Android Code doesn't gives the expected output

[Manish Pamnani]

In this project there are no errors whatsover but the OUTPUT of mine
differs from that of the original.

HERE is the original tutorial link:-
https://developer.android.com/training/animation/screen-slide.html

and HERE is my code:-

https://gist.github.com/pamnanaimanish169/3125f456c200430c474c8d1f7690c0b6

Machine Enviornment:- Windows 10(64-bit)

Android emulator:-Nexus 4 API 21

I executed the app and it run successfully and gave the output:-

"my_ouput_screen_slide_new.jpg"

while the expected output is:-

"anim_screenslide_gif.gif"

[Pete Letkeman]

A few quick notes:
1) I did not see "my_ouput_screen_slide_new.jpg", maybe it did not get attached.
2) Your project has more then you have put on GitHub include the "res", "lib" directories and possible more.
3) I would kind of suspect that your output would not be exactly the same as the source code for this project was last update in 2012.
4) Have you downloaded the sample created by Google/Android to see if it produces the same result as your project?

[Pete Letkeman]

I missed this in my previous post, sorry

Welcome to CodeRanch Manish.

I hope that you will find this community knowledgeable, sharing and welcoming.

One more follow up question:
Are you using Android Studio for this project, Eclipse or something else?

[Manish Pamnani]

Pete Letkeman wrote:I missed this in my previous post, sorry

Welcome to CodeRanch Manish.

I hope that you will find this community knowledgeable, sharing and welcoming.

One more follow up question:
Are you using Android Studio for this project, Eclipse or something else?

Thanks for welcoming me!!

I am using Android Studio Version 3.0.1

[Manish Pamnani]

Pete Letkeman wrote:A few quick notes:
1) I did not see "my_ouput_screen_slide_new.jpg", maybe it did not get attached.
2) Your project has more then you have put on GitHub include the "res", "lib" directories and possible more.
3) I would kind of suspect that your output would not be exactly the same as the source code for this project was last update in 2012.
4) Have you downloaded the sample created by Google/Android to see if it produces the same result as your project?

->Here is the "my_output_screen_slide_new.jpg" file:-
https://photos.app.goo.gl/BSSPPTNBArBN6DrF2

->Yes i downloaded the sample provided by the Android/Google, Here is the link to it:-
[urlhttps://github.com/pamnanaimanish169/AnimationsDem02][/url]


->Here is the link to the Github project which includes "res" , "lib":-
https://github.com/pamnanaimanish169/Screen_slide_new

and Thanks for replying!!

[Pete Letkeman]

Okay, there are a few different things occurring here:

1) All of your source Java files should to be in the same directory. So ScreenSlideActivity.java and ScreenSlidePageFragment.java should be in the same location as MainActivity.java.
   Later on when you get into packages you will see how/where files can be moved.
2) ScreenSlideActivity.java and ScreenSlidePageFragment.java do not have Package statements. Package statements should be the first line in the source file with the exception of comments.
3) Your MainActivity does not contain code to load any other activity.
4) All activities need to be registered in AndroidManifest.xml

You can read more about packages here https://docs.oracle.com/javase/tutorial/java/package/index.html.

This tutorial should help you get started with having one activity load another activity https://developer.android.com/training/basics/firstapp/starting-activity.html which should help with points 3 and 4.

[Manish Pamnani]

Pete Letkeman wrote:Okay, there are a few different things occurring here:

1) All of your source Java files should to be in the same directory. So ScreenSlideActivity.java and ScreenSlidePageFragment.java should be in the same location as MainActivity.java.
   Later on when you get into packages you will see how/where files can be moved.
2) ScreenSlideActivity.java and ScreenSlidePageFragment.java do not have Package statements. Package statements should be the first line in the source file with the exception of comments.
3) Your MainActivity does not contain code to load any other activity.
4) All activities need to be registered in AndroidManifest.xml

You can read more about packages here https://docs.oracle.com/javase/tutorial/java/package/index.html.

