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ContactListView.java：源码内容
							/*
 * Copyright (C) 2007-2008 Esmertec AG.
 * Copyright (C) 2007-2008 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.im.app;
import com.android.im.IChatSession;
import com.android.im.IChatSessionManager;
import com.android.im.IContactListListener;
import com.android.im.IContactListManager;
import com.android.im.IImConnection;
import com.android.im.ISubscriptionListener;
import com.android.im.R;
import com.android.im.app.adapter.ContactListListenerAdapter;
import com.android.im.engine.Contact;
import com.android.im.engine.ContactListManager;
import com.android.im.engine.ImErrorInfo;
import com.android.im.service.ImServiceConstants;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentUris;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Resources;
import android.database.Cursor;
import android.net.Uri;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.RemoteException;
import android.provider.Im;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.LinearLayout;
import android.widget.ExpandableListView.OnChildClickListener;
public class ContactListView extends LinearLayout {
    Activity mScreen;
    IImConnection mConn;
    SimpleAlertHandler mHandler;
    private final IContactListListener mContactListListener;
    UserPresenceView mPresenceView;
    ExpandableListView mContactsList;
    private ContactListTreeAdapter mAdapter;
    private boolean mHideOfflineContacts;
    private SavedState mSavedState;
    public ContactListView(Context screen, AttributeSet attrs) {
        super(screen, attrs);
        mScreen = (Activity)screen;
        mHandler = new SimpleAlertHandler(mScreen);
        mContactListListener = new MyContactListListener(mHandler);
    }
    private class MyContactListListener extends ContactListListenerAdapter {
        public MyContactListListener(SimpleAlertHandler handler) {
            super(handler);
        }
        @Override
        public void onAllContactListsLoaded() {
            if (mAdapter != null) {
                mAdapter.startAutoRequery();
            }
        }
    }
    private final ISubscriptionListener.Stub mSubscriptionListener = new ISubscriptionListener.Stub() {
        public void onSubScriptionRequest(Contact from) {
            querySubscription();
        }
        public void onSubscriptionApproved(String contact) {
            querySubscription();
        }
        public void onSubscriptionDeclined(String contact) {
            querySubscription();
        }
        private void querySubscription() {
            if (mAdapter != null) {
                mAdapter.startQuerySubscriptions();
            }
        }
     };
    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        mPresenceView = (UserPresenceView)findViewById(R.id.userPresence);
        mContactsList = (ExpandableListView) findViewById(R.id.contactsList);
        mContactsList.setOnChildClickListener(mOnChildClickListener);
    }
    public ExpandableListView getListView() {
        return mContactsList;
    }
    public void setConnection(IImConnection conn) {
        if (mConn != conn) {
            if (mConn != null) {
                unregisterListeners();
            }
            mConn = conn;
            if (conn != null) {
                registerListeners();
                mPresenceView.setConnection(conn);
                if (mAdapter == null) {
                    mAdapter = new ContactListTreeAdapter(conn, mScreen);
                    mAdapter.setHideOfflineContacts(mHideOfflineContacts);
                    mContactsList.setAdapter(mAdapter);
                    mContactsList.setOnScrollListener(mAdapter);
                    if (mSavedState != null) {
                        int[] expandedGroups = mSavedState.mExpandedGroups;
                        if(expandedGroups != null) {
                            for (int group : expandedGroups) {
                                mContactsList.expandGroup(group);
                            }
                        }
                    }
                } else {
                    mAdapter.changeConnection(conn);
                }
                try {
                    IContactListManager listMgr = conn.getContactListManager();
                    if (listMgr.getState() == ContactListManager.LISTS_LOADED) {
                        mAdapter.startAutoRequery();
                    }
                } catch (RemoteException e) {
                    Log.e(ImApp.LOG_TAG, "Service died!");
                }
            }
        } else {
            mContactsList.invalidateViews();
        }
    }
    public void setHideOfflineContacts(boolean hide) {
        if (mAdapter != null) {
            mAdapter.setHideOfflineContacts(hide);
        } else {
            mHideOfflineContacts = hide;
        }
    }
    public void startChat() {
        startChat(getSelectedContact());
    }
    public void startChatAtPosition(long packedPosition) {
        startChat(getContactAtPosition(packedPosition));
    }
    void startChat(Cursor c) {
        if (c != null) {
            long id = c.getLong(c.getColumnIndexOrThrow(Im.Contacts._ID));
            String username = c.getString(c.getColumnIndexOrThrow(Im.Contacts.USERNAME));
            try {
                IChatSessionManager manager = mConn.getChatSessionManager();
                IChatSession session = manager.getChatSession(username);
                if(session == null) {
                    manager.createChatSession(username);
                }
                Uri data = ContentUris.withAppendedId(Im.Chats.CONTENT_URI, id);
                Intent i = new Intent(Intent.ACTION_VIEW, data);
                mScreen.startActivity(i);
            } catch (RemoteException e) {
                mHandler.showServiceErrorAlert();
            }
            clearFocusIfEmpty(c);
        }
    }
    private void clearFocusIfEmpty(Cursor c) {
        // clear focus if there's only one item so that it would focus on the
        // "empty" item after the contact removed.
