src/com/android/gallery3d/ingest/IngestActivity.java - LeafOS-Project/android_packages_apps_Gallery2 - Gitiles

 /*
  * Copyright (C) 2013 The Android Open Source Project
  *
  * 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.android.gallery3d.ingest;

 import com.android.gallery3d.R;
 import com.android.gallery3d.ingest.adapter.CheckBroker;
 import com.android.gallery3d.ingest.adapter.MtpAdapter;
 import com.android.gallery3d.ingest.adapter.MtpPagerAdapter;
 import com.android.gallery3d.ingest.data.ImportTask;
 import com.android.gallery3d.ingest.data.IngestObjectInfo;
 import com.android.gallery3d.ingest.data.MtpBitmapFetch;
 import com.android.gallery3d.ingest.data.MtpDeviceIndex;
 import com.android.gallery3d.ingest.ui.DateTileView;
 import com.android.gallery3d.ingest.ui.IngestGridView;
 import com.android.gallery3d.ingest.ui.IngestGridView.OnClearChoicesListener;

 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.ProgressDialog;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
 import android.content.res.Configuration;
 import android.database.DataSetObserver;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Message;
 import androidx.viewpager.widget.ViewPager;
 import android.util.SparseBooleanArray;
 import android.view.ActionMode;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.AbsListView.MultiChoiceModeListener;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.TextView;

 import java.lang.ref.WeakReference;
 import java.util.Collection;

 /**
  * MTP importer, main activity.
  */
 @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)
 public class IngestActivity extends Activity implements
     MtpDeviceIndex.ProgressListener, ImportTask.Listener {

   private IngestService mHelperService;
   private boolean mActive = false;
   private IngestGridView mGridView;
   private MtpAdapter mAdapter;
   private Handler mHandler;
   private ProgressDialog mProgressDialog;
   private ActionMode mActiveActionMode;

   private View mWarningView;
   private TextView mWarningText;
   private int mLastCheckedPosition = 0;

   private ViewPager mFullscreenPager;
   private MtpPagerAdapter mPagerAdapter;
   private boolean mFullscreenPagerVisible = false;

   private MenuItem mMenuSwitcherItem;
   private MenuItem mActionMenuSwitcherItem;

   // The MTP framework components don't give us fine-grained file copy
   // progress updates, so for large photos and videos, we will be stuck
   // with a dialog not updating for a long time. To give the user feedback,
   // we switch to the animated indeterminate progress bar after the timeout
   // specified by INDETERMINATE_SWITCH_TIMEOUT_MS. On the next update from
   // the framework, we switch back to the normal progress bar.
   private static final int INDETERMINATE_SWITCH_TIMEOUT_MS = 3000;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     doBindHelperService();

     setContentView(R.layout.ingest_activity_item_list);
     mGridView = (IngestGridView) findViewById(R.id.ingest_gridview);
     mAdapter = new MtpAdapter(this);
     mAdapter.registerDataSetObserver(mPrimaryObserver);
     mGridView.setAdapter(mAdapter);
     mGridView.setMultiChoiceModeListener(mMultiChoiceModeListener);
     mGridView.setOnItemClickListener(mOnItemClickListener);
     mGridView.setOnClearChoicesListener(mPositionMappingCheckBroker);

     mFullscreenPager = (ViewPager) findViewById(R.id.ingest_view_pager);

     mHandler = new ItemListHandler(this);

     MtpBitmapFetch.configureForContext(this);
   }

   private OnItemClickListener mOnItemClickListener = new OnItemClickListener() {
     @Override
     public void onItemClick(AdapterView<?> adapterView, View itemView, int position,
         long arg3) {
       mLastCheckedPosition = position;
       mGridView.setItemChecked(position, !mGridView.getCheckedItemPositions().get(position));
     }
   };

   private MultiChoiceModeListener mMultiChoiceModeListener = new MultiChoiceModeListener() {
     private boolean mIgnoreItemCheckedStateChanges = false;

     private void updateSelectedTitle(ActionMode mode) {
       int count = mGridView.getCheckedItemCount();
       mode.setTitle(getResources().getQuantityString(
           R.plurals.ingest_number_of_items_selected, count, count));
     }

     @Override
     public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
         boolean checked) {
       if (mIgnoreItemCheckedStateChanges) {
         return;
       }
       if (mAdapter.itemAtPositionIsBucket(position)) {
         SparseBooleanArray checkedItems = mGridView.getCheckedItemPositions();
         mIgnoreItemCheckedStateChanges = true;
         mGridView.setItemChecked(position, false);

         // Takes advantage of the fact that SectionIndexer imposes the
         // need to clamp to the valid range
         int nextSectionStart = mAdapter.getPositionForSection(
             mAdapter.getSectionForPosition(position) + 1);
         if (nextSectionStart == position) {
           nextSectionStart = mAdapter.getCount();
         }

         boolean rangeValue = false; // Value we want to set all of the bucket items to

         // Determine if all the items in the bucket are currently checked, so that we
         // can uncheck them, otherwise we will check all items in the bucket.
         for (int i = position + 1; i < nextSectionStart; i++) {
           if (!checkedItems.get(i)) {
             rangeValue = true;
             break;
           }
         }

