How to use

PresentationActivity$DemoPresentation

in

com.example.android.apis.app

/**
 * Shows a {@link Presentation} on the specified display.
 */
private void showPresentation(Display display, DemoPresentationContents contents) {
  final int displayId = display.getDisplayId();
  if (mActivePresentations.get(displayId) != null) {
    return;
  }
  Log.d(TAG, "Showing presentation photo #" + contents.photo
      + " on display #" + displayId + ".");
  DemoPresentation presentation = new DemoPresentation(this, display, contents);
  presentation.show();
  presentation.setOnDismissListener(mOnDismissListener);
  mActivePresentations.put(displayId, presentation);
}

@Override
protected void onPause() {
  // Be sure to call the super class.
  super.onPause();
  // Unregister from the display manager.
  mDisplayManager.unregisterDisplayListener(mDisplayListener);
  // Dismiss all of our presentations but remember their contents.
  Log.d(TAG, "Activity is being paused.  Dismissing all active presentation.");
  for (int i = 0; i < mActivePresentations.size(); i++) {
    DemoPresentation presentation = mActivePresentations.valueAt(i);
    int displayId = mActivePresentations.keyAt(i);
    mSavedPresentationContents.put(displayId, presentation.mContents);
    presentation.dismiss();
  }
  mActivePresentations.clear();
}

/**
 * Sets the preferred display mode id for the presentation.
 */
public void setPreferredDisplayMode(int modeId) {
  mContents.displayModeId = modeId;
  WindowManager.LayoutParams params = getWindow().getAttributes();
  params.preferredDisplayModeId = modeId;
  getWindow().setAttributes(params);
}

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    // Be sure to call the super class.
    super.onCreate(savedInstanceState);
    // Get the resources for the context of the presentation.
    // Notice that we are getting the resources from the context of the presentation.
    Resources r = getContext().getResources();
    // Inflate the layout.
    setContentView(R.layout.presentation_content);
    final Display display = getDisplay();
    final int displayId = display.getDisplayId();
    final int photo = mContents.photo;
    // Show a caption to describe what's going on.
    TextView text = (TextView)findViewById(R.id.text);
    text.setText(r.getString(R.string.presentation_photo_text,
        photo, displayId, display.getName()));
    // Show a n image for visual interest.
    ImageView image = (ImageView)findViewById(R.id.image);
    image.setImageDrawable(r.getDrawable(PHOTOS[photo]));
    GradientDrawable drawable = new GradientDrawable();
    drawable.setShape(GradientDrawable.RECTANGLE);
    drawable.setGradientType(GradientDrawable.RADIAL_GRADIENT);
    // Set the background to a random gradient.
    Point p = new Point();
    getDisplay().getSize(p);
    drawable.setGradientRadius(Math.max(p.x, p.y) / 2);
    drawable.setColors(mContents.colors);
    findViewById(android.R.id.content).setBackground(drawable);
  }
}

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    // Be sure to call the super class.
    super.onCreate(savedInstanceState);
    // Get the resources for the context of the presentation.
    // Notice that we are getting the resources from the context of the presentation.
    Resources r = getContext().getResources();
    // Inflate the layout.
    setContentView(R.layout.presentation_content);
    final Display display = getDisplay();
    final int displayId = display.getDisplayId();
    final int photo = mContents.photo;
    // Show a caption to describe what's going on.
    TextView text = (TextView)findViewById(R.id.text);
    text.setText(r.getString(R.string.presentation_photo_text,
        photo, displayId, display.getName()));
    // Show a n image for visual interest.
    ImageView image = (ImageView)findViewById(R.id.image);
    image.setImageDrawable(r.getDrawable(PHOTOS[photo]));
    GradientDrawable drawable = new GradientDrawable();
    drawable.setShape(GradientDrawable.RECTANGLE);
    drawable.setGradientType(GradientDrawable.RADIAL_GRADIENT);
    // Set the background to a random gradient.
    Point p = new Point();
    getDisplay().getSize(p);
    drawable.setGradientRadius(Math.max(p.x, p.y) / 2);
    drawable.setColors(mContents.colors);
    findViewById(android.R.id.content).setBackground(drawable);
  }
}

@Override
protected void onPause() {
  // Be sure to call the super class.
  super.onPause();
  // Unregister from the display manager.
  mDisplayManager.unregisterDisplayListener(mDisplayListener);
  // Dismiss all of our presentations but remember their contents.
  Log.d(TAG, "Activity is being paused.  Dismissing all active presentation.");
  for (int i = 0; i < mActivePresentations.size(); i++) {
    DemoPresentation presentation = mActivePresentations.valueAt(i);
    int displayId = mActivePresentations.keyAt(i);
    mSavedPresentationContents.put(displayId, presentation.mContents);
    presentation.dismiss();
  }
  mActivePresentations.clear();
}

/**
 * Hides a {@link Presentation} on the specified display.
 */
private void hidePresentation(Display display) {
  final int displayId = display.getDisplayId();
  DemoPresentation presentation = mActivePresentations.get(displayId);
  if (presentation == null) {
    return;
  }
  Log.d(TAG, "Dismissing presentation on display #" + displayId + ".");
  presentation.dismiss();
  mActivePresentations.delete(displayId);
}

/**
 * Hides a {@link Presentation} on the specified display.
 */
private void hidePresentation(Display display) {
  final int displayId = display.getDisplayId();
  DemoPresentation presentation = mActivePresentations.get(displayId);
  if (presentation == null) {
    return;
  }
  Log.d(TAG, "Dismissing presentation on display #" + displayId + ".");
  presentation.dismiss();
  mActivePresentations.delete(displayId);
}

/**
 * Shows a {@link Presentation} on the specified display.
 */
private void showPresentation(Display display, PresentationContents contents) {
  final int displayId = display.getDisplayId();
  if (mActivePresentations.get(displayId) != null) {
    return;
  }
  Log.d(TAG, "Showing presentation photo #" + contents.photo
      + " on display #" + displayId + ".");
  DemoPresentation presentation = new DemoPresentation(this, display, contents);
  presentation.show();
  presentation.setOnDismissListener(mOnDismissListener);
  mActivePresentations.put(displayId, presentation);
}

  @Override
  public void onDismiss(DialogInterface dialog) {
    DemoPresentation presentation = (DemoPresentation)dialog;
    int displayId = presentation.getDisplay().getDisplayId();
    Log.d(TAG, "Presentation on display #" + displayId + " was dismissed.");
    mActivePresentations.delete(displayId);
    mDisplayListAdapter.notifyDataSetChanged();
  }
};

/**
 * Sets the display mode of the {@link Presentation} on the specified display
 * if it is already shown.
 */
private void setPresentationDisplayMode(Display display, int displayModeId) {
  final int displayId = display.getDisplayId();
  DemoPresentation presentation = mActivePresentations.get(displayId);
  if (presentation == null) {
    return;
  }
  presentation.setPreferredDisplayMode(displayModeId);
}

  @Override
  public void onDismiss(DialogInterface dialog) {
    DemoPresentation presentation = (DemoPresentation)dialog;
    int displayId = presentation.getDisplay().getDisplayId();
    Log.d(TAG, "Presentation on display #" + displayId + " was dismissed.");
    mActivePresentations.delete(displayId);
    mDisplayListAdapter.notifyDataSetChanged();
  }
};