桌面快捷键和桌面livefolder

 // to create live folder on "home" screen 

if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equalsIgnoreCase(getIntent().getAction())) {
tent().getAction() can be null
    Intent intent = new Intent();
    Uri LIVE_FOLDER_URI = Uri.parse("content://contacts/live_folders/people");
    intent.setData(LIVE_FOLDER_URI);
    intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_BASE_INTENT, new Intent(
            Intent.ACTION_VIEW, Contacts.People.CONTENT_URI));
    intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_NAME, "allnamefolder");
    intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_ICON, Intent.ShortcutIconResource
            .fromContext(this, R.drawable.krec));
    intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_DISPLAY_MODE,
            LiveFolders.DISPLAY_MODE_GRID);
    this.setResult(RESULT_OK, intent);

} else {
    this.setResult(Activity.RESULT_CANCELED);
}

if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equalsIgnoreCase(getIntent().getAction())) {
tent().getAction() can be null
    Intent intent = new Intent();
    Uri LIVE_FOLDER_URI = Uri.parse("content://contacts/live_folders/people");
    intent.setData(LIVE_FOLDER_URI);
    intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_BASE_INTENT, new Intent(
            Intent.ACTION_VIEW, Contacts.People.CONTENT_URI));
    intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_NAME, "allnamefolder");
    intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_ICON, Intent.ShortcutIconResource
            .fromContext(this, R.drawable.krec));
    intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_DISPLAY_MODE,
            LiveFolders.DISPLAY_MODE_GRID);
    this.setResult(RESULT_OK, intent);

} else {
    this.setResult(Activity.RESULT_CANCELED);
}

// to create shortcut on "home" screen 
// toPrint is a very simple apk. 

Intent toPrint = new Intent(this, anSimplePrint.class);

Intent addShortcut = new Intent("com.android.launcher.action.INSTALL_SHORTCUT");
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "SP");
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, toPrint);
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource
        .fromContext(this, R.drawable.ksig));

Intent toPrint = new Intent(this, anSimplePrint.class);

Intent addShortcut = new Intent("com.android.launcher.action.INSTALL_SHORTCUT");
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "SP");
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, toPrint);
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource
        .fromContext(this, R.drawable.ksig));

//remember to fix manifest file 
// add . 

        <intent-filter>
            <action android:name="android.intent.action.CREATE_SHORTCUT" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.intent.action.CREATE_LIVE_FOLDER" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>


<uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT"></uses-permission>

        <intent-filter>
            <action android:name="android.intent.action.CREATE_SHORTCUT" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <intent-filter>
            <action android:name="android.intent.action.CREATE_LIVE_FOLDER" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>


<uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT"></uses-permission>

/////////////////////////////////////////////////////////////////////////////// 
// 系统的contacts 在桌面livefolder添加快捷方式的代码如下。想要在livefolder中添加// 其他app的快捷方式，也可以依法炮制 

public class ContactsLiveFolders {
    public static class StarredContacts extends Activity {
        public static final Uri CONTENT_URI =
                Uri.parse("content://contacts/live_folders/favorites");

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

            final Intent intent = getIntent();
            final String action = intent.getAction();

            if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
                setResult(RESULT_OK, createLiveFolder(this, CONTENT_URI,
                        getString(R.string.liveFolder_favorites_label),
                        R.drawable.ic_launcher_folder_live_contacts_starred));
            } else {
                setResult(RESULT_CANCELED);
            }

            finish();
        }
    }

    public static class PhoneContacts extends Activity {
        public static final Uri CONTENT_URI =
                Uri.parse("content://contacts/live_folders/people_with_phones");

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

            final Intent intent = getIntent();
            final String action = intent.getAction();

            if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
                setResult(RESULT_OK, createLiveFolder(this, CONTENT_URI,
                        getString(R.string.liveFolder_phones_label),
                        R.drawable.ic_launcher_folder_live_contacts_phone));
            } else {
                setResult(RESULT_CANCELED);
            }

            finish();
        }
    }

    public static class AllContacts extends Activity {
        public static final Uri CONTENT_URI =
                Uri.parse("content://contacts/live_folders/people");

