| /* |
| * Copyright (C) 2011 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 android.widget; |
| |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.PackageManager; |
| import android.content.pm.ResolveInfo; |
| import android.graphics.drawable.Drawable; |
| import android.util.TypedValue; |
| import android.view.ActionProvider; |
| import android.view.Menu; |
| import android.view.MenuItem; |
| import android.view.MenuItem.OnMenuItemClickListener; |
| import android.view.SubMenu; |
| import android.view.View; |
| import android.widget.ActivityChooserModel.OnChooseActivityListener; |
| |
| import com.android.internal.R; |
| |
| /** |
| * This is a provider for a share action. It is responsible for creating views |
| * that enable data sharing and also to show a sub menu with sharing activities |
| * if the hosting item is placed on the overflow menu. |
| * <p> |
| * Here is how to use the action provider with custom backing file in a {@link MenuItem}: |
| * </p> |
| * <pre> |
| * // In Activity#onCreateOptionsMenu |
| * public boolean onCreateOptionsMenu(Menu menu) { |
| * // Get the menu item. |
| * MenuItem menuItem = menu.findItem(R.id.my_menu_item); |
| * // Get the provider and hold onto it to set/change the share intent. |
| * mShareActionProvider = (ShareActionProvider) menuItem.getActionProvider(); |
| * // Set history different from the default before getting the action |
| * // view since a call to {@link MenuItem#getActionView() MenuItem.getActionView()} calls |
| * // {@link ActionProvider#onCreateActionView()} which uses the backing file name. Omit this |
| * // line if using the default share history file is desired. |
| * mShareActionProvider.setShareHistoryFileName("custom_share_history.xml"); |
| * . . . |
| * } |
| * |
| * // Somewhere in the application. |
| * public void doShare(Intent shareIntent) { |
| * // When you want to share set the share intent. |
| * mShareActionProvider.setShareIntent(shareIntent); |
| * }</pre> |
| * <p> |
| * <strong>Note:</strong> While the sample snippet demonstrates how to use this provider |
| * in the context of a menu item, the use of the provider is not limited to menu items. |
| * </p> |
| * |
| * @see ActionProvider |
| */ |
| public class ShareActionProvider extends ActionProvider { |
| |
| /** |
| * Listener for the event of selecting a share target. |
| */ |
| public interface OnShareTargetSelectedListener { |
| |
| /** |
| * Called when a share target has been selected. The client can |
| * decide whether to perform some action before the sharing is |
| * actually performed. |
| * <p> |
| * <strong>Note:</strong> Modifying the intent is not permitted and |
| * any changes to the latter will be ignored. |
| * </p> |
| * <p> |
| * <strong>Note:</strong> You should <strong>not</strong> handle the |
| * intent here. This callback aims to notify the client that a |
| * sharing is being performed, so the client can update the UI |
| * if necessary. |
| * </p> |
| * |
| * @param source The source of the notification. |
| * @param intent The intent for launching the chosen share target. |
| * @return The return result is ignored. Always return false for consistency. |
| */ |
| public boolean onShareTargetSelected(ShareActionProvider source, Intent intent); |
| } |
| |
| /** |
| * The default for the maximal number of activities shown in the sub-menu. |
| */ |
| private static final int DEFAULT_INITIAL_ACTIVITY_COUNT = 4; |
| |
| /** |
| * The the maximum number activities shown in the sub-menu. |
| */ |
| private int mMaxShownActivityCount = DEFAULT_INITIAL_ACTIVITY_COUNT; |
| |
| /** |
| * Listener for handling menu item clicks. |
| */ |
| private final ShareMenuItemOnMenuItemClickListener mOnMenuItemClickListener = |
| new ShareMenuItemOnMenuItemClickListener(); |
| |
| /** |
| * The default name for storing share history. |
| */ |
| public static final String DEFAULT_SHARE_HISTORY_FILE_NAME = "share_history.xml"; |
| |
| /** |
| * Context for accessing resources. |
| */ |
| private final Context mContext; |
| |
| /** |
| * The name of the file with share history data. |
| */ |
