Added ability to see images with fullscreen mode

app/build.gradle

@@ -34,4 +34,5 @@ dependencies {
     implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
     implementation 'com.android.support:recyclerview-v7:27.1.1'
     implementation 'com.squareup.picasso:picasso:2.71828'
+    implementation 'com.github.chrisbanes:PhotoView:2.1.4'
 }

app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
     package="ru.volgorobot.vrcatalog">
 
     <uses-permission android:name="android.permission.INTERNET" />
@@ -23,6 +24,9 @@
         </activity>
         <activity android:name=".view.SettingsActivity" />
         <activity android:name=".view.AboutActivity" />
+        <activity
+            android:name=".view.FullScreenImageActivity"
+            android:theme="@style/AppTheme.Fullscreen"/>
         <activity
             android:name=".view.DetailActivity"
             android:theme="@style/ItemActivityTheme"/>

app/src/main/java/ru/volgorobot/vrcatalog/additional/ImagePagerAdapter.java

@@ -1,6 +1,7 @@
 package ru.volgorobot.vrcatalog.additional;
 
 import android.content.Context;
+import android.content.Intent;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.provider.MediaStore;
@@ -16,6 +17,8 @@ import java.io.FileNotFoundException;
 import java.io.IOException;
 
 import ru.volgorobot.vrcatalog.R;
+import ru.volgorobot.vrcatalog.view.DetailActivity;
+import ru.volgorobot.vrcatalog.view.FullScreenImageActivity;
 
 public class ImagePagerAdapter extends PagerAdapter {
     /**
@@ -60,6 +63,14 @@ public class ImagePagerAdapter extends PagerAdapter {
                 .resize(0, 313)
                 .centerCrop()
                 .into(imageView);
+        imageView.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Intent intent = new Intent(context, FullScreenImageActivity.class);
+                intent.putExtra("path", imageUris[position]);
+                context.startActivity(intent);
+            }
+        });
         container.addView(imageView);
 
         return imageView;

app/src/main/java/ru/volgorobot/vrcatalog/view/DetailActivity.java

@@ -139,7 +139,7 @@ public class DetailActivity extends AppCompatActivity implements MainContract.It
     @Override
     public void setViewPagerContent(String[] uris) {
         imagePagerAdapter = new ImagePagerAdapter(DetailActivity.this, uris);
-        TabLayout tabLayout = (TabLayout) findViewById(R.id.tabDots);
+        TabLayout tabLayout = findViewById(R.id.tabDots);
         viewPager.setAdapter(imagePagerAdapter);
         setViewPagerScrollListener();
         tabLayout.setupWithViewPager(viewPager);
@@ -203,37 +203,4 @@ public class DetailActivity extends AppCompatActivity implements MainContract.It
         };
         viewPager.setOnPageChangeListener(listener);
     }
-
-    public static boolean setListViewHeightBasedOnItems(ListView listView) {
-
-        ListAdapter listAdapter = listView.getAdapter();
-        if (listAdapter != null) {
-
-            int numberOfItems = listAdapter.getCount();
-
-            // Get total height of all items.
-            int totalItemsHeight = 0;
-            for (int itemPos = 0; itemPos < numberOfItems; itemPos++) {
-                View item = listAdapter.getView(itemPos, null, listView);
-                item.measure(0, 0);
-                totalItemsHeight += item.getMeasuredHeight();
-            }
-
-            // Get total height of all item dividers.
-            int totalDividersHeight = listView.getDividerHeight() *
-                    (numberOfItems - 1);
-
-            // Set list height.
-            ViewGroup.LayoutParams params = listView.getLayoutParams();
-            params.height = totalItemsHeight + totalDividersHeight;
-            listView.setLayoutParams(params);
-            listView.requestLayout();
-
-            return true;
-
-        } else {
-            return false;
-        }
-
-    }
 }

