" />

        <Button
            android:id="@+id/btnRun"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="28sp"
            android:layout_margin="40dp"
            style="@style/Widget.AppCompat.Button.Colored"
            android:layout_marginBottom="50dp"
            android:text="@string/go" />
    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

// ------------------------ MainActivity.java ------------------------

package com.sgl.animationproject;

import androidx.annotation.InterpolatorRes;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.graphics.Interpolator;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements Animation.AnimationListener {

    ImageView imageView;
    Context context;
    AnimationDrawable animationDrawable;
    AnimationDrawable textDrawable;
    TextView textView;
    Animation animation;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setPointer();
    }

    private void setPointer() {
        this.context = this;
        imageView = findViewById(R.id.imageView);
        textView = findViewById(R.id.bye);
        animationDrawable = (AnimationDrawable)imageView.getDrawable();
        textView.setVisibility(View.INVISIBLE);
        imageView.setVisibility(View.INVISIBLE);

        findViewById(R.id.btnRun).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                imageView.setVisibility(View.INVISIBLE);
                animationDrawable.start();

                imageView.startAnimation(animation);
            }
        });
        animation = AnimationUtils.loadAnimation(context, R.anim.animate);
        animation.setAnimationListener(this);
    }

    @Override
    public void onAnimationStart(Animation animation) {
        Toast.makeText(context, "Animation Started", Toast.LENGTH_LONG).show();
    }

    @Override
    public void onAnimationEnd(Animation animation) {
        textView.setVisibility(View.VISIBLE);
        AlphaAnimation fadeIn = new AlphaAnimation(0.0f, 1.0f);
//        AlphaAnimation fadeOut = new AlphaAnimation(1.0f, 0.0f);
        textView.startAnimation(fadeIn);
        fadeIn.setDuration(1200);
        fadeIn.setFillAfter(true);
        Toast.makeText(context, "Animation Ended", Toast.LENGTH_LONG).show();
    }

    @Override
    public void onAnimationRepeat(Animation animation) {

    }
}