| private String mShareHistoryFileName = DEFAULT_SHARE_HISTORY_FILE_NAME; |
| |
| private OnShareTargetSelectedListener mOnShareTargetSelectedListener; |
| |
| private OnChooseActivityListener mOnChooseActivityListener; |
| |
| /** |
| * Creates a new instance. |
| * |
| * @param context Context for accessing resources. |
| */ |
| public ShareActionProvider(Context context) { |
| super(context); |
| mContext = context; |
| } |
| |
| /** |
| * Sets a listener to be notified when a share target has been selected. |
| * The listener can optionally decide to handle the selection and |
| * not rely on the default behavior which is to launch the activity. |
| * <p> |
| * <strong>Note:</strong> If you choose the backing share history file |
| * you will still be notified in this callback. |
| * </p> |
| * @param listener The listener. |
| */ |
| public void setOnShareTargetSelectedListener(OnShareTargetSelectedListener listener) { |
| mOnShareTargetSelectedListener = listener; |
| setActivityChooserPolicyIfNeeded(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public View onCreateActionView() { |
| // Create the view and set its data model. |
| ActivityChooserView activityChooserView = new ActivityChooserView(mContext); |
| if (!activityChooserView.isInEditMode()) { |
| ActivityChooserModel dataModel = ActivityChooserModel.get(mContext, mShareHistoryFileName); |
| activityChooserView.setActivityChooserModel(dataModel); |
| } |
| |
| // Lookup and set the expand action icon. |
| TypedValue outTypedValue = new TypedValue(); |
| mContext.getTheme().resolveAttribute(R.attr.actionModeShareDrawable, outTypedValue, true); |
| Drawable drawable = mContext.getDrawable(outTypedValue.resourceId); |
| activityChooserView.setExpandActivityOverflowButtonDrawable(drawable); |
| activityChooserView.setProvider(this); |
| |
| // Set content description. |
| activityChooserView.setDefaultActionButtonContentDescription( |
| R.string.shareactionprovider_share_with_application); |
| activityChooserView.setExpandActivityOverflowButtonContentDescription( |
| R.string.shareactionprovider_share_with); |
| |
| return activityChooserView; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean hasSubMenu() { |
| return true; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void onPrepareSubMenu(SubMenu subMenu) { |
| // Clear since the order of items may change. |
| subMenu.clear(); |
| |
| ActivityChooserModel dataModel = ActivityChooserModel.get(mContext, mShareHistoryFileName); |
| PackageManager packageManager = mContext.getPackageManager(); |
| |
| final int expandedActivityCount = dataModel.getActivityCount(); |
| final int collapsedActivityCount = Math.min(expandedActivityCount, mMaxShownActivityCount); |
| |
| // Populate the sub-menu with a sub set of the activities. |
| for (int i = 0; i < collapsedActivityCount; i++) { |
| ResolveInfo activity = dataModel.getActivity(i); |
| subMenu.add(0, i, i, activity.loadLabel(packageManager)) |
| .setIcon(activity.loadIcon(packageManager)) |
| .setOnMenuItemClickListener(mOnMenuItemClickListener); |
| } |
| |
| if (collapsedActivityCount < expandedActivityCount) { |
| // Add a sub-menu for showing all activities as a list item. |
| SubMenu expandedSubMenu = subMenu.addSubMenu(Menu.NONE, collapsedActivityCount, |
| collapsedActivityCount, |
| mContext.getString(R.string.activity_chooser_view_see_all)); |
| for (int i = 0; i < expandedActivityCount; i++) { |
| ResolveInfo activity = dataModel.getActivity(i); |
| expandedSubMenu.add(0, i, i, activity.loadLabel(packageManager)) |
| .setIcon(activity.loadIcon(packageManager)) |
| .setOnMenuItemClickListener(mOnMenuItemClickListener); |
| } |
| } |
| } |
| |
| /** |
| * Sets the file name of a file for persisting the share history which |
| * history will be used for ordering share targets. This file will be used |
| * for all view created by {@link #onCreateActionView()}. Defaults to |
| * {@link #DEFAULT_SHARE_HISTORY_FILE_NAME}. Set to <code>null</code> |
| * if share history should not be persisted between sessions. |
| * <p> |
| * <strong>Note:</strong> The history file name can be set any time, however |
