android.os.FileUriExposedException: file:///storage/emulated/0/myxmpp/154094

在项目的MainActivity的开始添加下面这段代码

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
    StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
    StrictMode.setVmPolicy( builder.build() );
}