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。

复制代码 代码如下:
　 /**
* 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：