         // Set all items in the bucket to the desired state
         for (int i = position + 1; i < nextSectionStart; i++) {
           if (checkedItems.get(i) != rangeValue) {
             mGridView.setItemChecked(i, rangeValue);
           }
         }

         mPositionMappingCheckBroker.onBulkCheckedChange();
         mIgnoreItemCheckedStateChanges = false;
       } else {
         mPositionMappingCheckBroker.onCheckedChange(position, checked);
       }
       mLastCheckedPosition = position;
       updateSelectedTitle(mode);
     }

     @Override
     public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
       return onOptionsItemSelected(item);
     }

     @Override
     public boolean onCreateActionMode(ActionMode mode, Menu menu) {
       MenuInflater inflater = mode.getMenuInflater();
       inflater.inflate(R.menu.ingest_menu_item_list_selection, menu);
       updateSelectedTitle(mode);
       mActiveActionMode = mode;
       mActionMenuSwitcherItem = menu.findItem(R.id.ingest_switch_view);
       setSwitcherMenuState(mActionMenuSwitcherItem, mFullscreenPagerVisible);
       return true;
     }

     @Override
     public void onDestroyActionMode(ActionMode mode) {
       mActiveActionMode = null;
       mActionMenuSwitcherItem = null;
       mHandler.sendEmptyMessage(ItemListHandler.MSG_BULK_CHECKED_CHANGE);
     }

     @Override
     public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
       updateSelectedTitle(mode);
       return false;
     }
   };

   @Override
   public boolean onOptionsItemSelected(MenuItem item) {
     int id = item.getItemId();
     if (id == R.id.ingest_import_items) {
       if (mActiveActionMode != null) {
         mHelperService.importSelectedItems(
             mGridView.getCheckedItemPositions(),
             mAdapter);
         mActiveActionMode.finish();
       }
       return true;
     } else if (id == R.id.ingest_switch_view) {
       setFullscreenPagerVisibility(!mFullscreenPagerVisible);
       return true;
     } else {
       return false;
     }
   }

   @Override
   public boolean onCreateOptionsMenu(Menu menu) {
     MenuInflater inflater = getMenuInflater();
     inflater.inflate(R.menu.ingest_menu_item_list_selection, menu);
     mMenuSwitcherItem = menu.findItem(R.id.ingest_switch_view);
     menu.findItem(R.id.ingest_import_items).setVisible(false);
     setSwitcherMenuState(mMenuSwitcherItem, mFullscreenPagerVisible);
     return true;
   }

   @Override
   protected void onDestroy() {
     doUnbindHelperService();
     super.onDestroy();
   }

   @Override
   protected void onResume() {
     DateTileView.refreshLocale();
     mActive = true;
     if (mHelperService != null) {
       mHelperService.setClientActivity(this);
     }
     updateWarningView();
     super.onResume();
   }

   @Override
   protected void onPause() {
     if (mHelperService != null) {
       mHelperService.setClientActivity(null);
     }
     mActive = false;
     cleanupProgressDialog();
     super.onPause();
   }

   @Override
   public void onConfigurationChanged(Configuration newConfig) {
     super.onConfigurationChanged(newConfig);
     MtpBitmapFetch.configureForContext(this);
   }

   private void showWarningView(int textResId) {
     if (mWarningView == null) {
       mWarningView = findViewById(R.id.ingest_warning_view);
       mWarningText =
           (TextView) mWarningView.findViewById(R.id.ingest_warning_view_text);
     }
     mWarningText.setText(textResId);
     mWarningView.setVisibility(View.VISIBLE);
     setFullscreenPagerVisibility(false);
     mGridView.setVisibility(View.GONE);
     setSwitcherMenuVisibility(false);
   }

   private void hideWarningView() {
     if (mWarningView != null) {
       mWarningView.setVisibility(View.GONE);
       setFullscreenPagerVisibility(false);
     }
     setSwitcherMenuVisibility(true);
   }

   private PositionMappingCheckBroker mPositionMappingCheckBroker =
       new PositionMappingCheckBroker();

   private class PositionMappingCheckBroker extends CheckBroker
       implements OnClearChoicesListener {
     private int mLastMappingPager = -1;
     private int mLastMappingGrid = -1;

     private int mapPagerToGridPosition(int position) {
       if (position != mLastMappingPager) {
         mLastMappingPager = position;
         mLastMappingGrid = mAdapter.translatePositionWithoutLabels(position);
       }
       return mLastMappingGrid;
     }

     private int mapGridToPagerPosition(int position) {
       if (position != mLastMappingGrid) {
         mLastMappingGrid = position;
         mLastMappingPager = mPagerAdapter.translatePositionWithLabels(position);
       }
       return mLastMappingPager;
     }

