ساخت اسلایدر ورود به برنامه برای اندروید

 import android.content.Context;
import android.content.SharedPreferences;/**
* Created by jfp on 05/05/16.
*/
public class PrefManager {
SharedPreferences pref;
SharedPreferences.Editor editor;
Context _context;// shared pref mode
int PRIVATE_MODE = 0;// Shared preferences file name
private static final String PREF_NAME = "androidhive-welcome";private static final String IS_FIRST_TIME_LAUNCH = "IsFirstTimeLaunch";
public PrefManager(Context context) {
this._context = context;
pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
editor = pref.edit();
}
public void setFirstTimeLaunch(boolean isFirstTime) {
editor.putBoolean(IS_FIRST_TIME_LAUNCH, isFirstTime);
editor.commit();
}
public boolean isFirstTimeLaunch() {
return pref.getBoolean(IS_FIRST_TIME_LAUNCH, true);
}
}

<?xmlversion="1.0"encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/bg_screen2">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center_horizontal"
android:orientation="vertical">
<ImageView
android:layout_width="@dimen/img_width_height"
android:layout_height="@dimen/img_width_height"
android:src="@drawable/ic_movie"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/slide_2_title"
android:textColor="@android:color/white"
android:textSize="@dimen/slide_title"
android:textStyle="bold"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:paddingLeft="@dimen/desc_padding"
android:paddingRight="@dimen/desc_padding"
android:text="@string/slide_2_desc"
android:textAlignment="center"
android:textColor="@android:color/white"
android:textSize="@dimen/slide_desc"/>
</LinearLayout>
</RelativeLayout>

<?xmlversion="1.0"encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/bg_screen3">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center_horizontal"
android:orientation="vertical">
<ImageView
android:layout_width="@dimen/img_width_height"
android:layout_height="@dimen/img_width_height"
android:src="@drawable/ic_discount"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/slide_3_title"
android:textColor="@android:color/white"
android:textSize="@dimen/slide_title"
android:textStyle="bold"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:paddingLeft="@dimen/desc_padding"
android:paddingRight="@dimen/desc_padding"
android:text="@string/slide_3_desc"
android:textAlignment="center"
android:textColor="@android:color/white"
android:textSize="@dimen/slide_desc"/>
</LinearLayout>
</RelativeLayout>

<?xmlversion="1.0"encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/bg_screen4">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center_horizontal"
android:orientation="vertical">
<ImageView
android:layout_width="@dimen/img_width_height"
android:layout_height="@dimen/img_width_height"
android:src="@drawable/ic_travel"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/slide_4_title"
android:textColor="@android:color/white"
android:textSize="@dimen/slide_title"
android:textStyle="bold"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:paddingLeft="@dimen/desc_padding"
android:paddingRight="@dimen/desc_padding"
android:text="@string/slide_4_desc"
android:textAlignment="center"
android:textColor="@android:color/white"
android:textSize="@dimen/slide_desc"/>
</LinearLayout>
</RelativeLayout>

<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:showIn="@layout/activity_welcome"><android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent" /><LinearLayout
android:id="@+id/layoutDots"
android:layout_width="match_parent"
android:layout_height="@dimen/dots_height"
android:layout_alignParentBottom="true"
android:layout_marginBottom="@dimen/dots_margin_bottom"
android:gravity="center"
android:orientation="horizontal"></LinearLayout><View
android:layout_width="match_parent"
android:layout_height="1dp"
android:alpha=".5"
android:layout_above="@id/layoutDots"
android:background="@android:color/white" /><Button
android:id="@+id/btn_next"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="@null"
android:text="@string/next"
android:textColor="@android:color/white" /><Button
android:id="@+id/btn_skip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:background="@null"
android:text="@string/skip"
android:textColor="@android:color/white" /></RelativeLayout>

