Java tutorial
/* * Copyright (C) 2013 Guillaume Lesniak * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301, USA. */ package com.ktouch.kdc.launcher4.camera.ui; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.animation.Animator; import android.content.ActivityNotFoundException; import android.content.ContentResolver; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.graphics.Bitmap; import android.net.Uri; import android.os.Handler; import android.provider.MediaStore; import android.support.v4.view.ViewPager; import android.util.AttributeSet; import android.util.Log; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.animation.AccelerateInterpolator; import android.view.animation.DecelerateInterpolator; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.RelativeLayout; import com.ktouch.kdc.launcher4.R; import com.ktouch.kdc.launcher4.app.Gallery; import com.ktouch.kdc.launcher4.camera.Util; /** * This class handles the review drawer that can be opened by swiping down */ public class ReviewDrawer extends RelativeLayout { public final static String TAG = "ReviewDrawer"; private final static long DRAWER_TOGGLE_DURATION = 400; private final static float MIN_REMOVE_THRESHOLD = 10.0f; private final static String GALLERY_CAMERA_BUCKET = "Camera"; private List<Integer> mImages; private Handler mHandler; private ImageListAdapter mImagesListAdapter; private int mReviewedImageId; private int mCurrentOrientation; private final Object mImagesLock = new Object(); private boolean mIsOpen; private ViewPager mViewPager; public ReviewDrawer(Context context) { super(context); initialize(); } public ReviewDrawer(Context context, AttributeSet attrs) { super(context, attrs); initialize(); } public ReviewDrawer(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initialize(); } private void initialize() { mHandler = new Handler(); mImages = new ArrayList<Integer>(); // Default hidden setAlpha(0.0f); mHandler.post(new Runnable() { @Override public void run() { setTranslationY(-getMeasuredHeight()); } }); // Setup the list adapter mImagesListAdapter = new ImageListAdapter(); } @Override protected void onFinishInflate() { super.onFinishInflate(); // Load pictures or videos from gallery if (Gallery.getCameraMode() == Gallery.CAMERA_MODE_VIDEO) { updateFromGallery(false, 0); } else { updateFromGallery(true, 0); } // Make sure drawer is initially closed setTranslationY(-99999); // ImageButton editImageButton = (ImageButton) findViewById(R.id.button_retouch); // editImageButton.setOnClickListener(new OnClickListener() { // @Override // public void onClick(View view) { // editInGallery(mReviewedImageId); // } // }); // // ImageButton openImageButton = (ImageButton) findViewById(R.id.button_open_in_gallery); // openImageButton.setOnClickListener(new OnClickListener() { // @Override // public void onClick(View view) { // openInGallery(mReviewedImageId); // } // }); // // mViewPager = (ViewPager) findViewById(R.id.reviewed_image); // mViewPager.setAdapter(mImagesListAdapter); // mViewPager.setPageMargin((int) Util.dpToPx(getContext(), 8)); //// mViewPager.setPageTransformer(true, new ZoomOutPageTransformer()); // mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() { // @Override // public void onPageScrolled(int i, float v, int i2) { // // } // // @Override // public void onPageSelected(int i) { // mReviewedImageId = mImages.get(i); // } // // @Override // public void onPageScrollStateChanged(int i) { // // } // }); } /** * Clears the list of images and reload it from the Gallery (MediaStore) * This method is threaded! * * @param images True to get images, false to get videos * @param scrollPos Position to scroll to, or 0 to get latest image */ public void updateFromGallery(final boolean images, final int scrollPos) { new Thread() { public void run() { updateFromGallerySynchronous(images, scrollPos); } }.start(); } /** * Clears the list of images and reload it from the Gallery (MediaStore) * This method is synchronous, see updateFromGallery for the threaded one. * * @param images True to get images, false to get videos * @param scrollPos Position to scroll to, or 0 to get latest image */ public void updateFromGallerySynchronous(final