title: Runtime imageview is not showing in Launcher activity
body: <p>With the code below my background image is not showing in my launchscreen's activity.
  I have also a thread with a sleep of three seconds but I see only white screen as background. After the delay, I redirect to another activity (in OnStart function).
  Without the redirect I see my image as background.
  How can I see my launchscreen image before I redirect to my second activity?</p>
  
  <p>Thanks in advance for the help.</p>
  
  <pre><code>@Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      mContext = this;
      mAuth = FirebaseAuth.getInstance();
  
              RequestOptions options = new RequestOptions();
              options.centerCrop();
  
              RelativeLayout relativeLayout = new RelativeLayout(mContext);
              RelativeLayout.LayoutParams relLayoutParam = new RelativeLayout.LayoutParams(
                      RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
              imageView = new ImageView(mContext);
              imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
              imageView.setBackgroundResource(R.drawable.launch_screen_image);
              relativeLayout.addView(imageView, relLayoutParam);
  
              setContentView(relativeLayout, relLayoutParam);
              try {
                  Thread.sleep(3000);
              } catch (InterruptedException e) {
                  e.printStackTrace();
              }
          }
  
  }
  
  @Override
  public void onStart() {
      super.onStart();
      // Check if user is signed in (non-null) and update UI accordingly.
      SharedPreferences mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
      FirebaseUser currentUser = mAuth.getCurrentUser();
      if (currentUser != null &amp;&amp; currentUser.getUid() != null
              &amp;&amp; currentUser.getUid().equals(mPrefs.getString("UID", "DEFAULT"))) {
          Intent i = new Intent(mContext, SocialPage.class);
          startActivity(i);
      } else {
          Intent i = new Intent(mContext, Login.class);
          startActivity(i);
      }
  }
  </code></pre>