import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
public class WelcomeActivity extends AppCompatActivity {
    private ViewPager viewPager;
    private MyViewPagerAdapter myViewPagerAdapter;
    private LinearLayout dotsLayout;
    private TextView[] dots;
    private int[] layouts;
    private Button btnSkip, btnNext;
    private PrefManager prefManager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Checking for first time launch - before calling setContentView()
        prefManager = new PrefManager(this);
        if (!prefManager.isFirstTimeLaunch()) {
            launchHomeScreen();
            finish();
        }
        // Making notification bar transparent
        if (Build.VERSION.SDK_INT >= 21) {
            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
        }
        setContentView(R.layout.activity_welcome);
        viewPager = (ViewPager) findViewById(R.id.view_pager);
        dotsLayout = (LinearLayout) findViewById(R.id.layoutDots);
        btnSkip = (Button) findViewById(R.id.btn_skip);
        btnNext = (Button) findViewById(R.id.btn_next);
        // layouts of all welcome sliders
        // add few more layouts if you want
        layouts = new int[]{
                R.layout.welcome_slide1,
                R.layout.welcome_slide2,
                R.layout.welcome_slide3,
                R.layout.welcome_slide4};
        // adding bottom dots
        addBottomDots(0);
        // making notification bar transparent
        changeStatusBarColor();
        myViewPagerAdapter = new MyViewPagerAdapter();
        viewPager.setAdapter(myViewPagerAdapter);
        viewPager.addOnPageChangeListener(viewPagerPageChangeListener);
        btnSkip.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                launchHomeScreen();
            }
        });
        btnNext.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // checking for last page
                // if last page home screen will be launched
                int current = getItem(+1);
                if (current < layouts.length) {
                    // move to next screen
                    viewPager.setCurrentItem(current);
                } else {
                    launchHomeScreen();
                }
            }
        });
    }
    private void addBottomDots(int currentPage) {
        dots = new TextView[layouts.length];
        int[] colorsActive = getResources().getIntArray(R.array.array_dot_active);
        int[] colorsInactive = getResources().getIntArray(R.array.array_dot_inactive);
        dotsLayout.removeAllViews();
        for (int i = 0; i < dots.length; i++) {
            dots[i] = new TextView(this);
            dots[i].setText(Html.fromHtml("&#8226;"));
            dots[i].setTextSize(35);
            dots[i].setTextColor(colorsInactive[currentPage]);
            dotsLayout.addView(dots[i]);
        }
        if (dots.length > 0)
            dots[currentPage].setTextColor(colorsActive[currentPage]);
    }
    private int getItem(int i) {
        return viewPager.getCurrentItem() + i;
    }
    private void launchHomeScreen() {
        prefManager.setFirstTimeLaunch(false);
        startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
        finish();
    }
    //	viewpager change listener
    ViewPager.OnPageChangeListener viewPagerPageChangeListener = new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageSelected(int position) {
            addBottomDots(position);
            // changing the next button text 'NEXT' / 'GOT IT'
            if (position == layouts.length - 1) {
                // last page. make button text to GOT IT
                btnNext.setText(getString(R.string.start));
                btnSkip.setVisibility(View.GONE);
            } else {
                // still pages are left
                btnNext.setText(getString(R.string.next));
                btnSkip.setVisibility(View.VISIBLE);
            }
        }
        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2) {
        }
        @Override
        public void onPageScrollStateChanged(int arg0) {
        }
    };
    /**
     * Making notification bar transparent
     */
    private void changeStatusBarColor() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = getWindow();
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.TRANSPARENT);
        }
    }
    /**
     * View pager adapter
     */
    public class MyViewPagerAdapter extends PagerAdapter {
        private LayoutInflater layoutInflater;
        public MyViewPagerAdapter() {
        }
        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View view = layoutInflater.inflate(layouts[position], container, false);
            container.addView(view);
            return view;
        }
        @Override
        public int getCount() {
            return layouts.length;
        }
        @Override
        public boolean isViewFromObject(View view, Object obj) {
            return view == obj;
        }
        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            View view = (View) object;
            container.removeView(view);
        }
    }
}

و بخش androidmanifest را همانند زیر تکمیل می کنیم.