     @Override
     public void setItemChecked(int position, boolean checked) {
       mGridView.setItemChecked(mapPagerToGridPosition(position), checked);
     }

     @Override
     public void onCheckedChange(int position, boolean checked) {
       if (mPagerAdapter != null) {
         super.onCheckedChange(mapGridToPagerPosition(position), checked);
       }
     }

     @Override
     public boolean isItemChecked(int position) {
       return mGridView.getCheckedItemPositions().get(mapPagerToGridPosition(position));
     }

     @Override
     public void onClearChoices() {
       onBulkCheckedChange();
     }
   }

   private DataSetObserver mPrimaryObserver = new DataSetObserver() {
     @Override
     public void onChanged() {
       if (mPagerAdapter != null) {
         mPagerAdapter.notifyDataSetChanged();
       }
     }

     @Override
     public void onInvalidated() {
       if (mPagerAdapter != null) {
         mPagerAdapter.notifyDataSetChanged();
       }
     }
   };

   private int pickFullscreenStartingPosition() {
     int firstVisiblePosition = mGridView.getFirstVisiblePosition();
     if (mLastCheckedPosition <= firstVisiblePosition
         || mLastCheckedPosition > mGridView.getLastVisiblePosition()) {
       return firstVisiblePosition;
     } else {
       return mLastCheckedPosition;
     }
   }

   private void setSwitcherMenuState(MenuItem menuItem, boolean inFullscreenMode) {
     if (menuItem == null) {
       return;
     }
     if (!inFullscreenMode) {
       menuItem.setIcon(android.R.drawable.ic_menu_zoom);
       menuItem.setTitle(R.string.ingest_switch_photo_fullscreen);
     } else {
       menuItem.setIcon(android.R.drawable.ic_dialog_dialer);
       menuItem.setTitle(R.string.ingest_switch_photo_grid);
     }
   }

   private void setFullscreenPagerVisibility(boolean visible) {
     mFullscreenPagerVisible = visible;
     if (visible) {
       if (mPagerAdapter == null) {
         mPagerAdapter = new MtpPagerAdapter(this, mPositionMappingCheckBroker);
         mPagerAdapter.setMtpDeviceIndex(mAdapter.getMtpDeviceIndex());
       }
       mFullscreenPager.setAdapter(mPagerAdapter);
       mFullscreenPager.setCurrentItem(mPagerAdapter.translatePositionWithLabels(
           pickFullscreenStartingPosition()), false);
     } else if (mPagerAdapter != null) {
       mGridView.setSelection(mAdapter.translatePositionWithoutLabels(
           mFullscreenPager.getCurrentItem()));
       mFullscreenPager.setAdapter(null);
     }
     mGridView.setVisibility(visible ? View.INVISIBLE : View.VISIBLE);
     mFullscreenPager.setVisibility(visible ? View.VISIBLE : View.INVISIBLE);
     if (mActionMenuSwitcherItem != null) {
       setSwitcherMenuState(mActionMenuSwitcherItem, visible);
     }
     setSwitcherMenuState(mMenuSwitcherItem, visible);
   }

   private void setSwitcherMenuVisibility(boolean visible) {
     if (mActionMenuSwitcherItem != null) {
       mActionMenuSwitcherItem.setVisible(visible);
     }
     if (mMenuSwitcherItem != null) {
       mMenuSwitcherItem.setVisible(visible);
     }
   }

   private void updateWarningView() {
     if (!mAdapter.deviceConnected()) {
       showWarningView(R.string.ingest_no_device);
     } else if (mAdapter.indexReady() && mAdapter.getCount() == 0) {
       showWarningView(R.string.ingest_empty_device);
     } else {
       hideWarningView();
     }
   }

   private void uiThreadNotifyIndexChanged() {
     mAdapter.notifyDataSetChanged();
     if (mActiveActionMode != null) {
       mActiveActionMode.finish();
       mActiveActionMode = null;
     }
     updateWarningView();
   }

   protected void notifyIndexChanged() {
     mHandler.sendEmptyMessage(ItemListHandler.MSG_NOTIFY_CHANGED);
   }

   private static class ProgressState {
     String message;
     String title;
     int current;
     int max;

     public void reset() {
       title = null;
       message = null;
       current = 0;
       max = 0;
     }
   }

   private ProgressState mProgressState = new ProgressState();

   @Override
   public void onObjectIndexed(IngestObjectInfo object, int numVisited) {
     // Not guaranteed to be called on the UI thread
     mProgressState.reset();
     mProgressState.max = 0;
     mProgressState.message = getResources().getQuantityString(
         R.plurals.ingest_number_of_items_scanned, numVisited, numVisited);
     mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_UPDATE);
   }

   @Override
   public void onSortingStarted() {
     // Not guaranteed to be called on the UI thread
     mProgressState.reset();
     mProgressState.max = 0;
     mProgressState.message = getResources().getString(R.string.ingest_sorting);
     mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_UPDATE);
   }

   @Override
   public void onIndexingFinished() {
     // Not guaranteed to be called on the UI thread
     mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_HIDE);
     mHandler.sendEmptyMessage(ItemListHandler.MSG_NOTIFY_CHANGED);
   }

