Creating login animation like facebook android

Question

I want to create a login page (Like facebook android app) where the userid and password EditText fields are hidden. A logo is shown on the page which animates above upto a certain distance and stays at the new position and then the edit fields are shown.

Here is something I have tried. But here the logo starts from bottom of the page and travels to the top of the page. Where as I want the logo to start from middle of the page and shift a little up to its new position.

Any idea on how this can be done>?

main.xml

  <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="116dp"
        android:src="@drawable/ic_launcher" />

res/anim/animationfile.xml

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

<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/linear_interpolator" >

<translate
    android:duration="5000"
    android:fromYDelta="50%p"
    android:toYDelta="-50%p" 
   />
     </set>

Main.java

  Animation translatebu= AnimationUtils.loadAnimation(this, R.anim.animationfile);
       // tv.setText("Some text view.");
        img.startAnimation(translatebu);

---

Answer 1

1st The facebook image goes up so you have to translate it from current position to top

<translate
    android:fromYDelta="0%p"
    android:toYDelta="-30%p"
    android:duration="1000" />

Here android:fromYDelta is start position and android:toYDelta is end position in percentage i.e -30% and android:duration is in time i.e. 1 second

2nd Now attach a listener to check when animation is done 3rd Now Fade in your login box

here is the code

MinActivity.java

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button startAnimation =(Button) findViewById(R.id.button1);
        final LinearLayout LoginBox = (LinearLayout) findViewById(R.id.LoginBox);
        LoginBox.setVisibility(View.GONE);
        startAnimation.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                Animation animTranslate  = AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate);
                animTranslate.setAnimationListener(new AnimationListener() {

                    @Override
                    public void onAnimationStart(Animation arg0) { }

                    @Override
                    public void onAnimationRepeat(Animation arg0) { }

                    @Override
                    public void onAnimationEnd(Animation arg0) {
                        LoginBox.setVisibility(View.VISIBLE);
                        Animation animFade  = AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade);
                        LoginBox.startAnimation(animFade);
                    }
                });
                ImageView imgLogo = (ImageView) findViewById(R.id.imageView1);
                imgLogo.startAnimation(animTranslate);

            }
        });

    }

}

And in the anim folder use these xml's

fade.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:interpolator="@android:anim/accelerate_decelerate_interpolator" >
    <alpha
        android:duration="200"
        android:fromAlpha="0.0"
        android:interpolator="@android:anim/accelerate_interpolator"
        android:toAlpha="1.0" />

</set>

translate.xml

<?xml version="1.0" encoding="utf-8"?>
<set
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_decelerate_interpolator"
    android:fillAfter="true">

   <translate
        android:fromYDelta="0%p"
        android:toYDelta="-30%p"
        android:duration="1000" />
</set>

And the layout activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="Start Animation" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:src="@drawable/ic_launcher" />

    <LinearLayout
        android:id="@+id/LoginBox"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:orientation="vertical" >

        <EditText
            android:id="@+id/editText1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Email ID" />

        <EditText
            android:id="@+id/editText2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Password"
            android:inputType="textPassword" />

        <Button
            android:id="@+id/button2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Login" />

    </LinearLayout>

</RelativeLayout>