Java tutorial
/* * Copyright (c) 2012 Hai Bison * * See the file LICENSE at the root directory of this project for copying * permission. */ package com.haibison.android.anhuu; import java.util.ArrayList; import android.content.Context; import android.database.Cursor; import android.net.Uri; import android.support.v4.widget.ResourceCursorAdapter; import android.util.Log; import android.util.SparseArray; import android.view.MotionEvent; import android.view.View; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.GridView; import android.widget.ImageView; import android.widget.TextView; import com.haibison.android.anhuu.providers.BaseFileProviderUtils; import com.haibison.android.anhuu.providers.basefile.BaseFileContract.BaseFile; import com.haibison.android.anhuu.utils.Converter; import com.haibison.android.anhuu.utils.DateUtils; import com.haibison.android.anhuu.utils.ui.ContextMenuUtils; import com.haibison.android.anhuu.utils.ui.LoadingDialog; import com.haibison.android.anhuu.utils.ui.UI; /** * Adapter of base file. * * @author Hai Bison * */ public class BaseFileAdapter extends ResourceCursorAdapter { /** * Used for debugging... */ private static final String CLASSNAME = BaseFileAdapter.class.getName(); /** * Listener for building context menu editor. * * @author Hai Bison * @since v5.1 beta */ public static interface OnBuildOptionsMenuListener { /** * Will be called after the user touched on the icon of the item. * * @param view * the view displaying the item. * @param cursor * the item which its icon has been touched. */ void onBuildOptionsMenu(View view, Cursor cursor); /** * Will be called after the user touched and held ("long click") on the * icon of the item. * * @param view * the view displaying the item. * @param cursor * the item which its icon has been touched. */ void onBuildAdvancedOptionsMenu(View view, Cursor cursor); }// OnBuildOptionsMenuListener private final int mFilterMode; private final Integer[] mAdvancedSelectionOptions; private boolean mMultiSelection; private OnBuildOptionsMenuListener mOnBuildOptionsMenuListener; public BaseFileAdapter(Context context, int filterMode, boolean multiSelection) { super(context, R.layout.anhuu_f5be488d_file_item, null, 0); mFilterMode = filterMode; mMultiSelection = multiSelection; switch (mFilterMode) { case BaseFile.FILTER_FILES_AND_DIRECTORIES: mAdvancedSelectionOptions = new Integer[] { R.string.anhuu_f5be488d_cmd_advanced_selection_all, R.string.anhuu_f5be488d_cmd_advanced_selection_none, R.string.anhuu_f5be488d_cmd_advanced_selection_invert, R.string.anhuu_f5be488d_cmd_select_all_files, R.string.anhuu_f5be488d_cmd_select_all_folders }; break;// FILTER_FILES_AND_DIRECTORIES default: mAdvancedSelectionOptions = new Integer[] { R.string.anhuu_f5be488d_cmd_advanced_selection_all, R.string.anhuu_f5be488d_cmd_advanced_selection_none, R.string.anhuu_f5be488d_cmd_advanced_selection_invert }; break;// FILTER_DIRECTORIES_ONLY and FILTER_FILES_ONLY } }// BaseFileAdapter() @Override public int getCount() { /* * The last item is used for information from the provider, we ignore * it. */ int count = super.getCount(); return count > 0 ? count - 1 : 0; }// getCount() /** * The "view holder" * * @author Hai Bison */ private static final class Bag { ImageView mImageIcon; ImageView mImageLockedSymbol; TextView mTxtFileName; TextView mTxtFileInfo; CheckBox mCheckboxSelection; }// Bag private static class BagInfo { boolean mChecked = false; boolean mMarkedAsDeleted = false; Uri mUri; }// BagChildInfo /** * Map