Primary file for using the Cardboard SDK for Android with the stereoscopic A360 web samples

MainActivity.java

package com.autodesk.a360cardboard;

import com.google.vrtoolkit.cardboard.CardboardActivity;

import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.os.Vibrator;
import android.util.Log;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends CardboardActivity {

  private static final String TAG = "A360CardboardActivity";
  private static final int DELAY = 500;

  private Vibrator mVibrator;
  private WebView mWebView;
  private boolean mInModel;
  private boolean mClicked;
  private boolean mHandled;
  private int mClickCount;

  @SuppressLint("SetJavaScriptEnabled")
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mVibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
    mClicked = false;
    mHandled = false;
    mClickCount = 0;

    mWebView = new WebView(this);
    WebSettings settings = mWebView.getSettings();
    settings.setJavaScriptEnabled(true);

    // Enable remote debugging via chrome://inspect

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
      WebView.setWebContentsDebuggingEnabled(true);
    }

    mWebView.setWebViewClient(new WebViewClient() {
      @Override
      public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
      }
    });

    mWebView.loadUrl("http://autode.sk/gvr");

    this.setContentView(mWebView);
  }

  // Called when the Cardboard trigger is pulled.

  @Override
  public void onCardboardTrigger() {
    Log.i(TAG, "onCardboardTrigger");

    // If we're viewing a model, this is a "back" operation

    if (mInModel) {
      back();
      mVibrator.vibrate(70);
    } else {

      // Otherwise we need to check for single- vs. double-click

      if (mClicked) {

        // On double-click we open the selected model

        mClicked = false;
        mHandled = true;
        mVibrator.vibrate(70);
        enter();
      } else {

        // We only know if it's a single-click by checking after
        // a delay to see whether another click came or not

        mClicked = true;
        mHandled = false;

        mWebView.postDelayed(new Runnable() {
          @Override
          public void run() {

            // If nothing was handled advance the selection

            if (!mHandled) {
              down();
              mClickCount++;
              mVibrator.vibrate(50);
            }
            mClicked = false;
          }
        }, DELAY);
      }
    }
  }


  public void down() {
    mWebView.loadUrl("javascript:downButton()");
  }

  public void up() {
    mWebView.loadUrl("javascript:upButton()");
  }

  public void enter() {
    mInModel = true;
    mWebView.loadUrl("javascript:openSelected()");
  }

  public void back() {
    if (mInModel) {
      mInModel = false;
      mWebView.loadUrl("javascript:location.reload()");

      // Select the item that was previously selected based on the number of
      // down clicks since load

      mWebView.postDelayed(new Runnable() {
        @Override
        public void run() {
          mWebView.loadUrl("javascript:selectItemFromClicks(" + mClickCount + ");");
        }
      }, 1000);
    } else {
      System.exit(0);
    }
  }
}