   @Override
   public void onImportProgress(final int visitedCount, final int totalCount,
       String pathIfSuccessful) {
     // Not guaranteed to be called on the UI thread
     mProgressState.reset();
     mProgressState.max = totalCount;
     mProgressState.current = visitedCount;
     mProgressState.title = getResources().getString(R.string.ingest_importing);
     mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_UPDATE);
     mHandler.removeMessages(ItemListHandler.MSG_PROGRESS_INDETERMINATE);
     mHandler.sendEmptyMessageDelayed(ItemListHandler.MSG_PROGRESS_INDETERMINATE,
         INDETERMINATE_SWITCH_TIMEOUT_MS);
   }

   @Override
   public void onImportFinish(Collection<IngestObjectInfo> objectsNotImported,
       int numVisited) {
     // Not guaranteed to be called on the UI thread
     mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_HIDE);
     mHandler.removeMessages(ItemListHandler.MSG_PROGRESS_INDETERMINATE);
     // TODO(georgescu): maybe show an extra dialog listing the ones that failed
     // importing, if any?
   }

   private ProgressDialog getProgressDialog() {
     if (mProgressDialog == null || !mProgressDialog.isShowing()) {
       mProgressDialog = new ProgressDialog(this);
       mProgressDialog.setCancelable(false);
     }
     return mProgressDialog;
   }

   private void updateProgressDialog() {
     ProgressDialog dialog = getProgressDialog();
     boolean indeterminate = (mProgressState.max == 0);
     dialog.setIndeterminate(indeterminate);
     dialog.setProgressStyle(indeterminate ? ProgressDialog.STYLE_SPINNER
         : ProgressDialog.STYLE_HORIZONTAL);
     if (mProgressState.title != null) {
       dialog.setTitle(mProgressState.title);
     }
     if (mProgressState.message != null) {
       dialog.setMessage(mProgressState.message);
     }
     if (!indeterminate) {
       dialog.setProgress(mProgressState.current);
       dialog.setMax(mProgressState.max);
     }
     if (!dialog.isShowing()) {
       dialog.show();
     }
   }

   private void makeProgressDialogIndeterminate() {
     ProgressDialog dialog = getProgressDialog();
     dialog.setIndeterminate(true);
   }

   private void cleanupProgressDialog() {
     if (mProgressDialog != null) {
       mProgressDialog.dismiss();
       mProgressDialog = null;
     }
   }

   // This is static and uses a WeakReference in order to avoid leaking the Activity
   private static class ItemListHandler extends Handler {
     public static final int MSG_PROGRESS_UPDATE = 0;
     public static final int MSG_PROGRESS_HIDE = 1;
     public static final int MSG_NOTIFY_CHANGED = 2;
     public static final int MSG_BULK_CHECKED_CHANGE = 3;
     public static final int MSG_PROGRESS_INDETERMINATE = 4;

     WeakReference<IngestActivity> mParentReference;

     public ItemListHandler(IngestActivity parent) {
       super();
       mParentReference = new WeakReference<IngestActivity>(parent);
     }

     @Override
     public void handleMessage(Message message) {
       IngestActivity parent = mParentReference.get();
       if (parent == null || !parent.mActive) {
         return;
       }
       switch (message.what) {
         case MSG_PROGRESS_HIDE:
           parent.cleanupProgressDialog();
           break;
         case MSG_PROGRESS_UPDATE:
           parent.updateProgressDialog();
           break;
         case MSG_NOTIFY_CHANGED:
           parent.uiThreadNotifyIndexChanged();
           break;
         case MSG_BULK_CHECKED_CHANGE:
           parent.mPositionMappingCheckBroker.onBulkCheckedChange();
           break;
         case MSG_PROGRESS_INDETERMINATE:
           parent.makeProgressDialogIndeterminate();
           break;
         default:
           break;
       }
     }
   }

   private ServiceConnection mHelperServiceConnection = new ServiceConnection() {
     @Override
     public void onServiceConnected(ComponentName className, IBinder service) {
       mHelperService = ((IngestService.LocalBinder) service).getService();
       mHelperService.setClientActivity(IngestActivity.this);
       MtpDeviceIndex index = mHelperService.getIndex();
       mAdapter.setMtpDeviceIndex(index);
       if (mPagerAdapter != null) {
         mPagerAdapter.setMtpDeviceIndex(index);
       }
     }

