Welcome tuto code

app/src/main/java/net/foucry/pilldroid/WelcomeActivity.java

@@ -0,0 +1,202 @@
+package net.foucry.pilldroid;
+
+import android.content.Intent;
+import android.graphics.Color;
+import android.os.Bundle;
+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;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.viewpager.widget.PagerAdapter;
+import androidx.viewpager.widget.ViewPager;
+
+public class WelcomeActivity extends AppCompatActivity {
+
+    private ViewPager viewPager;
+    private LinearLayout dotsLayout;
+    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
+        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+
+        setContentView(R.layout.activity_welcome);
+
+        viewPager = findViewById(R.id.view_pager);
+        dotsLayout = findViewById(R.id.layoutDots);
+        btnSkip = findViewById(R.id.btn_skip);
+        btnNext = findViewById(R.id.btn_next);
+
+
+        // layouts of all welcome sliders
+        // add few more layouts if you want
+        layouts = new int[]{
+                R.layout.welcome1,
+                R.layout.welcome2,
+                R.layout.welcome3,
+                R.layout.welcome4,
+                R.layout.welcome5,
+                R.layout.welcome6,
+                R.layout.welcome7,
+                R.layout.welcome8,
+                R.layout.welcome9,
+                R.layout.welcome10,
+                R.layout.welcome11,
+                R.layout.welcome12};
+
+        // adding bottom dots
+        addBottomDots(0);
+
+        // making notification bar transparent
+        changeStatusBarColor();
+
+        MyViewPagerAdapter 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) {
+        TextView[] 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("∙");
+            //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;
+    }
+
+    void launchHomeScreen() {
+        prefManager.setFirstTimeLaunch(false);
+        startActivity(new Intent(WelcomeActivity.this, MedicamentListActivity.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() {
+        Window window = getWindow();
+        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
+        window.setStatusBarColor(Color.TRANSPARENT);
+    }
+
+    /**
+     * View pager adapter
+     */
+    public class MyViewPagerAdapter extends PagerAdapter {
+
+        public MyViewPagerAdapter() {
+        }
+
+        @Override
+        public Object instantiateItem(ViewGroup container, int position) {
+            //LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+            LayoutInflater layoutInflater = getLayoutInflater();
+
+            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);
+        }
+    }
+}