app/src/main/java/ru/volgorobot/vrcatalog/view/FullScreenImageActivity.java

@@ -0,0 +1,123 @@
+package ru.volgorobot.vrcatalog.view;
+
+import android.graphics.Color;
+import android.graphics.PorterDuff;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.content.ContextCompat;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.Window;
+import android.view.WindowManager;
+import android.view.animation.AccelerateInterpolator;
+import android.view.animation.DecelerateInterpolator;
+import android.widget.ImageView;
+
+import com.github.chrisbanes.photoview.OnPhotoTapListener;
+import com.github.chrisbanes.photoview.PhotoView;
+import com.squareup.picasso.Picasso;
+
+import ru.volgorobot.vrcatalog.R;
+
+public class FullScreenImageActivity extends AppCompatActivity implements View.OnSystemUiVisibilityChangeListener {
+    private Toolbar mToolbar;
+    private boolean mIsFullScreen;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_fullscreenimage);
+
+        mToolbar = findViewById(R.id.toolbar);
+
+        mToolbar.setTitle("");
+
+        if (mToolbar != null) {
+            setSupportActionBar(mToolbar);
+        }
+
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        final Drawable upArrow = ContextCompat.getDrawable(this, R.drawable.abc_ic_ab_back_material);
+        upArrow.setColorFilter(Color.WHITE, PorterDuff.Mode.SRC_ATOP);
+        getSupportActionBar().setHomeAsUpIndicator(upArrow);
+        mToolbar.bringToFront();
+
+        mIsFullScreen = true;
+
+        Window window = getWindow();
+        WindowManager.LayoutParams winParams = window.getAttributes();
+        winParams.flags &= ~WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
+        window.setAttributes(winParams);
+
+        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+                |View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+
+        String path = getIntent().getStringExtra("path");
+
+        PhotoView photoView = (PhotoView) findViewById(R.id.photo_view);
+
+        photoView.setOnPhotoTapListener(new OnPhotoTapListener() {
+            @Override
+            public void onPhotoTap(ImageView view, float x, float y) {
+                updateView();
+            }
+        });
+
+        Picasso.get()
+                .load(path)
+                .into(photoView);
+    }
+
+
+
+    @Override
+    public void onSystemUiVisibilityChange(int visibility) {
+        if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
+            mIsFullScreen = false;
+        }
+
+        updateView();
+    }
+
+    public void updateView() {
+        mIsFullScreen = !mIsFullScreen;
+
+        if (mIsFullScreen) {
+            hideSystemUI();
+        } else {
+            showSystemUI();
+        }
+    }
+
+    private void hideSystemUI() {
+        mToolbar.animate().translationY(-mToolbar.getHeight()).setInterpolator(new AccelerateInterpolator(2)).start();
+    }
+
+    private void showSystemUI() {
+        mToolbar.animate().translationY(0).setInterpolator(new DecelerateInterpolator(2)).start();
+    }
+
+    public int getStatusBarHeight() {
+        int result = 0;
+        int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        if (resourceId > 0) {
+            result = getResources().getDimensionPixelSize(resourceId);
+        }
+        return result;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                finish();
+                return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+}

app/src/main/res/layout/activity_fullscreenimage.xml

@@ -0,0 +1,27 @@
+<?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"
+    android:orientation="vertical"
+    tools:context="ru.volgorobot.vrcatalog.view.FullScreenImageActivity"
+    android:background="@android:color/black">
+
+    <com.github.chrisbanes.photoview.PhotoView
+        android:id="@+id/photo_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <android.support.v7.widget.Toolbar
+        android:id="@+id/toolbar"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:layout_alignParentTop="true"
+        android:background="#33000000"
+        android:fitsSystemWindows="true"
+        android:theme="@style/TransparentActionBar"
+        android:popupTheme="@style/AppTheme.AppBarOverlay" />
+
+</RelativeLayout>

app/src/main/res/values-v21/styles.xml

@@ -5,12 +5,19 @@
         <item name="windowNoTitle">true</item>
         <item name="android:statusBarColor">@android:color/transparent</item>
     </style>
+    <style name="AppTheme.Fullscreen">
+        <item name="android:windowFullscreen">true</item>
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+        <item name="android:windowTranslucentStatus">true</item>
+        <item name="android:windowTranslucentNavigation">true</item>
+    </style>
     <style name="ItemActivityTheme" parent="AppTheme">
         <item name="android:windowTranslucentStatus">true</item>
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>
     </style>
-    <style name="MyActionBar" parent="Widget.AppCompat.ActionBar.Solid">
+    <style name="TransparentActionBar" parent="Widget.AppCompat.ActionBar.Solid">
         <item name="android:background">@android:color/transparent</item>
         <item name="background">@android:color/transparent</item>
     </style>

app/src/main/res/values/styles.xml

@@ -20,5 +20,10 @@
     <style name="ItemActivityTheme" parent="Theme.AppCompat.Light.DarkActionBar">
         <item name="android:windowTranslucentStatus">true</item>
     </style>
+    <style name="AppTheme.Fullscreen">
+        <item name="android:windowFullscreen">true</item>
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
 
 </resources>

build.gradle

@@ -21,6 +21,7 @@ allprojects {
         google()
         jcenter()
         mavenCentral()
+        maven { url "https://jitpack.io" }
     }
 }