     @Override
     public void onServiceDisconnected(ComponentName className) {
       mHelperService = null;
     }
   };

   private void doBindHelperService() {
     bindService(new Intent(getApplicationContext(), IngestService.class),
         mHelperServiceConnection, Context.BIND_AUTO_CREATE);
   }

   private void doUnbindHelperService() {
     if (mHelperService != null) {
       mHelperService.setClientActivity(null);
       unbindService(mHelperServiceConnection);
     }
   }
 }
	/*
	* Copyright (C) 2013 The Android Open Source Project
	*
	* 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.android.gallery3d.ingest;

	import com.android.gallery3d.R;
	import com.android.gallery3d.ingest.adapter.CheckBroker;
	import com.android.gallery3d.ingest.adapter.MtpAdapter;
	import com.android.gallery3d.ingest.adapter.MtpPagerAdapter;
	import com.android.gallery3d.ingest.data.ImportTask;
	import com.android.gallery3d.ingest.data.IngestObjectInfo;
	import com.android.gallery3d.ingest.data.MtpBitmapFetch;
	import com.android.gallery3d.ingest.data.MtpDeviceIndex;
	import com.android.gallery3d.ingest.ui.DateTileView;
	import com.android.gallery3d.ingest.ui.IngestGridView;
	import com.android.gallery3d.ingest.ui.IngestGridView.OnClearChoicesListener;

	import android.annotation.TargetApi;
	import android.app.Activity;
	import android.app.ProgressDialog;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.Intent;
	import android.content.ServiceConnection;
	import android.content.res.Configuration;
	import android.database.DataSetObserver;
	import android.os.Build;
	import android.os.Bundle;
	import android.os.Handler;
	import android.os.IBinder;
	import android.os.Message;
	import androidx.viewpager.widget.ViewPager;
	import android.util.SparseBooleanArray;
	import android.view.ActionMode;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.View;
	import android.widget.AbsListView.MultiChoiceModeListener;
	import android.widget.AdapterView;
	import android.widget.AdapterView.OnItemClickListener;
	import android.widget.TextView;

	import java.lang.ref.WeakReference;
	import java.util.Collection;

	/**
	* MTP importer, main activity.
	*/
	@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)
	public class IngestActivity extends Activity implements
	MtpDeviceIndex.ProgressListener, ImportTask.Listener {

	private IngestService mHelperService;
	private boolean mActive = false;
	private IngestGridView mGridView;
	private MtpAdapter mAdapter;
	private Handler mHandler;
	private ProgressDialog mProgressDialog;
	private ActionMode mActiveActionMode;

	private View mWarningView;
	private TextView mWarningText;
	private int mLastCheckedPosition = 0;

	private ViewPager mFullscreenPager;
	private MtpPagerAdapter mPagerAdapter;
	private boolean mFullscreenPagerVisible = false;

	private MenuItem mMenuSwitcherItem;
	private MenuItem mActionMenuSwitcherItem;

	// The MTP framework components don't give us fine-grained file copy
	// progress updates, so for large photos and videos, we will be stuck
	// with a dialog not updating for a long time. To give the user feedback,
	// we switch to the animated indeterminate progress bar after the timeout
	// specified by INDETERMINATE_SWITCH_TIMEOUT_MS. On the next update from
	// the framework, we switch back to the normal progress bar.
	private static final int INDETERMINATE_SWITCH_TIMEOUT_MS = 3000;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	doBindHelperService();

	setContentView(R.layout.ingest_activity_item_list);
	mGridView = (IngestGridView) findViewById(R.id.ingest_gridview);
	mAdapter = new MtpAdapter(this);
	mAdapter.registerDataSetObserver(mPrimaryObserver);
	mGridView.setAdapter(mAdapter);
	mGridView.setMultiChoiceModeListener(mMultiChoiceModeListener);
	mGridView.setOnItemClickListener(mOnItemClickListener);
	mGridView.setOnClearChoicesListener(mPositionMappingCheckBroker);

	mFullscreenPager = (ViewPager) findViewById(R.id.ingest_view_pager);

	mHandler = new ItemListHandler(this);

	MtpBitmapFetch.configureForContext(this);
	}

	private OnItemClickListener mOnItemClickListener = new OnItemClickListener() {
	@Override
	public void onItemClick(AdapterView<?> adapterView, View itemView, int position,
	long arg3) {
	mLastCheckedPosition = position;
	mGridView.setItemChecked(position, !mGridView.getCheckedItemPositions().get(position));
	}
	};

	private MultiChoiceModeListener mMultiChoiceModeListener = new MultiChoiceModeListener() {
	private boolean mIgnoreItemCheckedStateChanges = false;

	private void updateSelectedTitle(ActionMode mode) {
	int count = mGridView.getCheckedItemCount();
	mode.setTitle(getResources().getQuantityString(
	R.plurals.ingest_number_of_items_selected, count, count));
	}

	@Override
	public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
	boolean checked) {
	if (mIgnoreItemCheckedStateChanges) {
	return;
	}
	if (mAdapter.itemAtPositionIsBucket(position)) {
	SparseBooleanArray checkedItems = mGridView.getCheckedItemPositions();
	mIgnoreItemCheckedStateChanges = true;
	mGridView.setItemChecked(position, false);

