[Android Pro] 创建快捷方式，删除快捷方式，查询是否存在快捷方式

private static void createShortcut(Context cxt, String shortcutName, int shortcutIconRes,
            String className, boolean duplicate, boolean laucherCategory) {

        Intent intent = getShortCutIntent(cxt, cxt.getPackageName(), className, shortcutName,
                laucherCategory);
        int iconsize = cxt.getResources().getDimensionPixelSize(Res.dimen.app_icon_size);
        BitmapDrawable icon = (BitmapDrawable) cxt.getResources().getDrawable(shortcutIconRes);
        Bitmap bmp = ImageUtils.scaleTo(icon.getBitmap(), iconsize, iconsize, false);
        intent.putExtra(Intent.EXTRA_SHORTCUT_ICON, bmp);
        intent.putExtra(EXTRA_SHORTCUT_DUPLICATE, duplicate);

        // Now, notify the launcher to create the shortcut
        cxt.sendBroadcast(intent);
    }

private static Intent getShortCutIntent(Context cxt, String pkgName, String className,
            String shortcutName, boolean laucherCategory) {
        // Prepare the intents for shortcut
        Intent shortcutIntent = new Intent(Intent.ACTION_VIEW);
        shortcutIntent.setClassName(pkgName, className);
        shortcutIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        shortcutIntent.putExtra(Constants.EXTRA_FROM_KEY, Constants.EXTRA_FROM_VALUE_SHORTCUT);
        if (laucherCategory) {
            shortcutIntent.addCategory(Intent.CATEGORY_LAUNCHER);
            shortcutIntent.setAction(Intent.ACTION_MAIN);
        }

        Intent intent = new Intent(ACTION_INSTALL_SHORTCUT);
        intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
        intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, shortcutName);
        return intent;
    }

public static void removeShortcut(Context cxt, String shortcutName, String className,
            boolean removeAll) {
        // Prepare the intents for shortcut
        Intent shortcutIntent = new Intent(Intent.ACTION_VIEW);
        shortcutIntent.setClassName(cxt, className);

        Intent intent = new Intent(ACTION_UNINSTALL_SHORTCUT);
        intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
        intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, shortcutName);
        intent.putExtra(EXTRA_SHORTCUT_DUPLICATE, removeAll);

        // Now, notify the launcher to remove the shortcut
        cxt.sendBroadcast(intent);
    }

private boolean hasShortcut()
{
        boolean isInstallShortcut = false;
        final ContentResolver cr = activity.getContentResolver();
        final String AUTHORITY ="com.android.launcher.settings";
        final Uri CONTENT_URI = Uri.parse("content://" +AUTHORITY + "/favorites?notify=true");
        Cursor c = cr.query(CONTENT_URI,new String[] {"title","iconResource" },"title=?",
        new String[] {getString(R.string.app_name).trim()}, null);
        if(c!=null && c.getCount()>0){

//String title = c.getString(c.getColumnIndexOrThrow("title"));
            isInstallShortcut = true ;
        }
        return isInstallShortcut ;
    }