of child IDs to {@link BagChildInfo}. */ private final SparseArray<BagInfo> mSelectedChildrenMap = new SparseArray<BagInfo>(); @Override public void bindView(View view, Context context, Cursor cursor) { Bag bag = (Bag) view.getTag(); if (bag == null) { bag = new Bag(); bag.mImageIcon = (ImageView) view.findViewById(R.id.anhuu_f5be488d_imageview_icon); bag.mImageLockedSymbol = (ImageView) view.findViewById(R.id.anhuu_f5be488d_imageview_locked_symbol); bag.mTxtFileName = (TextView) view.findViewById(R.id.anhuu_f5be488d_textview_filename); bag.mTxtFileInfo = (TextView) view.findViewById(R.id.anhuu_f5be488d_textview_file_info); bag.mCheckboxSelection = (CheckBox) view.findViewById(R.id.anhuu_f5be488d_checkbox_selection); view.setTag(bag); } final int id = cursor.getInt(cursor.getColumnIndex(BaseFile._ID)); final Uri uri = BaseFileProviderUtils.getUri(cursor); final BagInfo bagInfo; if (mSelectedChildrenMap.get(id) == null) { bagInfo = new BagInfo(); bagInfo.mUri = uri; mSelectedChildrenMap.put(id, bagInfo); } else bagInfo = mSelectedChildrenMap.get(id); /* * Update views. */ /* * Use single line for grid view, multiline for list view */ bag.mTxtFileName.setSingleLine(view.getParent() instanceof GridView); /* * File icon. */ bag.mImageLockedSymbol.setVisibility( cursor.getInt(cursor.getColumnIndex(BaseFile.COLUMN_CAN_READ)) > 0 ? View.GONE : View.VISIBLE); bag.mImageIcon.setImageResource(cursor.getInt(cursor.getColumnIndex(BaseFile.COLUMN_ICON_ID))); bag.mImageIcon.setOnTouchListener(mImageIconOnTouchListener); bag.mImageIcon.setOnClickListener( BaseFileProviderUtils.isDirectory(cursor) ? newImageIconOnClickListener(cursor.getPosition()) : null); /* * Filename. */ bag.mTxtFileName.setText(BaseFileProviderUtils.getFileName(cursor)); UI.strikeOutText(bag.mTxtFileName, bagInfo.mMarkedAsDeleted); /* * File info. */ String time = DateUtils.formatDate(context, cursor.getLong(cursor.getColumnIndex(BaseFile.COLUMN_MODIFICATION_TIME))); if (BaseFileProviderUtils.isFile(cursor)) bag.mTxtFileInfo.setText(String.format("%s, %s", Converter.bytesToStr(cursor.getLong(cursor.getColumnIndex(BaseFile.COLUMN_SIZE))), time)); else bag.mTxtFileInfo.setText(time); /* * Check box. */ if (mMultiSelection) { if (mFilterMode == BaseFile.FILTER_FILES_ONLY && BaseFileProviderUtils.isDirectory(cursor)) { bag.mCheckboxSelection.setVisibility(View.GONE); } else { bag.mCheckboxSelection.setVisibility(View.VISIBLE); bag.mCheckboxSelection.setOnCheckedChangeListener(null); bag.mCheckboxSelection.setChecked(bagInfo.mChecked); bag.mCheckboxSelection.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { bagInfo.mChecked = isChecked; }// onCheckedChanged() }); bag.mCheckboxSelection.setOnLongClickListener(mCheckboxSelectionOnLongClickListener); } } else bag.mCheckboxSelection.setVisibility(View.GONE); }// bindView() @Override public void changeCursor(Cursor cursor) { super.changeCursor(cursor); synchronized (mSelectedChildrenMap) { mSelectedChildrenMap.clear(); } }// changeCursor() /* * UTILITIES. */ /** * Sets the listener {@link OnBuildOptionsMenuListener}. * * @param listener * the listener. */ public void setBuildOptionsMenuListener(OnBuildOptionsMenuListener listener) { mOnBuildOptionsMenuListener = listener; }// setBuildOptionsMenuListener() /** * Gets the listener {@link OnBuildOptionsMenuListener}. * * @return the listener. */ public OnBuildOptionsMenuListener getOnBuildOptionsMenuListener() { return mOnBuildOptionsMenuListener; }// getOnBuildOptionsMenuListener() /** * Gets the short name