Java tutorial
/* * Copyright (C) Texas Instruments - http://www.ti.com/ * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.ti.omap.android.multidispapp.photo; import java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; import android.app.Activity; import android.graphics.Bitmap; import android.os.Bundle; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.ti.omap.android.multidispapp.DDHelper; import com.ti.omap.android.multidispapp.OnCommandListener; import com.ti.omap.android.multidispapp.PrimaryFragment; import com.ti.omap.android.multidispapp.R; import com.ti.omap.android.multidispapp.photo.PhotoGalleryCtrl.PhotoChangeListener; import com.ti.omap.android.multidispapp.photo.PhotoGalleryCtrl.TPhoto; import com.ti.omap.android.multidispapp.photo.SlideshowCtrl.SlideshowListener; public class PrimaryPhotoFragment extends PrimaryFragment implements OnClickListener, PhotoChangeListener, SlideshowListener { final private static String sFormat = "yyyy.MM.dd HH:mm:ss"; final private static Format sFormatter = new SimpleDateFormat(sFormat); private PhotoGalleryCtrl mGalleryCtrl; private SlideshowCtrl mSlideshowCtrl; private View mGeneralView; private ImageView mPreviewImage; private TextView mPreviewTitleView; private TextView mPreviewSizeView; private TextView mPreviewDateView; private OnCommandListener mCommandCallback; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.photo_controls, container, false); ViewPager viewPager = (ViewPager) view.findViewById(R.id.photo_gallery); mGalleryCtrl = new PhotoGalleryCtrl(viewPager, this); mSlideshowCtrl = new SlideshowCtrl(this, getActivity()); mGeneralView = view; mPreviewImage = (ImageView) view.findViewById(R.id.photo_preview_image); mPreviewTitleView = (TextView) view.findViewById(R.id.photo_details_title); mPreviewSizeView = (TextView) view.findViewById(R.id.photo_details_size); mPreviewDateView = (TextView) view.findViewById(R.id.photo_details_date_taken); DDHelper.registerClickListener(R.id.photo_button_show, this, view); DDHelper.registerClickListener(R.id.photo_button_previous, this, view); DDHelper.registerClickListener(R.id.photo_button_next, this, view); DDHelper.registerClickListener(R.id.photo_button_start, this, view); DDHelper.registerClickListener(R.id.photo_button_stop, this, view); return view; } @Override public void onResume() { super.onResume(); if (mGalleryCtrl != null) { mGalleryCtrl.init(getActivity()); setSlideshowControlState(true); } } @Override public void onPause() { super.onPause(); if (mGalleryCtrl != null) { mGalleryCtrl.close(); mGalleryCtrl = null; } if (mSlideshowCtrl != null) { mSlideshowCtrl.stop(); } } @Override public void onPhotoChange(final TPhoto photo) { if (photo == null || mGeneralView == null) { return; } mGeneralView.post(new Runnable() { @Override public void run() { Bitmap dPhoto = photo != null ? photo.getBitmapPhoto() : null; if (dPhoto != null) { mPreviewImage.setImageBitmap(dPhoto); } else { mPreviewImage.setImageResource(R.drawable.too_heavy); } mPreviewTitleView.setText(photo.mTitle); mPreviewSizeView.setText(makeSizeString(photo)); mPreviewDateView.setText(makeDate(photo.mDateTaken)); } }); } private String makeSizeString(TPhoto photo) { StringBuilder sb = new StringBuilder(); sb.append(photo.mWidth); sb.append(" x "); sb.append(photo.mHeight); sb.append(" - "); sb.append(photo.mSize); sb.append(getActivity().getString(R.string._bytes)); return sb.toString(); } private String makeDate(long intDate) { String formattedDate = null; Date date = new Date(intDate); formattedDate = sFormatter.format(date); return formattedDate; } @Override public void onAttach(Activity activity) { super.onAttach(activity); // This makes sure that the container activity has implemented // the callback interface. If not, it throws an exception try { mCommandCallback = (OnCommandListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement OnHeadlineSelectedListener"); } } @Override public void onClick(View v) { int viewId = v.getId(); switch (viewId) { case R.id.photo_button_show: { TPhoto photo = mGalleryCtrl.getCurrentPhoto(); showExternalPhoto(photo); } break; case R.id.photo_button_previous: { TPhoto photo = mGalleryCtrl.getPreviousPhoto(); showExternalPhoto(photo); } break; case R.id.photo_button_next: { TPhoto photo = mGalleryCtrl.getNextPhoto(); showExternalPhoto(photo); } break; case R.id.photo_button_start: mSlideshowCtrl.start(); break; case R.id.photo_button_stop: mSlideshowCtrl.stop(); break; default: throw new IllegalStateException("Button click wasn't handled: id: " + viewId); } } private void showExternalPhoto(TPhoto photo) { if (photo == null) { getActivity().runOnUiThread(new Runnable() { public void run() { Toast.makeText(getActivity(), R.string.no_photo, Toast.LENGTH_SHORT).show(); } }); return; } Bundle cmd = new Bundle(); cmd.putInt(PhotoCmdDefines.CMD, PhotoCmdDefines.CMD_SHOW_PHOTO); cmd.putParcelable(PhotoCmdDefines.SLIDESHOW_URI, photo.mUri); cmd.putInt(OnCommandListener.DISPLAY_ID, getDisplayId(0)); mCommandCallback.onCommand(cmd); } @Override public void onStateChanged(int slideshowState) { switch (slideshowState) { case SlideshowListener.INITED: break; case SlideshowListener.STARTED: getActivity().runOnUiThread(new Runnable() { public void run() { Toast.makeText(getActivity(), R.string.start, Toast.LENGTH_SHORT).show(); } }); setSlideshowControlState(false); break; case SlideshowListener.CANT_START: getActivity().runOnUiThread(new Runnable() { public void run() { Toast.makeText(getActivity(), R.string.cant_start_slideshow, Toast.LENGTH_SHORT).show(); } }); setSlideshowControlState(true); break; case SlideshowListener.STOPPED: getActivity().runOnUiThread(new Runnable() { public void run() { Toast.makeText(getActivity(), R.string.stop, Toast.LENGTH_SHORT).show(); } }); setSlideshowControlState(true); break; case SlideshowListener.UNDEFINED: default: break; } } private void setSlideshowControlState(final boolean enabled) { getActivity().runOnUiThread(new Runnable() { public void run() { Activity activity = getActivity(); activity.findViewById(R.id.photo_button_show).setEnabled(enabled); activity.findViewById(R.id.photo_button_previous).setEnabled(enabled); activity.findViewById(R.id.photo_button_next).setEnabled(enabled); activity.findViewById(R.id.photo_button_start).setEnabled(enabled); activity.findViewById(R.id.photo_button_stop).setEnabled(!enabled); } }); } }