(CI build may error) Modify TabView to be vertical

app/src/main/java/net/kdt/pojavlaunch/MCLauncherActivity.java

@@ -4,10 +4,9 @@ import android.app.*;
 import android.content.*;
 import android.graphics.*;
 import android.os.*;
-import android.support.design.widget.*;
 import android.support.v4.app.*;
-import android.support.v4.view.*;
 import android.support.v7.app.*;
+import android.text.*;
 import android.util.*;
 import android.view.*;
 import android.widget.*;
@@ -17,6 +16,7 @@ import com.kdt.filerapi.*;
 import java.io.*;
 import java.nio.charset.*;
 import java.util.*;
+import net.kdt.pojavlaunch.launcheruiv3.*;
 import net.kdt.pojavlaunch.mcfragments.*;
 import net.kdt.pojavlaunch.prefs.*;
 import net.kdt.pojavlaunch.util.*;
@@ -26,7 +26,6 @@ import org.lwjgl.glfw.*;
 import android.app.AlertDialog;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
-import android.text.*;
 //import android.support.v7.view.menu.*;
 //import net.zhuoweizhang.boardwalk.downloader.*;
 
@@ -34,8 +33,8 @@ public class MCLauncherActivity extends AppCompatActivity
 {
 	//private FragmentTabHost mTabHost;
 	private LinearLayout fullTab;
-	private ViewPager viewPager;
+	private PojavLauncherViewPager viewPager;
-	private TabLayout tabLayout;
+	private VerticalTabLayout tabLayout;
 
 	private TextView tvVersion, tvUsernameView;
 	private Spinner versionSelector;
@@ -98,9 +97,9 @@ public class MCLauncherActivity extends AppCompatActivity
         setContentView(R.layout.launcher_main_v3);
 		// setContentView(R.layout.launcher_main);
 
-		fullTab = (LinearLayout) findViewById(R.id.launchermainFragmentTabView);
+		fullTab = findViewById(R.id.launchermainFragmentTabView);
-		tabLayout = (TabLayout) findViewById(R.id.launchermainTabLayout);
+		tabLayout = findViewById(R.id.launchermainTabLayout);
-		viewPager = (ViewPager) findViewById(R.id.launchermainTabPager);
+		viewPager = findViewById(R.id.launchermainTabPager);
 
 		consoleView = new ConsoleFragment();
 		crashView = new CrashFragment();

app/src/main/java/net/kdt/pojavlaunch/launcheruiv3/PojavLauncherViewPager.java

@@ -0,0 +1,59 @@
+// Source: https://github.com/TomazWang/TIL-today-i-learned/blob/master/Android/VerticalViewPager.md
+package net.kdt.pojavlaunch.launcheruiv3;
+
+import android.content.*;
+import android.support.v4.view.*;
+import android.util.*;
+import android.view.*;
+
+public class PojavLauncherViewPager extends ViewPager
+{
+    public PojavLauncherViewPager(Context ctx) {
+        this(ctx, null);
+    }
+    
+    public PojavLauncherViewPager(Context ctx, AttributeSet attrs) {
+        super(ctx, attrs);
+        setPageTransformer(true, new VerticalPageTransformer());
+    }
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent ev) {
+
+        boolean interceped = super.onInterceptTouchEvent(swapXY(ev));
+        swapXY(ev); // swap x,y back for other touch events.
+        return interceped;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        return super.onTouchEvent(swapXY(ev));
+    }
+
+    private MotionEvent swapXY(MotionEvent ev) {
+        float width = getWidth();
+        float height = getHeight();
+
+        float newX = (ev.getY() / height) * width;
+        float newY = (ev.getX() / width) * height;
+
+        ev.setLocation(newX, newY);
+
+        return ev;
+    }
+    
+    private class VerticalPageTransformer implements PageTransformer {
+        @Override
+        public void transformPage(View page, float position) {
+            if (position < -1) {
+                page.setVisibility(View.INVISIBLE);
+            } else if (position <= 1) {
+                page.setVisibility(View.VISIBLE);
+
+                page.setTranslationX(page.getWidth() * -position);
+                page.setTranslationY(position * page.getHeight());
+            } else {
+                page.setVisibility(View.INVISIBLE);
+            }
+        }
+    }
+}

app/src/main/res/layout/launcher_main_v3.xml

@@ -18,12 +18,12 @@
 			android:layout_weight="1.0"
 			android:orientation="horizontal">
 
-			<android.support.design.widget.TabLayout
+			<net.kdt.pojavlaunch.launcheruiv3.PojavLauncherTabLayout
 				android:layout_width="wrap_content"
 				android:layout_height="match_parent"
 				android:id="@+id/launchermainTabLayout"/>
 
-			<android.support.v4.view.ViewPager
+			<net.kdt.pojavlaunch.launcheruiv3.PojavLauncherViewPager
 				android:layout_width="0dp"
 				android:layout_height="match_parent"
 				android:layout_weight="1"