Java tutorial
/* * Copyright 2014 OpenMarket Ltd * * 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 im.vector.activity; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.support.v4.view.ViewPager; import android.text.TextUtils; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Toast; import com.google.gson.JsonElement; import org.matrix.androidsdk.MXSession; import org.matrix.androidsdk.db.MXMediasCache; import org.matrix.androidsdk.listeners.MXMediaDownloadListener; import org.matrix.androidsdk.rest.model.MatrixError; import org.matrix.androidsdk.util.JsonUtils; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.util.List; import im.vector.Matrix; import im.vector.R; import im.vector.adapters.VectorMediasViewerAdapter; import im.vector.db.VectorContentProvider; import im.vector.util.SlidableMediaInfo; public class VectorMediasViewerActivity extends MXCActionBarActivity { public static final String LOG_TAG = "VectorMediasViewerAct"; public static final String KEY_INFO_LIST = "ImageSliderActivity.KEY_INFO_LIST"; public static final String KEY_INFO_LIST_INDEX = "ImageSliderActivity.KEY_INFO_LIST_INDEX"; public static final String KEY_THUMBNAIL_WIDTH = "ImageSliderActivity.KEY_THUMBNAIL_WIDTH"; public static final String KEY_THUMBNAIL_HEIGHT = "ImageSliderActivity.KEY_THUMBNAIL_HEIGHT"; public static final String EXTRA_MATRIX_ID = "ImageSliderActivity.EXTRA_MATRIX_ID"; private MXSession mSession; private MXMediasCache mxMediasCache; private ViewPager mViewPager; private VectorMediasViewerAdapter mAdapter; private List<SlidableMediaInfo> mMediasList; public class DepthPageTransformer implements ViewPager.PageTransformer { private static final float MIN_SCALE = 0.75f; public void transformPage(View view, float position) { int pageWidth = view.getWidth(); if (position < -1) { // [-Infinity,-1) // This page is way off-screen to the left. view.setAlpha(0); } else if (position <= 0) { // [-1,0] // Use the default slide transition when moving to the left page view.setAlpha(1); view.setTranslationX(0); view.setScaleX(1); view.setScaleY(1); } else if (position <= 1) { // (0,1] // Fade the page out. view.setAlpha(1 - position); // Counteract the default slide transition view.setTranslationX(pageWidth * -position); // Scale the page down (between MIN_SCALE and 1) float scaleFactor = MIN_SCALE + (1 - MIN_SCALE) * (1 - Math.abs(position)); view.setScaleX(scaleFactor); view.setScaleY(scaleFactor); } else { // (1,+Infinity] // This page is way off-screen to the right. view.setAlpha(0); } } } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (CommonActivityUtils.shouldRestartApp(this)) { Log.d(LOG_TAG, "onCreate : restart the application"); CommonActivityUtils.restartApp(this); return; } if (CommonActivityUtils.isGoingToSplash(this)) { Log.d(LOG_TAG, "onCreate : Going to splash screen"); return; } String matrixId = null; Intent intent = getIntent(); if (intent.hasExtra(EXTRA_MATRIX_ID)) { matrixId = intent.getStringExtra(EXTRA_MATRIX_ID); } mSession = Matrix.getInstance(getApplicationContext()).getSession(matrixId); if (mSession == null) { finish(); return; } mxMediasCache = mSession.getMediasCache(); mMediasList = (List<SlidableMediaInfo>) intent.getSerializableExtra(KEY_INFO_LIST); setContentView(R.layout.activity_vector_medias_viewer); mViewPager = (ViewPager) findViewById(R.id.view_pager); int position = intent.getIntExtra(KEY_INFO_LIST_INDEX, 0); int maxImageWidth = intent.getIntExtra(KEY_THUMBNAIL_WIDTH, 0); int maxImageHeight = intent.getIntExtra(VectorMediasViewerActivity.KEY_THUMBNAIL_HEIGHT, 0); mAdapter = new VectorMediasViewerAdapter(this, mSession, mxMediasCache, mMediasList, maxImageWidth, maxImageHeight); mAdapter.autoPlayItemAt(position); mViewPager.setAdapter(mAdapter); mViewPager.setCurrentItem(position); mViewPager.setPageTransformer(true, new