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

            final Intent intent = getIntent();
            final String action = intent.getAction();

            if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
                setResult(RESULT_OK, createLiveFolder(this, CONTENT_URI,
                        getString(R.string.liveFolder_all_label),
                        R.drawable.ic_launcher_folder_live_contacts));
            } else {
                setResult(RESULT_CANCELED);
            }

            finish();
        }
    }

    private static Intent createLiveFolder(Context context, Uri uri, String name,
            int icon) {

        final Intent intent = new Intent();

        intent.setData(uri);
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_BASE_INTENT,
                new Intent(Intent.ACTION_VIEW, Contacts.CONTENT_URI));
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_NAME, name);
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_ICON,
                Intent.ShortcutIconResource.fromContext(context, icon));
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_DISPLAY_MODE, LiveFolders.DISPLAY_MODE_LIST);

        return intent;
    }
}

public class ContactsLiveFolders {
    public static class StarredContacts extends Activity {
        public static final Uri CONTENT_URI =
                Uri.parse("content://contacts/live_folders/favorites");

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

            final Intent intent = getIntent();
            final String action = intent.getAction();

            if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
                setResult(RESULT_OK, createLiveFolder(this, CONTENT_URI,
                        getString(R.string.liveFolder_favorites_label),
                        R.drawable.ic_launcher_folder_live_contacts_starred));
            } else {
                setResult(RESULT_CANCELED);
            }

            finish();
        }
    }

    public static class PhoneContacts extends Activity {
        public static final Uri CONTENT_URI =
                Uri.parse("content://contacts/live_folders/people_with_phones");

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

            final Intent intent = getIntent();
            final String action = intent.getAction();

            if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
                setResult(RESULT_OK, createLiveFolder(this, CONTENT_URI,
                        getString(R.string.liveFolder_phones_label),
                        R.drawable.ic_launcher_folder_live_contacts_phone));
            } else {
                setResult(RESULT_CANCELED);
            }

            finish();
        }
    }

    public static class AllContacts extends Activity {
        public static final Uri CONTENT_URI =
                Uri.parse("content://contacts/live_folders/people");

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

            final Intent intent = getIntent();
            final String action = intent.getAction();

            if (LiveFolders.ACTION_CREATE_LIVE_FOLDER.equals(action)) {
                setResult(RESULT_OK, createLiveFolder(this, CONTENT_URI,
                        getString(R.string.liveFolder_all_label),
                        R.drawable.ic_launcher_folder_live_contacts));
            } else {
                setResult(RESULT_CANCELED);
            }

            finish();
        }
    }

    private static Intent createLiveFolder(Context context, Uri uri, String name,
            int icon) {

        final Intent intent = new Intent();

        intent.setData(uri);
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_BASE_INTENT,
                new Intent(Intent.ACTION_VIEW, Contacts.CONTENT_URI));
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_NAME, name);
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_ICON,
                Intent.ShortcutIconResource.fromContext(context, icon));
        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_DISPLAY_MODE, LiveFolders.DISPLAY_MODE_LIST);

        return intent;
    }
}

//////////////////// 
// 

        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_BASE_INTENT,
                new Intent(Intent.ACTION_VIEW, Contacts.CONTENT_URI));
这个在用的时候。 如果你用的uri读出来没有一个叫name的表项，
那这个ACTION_VIEW会失败，所以需要有个叫name的，作为livefolder显示出来的东西。

比如系统的contactsprovider 里面  大概3790行
            case LIVE_FOLDERS_CONTACTS_GROUP_NAME:
                qb.setTables(mDbHelper.getContactView());
                qb.setProjectionMap(sLiveFoldersProjectionMap);
                qb.appendWhere(CONTACTS_IN_GROUP_SELECT);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                break;

这里qb.setProjectionMap(sLiveFoldersProjectionMap); 就是把有一个项作为name显示
//contactsProvider2.java line 854
       sLiveFoldersProjectionMap = new HashMap<String, String>();
        sLiveFoldersProjectionMap.put(LiveFolders._ID,
                Contacts._ID + " AS " + LiveFolders._ID);
        sLiveFoldersProjectionMap.put(LiveFolders.NAME,
                Contacts.DISPLAY_NAME + " AS " + LiveFolders.NAME);

        intent.putExtra(LiveFolders.EXTRA_LIVE_FOLDER_BASE_INTENT,
                new Intent(Intent.ACTION_VIEW, Contacts.CONTENT_URI));
这个在用的时候。 如果你用的uri读出来没有一个叫name的表项，
那这个ACTION_VIEW会失败，所以需要有个叫name的，作为livefolder显示出来的东西。

比如系统的contactsprovider 里面  大概3790行
            case LIVE_FOLDERS_CONTACTS_GROUP_NAME:
                qb.setTables(mDbHelper.getContactView());
                qb.setProjectionMap(sLiveFoldersProjectionMap);
                qb.appendWhere(CONTACTS_IN_GROUP_SELECT);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                break;