boolean images, final int scrollPos) { mHandler.post(new Runnable() { @Override public void run() { synchronized (mImagesLock) { mImages.clear(); mImagesListAdapter.notifyDataSetChanged(); } String[] columns; String orderBy; if (images) { columns = new String[] { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID }; orderBy = MediaStore.Images.Media.DATE_TAKEN + " ASC"; } else { columns = new String[] { MediaStore.Video.Media.DATA, MediaStore.Video.Media._ID }; orderBy = MediaStore.Video.Media.DATE_TAKEN + " ASC"; } // Select only the images that has been taken from the Camera Context ctx = getContext(); if (ctx == null) return; ContentResolver cr = ctx.getContentResolver(); if (cr == null) { Log.e(TAG, "No content resolver!"); return; } Cursor cursor; if (images) { cursor = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, MediaStore.Images.Media.BUCKET_DISPLAY_NAME + " LIKE ?", new String[] { GALLERY_CAMERA_BUCKET }, orderBy); } else { cursor = cr.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, columns, MediaStore.Video.Media.BUCKET_DISPLAY_NAME + " LIKE ?", new String[] { GALLERY_CAMERA_BUCKET }, orderBy); } if (cursor == null) { Log.e(TAG, "Null cursor from MediaStore!"); return; } final int imageColumnIndex = cursor .getColumnIndex(images ? MediaStore.Images.Media._ID : MediaStore.Video.Media._ID); for (int i = 0; i < cursor.getCount(); i++) { cursor.moveToPosition(i); int id = cursor.getInt(imageColumnIndex); if (mReviewedImageId <= 0) { mReviewedImageId = id; } addImageToList(id); mImagesListAdapter.notifyDataSetChanged(); } cursor.close(); if (scrollPos < mImages.size()) { mViewPager.setCurrentItem(scrollPos + 1, false); mViewPager.setCurrentItem(scrollPos, true); } } }); } /** * Queries the Media service for image orientation * * @param id The id of the gallery image * @return The orientation of the image, or 0 if it failed */ public int getCameraPhotoOrientation(final int id) { if (Gallery.getCameraMode() == Gallery.CAMERA_MODE_VIDEO) { return 0; } Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI.buildUpon().appendPath(Integer.toString(id)).build(); String[] orientationColumn = new String[] { MediaStore.Images.ImageColumns.ORIENTATION }; int orientation = 0; Cursor cur = getContext().getContentResolver().query(uri, orientationColumn, null, null, null); if (cur != null && cur.moveToFirst()) { orientation = cur.getInt(cur.getColumnIndex(orientationColumn[0])); } if (cur != null) { cur.close(); cur = null; } return orientation; } /** * Add an image at the head of the image ribbon * * @param id The id of the image from the MediaStore */ public void addImageToList(final int id) { mImagesListAdapter.addImage(id); mHandler.post(new Runnable() { @Override public void run() { mImagesListAdapter.notifyDataSetChanged(); } }); } public void scrollToLatestImage() { mHandler.post(new Runnable() { @Override public void run() { mViewPager.setCurrentItem(0); } }); } public void notifyOrientationChanged(final int orientation) { mCurrentOrientation = orientation; } private void openInGallery(final int imageId) { if (imageId > 0) { Uri uri; if (Gallery.getCameraMode() == Gallery.CAMERA_MODE_VIDEO) { uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI.buildUpon().appendPath(Integer.toString(imageId)) .build(); } else { uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI.buildUpon().appendPath(Integer.toString(imageId)) .build(); } Intent intent = new Intent(Intent.ACTION_VIEW, uri); try { Context ctx = getContext(); if (ctx != null) { ctx.startActivity(intent); } } catch (ActivityNotFoundException e) { Gallery.notify(getContext().getString(R.string.no_video_player), 2000); } } } private void editInGallery(final int imageId) { if (imageId > 0) { Intent editIntent = new Intent(Intent.ACTION_EDIT); // Get URI Uri uri = null; if (Gallery.getCameraMode() == Gallery.CAMERA_MODE_VIDEO) { uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI.buildUpon().appendPath(Integer.toString(imageId)) .build(); } else { uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI.buildUpon().appendPath(Integer.toString(imageId)) .build(); } // Start gallery edit activity editIntent.setDataAndType(uri, "image/*"); editIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); Context ctx = getContext(); if (ctx != null) { ctx.startActivity(Intent.createChooser(editIntent, null)); } } } /** * Sets the review drawer to temporary hide, by reducing alpha to a very low * level * * @param enabled To hide or not to hide, that is the question */ public void setTemporaryHide(final boolean enabled) { float alpha = (enabled ? 