	// Takes advantage of the fact that SectionIndexer imposes the
	// need to clamp to the valid range
	int nextSectionStart = mAdapter.getPositionForSection(
	mAdapter.getSectionForPosition(position) + 1);
	if (nextSectionStart == position) {
	nextSectionStart = mAdapter.getCount();
	}

	boolean rangeValue = false; // Value we want to set all of the bucket items to

	// Determine if all the items in the bucket are currently checked, so that we
	// can uncheck them, otherwise we will check all items in the bucket.
	for (int i = position + 1; i < nextSectionStart; i++) {
	if (!checkedItems.get(i)) {
	rangeValue = true;
	break;
	}
	}

	// Set all items in the bucket to the desired state
	for (int i = position + 1; i < nextSectionStart; i++) {
	if (checkedItems.get(i) != rangeValue) {
	mGridView.setItemChecked(i, rangeValue);
	}
	}

	mPositionMappingCheckBroker.onBulkCheckedChange();
	mIgnoreItemCheckedStateChanges = false;
	} else {
	mPositionMappingCheckBroker.onCheckedChange(position, checked);
	}
	mLastCheckedPosition = position;
	updateSelectedTitle(mode);
	}

	@Override
	public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
	return onOptionsItemSelected(item);
	}

	@Override
	public boolean onCreateActionMode(ActionMode mode, Menu menu) {
	MenuInflater inflater = mode.getMenuInflater();
	inflater.inflate(R.menu.ingest_menu_item_list_selection, menu);
	updateSelectedTitle(mode);
	mActiveActionMode = mode;
	mActionMenuSwitcherItem = menu.findItem(R.id.ingest_switch_view);
	setSwitcherMenuState(mActionMenuSwitcherItem, mFullscreenPagerVisible);
	return true;
	}

	@Override
	public void onDestroyActionMode(ActionMode mode) {
	mActiveActionMode = null;
	mActionMenuSwitcherItem = null;
	mHandler.sendEmptyMessage(ItemListHandler.MSG_BULK_CHECKED_CHANGE);
	}

	@Override
	public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
	updateSelectedTitle(mode);
	return false;
	}
	};

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
	int id = item.getItemId();
	if (id == R.id.ingest_import_items) {
	if (mActiveActionMode != null) {
	mHelperService.importSelectedItems(
	mGridView.getCheckedItemPositions(),
	mAdapter);
	mActiveActionMode.finish();
	}
	return true;
	} else if (id == R.id.ingest_switch_view) {
	setFullscreenPagerVisibility(!mFullscreenPagerVisible);
	return true;
	} else {
	return false;
	}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
	MenuInflater inflater = getMenuInflater();
	inflater.inflate(R.menu.ingest_menu_item_list_selection, menu);
	mMenuSwitcherItem = menu.findItem(R.id.ingest_switch_view);
	menu.findItem(R.id.ingest_import_items).setVisible(false);
	setSwitcherMenuState(mMenuSwitcherItem, mFullscreenPagerVisible);
	return true;
	}

	@Override
	protected void onDestroy() {
	doUnbindHelperService();
	super.onDestroy();
	}

	@Override
	protected void onResume() {
	DateTileView.refreshLocale();
	mActive = true;
	if (mHelperService != null) {
	mHelperService.setClientActivity(this);
	}
	updateWarningView();
	super.onResume();
	}

	@Override
	protected void onPause() {
	if (mHelperService != null) {
	mHelperService.setClientActivity(null);
	}
	mActive = false;
	cleanupProgressDialog();
	super.onPause();
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
	super.onConfigurationChanged(newConfig);
	MtpBitmapFetch.configureForContext(this);
	}

	private void showWarningView(int textResId) {
	if (mWarningView == null) {
	mWarningView = findViewById(R.id.ingest_warning_view);
	mWarningText =
	(TextView) mWarningView.findViewById(R.id.ingest_warning_view_text);
	}
	mWarningText.setText(textResId);
	mWarningView.setVisibility(View.VISIBLE);
	setFullscreenPagerVisibility(false);
	mGridView.setVisibility(View.GONE);
	setSwitcherMenuVisibility(false);
	}

	private void hideWarningView() {
	if (mWarningView != null) {
	mWarningView.setVisibility(View.GONE);
	setFullscreenPagerVisibility(false);
	}
	setSwitcherMenuVisibility(true);
	}

	private PositionMappingCheckBroker mPositionMappingCheckBroker =
	new PositionMappingCheckBroker();

	private class PositionMappingCheckBroker extends CheckBroker
	implements OnClearChoicesListener {
	private int mLastMappingPager = -1;
	private int mLastMappingGrid = -1;

	private int mapPagerToGridPosition(int position) {
	if (position != mLastMappingPager) {
	mLastMappingPager = position;
	mLastMappingGrid = mAdapter.translatePositionWithoutLabels(position);
	}
	return mLastMappingGrid;
	}

	private int mapGridToPagerPosition(int position) {
	if (position != mLastMappingGrid) {
	mLastMappingGrid = position;
	mLastMappingPager = mPagerAdapter.translatePositionWithLabels(position);
	}
	return mLastMappingPager;
	}

	@Override
	public void setItemChecked(int position, boolean checked) {
	mGridView.setItemChecked(mapPagerToGridPosition(position), checked);
	}

