How do I maintain the ratio of ImageView in Android Studio?

I had a problem creating a SplashScreen. The image, 512x512, imported into the drawable directory does not maintain the same aspect ratio after the code is executed. The height is greater than the width, and manually adjusting works on one device, but on another the problem remains.

SplashActivity Class:

public class SplashScreenActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash_screen);

    ImageView logo = (ImageView) findViewById(R.id.imgLogo);
    logo.setBackgroundResource(R.drawable.robot);
    Animation anim = AnimationUtils.loadAnimation(this, R.anim.move_up);
    logo.setAnimation(anim);

    //Handler: Aplica as mudanças de interface da SplashScreen
    try {

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {

                Intent intent = new Intent(SplashScreenActivity.this,
                        MainActivity.class);

                startActivity(intent);

                SplashScreenActivity.this.finish();
            }
        }, 4000);
    } catch(Exception e){}
}
public void onBackPressed(){
    this.finish();
    super.onBackPressed();
}
 }

Xml from activity:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="@color/colorPrimaryDark">

    <TextView
        android:text="@string/inicializando"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/inicioTexto"
        android:textSize="25sp"
        android:layout_marginBottom="170dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:textColor="#ffffff"/>

    <ProgressBar
        style="?android:attr/progressBarStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/progressBar"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="90dp" />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="315dp"
        app:srcCompat="@drawable/robot"
        android:id="@+id/imgLogo"
        android:layout_above="@+id/inicioTexto"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="26dp"
        android:layout_marginRight="50dp"
        android:layout_marginLeft="50dp"
        android:adjustViewBounds="true"/>

</RelativeLayout>

AndroidManifest

   <application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".SplashScreenActivity"
        android:theme="@style/SplashScreenTheme">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <!--Nova MainActivity criada -->

    <activity android:name=".MainActivity"></activity>
</application>

I must state, that in the preview of the xml the image is in its proportion correct, only in the compilation the error occurs.

Note: I do not think it is necessary, but I will provide the image animation code:

<?xml version="1.0" encoding="utf-8"?>

<translate
    android:duration="900"
    android:fromYDelta="-2000"
    android:toYDelta="0"
    />