这里qb.setProjectionMap(sLiveFoldersProjectionMap); 就是把有一个项作为name显示
//contactsProvider2.java line 854
       sLiveFoldersProjectionMap = new HashMap<String, String>();
        sLiveFoldersProjectionMap.put(LiveFolders._ID,
                Contacts._ID + " AS " + LiveFolders._ID);
        sLiveFoldersProjectionMap.put(LiveFolders.NAME,
                Contacts.DISPLAY_NAME + " AS " + LiveFolders.NAME);

自己实现一contentprovider来做这个事情的时候也需要实现一个 name作为显示， 
即在cursor query的时候加入比如select xxx as name, 在projection里加。 
说不清了。。。 
//一般还是不要自己造contentprovider了。。 系统的差不多够用 
//问题是怎么在系统里找到所有的uri？ 嘿嘿。我不会－ － 

这里转个大大的博克 
http://kuikui.iteye.com/blog/318627 
刚起步的时候经常困扰我们的是一些本来容易解决的问题，往往我们会花掉很大的力气去找解决的办法，最后才知道原来这么简单，这就是英文世界造成的。 

Intent在 Android应用开发中，占有很大的分量，关于Intent在Android中的作用在网络上已经有很多资料了，这里不再累赘，本人喜欢直来直去。在网上看到很多关于Intent的资料，说那么多，你也许还是一头雾水，到底如何使用Intent呢？这里总结一些重用的Intent使用，仅供参考。 

下面直接给我学习的实例片段。 



1，掉web浏览器 

Uri myBlogUri = Uri.parse("http://kuikui.iteye.com"); 

returnIt = new Intent(Intent.ACTION_VIEW, myBlogUri); 

2，地图 

Uri mapUri = Uri.parse("geo:38.899533,-77.036476"); 

returnIt = new Intent(Intent.ACTION_VIEW, mapUri); 

3，调拨打电话界面 

Uri telUri = Uri.parse("tel:100861"); 

returnIt = new Intent(Intent.ACTION_DIAL, telUri); 

4，直接拨打电话 

Uri callUri = Uri.parse("tel:100861"); 

returnIt = new Intent(Intent.ACTION_CALL, callUri); 

5，卸载 

Uri uninstallUri = Uri.fromParts("package", "xxx", null); 

returnIt = new Intent(Intent.ACTION_DELETE, uninstallUri); 

6，安装 

Uri installUri = Uri.fromParts("package", "xxx", null); 

returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri); 

7，播放 

Uri playUri = Uri.parse("file:///sdcard/download/everything.mp3"); 

returnIt = new Intent(Intent.ACTION_VIEW, playUri); 

8，掉用发邮件 

Uri emailUri = Uri.parse("mailto:shenrenkui@gmail.com"); 

returnIt = new Intent(Intent.ACTION_SENDTO, emailUri); 

9，发邮件 

returnIt = new Intent(Intent.ACTION_SEND); 

String[] tos = { "shenrenkui@gmail.com" }; 

String[] ccs = { "shenrenkui@gmail.com" }; 

returnIt.putExtra(Intent.EXTRA_EMAIL, tos); 

returnIt.putExtra(Intent.EXTRA_CC, ccs); 

returnIt.putExtra(Intent.EXTRA_TEXT, "body"); 

returnIt.putExtra(Intent.EXTRA_SUBJECT, "subject"); 

returnIt.setType("message/rfc882"); 

Intent.createChooser(returnIt, "Choose Email Client"); 

10，发短信 

Uri smsUri = Uri.parse("tel:100861"); 

returnIt = new Intent(Intent.ACTION_VIEW, smsUri); 

returnIt.putExtra("sms_body", "shenrenkui"); 

returnIt.setType("vnd.android-dir/mms-sms"); 

11，直接发邮件 

Uri smsToUri = Uri.parse("smsto://100861"); 

returnIt = new Intent(Intent.ACTION_SENDTO, smsToUri); 

returnIt.putExtra("sms_body", "shenrenkui"); 

12，发彩信 

Uri mmsUri = Uri.parse("content://media/external/images/media/23"); 

returnIt = new Intent(Intent.ACTION_SEND); 

returnIt.putExtra("sms_body", "shenrenkui"); 

returnIt.putExtra(Intent.EXTRA_STREAM, mmsUri); 

returnIt.setType("image/png"); 

用获取到的Intent直接调用startActivity(returnIt)就ok了