of this path. * * @return the path name, can be {@code null} if there is no data. */ public String getPathName() { Cursor cursor = getCursor(); if (cursor == null || !cursor.moveToLast()) return null; return BaseFileProviderUtils.getFileName(cursor); }// getPathName() /** * Selects all items. * <p/> * <b>Note:</b> This will <i>not</i> notify data set for changes after done. * * @param fileType * can be {@code -1} for all file types; or one of * {@link BaseFile#FILE_TYPE_DIRECTORY}, * {@link BaseFile#FILE_TYPE_FILE}. * @param selected * {@code true} or {@code false}. */ private void asyncSelectAll(int fileType, boolean selected) { int count = getCount(); for (int i = 0; i < count; i++) { Cursor cursor = (Cursor) getItem(i); int itemFileType = cursor.getInt(cursor.getColumnIndex(BaseFile.COLUMN_TYPE)); if ((mFilterMode == BaseFile.FILTER_DIRECTORIES_ONLY && itemFileType == BaseFile.FILE_TYPE_FILE) || (mFilterMode == BaseFile.FILTER_FILES_ONLY && itemFileType == BaseFile.FILE_TYPE_DIRECTORY)) continue; final int id = cursor.getInt(cursor.getColumnIndex(BaseFile._ID)); BagInfo b = mSelectedChildrenMap.get(id); if (b == null) { b = new BagInfo(); b.mUri = BaseFileProviderUtils.getUri(cursor); mSelectedChildrenMap.put(id, b); } if (fileType >= 0 && itemFileType != fileType) b.mChecked = false; else if (b.mChecked != selected) b.mChecked = selected; } // for i }// asyncSelectAll() /** * Selects all items. * <p/> * <b>Note:</b> This calls {@link #notifyDataSetChanged()} when done. * * @param selected * {@code true} or {@code false}. */ public synchronized void selectAll(boolean selected) { asyncSelectAll(-1, selected); notifyDataSetChanged(); }// selectAll() /** * Inverts selection of all items. * <p/> * <b>Note:</b> This will <i>not</i> notify data set for changes after done. */ private void asyncInvertSelection() { int count = getCount(); for (int i = 0; i < count; i++) { Cursor cursor = (Cursor) getItem(i); int fileType = cursor.getInt(cursor.getColumnIndex(BaseFile.COLUMN_TYPE)); if ((mFilterMode == BaseFile.FILTER_DIRECTORIES_ONLY && fileType == BaseFile.FILE_TYPE_FILE) || (mFilterMode == BaseFile.FILTER_FILES_ONLY && fileType == BaseFile.FILE_TYPE_DIRECTORY)) continue; final int id = cursor.getInt(cursor.getColumnIndex(BaseFile._ID)); BagInfo b = mSelectedChildrenMap.get(id); if (b == null) { b = new BagInfo(); b.mUri = BaseFileProviderUtils.getUri(cursor); mSelectedChildrenMap.put(id, b); } b.mChecked = !b.mChecked; } // for i }// asyncInvertSelection() /** * Inverts selection of all items. * <p/> * <b>Note:</b> This calls {@link #notifyDataSetChanged()} after done. */ public synchronized void invertSelection() { asyncInvertSelection(); notifyDataSetChanged(); }// invertSelection() /** * Checks if item with {@code id} is selected or not. * * @param id * the database ID. * @return {@code true} or {@code false}. */ public boolean isSelected(int id) { synchronized (mSelectedChildrenMap) { return mSelectedChildrenMap.get(id) != null ? mSelectedChildrenMap.get(id).mChecked : false; } }// isSelected() /** * Gets selected items. * * @return list of URIs, can be empty. */ public ArrayList<Uri> getSelectedItems() { ArrayList<Uri> res = new ArrayList<Uri>(); synchronized (mSelectedChildrenMap) { for (int i = 0; i < mSelectedChildrenMap.size(); i++) if (mSelectedChildrenMap.get(mSelectedChildrenMap.keyAt(i)).mChecked) res.add(mSelectedChildrenMap.get(mSelectedChildrenMap.keyAt(i)).mUri); } return res; }// getSelectedItems() /** * Marks all selected items as