        if (c.getCount() == 1) {
            clearFocus();
        }
    }
    public void endChat() {
        endChat(getSelectedContact());
    }
    public void endChatAtPosition(long packedPosition) {
        endChat(getContactAtPosition(packedPosition));
    }
    void endChat(Cursor c) {
        if(c != null) {
            String username = c.getString(c.getColumnIndexOrThrow(Im.Contacts.USERNAME));
            try {
                IChatSessionManager manager = mConn.getChatSessionManager();
                IChatSession session = manager.getChatSession(username);
                if(session != null) {
                    session.leave();
                }
            } catch (RemoteException e) {
                mHandler.showServiceErrorAlert();
            }
            clearFocusIfEmpty(c);
        }
    }
    public void viewContactPresence() {
        viewContactPresence(getSelectedContact());
    }
    public void viewContactPresenceAtPostion(long packedPosition) {
        viewContactPresence(getContactAtPosition(packedPosition));
    }
    public void viewContactPresence(Cursor c) {
        if (c != null) {
            long id = c.getLong(c.getColumnIndexOrThrow(Im.Contacts._ID));
            Uri data = ContentUris.withAppendedId(Im.Contacts.CONTENT_URI, id);
            Intent i = new Intent(Intent.ACTION_VIEW, data);
            mScreen.startActivity(i);
        }
    }
    public boolean isContactAtPosition(long packedPosition) {
        int type = ExpandableListView.getPackedPositionType(packedPosition);
        int groupPosition = ExpandableListView.getPackedPositionGroup(packedPosition);
        return (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD)
                && !mAdapter.isPosForSubscription(groupPosition);
    }
    public boolean isContactSelected() {
        long pos = mContactsList.getSelectedPosition();
        return isContactAtPosition(pos);
    }
    public boolean isConversationAtPosition(long packedPosition) {
        int type = ExpandableListView.getPackedPositionType(packedPosition);
        int groupPosition = ExpandableListView.getPackedPositionGroup(packedPosition);
        return (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD)
                && mAdapter.isPosForOngoingConversation(groupPosition);
    }
    public boolean isConversationSelected () {
        long pos = mContactsList.getSelectedPosition();
        return isConversationAtPosition(pos);
    }
    public boolean isContactsLoaded() {
        try {
            IContactListManager manager = mConn.getContactListManager();
            return (manager.getState() == ContactListManager.LISTS_LOADED);
        } catch (RemoteException e) {
            mHandler.showServiceErrorAlert();
            return false;
        }
    }
    public void removeContact() {
        removeContact(getSelectedContact());
    }
    public void removeContactAtPosition(long packedPosition) {
        removeContact(getContactAtPosition(packedPosition));
    }
    void removeContact(Cursor c) {
        if (c == null) {
            mHandler.showAlert(R.string.error, R.string.select_contact);
        } else {
            String nickname = c.getString(c.getColumnIndexOrThrow(Im.Contacts.NICKNAME));
            final String address = c.getString(c.getColumnIndexOrThrow(Im.Contacts.USERNAME));
            DialogInterface.OnClickListener confirmListener = new DialogInterface.OnClickListener(){
                public void onClick(DialogInterface dialog, int whichButton) {
                    try {
                        IContactListManager manager = mConn.getContactListManager();
                        int res = manager.removeContact(address);
                        if (res != ImErrorInfo.NO_ERROR) {
                            mHandler.showAlert(R.string.error,
                                    ErrorResUtils.getErrorRes(getResources(), res, address));
                        }
                    } catch (RemoteException e) {
                        mHandler.showServiceErrorAlert();
                    }
                }
            };
            Resources r = getResources();
            new AlertDialog.Builder(mContext)
                .setTitle(R.string.confirm)
                .setMessage(r.getString(R.string.confirm_delete_contact, nickname))
                .setPositiveButton(R.string.yes, confirmListener) // default button
                .setNegativeButton(R.string.no, null)
                .setCancelable(false)
                .show();
            clearFocusIfEmpty(c);
        }
    }
    public void blockContact() {
        blockContact(getSelectedContact());
    }
    public void blockContactAtPosition(long packedPosition) {
        blockContact(getContactAtPosition(packedPosition));
    }
    void blockContact(Cursor c) {
        if (c == null) {
            mHandler.showAlert(R.string.error, R.string.select_contact);
        } else {
            String nickname = c.getString(c.getColumnIndexOrThrow(Im.Contacts.NICKNAME));
            final String address = c.getString(c.getColumnIndexOrThrow(Im.Contacts.USERNAME));
            DialogInterface.OnClickListener confirmListener = new DialogInterface.OnClickListener(){
                public void onClick(DialogInterface dialog, int whichButton) {
                    try {
                        IContactListManager manager = mConn.getContactListManager();
                        int res = manager.blockContact(address);
                        if (res != ImErrorInfo.NO_ERROR) {
                            mHandler.showAlert(R.string.error,
