Java tutorial
/* * Copyright (C) 2011 University of Washington * * 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 org.odk.collect.android.views; import android.content.ActivityNotFoundException; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Color; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.net.Uri; import android.support.v4.content.ContextCompat; import android.support.v7.widget.AppCompatImageButton; import android.util.DisplayMetrics; import android.view.View; import android.view.View.OnClickListener; import android.widget.CheckBox; import android.widget.ImageView; import android.widget.ImageView.ScaleType; import android.widget.RadioButton; import android.widget.RelativeLayout; import android.widget.TextView; import org.javarosa.core.model.FormIndex; import org.javarosa.core.reference.InvalidReferenceException; import org.javarosa.core.reference.ReferenceManager; import org.odk.collect.android.R; import org.odk.collect.android.application.Collect; import org.odk.collect.android.listeners.AudioPlayListener; import org.odk.collect.android.utilities.FileUtils; import org.odk.collect.android.utilities.ToastUtils; import org.odk.collect.android.utilities.ViewIds; import java.io.File; import timber.log.Timber; /** * This layout is used anywhere we can have image/audio/video/text. TODO: It would probably be nice * to put this in a layout.xml file of some sort at some point. * * @author carlhartung */ public class MediaLayout extends RelativeLayout implements OnClickListener { private String selectionDesignator; private FormIndex index; private TextView viewText; private AudioButton audioButton; private AppCompatImageButton videoButton; private ImageView imageView; private TextView missingImage; private String videoURI = null; private MediaPlayer player; private AudioPlayListener audioPlayListener; private int playTextColor; private int playBackgroundTextColor; private Context context; private CharSequence originalText; public MediaLayout(Context c, MediaPlayer player) { super(c); context = c; viewText = null; audioButton = null; imageView = null; missingImage = null; videoButton = null; index = null; this.player = player; audioPlayListener = null; playTextColor = Color.BLUE; } public void playAudio() { if (audioButton != null) { // have to call toString() to remove the html formatting // (it's a spanned thing...) viewText.setText(viewText.getText().toString()); viewText.setTextColor(playTextColor); viewText.setBackgroundColor(playBackgroundTextColor); audioButton.playAudio(); } } public void setPlayTextColor(int textColor) { playTextColor = textColor; } public void setPlayTextBackgroundColor(int textColor) { playBackgroundTextColor = textColor; } /* * Resets text formatting to whatever is defaulted * in the form */ public void resetTextFormatting() { // first set it to defaults viewText.setTextColor(ContextCompat.getColor(context, R.color.primaryTextColor)); // then set the text to our original (brings back any html formatting) viewText.setText(originalText); } public void playVideo() { if (videoURI != null) { String videoFilename = ""; try { videoFilename = ReferenceManager.instance().DeriveReference(videoURI).getLocalURI(); } catch (InvalidReferenceException e) { Timber.e(e, "Invalid reference exception due to %s ", e.getMessage()); } File videoFile = new File(videoFilename); if (!videoFile.exists()) { // We should have a video clip, but the file doesn't exist. String errorMsg = getContext().getString(R.string.file_missing, videoFilename); Timber.d("File %s is missing", videoFilename); ToastUtils.showLongToast(errorMsg); return; } Intent i = new Intent("android.intent.action.VIEW"); i.setDataAndType(Uri.fromFile(videoFile), "video/*"); if (i.resolveActivity(getContext().getPackageManager()) != null) { getContext().startActivity(i); } else { ToastUtils.showShortToast(getContext().getString(R.string.activity_not_found, "view video")); } } } public void setAVT(FormIndex index, String selectionDesignator, TextView text, String audioURI, String imageURI, String videoURI, final String bigImageURI) { this.selectionDesignator = selectionDesignator; this.index = index; viewText = text; originalText = text.getText(); viewText.setId(ViewIds.generateViewId()); this.videoURI = videoURI; // Layout configurations for our elements in the relative layout RelativeLayout.LayoutParams textParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); RelativeLayout.LayoutParams audioParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); RelativeLayout.LayoutParams imageParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); RelativeLayout.LayoutParams videoParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); // First set up the audio button if (audioURI != null) { // An audio file is specified audioButton = new AudioButton(getContext(), this.index, this.selectionDesignator, audioURI, player); audioButton.setPadding(22, 12, 22, 