	@Override
	public void onCheckedChange(int position, boolean checked) {
	if (mPagerAdapter != null) {
	super.onCheckedChange(mapGridToPagerPosition(position), checked);
	}
	}

	@Override
	public boolean isItemChecked(int position) {
	return mGridView.getCheckedItemPositions().get(mapPagerToGridPosition(position));
	}

	@Override
	public void onClearChoices() {
	onBulkCheckedChange();
	}
	}

	private DataSetObserver mPrimaryObserver = new DataSetObserver() {
	@Override
	public void onChanged() {
	if (mPagerAdapter != null) {
	mPagerAdapter.notifyDataSetChanged();
	}
	}

	@Override
	public void onInvalidated() {
	if (mPagerAdapter != null) {
	mPagerAdapter.notifyDataSetChanged();
	}
	}
	};

	private int pickFullscreenStartingPosition() {
	int firstVisiblePosition = mGridView.getFirstVisiblePosition();
	if (mLastCheckedPosition <= firstVisiblePosition
	\|\| mLastCheckedPosition > mGridView.getLastVisiblePosition()) {
	return firstVisiblePosition;
	} else {
	return mLastCheckedPosition;
	}
	}

	private void setSwitcherMenuState(MenuItem menuItem, boolean inFullscreenMode) {
	if (menuItem == null) {
	return;
	}
	if (!inFullscreenMode) {
	menuItem.setIcon(android.R.drawable.ic_menu_zoom);
	menuItem.setTitle(R.string.ingest_switch_photo_fullscreen);
	} else {
	menuItem.setIcon(android.R.drawable.ic_dialog_dialer);
	menuItem.setTitle(R.string.ingest_switch_photo_grid);
	}
	}

	private void setFullscreenPagerVisibility(boolean visible) {
	mFullscreenPagerVisible = visible;
	if (visible) {
	if (mPagerAdapter == null) {
	mPagerAdapter = new MtpPagerAdapter(this, mPositionMappingCheckBroker);
	mPagerAdapter.setMtpDeviceIndex(mAdapter.getMtpDeviceIndex());
	}
	mFullscreenPager.setAdapter(mPagerAdapter);
	mFullscreenPager.setCurrentItem(mPagerAdapter.translatePositionWithLabels(
	pickFullscreenStartingPosition()), false);
	} else if (mPagerAdapter != null) {
	mGridView.setSelection(mAdapter.translatePositionWithoutLabels(
	mFullscreenPager.getCurrentItem()));
	mFullscreenPager.setAdapter(null);
	}
	mGridView.setVisibility(visible ? View.INVISIBLE : View.VISIBLE);
	mFullscreenPager.setVisibility(visible ? View.VISIBLE : View.INVISIBLE);
	if (mActionMenuSwitcherItem != null) {
	setSwitcherMenuState(mActionMenuSwitcherItem, visible);
	}
	setSwitcherMenuState(mMenuSwitcherItem, visible);
	}

	private void setSwitcherMenuVisibility(boolean visible) {
	if (mActionMenuSwitcherItem != null) {
	mActionMenuSwitcherItem.setVisible(visible);
	}
	if (mMenuSwitcherItem != null) {
	mMenuSwitcherItem.setVisible(visible);
	}
	}

	private void updateWarningView() {
	if (!mAdapter.deviceConnected()) {
	showWarningView(R.string.ingest_no_device);
	} else if (mAdapter.indexReady() && mAdapter.getCount() == 0) {
	showWarningView(R.string.ingest_empty_device);
	} else {
	hideWarningView();
	}
	}

	private void uiThreadNotifyIndexChanged() {
	mAdapter.notifyDataSetChanged();
	if (mActiveActionMode != null) {
	mActiveActionMode.finish();
	mActiveActionMode = null;
	}
	updateWarningView();
	}

	protected void notifyIndexChanged() {
	mHandler.sendEmptyMessage(ItemListHandler.MSG_NOTIFY_CHANGED);
	}

	private static class ProgressState {
	String message;
	String title;
	int current;
	int max;

	public void reset() {
	title = null;
	message = null;
	current = 0;
	max = 0;
	}
	}

	private ProgressState mProgressState = new ProgressState();

	@Override
	public void onObjectIndexed(IngestObjectInfo object, int numVisited) {
	// Not guaranteed to be called on the UI thread
	mProgressState.reset();
	mProgressState.max = 0;
	mProgressState.message = getResources().getQuantityString(
	R.plurals.ingest_number_of_items_scanned, numVisited, numVisited);
	mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_UPDATE);
	}

	@Override
	public void onSortingStarted() {
	// Not guaranteed to be called on the UI thread
	mProgressState.reset();
	mProgressState.max = 0;
	mProgressState.message = getResources().getString(R.string.ingest_sorting);
	mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_UPDATE);
	}

	@Override
	public void onIndexingFinished() {
	// Not guaranteed to be called on the UI thread
	mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_HIDE);
	mHandler.sendEmptyMessage(ItemListHandler.MSG_NOTIFY_CHANGED);
	}