                                    ErrorResUtils.getErrorRes(getResources(), res, address));
                        }
                    } catch (RemoteException e) {
                        mHandler.showServiceErrorAlert();
                    }
                }
            };
            Resources r = getResources();
            new AlertDialog.Builder(mContext)
                .setTitle(R.string.confirm)
                .setMessage(r.getString(R.string.confirm_block_contact, nickname))
                .setPositiveButton(R.string.yes, confirmListener) // default button
                .setNegativeButton(R.string.no, null)
                .setCancelable(false)
                .show();
            clearFocusIfEmpty(c);
        }
    }
    public Cursor getContactAtPosition(long packedPosition) {
        int type = ExpandableListView.getPackedPositionType(packedPosition);
        if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
            int groupPosition = ExpandableListView.getPackedPositionGroup(packedPosition);
            int childPosition = ExpandableListView.getPackedPositionChild(packedPosition);
            return (Cursor) mAdapter.getChild(groupPosition, childPosition);
        }
        return null;
    }
    public Cursor getSelectedContact() {
        long pos = mContactsList.getSelectedPosition();
        if (ExpandableListView.getPackedPositionType(pos)
                == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
            return (Cursor)mContactsList.getSelectedItem();
        }
        return null;
    }
    public String getSelectedContactList() {
        long pos = mContactsList.getSelectedPosition();
        int groupPos = ExpandableListView.getPackedPositionGroup(pos);
        if (groupPos == -1) {
            return null;
        }
        Cursor cursor = (Cursor)mAdapter.getGroup(groupPos);
        if (cursor == null) {
            return null;
        }
        return cursor.getString(cursor.getColumnIndexOrThrow(Im.ContactList.NAME));
    }
    private void registerListeners() {
        try{
            IContactListManager listManager = mConn.getContactListManager();
            listManager.registerContactListListener(mContactListListener);
            listManager.registerSubscriptionListener(mSubscriptionListener);
        }catch(RemoteException e) {
            mHandler.showServiceErrorAlert();
        }
    }
    private void unregisterListeners() {
        try{
            IContactListManager listManager = mConn.getContactListManager();
            listManager.unregisterContactListListener(mContactListListener);
            listManager.unregisterSubscriptionListener(mSubscriptionListener);
        }catch(RemoteException e) {
            mHandler.showServiceErrorAlert();
        }
    }
    private final OnChildClickListener mOnChildClickListener = new OnChildClickListener() {
        public boolean onChildClick(ExpandableListView parent, View v, int groupPosition,
                int childPosition, long id) {
            Cursor cursor = (Cursor)parent.getExpandableListAdapter().getChild(
                    groupPosition, childPosition);
            int subscriptionType = cursor.getInt(ContactView.COLUMN_SUBSCRIPTION_TYPE);
            int subscriptionStatus = cursor.getInt(ContactView.COLUMN_SUBSCRIPTION_STATUS);
            if ((subscriptionType == Im.Contacts.SUBSCRIPTION_TYPE_FROM)
                    && (subscriptionStatus == Im.Contacts.SUBSCRIPTION_STATUS_SUBSCRIBE_PENDING)){
                long providerId = cursor.getLong(ContactView.COLUMN_CONTACT_PROVIDER);
                String username = cursor.getString(ContactView.COLUMN_CONTACT_USERNAME);
                Intent intent = new Intent(ImServiceConstants.ACTION_MANAGE_SUBSCRIPTION,
                        ContentUris.withAppendedId(Im.Contacts.CONTENT_URI, id));
                intent.putExtra(ImServiceConstants.EXTRA_INTENT_PROVIDER_ID, providerId);
                intent.putExtra(ImServiceConstants.EXTRA_INTENT_FROM_ADDRESS, username);
                mScreen.startActivity(intent);
            } else {
                startChat(cursor);
            }
            return true;
        }
    };
    static class SavedState extends BaseSavedState {
        int[] mExpandedGroups;
        SavedState(Parcelable superState, int[] expandedGroups) {
            super(superState);
            mExpandedGroups = expandedGroups;
        }
        private SavedState(Parcel in) {
            super(in);
            mExpandedGroups = in.createIntArray();
        }
        @Override
        public void writeToParcel(Parcel out, int flags) {
            super.writeToParcel(out, flags);
            out.writeIntArray(mExpandedGroups);
        }
        public static final Parcelable.Creator<SavedState> CREATOR
                = new Parcelable.Creator<SavedState>() {
            public SavedState createFromParcel(Parcel in) {
                return new SavedState(in);
            }
            public SavedState[] newArray(int size) {
                return new SavedState[size];
            }
        };
    }
    @Override
    public Parcelable onSaveInstanceState() {
        Parcelable superState = super.onSaveInstanceState();
        int[] expandedGroups = mAdapter == null ? null
                : mAdapter.getExpandedGroups();
        return new SavedState(superState, expandedGroups);
    }
    @Override
    public void onRestoreInstanceState(Parcelable state) {
        SavedState ss = (SavedState) state;
        super.onRestoreInstanceState(ss.getSuperState());
        mSavedState = ss;
    }
}

						