如何在android4.4版本上支持蓝牙发送APK文件

将application/vnd.android.package-archive类型加到packages/apps/Bluetooth/AndroidManifest.xml文件中。
如： 
1. <activity android:name=".opp.BluetoothOppLauncherActivity"
            android:process="@string/process"
            android:theme="@android:style/Theme.Translucent.NoTitleBar"
            android:label="@string/bt_share_picker_label"
            android:enabled="@bool/profile_supported_opp">
            <intent-filter>
                <action android:name="android.intent.action.SEND" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="image/*" />
...
+++          <data android:mimeType="application/vnd.android.package-archive" />

2. <intent-filter>
                <action android:name="android.intent.action.SEND_MULTIPLE" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="image/*" />
...
+++          <data android:mimeType="application/vnd.android.package-archive" />