deleted. * <p/> * <b>Note:</b> This calls {@link #notifyDataSetChanged()} after done. * * @param deleted * {@code true} or {@code false}. */ public void markSelectedItemsAsDeleted(boolean deleted) { synchronized (mSelectedChildrenMap) { for (int i = 0; i < mSelectedChildrenMap.size(); i++) if (mSelectedChildrenMap.get(mSelectedChildrenMap.keyAt(i)).mChecked) mSelectedChildrenMap.get(mSelectedChildrenMap.keyAt(i)).mMarkedAsDeleted = deleted; } notifyDataSetChanged(); }// markSelectedItemsAsDeleted() /** * Marks specified item as deleted. * <p/> * <b>Note:</b> This calls {@link #notifyDataSetChanged()} after done. * * @param id * the ID of the item. * @param deleted * {@code true} or {@code false}. */ public void markItemAsDeleted(int id, boolean deleted) { synchronized (mSelectedChildrenMap) { if (mSelectedChildrenMap.get(id) != null) { mSelectedChildrenMap.get(id).mMarkedAsDeleted = deleted; notifyDataSetChanged(); } } }// markItemAsDeleted() /* * LISTENERS */ /** * If the user touches the list item, and the image icon <i>declared</i> a * selector in XML, then that selector works. But we just want the selector * to work only when the user touches the image, hence this listener. */ private final View.OnTouchListener mImageIconOnTouchListener = new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if (BuildConfig.DEBUG) Log.d(CLASSNAME, "mImageIconOnTouchListener.onTouch() >> ACTION = " + event.getAction()); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: v.setBackgroundResource(R.drawable.anhuu_f5be488d_image_button_dark_pressed); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: v.setBackgroundResource(0); break; } return false; }// onTouch() };// mImageIconOnTouchListener /** * Creates new listener to handle click event of image icon. * * @param cursorPosition * the cursor position. * @return the listener. */ private View.OnClickListener newImageIconOnClickListener(final int cursorPosition) { return new View.OnClickListener() { @Override public void onClick(View v) { if (getOnBuildOptionsMenuListener() != null) getOnBuildOptionsMenuListener().onBuildOptionsMenu(v, (Cursor) getItem(cursorPosition)); }// onClick() }; }// newImageIconOnClickListener() private final View.OnLongClickListener mCheckboxSelectionOnLongClickListener = new View.OnLongClickListener() { @Override public boolean onLongClick(final View v) { ContextMenuUtils.showContextMenu(v.getContext(), 0, R.string.anhuu_f5be488d_title_advanced_selection, mAdvancedSelectionOptions, new ContextMenuUtils.OnMenuItemClickListener() { @Override public void onClick(final int resId) { new LoadingDialog<Void, Void, Void>(v.getContext(), R.string.anhuu_f5be488d_msg_loading, false) { @Override protected Void doInBackground(Void... params) { if (resId == R.string.anhuu_f5be488d_cmd_advanced_selection_all) asyncSelectAll(-1, true); else if (resId == R.string.anhuu_f5be488d_cmd_advanced_selection_none) asyncSelectAll(-1, false); else if (resId == R.string.anhuu_f5be488d_cmd_advanced_selection_invert) asyncInvertSelection(); else if (resId == R.string.anhuu_f5be488d_cmd_select_all_files) asyncSelectAll(BaseFile.FILE_TYPE_FILE, true); else if (resId == R.string.anhuu_f5be488d_cmd_select_all_folders) asyncSelectAll(BaseFile.FILE_TYPE_DIRECTORY, true); return null; }// doInBackground() @Override protected void onPostExecute(Void result) { super.onPostExecute(result); notifyDataSetChanged(); }// onPostExecute() }.execute(); }// onClick() }); return true; }// onLongClick() };// mCheckboxSelectionOnLongClickListener }