0.2f : 1.0f); animate().alpha(alpha).setDuration(200).start(); } /** * Returns whether or not the review drawer is FULLY open (ie. not in * quick review mode) */ public boolean isOpen() { return mIsOpen; } /** * Normally opens the review drawer (animation) */ public void open() { //mReviewedImage.setVisibility(View.VISIBLE); openImpl(1.0f); } private void openImpl(final float alpha) { mIsOpen = true; setVisibility(View.VISIBLE); animate().setDuration(DRAWER_TOGGLE_DURATION).setInterpolator(new AccelerateInterpolator()) .translationY(0.0f).setListener(null).alpha(alpha).start(); } /** * Normally closes the review drawer (animation) */ public void close() { mIsOpen = false; animate().setDuration(DRAWER_TOGGLE_DURATION).setInterpolator(new DecelerateInterpolator()) .translationY(-getMeasuredHeight()).alpha(0.0f).setListener(new Animator.AnimatorListener() { @Override public void onAnimationStart(Animator animator) { } @Override public void onAnimationEnd(Animator animator) { setVisibility(View.GONE); } @Override public void onAnimationCancel(Animator animator) { } @Override public void onAnimationRepeat(Animator animator) { } }).start(); } /** * Slide the review drawer of the specified distance on the X axis * * @param distance The distance to slide */ public void slide(final float distance) { float finalPos = getTranslationY() + distance; if (finalPos > 0) { finalPos = 0; } setTranslationY(finalPos); if (getAlpha() == 0.0f) { setVisibility(View.VISIBLE); setAlpha(1.0f); } } public void clampSliding() { if (getTranslationY() < -getMeasuredHeight() / 2) { close(); } else { openImpl(getAlpha()); } } /** * Removes the currently reviewed image from the * internal memory. */ public void removeReviewedImage() { Util.removeFromGallery(getContext().getContentResolver(), mReviewedImageId); int position = mViewPager.getCurrentItem(); if (Gallery.getCameraMode() == Gallery.CAMERA_MODE_VIDEO) { updateFromGallery(false, position); } else { updateFromGallery(true, position); } mHandler.postDelayed(new Runnable() { @Override public void run() { if (mImages.size() > 0) { int imageId = mImages.get(0); mReviewedImageId = imageId; } } }, 300); // XXX: Undo popup } /** * Open the drawer in Quick Review mode */ public void openQuickReview() { openImpl(0.5f); } /** * Adapter responsible for showing the images in the list of the review drawer */ private class ImageListAdapter extends android.support.v4.view.PagerAdapter { private Map<ImageView, Integer> mViewsToId; public ImageListAdapter() { mViewsToId = new HashMap<ImageView, Integer>(); } public void addImage(int id) { synchronized (mImagesLock) { mImages.add(0, id); } } @Override public int getItemPosition(Object object) { ImageView img = (ImageView) object; if (mImages.indexOf(mViewsToId.get(img)) >= 0) { return mImages.indexOf(mViewsToId.get(img)); } else { return POSITION_NONE; } } @Override public int getCount() { return mImages.size(); } @Override public boolean isViewFromObject(View view, Object o) { return view == o; } @Override public Object instantiateItem(ViewGroup container, final int position) { final ImageView imageView = new ImageView(getContext()); container.addView(imageView); ViewGroup.LayoutParams params = imageView.getLayoutParams(); params.width = ViewGroup.LayoutParams.WRAP_CONTENT; params.height = ViewGroup.LayoutParams.WRAP_CONTENT; imageView.setLayoutParams(params); imageView.setOnTouchListener(new ThumbnailTouchListener(imageView)); new Thread() { public void run() { int imageId = -1; synchronized (mImagesLock) { try { imageId = mImages.get(position); } catch (IndexOutOfBoundsException e) { return; } } try { mViewsToId.put(imageView, imageId); final Bitmap thumbnail = Gallery.getCameraMode() == Gallery.CAMERA_MODE_VIDEO ? (MediaStore.Video.Thumbnails.getThumbnail(getContext().getContentResolver(), mImages.get(position), MediaStore.Video.Thumbnails.MINI_KIND, null)) : (MediaStore.Images.Thumbnails.getThumbnail(getContext().getContentResolver(), imageId, MediaStore.Images.Thumbnails.MINI_KIND, null)); final int rotation = getCameraPhotoOrientation(imageId); mHandler.post(new Runnable() { @Override public void run() { imageView.setImageBitmap(thumbnail); imageView.setRotation(rotation); } }); } catch (OutOfMemoryError e) { Log.e("scroll", ""); } } }.start(); return imageView; } @Override public void destroyItem(ViewGroup container, int position, Object object) { // Remove viewpager_item.xml from ViewPager container.removeView((ImageView) object); } } /** * Pager transition animation */ // public class ZoomOutPageTransformer implements ViewPager.PageTransformer { // private final float MIN_SCALE = 0.85f; // private final float MIN_ALPHA = 0.5f; // // public void transformPage(View view, float position) { // int pageWidth = view.getWidth(); // int pageHeight = view.getHeight(); // // if (position < -1) { // [-Infinity,-1) // // This page is way off-screen to the left. // view.setAlpha(0); // // } else if (position <= 1) { // [-1,1] // // Modify the default slide transition to shrink the page as well // float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position)); // float vertMargin = pageHeight * (1 - scaleFactor) / 2; // float horzMargin = pageWidth * (1 - scaleFactor) / 2; // if (position < 0) { // view.setTranslationX(horzMargin - vertMargin / 2); // } else { // view.setTranslationX(-horzMargin + vertMargin / 2); // } // // // Scale the page down (between MIN_SCALE and 1) // view.setScaleX(scaleFactor); // view.setScaleY(scaleFactor); // // // Fade the page relative to its size. // view.setAlpha(MIN_ALPHA + // (scaleFactor - MIN_SCALE) / // (1 - MIN_SCALE) * (1 - MIN_ALPHA)); // // } else { // (1,+Infinity] // // This page is way off-screen to the right. // view.setAlpha(0); // } // } // } public class ThumbnailTouchListener implements OnTouchListener { private final GestureDetector mGestureDetector; private ImageView mImageView; private GestureDetector.SimpleOnGestureListener mListener = new GestureDetector.SimpleOnGestureListener() { private final float DRIFT_THRESHOLD = 80.0f; private final int SWIPE_THRESHOLD_VELOCITY = 800; @Override public boolean onDown(MotionEvent motionEvent) { return true; } @Override public void onShowPress(MotionEvent motionEvent) { } @Override public boolean onSingleTapUp(MotionEvent motionEvent) { return false; } @Override public boolean onScroll(MotionEvent ev1, MotionEvent ev2, float vX, float vY) { if (Math.abs(ev2.getX() - ev1.getX()) > DRIFT_THRESHOLD && Math.abs(mImageView.getTranslationY()) < MIN_REMOVE_THRESHOLD) { return false; } mImageView.setTranslationY(ev2.getRawY() - ev1.getRawY()); float alpha = Math.max(0.0f, 1.0f - Math.abs(mImageView.getTranslationY() / mImageView.getMeasuredHeight()) * 2.0f); mImageView.setAlpha(alpha); return true; } @Override public void onLongPress(MotionEvent motionEvent) { } @Override public boolean onFling(MotionEvent ev1, MotionEvent ev2, float vX, float vY) { if (Math.abs(ev2.getX() - ev1.getX()) > DRIFT_THRESHOLD) { return false; } if (Math.abs(vY) > SWIPE_THRESHOLD_VELOCITY) { mImageView.animate().translationY(-mImageView.getHeight()).alpha(0.0f).setDuration(300).start(); removeReviewedImage(); return true; } return false; } }; public ThumbnailTouchListener(ImageView iv) { mImageView = iv; mGestureDetector = new GestureDetector(getContext(), mListener); } @Override public boolean onTouch(View view, MotionEvent motionEvent) { if (motionEvent.getActionMasked() == MotionEvent.ACTION_UP) { if (mImageView.getTranslationY() > mImageView.getMeasuredHeight() * 0.5f) { mImageView.animate().translationY(-mImageView.getHeight()).alpha(0.0f).setDuration(300).start(); mHandler.postDelayed(new Runnable() { @Override public void run() { mImageView.setTranslationY(0.0f); mImageView.setTranslationX(mImageView.getWidth()); mImageView.animate().translationX(0.0f).alpha(1.0f).start(); } }, 400); removeReviewedImage(); } else { mImageView.animate().translationY(0).alpha(1.0f).setDuration(300).start(); } } return mGestureDetector.onTouchEvent(motionEvent); } } }