From 4e4c07169707c30c0588ecb2b4395dc3f7f453e4 Mon Sep 17 00:00:00 2001
From: Greg <gmp@wow.st>
Date: Wed, 30 Oct 2019 12:09:16 -0400
Subject: [PATCH] Add gioui.org/permission/bluetooth and EnableBluetooth()
 function.

---
 ble_android.go |  1 +
 jni_android.go | 47 ++++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 41 insertions(+), 7 deletions(-)

diff --git a/ble_android.go b/ble_android.go
index 349bbd6..1764404 100644
--- a/ble_android.go
+++ b/ble_android.go
@@ -3,6 +3,7 @@ package ble
 import (
 	"log"
 	"gioui.org/app"
+	_ "gioui.org/permission/bluetooth"
 )
 
 /*
diff --git a/jni_android.go b/jni_android.go
index 108fa94..4d1b362 100644
--- a/jni_android.go
+++ b/jni_android.go
@@ -27,6 +27,42 @@ SetLoader(JNIEnv* env, jobject context) {
 	gFindClassMethod = (*env)->GetMethodID(env, lclass, "findClass", "(Ljava/lang/String;)Ljava/lang/Class;");
 }
 
+jclass
+FindClass(JNIEnv* env, char* name) {
+	jstring strClassName = (*env)->NewStringUTF(env, name);
+	return (*env)->CallObjectMethod(env, gClassLoader, gFindClassMethod, strClassName);
+}
+
+void
+EnableBluetooth(JNIEnv* env, jobject ctx, jobject ad) {
+	__android_log_write(ANDROID_LOG_DEBUG, "gio", "Finding BleUtil");
+	jclass cls = FindClass(env, "st/wow/git/ble/BleUtil");
+	if (cls == NULL) {
+		__android_log_write(ANDROID_LOG_DEBUG, "gio", "not found");
+		return;
+	}
+	__android_log_write(ANDROID_LOG_DEBUG, "gio", "getting <init>");
+	jmethodID mid = (*env)->GetMethodID(env, cls, "<init>", "()V");
+	if (mid == NULL) {
+		__android_log_write(ANDROID_LOG_DEBUG, "gio", "not found");
+		return;
+	}
+	__android_log_write(ANDROID_LOG_DEBUG, "gio", "calling NewObject");
+	jobject bleutil = (*env)->NewObject(env, cls, mid);
+	if (bleutil == NULL) {
+		__android_log_write(ANDROID_LOG_DEBUG, "gio", "failed");
+		return;
+	}
+	__android_log_write(ANDROID_LOG_DEBUG, "gio", "Getting Enable()");
+	mid = (*env)->GetMethodID(env, cls, "Enable", "(Landroid/content/Context;)V");
+	if (mid == NULL) {
+		__android_log_write(ANDROID_LOG_DEBUG, "gio", "failed");
+		return;
+	}
+	__android_log_write(ANDROID_LOG_DEBUG, "gio", "Calling Enable()");
+	(*env)->CallVoidMethod(env, bleutil, mid, ctx);
+}
+
 jobject
 GetBluetoothAdapter(JNIEnv* env, jobject ctx) {
 	jclass cls = (*env)->GetObjectClass(env, ctx);
@@ -70,7 +106,10 @@ GetBluetoothAdapter(JNIEnv* env, jobject ctx) {
 	} else {
 		__android_log_write(ANDROID_LOG_DEBUG, "gio", "GetBluetoothAdapter(): Found");
 	}
+
 	ad = (*env)->NewGlobalRef(env, ad);
+
+	EnableBluetooth(env, ctx, ad);
 	return ad;
 }
 
@@ -89,12 +128,6 @@ GetObjectStaticStringField(JNIEnv* env, jobject obj, char* fld) {
 	return (jstring)(*env)->GetStaticObjectField(env, cls, id);
 }
 
-jclass
-FindClass(JNIEnv* env, char* name) {
-	jstring strClassName = (*env)->NewStringUTF(env, name);
-	return (*env)->CallObjectMethod(env, gClassLoader, gFindClassMethod, strClassName);
-}
-
 JNIEXPORT jobject
 CreateObject(JNIEnv* env, jclass cls) {
 	jmethodID init = (*env)->GetMethodID(env, cls, "<init>", "()V");
@@ -178,7 +211,7 @@ func JniCallVoidMethod(env *C.JNIEnv, obj C.jobject, methodID C.jmethodID) {
 }
 
 func JniCallBooleanMethod(env *C.JNIEnv, obj C.jobject, methodID C.jmethodID) bool {
-	return C.CallBooleanMethod(env, obj, methodID) == 0
+	return C.CallBooleanMethod(env, obj, methodID) == C.JNI_TRUE
 }
 
 func JniCallIntMethod(env *C.JNIEnv, obj C.jobject, methodID C.jmethodID) int {