Android Create Article Stepper

Android Create Article Stepper


1. Project Structure


2. Gradle

plugins {
  id 'com.android.application'
}

android {
  compileSdkVersion 30
  buildToolsVersion "30.0.3"

  defaultConfig {
    applicationId "com.article.stepper"
    minSdkVersion 19
    targetSdkVersion 30
    versionCode 1
    versionName "1.0"

    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
  }

  buildTypes {
    release {
      minifyEnabled false
      proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
  }
  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }
}

dependencies {
  implementation 'com.balysv:material-ripple:1.0.2'
  implementation 'androidx.appcompat:appcompat:1.3.0'
  implementation 'com.google.android.material:material:1.4.0'
  implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
  testImplementation 'junit:junit:4.+'
  androidTestImplementation 'androidx.test.ext:junit:1.1.3'
  androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

  implementation 'com.mikhaellopez:circularimageview:3.2.0'
}


3. Gradle Properties

android.enableJetifier=true


4. Main Activity

package com.article.stepper;

import android.app.Dialog;
import android.content.Context;
import android.graphics.PorterDuff;
import android.os.Bundle;
import androidx.viewpager.widget.PagerAdapter;
import androidx.viewpager.widget.ViewPager;
import androidx.appcompat.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.article.stepper.utils.Tools;

public class MainActivity extends AppCompatActivity {

  private static final int MAX_STEP = 4;

  private ViewPager viewPager;
  private MyViewPagerAdapter myViewPagerAdapter;

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

    // adding bottom dots
    bottomProgressDots(0);

    initComponent();

    Tools.setSystemBarColor(this, R.color.grey_5);
    Tools.setSystemBarLight(this);
  }

  private void bottomProgressDots(int current_index) {
    LinearLayout dotsLayout = (LinearLayout) findViewById(R.id.layoutDots);
    ImageView[] dots = new ImageView[MAX_STEP];

    dotsLayout.removeAllViews();
    for (int i = 0; i < dots.length; i++) {
      dots[i] = new ImageView(this);
      int width_height = 10;
      LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(width_height, width_height));
      params.setMargins(10, 10, 10, 10);
      dots[i].setLayoutParams(params);
      dots[i].setImageResource(R.drawable.shape_circle);
      dots[i].setColorFilter(getResources().getColor(R.color.grey_20), PorterDuff.Mode.SRC_IN);
      dotsLayout.addView(dots[i]);
    }

    if (dots.length > 0) {
      dots[current_index].setImageResource(R.drawable.shape_circle);
      dots[current_index].setColorFilter(getResources().getColor(R.color.grey_80), PorterDuff.Mode.SRC_IN);
    }
  }


  private void initComponent() {
    viewPager = (ViewPager) findViewById(R.id.view_pager);
    myViewPagerAdapter = new MyViewPagerAdapter();
    viewPager.setAdapter(myViewPagerAdapter);
    viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
      @Override
      public void onPageSelected(int position) {
        super.onPageSelected(position);
        bottomProgressDots(position);
      }
    });

    ((ImageButton) findViewById(R.id.bt_comments)).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        showCommentsDialog();
      }
    });
    ((ImageButton) findViewById(R.id.bt_back)).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        onBackPressed();
      }
    });
  }

  private void showCommentsDialog() {
    final Dialog dialog = new Dialog(this, R.style.BaseTheme);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); // before
    Tools.setSystemBarColorDialog(this, dialog, R.color.grey_5);
    Tools.setSystemBarLightDialog(dialog);
    dialog.setContentView(R.layout.dialog_article_comments);
    dialog.setCancelable(true);

    WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
    lp.copyFrom(dialog.getWindow().getAttributes());
    lp.width = WindowManager.LayoutParams.MATCH_PARENT;
    lp.height = WindowManager.LayoutParams.MATCH_PARENT;

    ((ImageButton) dialog.findViewById(R.id.bt_close)).setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        dialog.dismiss();
      }
    });

    dialog.show();
    dialog.getWindow().setAttributes(lp);
  }

  /**
   * 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(R.layout.item_article_stepper, container, false);
      TextView text = (TextView) view.findViewById(R.id.text);
      if (position > 0) {
        text.setVisibility(View.VISIBLE);
        (view.findViewById(R.id.lyt_article_cover)).setVisibility(View.GONE);
        if (position % 2 == 0) {
          text.setText(R.string.long_lorem_ipsum_2);
        } else {
          text.setText(R.string.long_lorem_ipsum);
        }
      }
      container.addView(view);
      return view;
    }

    @Override
    public int getCount() {
      return MAX_STEP;
    }

    @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);
    }
  }
}


5. Layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@color/grey_5"
  android:orientation="vertical">

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

    <RelativeLayout
      android:layout_width="match_parent"
      android:layout_height="0dp"
      android:layout_weight="1">

      <androidx.viewpager.widget.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

      <View
        android:layout_width="match_parent"
        android:layout_height="@dimen/spacing_medium"
        android:layout_alignParentBottom="true"
        android:background="@drawable/bg_gradient_very_soft" />

    </RelativeLayout>

    <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true"
      android:background="@color/grey_3"
      android:orientation="horizontal">

      <ImageButton
        android:id="@+id/bt_back"
        android:layout_width="?android:attr/actionBarSize"
        android:layout_height="?android:attr/actionBarSize"
        android:background="?attr/selectableItemBackgroundBorderless"
        android:tint="@color/grey_60"
        app:srcCompat="@drawable/ic_arrow_back" />

      <LinearLayout
        android:id="@+id/layoutDots"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="horizontal" />

      <ImageButton
        android:id="@+id/bt_comments"
        android:layout_width="?android:attr/actionBarSize"
        android:layout_height="?android:attr/actionBarSize"
        android:background="?attr/selectableItemBackgroundBorderless"
        android:tint="@color/grey_60"
        app:srcCompat="@drawable/ic_chat_outline" />

    </LinearLayout>

  </LinearLayout>

</LinearLayout>


6. Value

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:ns1="urn:oasis:names:tc:xliff:document:1.2">

  <style name="Base.TextAppearance.AppCompat.Subhead" parent="android:TextAppearance.Material.Subhead"/>
  <style name="TextAppearance.AppCompat.Body1" parent="Base.TextAppearance.AppCompat.Body1"/>
  <style name="TextAppearance.AppCompat.Body2" parent="Base.TextAppearance.AppCompat.Body2"/>
  <style name="TextAppearance.AppCompat.Small" parent="Base.TextAppearance.AppCompat.Small"/>
  <style name="TextAppearance.AppCompat.Medium" parent="Base.TextAppearance.AppCompat.Medium"/>
  <style name="TextAppearance.AppCompat.Subhead" parent="Base.TextAppearance.AppCompat.Subhead"/>

  <color name="grey_3">#f7f7f7</color>
  <color name="grey_5">#f2f2f2</color>
  <color name="grey_10">#e6e6e6</color>
  <color name="grey_20">#cccccc</color>
  <color name="grey_40">#999999</color>
  <color name="grey_60">#666666</color>
  <color name="grey_80">#37474F</color>

</resources>