12); audioButton.setBackgroundColor(Color.LTGRAY); audioButton.setOnClickListener(this); audioButton.setId(ViewIds.generateViewId()); // random ID to be used by the // relative layout. } else { // No audio file specified, so ignore. } // Then set up the video button if (videoURI != null) { // An video file is specified videoButton = new AppCompatImageButton(getContext()); Bitmap b = BitmapFactory.decodeResource(getContext().getResources(), android.R.drawable.ic_media_play); videoButton.setImageBitmap(b); videoButton.setPadding(22, 12, 22, 12); videoButton.setBackgroundColor(Color.LTGRAY); videoButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Collect.getInstance().getActivityLogger().logInstanceAction(this, "onClick", "playVideoPrompt" + MediaLayout.this.selectionDesignator, MediaLayout.this.index); MediaLayout.this.playVideo(); } }); videoButton.setId(ViewIds.generateViewId()); } else { // No video file specified, so ignore. } // Now set up the image view String errorMsg = null; final int imageId = ViewIds.generateViewId(); if (imageURI != null) { try { String imageFilename = ReferenceManager.instance().DeriveReference(imageURI).getLocalURI(); final File imageFile = new File(imageFilename); if (imageFile.exists()) { DisplayMetrics metrics = context.getResources().getDisplayMetrics(); int screenWidth = metrics.widthPixels; int screenHeight = metrics.heightPixels; Bitmap b = FileUtils.getBitmapScaledToDisplay(imageFile, screenHeight, screenWidth); if (b != null) { imageView = new ImageView(getContext()); imageView.setPadding(2, 2, 2, 2); imageView.setImageBitmap(b); imageView.setId(imageId); imageView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (bigImageURI != null) { Collect.getInstance().getActivityLogger().logInstanceAction(this, "onClick", "showImagePromptBigImage" + MediaLayout.this.selectionDesignator, MediaLayout.this.index); try { File bigImage = new File(ReferenceManager.instance() .DeriveReference(bigImageURI).getLocalURI()); Intent i = new Intent("android.intent.action.VIEW"); i.setDataAndType(Uri.fromFile(bigImage), "image/*"); getContext().startActivity(i); } catch (InvalidReferenceException e) { Timber.e(e, "Invalid image reference due to %s ", e.getMessage()); } catch (ActivityNotFoundException e) { Timber.d(e, "No Activity found to handle due to %s", e.getMessage()); ToastUtils.showShortToast( getContext().getString(R.string.activity_not_found, "view image")); } } else { if (viewText instanceof RadioButton) { ((RadioButton) viewText).setChecked(true); } else if (viewText instanceof CheckBox) { CheckBox checkbox = (CheckBox) viewText; checkbox.setChecked(!checkbox.isChecked()); } } } }); } else { // Loading the image failed, so it's likely a bad file. errorMsg = getContext().getString(R.string.file_invalid, imageFile); } } else { // We should have an image, but the file doesn't exist. errorMsg = getContext().getString(R.string.file_missing, imageFile); } if (errorMsg != null) { // errorMsg is only set when an error has occurred Timber.e(errorMsg); missingImage = new TextView(getContext()); missingImage.setText(errorMsg); missingImage.setPadding(10, 10, 10, 10); missingImage.setId(imageId); } } catch (InvalidReferenceException e) { Timber.e(e, "Invalid image reference due to %s ", e.getMessage()); } } else { // There's no imageURI listed, so just ignore it. } // e.g., for TextView that flag will be true boolean isNotAMultipleChoiceField = !RadioButton.class.isAssignableFrom(text.getClass()) && !CheckBox.class.isAssignableFrom(text.getClass()); // Determine the layout constraints... // Assumes LTR, TTB reading bias! if (viewText.getText().length() == 0 && (imageView != null || missingImage != null)) { // No text; has image. The image is treated as question/choice icon. // The Text view may just have a radio button or checkbox. It // needs to remain in the layout even though it is blank. // // The image view, as created above, will dynamically resize and // center itself. We want it to resize but left-align itself // in the resized area and we want a white background, as otherwise // it will show a grey bar to the right of the image icon. if (imageView != null) { imageView.setScaleType(ScaleType.FIT_START); } // // In this case, we have: // Text upper left; image upper, left edge aligned with text right edge; // audio upper right; video below audio on right. textParams.addRule(RelativeLayout.ALIGN_PARENT_TOP); textParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT); if (isNotAMultipleChoiceField) { imageParams.addRule(RelativeLayout.CENTER_HORIZONTAL); } else { imageParams.addRule(RelativeLayout.RIGHT_OF, viewText.getId()); } imageParams.addRule(RelativeLayout.ALIGN_PARENT_TOP); if (audioButton != null && videoButton == null) { audioParams.addRule(RelativeLayout.ALIGN_PARENT_TOP); audioParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); audioParams.setMargins(0, 0, 11, 0); imageParams.addRule(RelativeLayout.LEFT_OF, audioButton.getId()); } else if (audioButton == null && videoButton != null) { videoParams.addRule(RelativeLayout.ALIGN_PARENT_TOP); videoParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); videoParams.setMargins(0, 0, 11, 0); imageParams.addRule(RelativeLayout.LEFT_OF, videoButton.getId()); } else if (audioButton != null && videoButton != null) { audioParams.addRule(RelativeLayout.ALIGN_PARENT_TOP); audioParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); audioParams.setMargins(0, 0, 11, 0); imageParams.addRule(RelativeLayout.LEFT_OF, audioButton.getId()); videoParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); videoParams.addRule(RelativeLayout.BELOW, audioButton.getId()); videoParams.setMargins(0, 20, 11, 0); imageParams.addRule(RelativeLayout.LEFT_OF, videoButton.getId()); } else { // the image will implicitly scale down to fit within parent... // no need to bound it by the width of the parent... if (!isNotAMultipleChoiceField) { imageParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); } } imageParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); } else { // We have a non-blank text label -- image is below the text. // In this case, we want the image to be centered... if (imageView != null) { imageView.setScaleType(ScaleType.FIT_START); } // // Text upper left; audio upper right; video below audio on right. // image below text, audio and video buttons; left-aligned with text. textParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT); textParams.addRule(RelativeLayout.ALIGN_PARENT_TOP); if (audioButton != null && videoButton == null) { audioParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); audioParams.setMargins(0, 0, 11, 0); textParams.addRule(RelativeLayout.LEFT_OF, audioButton.getId()); } else if (audioButton == null && videoButton != null) { videoParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); videoParams.setMargins(0, 0, 11, 0); textParams.addRule(RelativeLayout.LEFT_OF, videoButton.getId()); } else if (audioButton != null && videoButton != null) { audioParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); audioParams.setMargins(0, 0, 11, 0); textParams.addRule(RelativeLayout.LEFT_OF, audioButton.getId()); videoParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); videoParams.setMargins(0, 20, 11, 0); videoParams.addRule(RelativeLayout.BELOW, audioButton.getId()); } else { textParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); } if (imageView != null || missingImage != null) { imageParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); imageParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT); if (videoButton != null) { imageParams.addRule(RelativeLayout.LEFT_OF, videoButton.getId()); } else if (audioButton != null) { imageParams.addRule(RelativeLayout.LEFT_OF, audioButton.getId()); } imageParams.addRule(RelativeLayout.BELOW, viewText.getId()); } else { textParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); } } addView(viewText, textParams); if (audioButton != null) { addView(audioButton, audioParams); } if (videoButton != null) { addView(videoButton, videoParams); } if (imageView != null) { addView(imageView, imageParams); } else if (missingImage != null) { addView(missingImage, imageParams); } } /** * This adds a divider at the bottom of this layout. Used to separate fields in lists. */ public void addDivider(ImageView v) { RelativeLayout.LayoutParams dividerParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); if (imageView != null) { dividerParams.addRule(RelativeLayout.BELOW, imageView.getId()); } else if (missingImage != null) { dividerParams.addRule(RelativeLayout.BELOW, missingImage.getId()); } else if (videoButton != null) { dividerParams.addRule(RelativeLayout.BELOW, videoButton.getId()); } else if (audioButton != null) { dividerParams.addRule(RelativeLayout.BELOW, audioButton.getId()); } else if (viewText != null) { // No picture dividerParams.addRule(RelativeLayout.BELOW, viewText.getId()); } else { Timber.e("Tried to add divider to uninitialized ATVWidget"); return; } addView(v, dividerParams); } public void setTextcolor(int color) { viewText.setTextColor(color); } public TextView getView_Text() { return viewText; } /** * This is what gets called when the AudioButton gets clicked */ @Override public void onClick(View v) { if (audioPlayListener != null) { audioPlayListener.resetQuestionTextColor(); } if (player.isPlaying()) { player.stop(); Bitmap b = BitmapFactory.decodeResource(getContext().getResources(), android.R.drawable.ic_lock_silent_mode_off); audioButton.setImageBitmap(b); } else { playAudio(); Bitmap b = BitmapFactory.decodeResource(getContext().getResources(), android.R.drawable.ic_media_pause); audioButton.setImageBitmap(b); } player.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mediaPlayer) { resetTextFormatting(); mediaPlayer.reset(); Bitmap b = BitmapFactory.decodeResource(getContext().getResources(), android.R.drawable.ic_lock_silent_mode_off); audioButton.setImageBitmap(b); } }); } public void setAudioListener(AudioPlayListener listener) { audioPlayListener = listener; } }