| * only the action views created by {@link #onCreateActionView()} after setting |
| * the file name will be backed by the provided file. Therefore, if you want to |
| * use different history files for sharing specific types of content, every time |
| * you change the history file {@link #setShareHistoryFileName(String)} you must |
| * call {@link android.app.Activity#invalidateOptionsMenu()} to recreate the |
| * action view. You should <strong>not</strong> call |
| * {@link android.app.Activity#invalidateOptionsMenu()} from |
| * {@link android.app.Activity#onCreateOptionsMenu(Menu)}. |
| * </p> |
| * <pre> |
| * private void doShare(Intent intent) { |
| * if (IMAGE.equals(intent.getMimeType())) { |
| * mShareActionProvider.setHistoryFileName(SHARE_IMAGE_HISTORY_FILE_NAME); |
| * } else if (TEXT.equals(intent.getMimeType())) { |
| * mShareActionProvider.setHistoryFileName(SHARE_TEXT_HISTORY_FILE_NAME); |
| * } |
| * mShareActionProvider.setIntent(intent); |
| * invalidateOptionsMenu(); |
| * }</pre> |
| * @param shareHistoryFile The share history file name. |
| */ |
| public void setShareHistoryFileName(String shareHistoryFile) { |
| mShareHistoryFileName = shareHistoryFile; |
| setActivityChooserPolicyIfNeeded(); |
| } |
| |
| /** |
| * Sets an intent with information about the share action. Here is a |
| * sample for constructing a share intent: |
| * <pre> |
| * Intent shareIntent = new Intent(Intent.ACTION_SEND); |
| * shareIntent.setType("image/*"); |
| * Uri uri = Uri.fromFile(new File(getFilesDir(), "foo.jpg")); |
| * shareIntent.putExtra(Intent.EXTRA_STREAM, uri));</pre> |
| * |
| * @param shareIntent The share intent. |
| * |
| * @see Intent#ACTION_SEND |
| * @see Intent#ACTION_SEND_MULTIPLE |
| */ |
| public void setShareIntent(Intent shareIntent) { |
| if (shareIntent != null) { |
| final String action = shareIntent.getAction(); |
| if (Intent.ACTION_SEND.equals(action) || Intent.ACTION_SEND_MULTIPLE.equals(action)) { |
| shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT | |
| Intent.FLAG_ACTIVITY_MULTIPLE_TASK); |
| } |
| } |
| ActivityChooserModel dataModel = ActivityChooserModel.get(mContext, |
| mShareHistoryFileName); |
| dataModel.setIntent(shareIntent); |
| } |
| |
| /** |
| * Reusable listener for handling share item clicks. |
| */ |
| private class ShareMenuItemOnMenuItemClickListener implements OnMenuItemClickListener { |
| @Override |
| public boolean onMenuItemClick(MenuItem item) { |
| ActivityChooserModel dataModel = ActivityChooserModel.get(mContext, |
| mShareHistoryFileName); |
| final int itemId = item.getItemId(); |
| Intent launchIntent = dataModel.chooseActivity(itemId); |
| if (launchIntent != null) { |
| final String action = launchIntent.getAction(); |
| if (Intent.ACTION_SEND.equals(action) || |
| Intent.ACTION_SEND_MULTIPLE.equals(action)) { |
| launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT | |
| Intent.FLAG_ACTIVITY_MULTIPLE_TASK); |
| } |
| mContext.startActivity(launchIntent); |
| } |
| return true; |
| } |
| } |
| |
| /** |
| * Set the activity chooser policy of the model backed by the current |
| * share history file if needed which is if there is a registered callback. |
| */ |
| private void setActivityChooserPolicyIfNeeded() { |
| if (mOnShareTargetSelectedListener == null) { |
| return; |
| } |
| if (mOnChooseActivityListener == null) { |
| mOnChooseActivityListener = new ShareActivityChooserModelPolicy(); |
| } |
| ActivityChooserModel dataModel = ActivityChooserModel.get(mContext, mShareHistoryFileName); |
| dataModel.setOnChooseActivityListener(mOnChooseActivityListener); |
| } |
| |
| /** |
| * Policy that delegates to the {@link OnShareTargetSelectedListener}, if such. |
| */ |
| private class ShareActivityChooserModelPolicy implements OnChooseActivityListener { |
| @Override |
| public boolean onChooseActivity(ActivityChooserModel host, Intent intent) { |
| if (mOnShareTargetSelectedListener != null) { |
| mOnShareTargetSelectedListener.onShareTargetSelected( |
| ShareActionProvider.this, intent); |
| } |
| return false; |
| } |
| } |
| } |