android实现蓝牙文件发送的实例代码,支持多种机型

最近项目上需要实现蓝牙传输apk的一个功能，能够搜索周围的蓝牙手机并分享文件。从需求上讲android手机自带的蓝牙传输模块就可以满足需要了，实现也很简单。不过让人头疼的是，虽然说一般的主流机型都配置有蓝牙模块，但是android机型碎片化太严重，不同android版本手机蓝牙功能也不一样。4.0.3以下版本和以上版本使用的蓝牙包是不同的，分别是"com.android.bluetooth"和"com.mediatek.bluetooth"。还有一些厂商对蓝牙模块进行的定制修改，比如华为的c8812。另外，android蓝牙功能是api5以上才有的，所以android的minsdkversion要不低于5才行。

网上很多android调用蓝牙发送模块的例子，完整并且能够兼容多系统的例子很少，这里发一个我用在项目中的例子。

　    /**
     * 通过蓝牙发送文件
     */
    private void sendfile(activity activity) {
        packagemanager localpackagemanager = activity.getpackagemanager();
        intent localintent = null;

        hashmap<string, activityinfo> localhashmap = null;

        try {
            localintent = new intent();
            localintent.setaction(intent.action_send);
            file file = new file(taexternaloverfroyoutils.getdiskcachedir(this,
                    constants.download_dir).getabsolutepath(),
                    textutils.genapkname(worm.getwormid()));
            localintent.putextra(intent.extra_stream, uri.fromfile(file));
            // localintent.putextra(intent.extra_stream,
            // uri.fromfile(new file(localapplicationinfo.sourcedir)));
            localintent.settype("*/*");
            list<resolveinfo> locallist = localpackagemanager.queryintentactivities(
                    localintent, 0);
            localhashmap = new hashmap<string, activityinfo>();
            iterator<resolveinfo> localiterator1 = locallist.iterator();
            while (localiterator1.hasnext()) {
                resolveinfo resolveinfo = (resolveinfo) localiterator1.next();
                activityinfo localactivityinfo2 = resolveinfo.activityinfo;
                string str = localactivityinfo2.applicationinfo.processname;
                if (str.contains("bluetooth"))
                    localhashmap.put(str, localactivityinfo2);
            }
        } catch (exception localexception) {
            toasthelper.showbluetoothsupporterr(activity);
        }
        if (localhashmap.size() == 0)
            toasthelper.showbluetoothsupporterr(activity);
        activityinfo localactivityinfo1 = (activityinfo) localhashmap
                .get("com.android.bluetooth");
        if (localactivityinfo1 == null) {
            localactivityinfo1 = (activityinfo) localhashmap
                    .get("com.mediatek.bluetooth");
        }
        if (localactivityinfo1 == null) {
            iterator<activityinfo> localiterator2 = localhashmap.values().iterator();
            if (localiterator2.hasnext())
                localactivityinfo1 = (activityinfo) localiterator2.next();
        }
        if (localactivityinfo1 != null) {
            localintent.setcomponent(new componentname(
                    localactivityinfo1.packagename, localactivityinfo1.name));
            activity.startactivityforresult(localintent, 4098);
            return;
        }
        toasthelper.showbluetoothsupporterr(activity);
    }

效果：