	@Override
	public void onImportProgress(final int visitedCount, final int totalCount,
	String pathIfSuccessful) {
	// Not guaranteed to be called on the UI thread
	mProgressState.reset();
	mProgressState.max = totalCount;
	mProgressState.current = visitedCount;
	mProgressState.title = getResources().getString(R.string.ingest_importing);
	mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_UPDATE);
	mHandler.removeMessages(ItemListHandler.MSG_PROGRESS_INDETERMINATE);
	mHandler.sendEmptyMessageDelayed(ItemListHandler.MSG_PROGRESS_INDETERMINATE,
	INDETERMINATE_SWITCH_TIMEOUT_MS);
	}

	@Override
	public void onImportFinish(Collection<IngestObjectInfo> objectsNotImported,
	int numVisited) {
	// Not guaranteed to be called on the UI thread
	mHandler.sendEmptyMessage(ItemListHandler.MSG_PROGRESS_HIDE);
	mHandler.removeMessages(ItemListHandler.MSG_PROGRESS_INDETERMINATE);
	// TODO(georgescu): maybe show an extra dialog listing the ones that failed
	// importing, if any?
	}

	private ProgressDialog getProgressDialog() {
	if (mProgressDialog == null \|\| !mProgressDialog.isShowing()) {
	mProgressDialog = new ProgressDialog(this);
	mProgressDialog.setCancelable(false);
	}
	return mProgressDialog;
	}

	private void updateProgressDialog() {
	ProgressDialog dialog = getProgressDialog();
	boolean indeterminate = (mProgressState.max == 0);
	dialog.setIndeterminate(indeterminate);
	dialog.setProgressStyle(indeterminate ? ProgressDialog.STYLE_SPINNER
	: ProgressDialog.STYLE_HORIZONTAL);
	if (mProgressState.title != null) {
	dialog.setTitle(mProgressState.title);
	}
	if (mProgressState.message != null) {
	dialog.setMessage(mProgressState.message);
	}
	if (!indeterminate) {
	dialog.setProgress(mProgressState.current);
	dialog.setMax(mProgressState.max);
	}
	if (!dialog.isShowing()) {
	dialog.show();
	}
	}

	private void makeProgressDialogIndeterminate() {
	ProgressDialog dialog = getProgressDialog();
	dialog.setIndeterminate(true);
	}

	private void cleanupProgressDialog() {
	if (mProgressDialog != null) {
	mProgressDialog.dismiss();
	mProgressDialog = null;
	}
	}

	// This is static and uses a WeakReference in order to avoid leaking the Activity
	private static class ItemListHandler extends Handler {
	public static final int MSG_PROGRESS_UPDATE = 0;
	public static final int MSG_PROGRESS_HIDE = 1;
	public static final int MSG_NOTIFY_CHANGED = 2;
	public static final int MSG_BULK_CHECKED_CHANGE = 3;
	public static final int MSG_PROGRESS_INDETERMINATE = 4;

	WeakReference<IngestActivity> mParentReference;

	public ItemListHandler(IngestActivity parent) {
	super();
	mParentReference = new WeakReference<IngestActivity>(parent);
	}

	@Override
	public void handleMessage(Message message) {
	IngestActivity parent = mParentReference.get();
	if (parent == null \|\| !parent.mActive) {
	return;
	}
	switch (message.what) {
	case MSG_PROGRESS_HIDE:
	parent.cleanupProgressDialog();
	break;
	case MSG_PROGRESS_UPDATE:
	parent.updateProgressDialog();
	break;
	case MSG_NOTIFY_CHANGED:
	parent.uiThreadNotifyIndexChanged();
	break;
	case MSG_BULK_CHECKED_CHANGE:
	parent.mPositionMappingCheckBroker.onBulkCheckedChange();
	break;
	case MSG_PROGRESS_INDETERMINATE:
	parent.makeProgressDialogIndeterminate();
	break;
	default:
	break;
	}
	}
	}

	private ServiceConnection mHelperServiceConnection = new ServiceConnection() {
	@Override
	public void onServiceConnected(ComponentName className, IBinder service) {
	mHelperService = ((IngestService.LocalBinder) service).getService();
	mHelperService.setClientActivity(IngestActivity.this);
	MtpDeviceIndex index = mHelperService.getIndex();
	mAdapter.setMtpDeviceIndex(index);
	if (mPagerAdapter != null) {
	mPagerAdapter.setMtpDeviceIndex(index);
	}
	}

	@Override
	public void onServiceDisconnected(ComponentName className) {
	mHelperService = null;
	}
	};

	private void doBindHelperService() {
	bindService(new Intent(getApplicationContext(), IngestService.class),
	mHelperServiceConnection, Context.BIND_AUTO_CREATE);
	}

	private void doUnbindHelperService() {
	if (mHelperService != null) {
	mHelperService.setClientActivity(null);
	unbindService(mHelperServiceConnection);
	}
	}
	}