This tutorial should help you get started with having one activity load another activity https://developer.android.com/training/basics/firstapp/starting-activity.html which should help with points 3 and 4.

Here is the best that i can come upto while following your advice:-

-> i moved all of the .java files into the folder where my MainActivity.java existed, here is the new directory:-

a)Screen_slide_new\app\src\main\java\com\example\manish\screen_slide_new\MainActivity.java
b)Screen_slide_new\app\src\main\java\com\example\manish\screen_slide_new\ScreenSlideActivity.java
c)Screen_slide_new\app\src\main\java\com\example\manish\screen_slide_new\ScreenSlidePageFragment.java

->I imported the package statements in ScreenSlideActivity.java and ScreenSlidePageFragment.java files:-

"ScreenSlideActivity.java":-

package com.example.manish.screen_slide_new;

import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.NavUtils;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuItem;

/**
 * Created by Manish on 01-02-2018.
 */
public class ScreenSlideActivity extends FragmentActivity{
    /**
     * The number of pages (wizard steps) to show in this demo
     */
    private static final int NUM_PAGES = 5;

    /**
     * The pager widget, which handles animation and allows swiping horizontally to access previous
     * and next wizard steps.
     */
    private ViewPager mPager;

    /**
     * The pager adapter, which provides the pages to the view pager widget
     */
    private PagerAdapter mPagerAdapter;

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

        //Instantiate a Viewpager and a PagerAdapter.

        mPager = (ViewPager) findViewById(R.id.pager);
        mPagerAdapter = new ScreenSlidePagerAdapter(getFragmentManager());
        mPager.setAdapter(mPagerAdapter);
        /** You can create custom animation by using "ZoomOutPageTransformer" like this:
         * ViewPager mPager = (ViewPager) findViewById(R.id.pager);
         *  ...
         *  mPager.setPageTransformer(true, new ZoomOutPageTransformer());
         **/
    }

    @Override
    public void onBackPressed() {
        if (mPager.getCurrentItem() == 0) {
            //If the user is currently looking at the first step, allow the system to handle the
            //Back button. This calls finsih() on this activity and pops the back stack.
            super.onBackPressed();
        } else {
            //Otherwise, select the previous step.
            mPager.setCurrentItem(mPager.getCurrentItem() - 1);
        }
    }

    /**
     * A simple pager adapter that represents 5 ScreenSlidePageFragment objects, in
     * sequence.
     */
    private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
        public ScreenSlidePagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            return new ScreenSlidePageFragment.create(position);
        }

        @Override
        public int getCount() {

            return NUM_PAGES;
        }
    }
}

"ScreenSlidePAgeFragment.java":-

package com.example.manish.screen_slide_new;

/**
 * Created by Manish on 01-02-2018.
 */
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class ScreenSlidePageFragment extends Fragment{
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_screen_slide_page, container, false);
        return rootView;
    }
}

->I registered all the activities in ANdroidManifest.xml:
"AndroidManifest.xml":-
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.manish.screen_slide_new">    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".ScreenSlideActivity"            android:parentActivityName=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name=".ScreenSlidePageFragment"            android:parentActivityName=".MainActivity"            >            <intent-filter>                <action android:name="android.intent.action.VIEW"/>                <action android:name="android.intnet.category.DEFAULT"/>            </intent-filter>        </activity>    </application> </manifest>
I solved few of the problems but i can't figure out a way to call one activity from another while using a Fragment(although you provided the link which i appreciate).

Thanks for the help!!

[Pete Letkeman]

Okay Manish you are making some progress, which is good.

Here are a few different paths that you can do next:

Please back up your project before you do anything else.

Path 1
Start a new project leaving the current project as is so that you can come back to it later.

Here are a few different tutorials on how to start a new activity by clicking/pressing a button:

http://hmkcode.com/android-start-another-activity-within-the-same-application/

http://www.androidbegin.com/tutorial/android-button-click-new-activity-example/

http://tekeye.uk/android/examples/starting-a-second-activity

http://www.androiddocs.com/training/basics/firstapp/starting-activity.html

I do not know if any/all of these tutorials work as expected.