DepthPageTransformer()); if (null != VectorMediasViewerActivity.this.getSupportActionBar()) { VectorMediasViewerActivity.this.getSupportActionBar().setTitle(mMediasList.get(position).mFileName); } mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { if (null != VectorMediasViewerActivity.this.getSupportActionBar()) { VectorMediasViewerActivity.this.getSupportActionBar() .setTitle(mMediasList.get(position).mFileName); } } @Override public void onPageScrollStateChanged(int state) { } }); } @Override protected void onPause() { super.onPause(); // stop any playing video mAdapter.stopPlayingVideo(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // the application is in a weird state if (CommonActivityUtils.shouldRestartApp(this)) { return false; } // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.vector_medias_viewer, menu); return true; } /** * Download the current video file */ private void onAction(final int position, final int action) { MXMediasCache mediasCache = Matrix.getInstance(this).getMediasCache(); SlidableMediaInfo mediaInfo = mMediasList.get(position); File file = mediasCache.mediaCacheFile(mediaInfo.mMediaUrl, mediaInfo.mMimeType); // check if the media has already been downloaded if (null != file) { // download if (action == R.id.ic_action_download) { if (null != CommonActivityUtils.saveMediaIntoDownloads(this, file, mediaInfo.mFileName, mediaInfo.mMimeType)) { Toast.makeText(this, getText(R.string.media_slider_saved), Toast.LENGTH_LONG).show(); } } else { // shared Uri mediaUri = null; File renamedFile = file; if (!TextUtils.isEmpty(mediaInfo.mFileName)) try { InputStream fin = new FileInputStream(file); String tmpUrl = mediasCache.saveMedia(fin, mediaInfo.mFileName, mediaInfo.mMimeType); if (null != tmpUrl) { renamedFile = mediasCache.mediaCacheFile(tmpUrl, mediaInfo.mMimeType); } } catch (Exception e) { Log.e(LOG_TAG, "## onAction() : mediasCache.mediaCacheFile.absolutePathToUri failed " + e.getMessage()); } if (null != renamedFile) { try { mediaUri = VectorContentProvider.absolutePathToUri(this, renamedFile.getAbsolutePath()); } catch (Exception e) { Log.e(LOG_TAG, "## onAction() : RiotContentProvider.absolutePathToUri failed " + e.getMessage()); } } if (null != mediaUri) { try { final Intent sendIntent = new Intent(); sendIntent.setAction(Intent.ACTION_SEND); sendIntent.setType(mediaInfo.mMimeType); sendIntent.putExtra(Intent.EXTRA_STREAM, mediaUri); startActivity(sendIntent); } catch (Exception e) { Log.e(LOG_TAG, "## onAction : cannot display the media " + mediaUri + " mimeType " + mediaInfo.mMimeType); CommonActivityUtils.displayToast(this, e.getLocalizedMessage()); } } } } else { // else download it final String downloadId = mediasCache.downloadMedia(this, mSession.getHomeserverConfig(), mediaInfo.mMediaUrl, mediaInfo.mMimeType); if (null != downloadId) { mediasCache.addDownloadListener(downloadId, new MXMediaDownloadListener() { @Override public void onDownloadError(String downloadId, JsonElement jsonElement) { MatrixError error = JsonUtils.toMatrixError(jsonElement); if ((null != error) && error.isSupportedErrorCode()) { Toast.makeText(VectorMediasViewerActivity.this, error.getLocalizedMessage(), Toast.LENGTH_LONG).show(); } } @Override public void onDownloadComplete(String aDownloadId) { if (aDownloadId.equals(downloadId)) { onAction(position, action); } } }); } } } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.ic_action_share) { onAction(mViewPager.getCurrentItem(), id); return true; } else if (id == R.id.ic_action_download) { onAction(mViewPager.getCurrentItem(), id); return true; } return super.onOptionsItemSelected(item); } }