Once you are able to create a Android program which only loads another activity then I suggest you look into how to load a fragment.
Here are a few different tutorials on how to start/load a fragment:

http://www.vogella.com/tutorials/AndroidFragments/article.html

http://abhiandroid.com/ui/fragment

http://www.techotopia.com/index.php/Using_Fragments_in_Android_-_A_Worked_Example

https://www.developer.com/ws/android/programming/working-with-fragments-in-android-applications.html

I do not know if any/all of these tutorials work as expected.

Once you know how to load a new activity and how to load a fragment in an that new activity you can then apply that knowledge to your original program.

Path 2
If you only need on activity then you could migrate some (all?) the code from from ScreenSlideActivity.java into MainActivity.java.
Then as soon as your program starts the fragment ScreenSlidePageFragment would load.

Path 3
Download the sample program provided by Google/Android and remove what you do not want

Path 4
Restart at the beginning of the tutorial series found here https://developer.android.com/training/index.html going over everything once again.

Please do not forget to back up your code before making changes to it. This should only take a few minutes to do as you simply need to copy the project files and place them somewhere else.
The total size of this project is most is probably less then five mega bytes so you should have more then enough room on your system for this.

[Manish Pamnani]

Pete Letkeman wrote:Okay Manish you are making some progress, which is good.

Here are a few different paths that you can do next:

Please back up your project before you do anything else.

Path 1
Start a new project leaving the current project as is so that you can come back to it later.

Here are a few different tutorials on how to start a new activity by clicking/pressing a button:

http://hmkcode.com/android-start-another-activity-within-the-same-application/

http://www.androidbegin.com/tutorial/android-button-click-new-activity-example/

http://tekeye.uk/android/examples/starting-a-second-activity

http://www.androiddocs.com/training/basics/firstapp/starting-activity.html

I do not know if any/all of these tutorials work as expected.

Once you are able to create a Android program which only loads another activity then I suggest you look into how to load a fragment.
Here are a few different tutorials on how to start/load a fragment:

http://www.vogella.com/tutorials/AndroidFragments/article.html

http://abhiandroid.com/ui/fragment

http://www.techotopia.com/index.php/Using_Fragments_in_Android_-_A_Worked_Example

https://www.developer.com/ws/android/programming/working-with-fragments-in-android-applications.html

I do not know if any/all of these tutorials work as expected.

Once you know how to load a new activity and how to load a fragment in an that new activity you can then apply that knowledge to your original program.

Path 2
If you only need on activity then you could migrate some (all?) the code from from ScreenSlideActivity.java into MainActivity.java.
Then as soon as your program starts the fragment ScreenSlidePageFragment would load.

Path 3
Download the sample program provided by Google/Android and remove what you do not want

Path 4
Restart at the beginning of the tutorial series found here https://developer.android.com/training/index.html going over everything once again.

Please do not forget to back up your code before making changes to it. This should only take a few minutes to do as you simply need to copy the project files and place them somewhere else.
The total size of this project is most is probably less then five mega bytes so you should have more then enough room on your system for this.

It seems like a lot of work but it also seems to be the prolonged solution that i wished!!
I will definitely look into it!!
And thanks for replying!!

[Pete Letkeman]

Manish Pamnani wrote:It seems like a lot of work but it also seems to be the prolonged solution that i wished!!

You are learning along the way so the next time will be able to complete a task like this quicker.

You only have to choose one path (maybe two), and I provided you with several. I'm not too sure which one will work best for you.

While I (or someone else) could complete the coding for you, here at CodeRanch we generally prefer to have people discover the solution themselves especially for new programmers.
   This is why I've provided you with links to tutorials which help to explain what is happening and how to do things.
   By doing you get more satisfaction and gain the knowledge needed for challenges in the future.

Manish Pamnani wrote:And thanks for replying!!

You are welcome. Remember we all started somewhere and we are all in this journey together.