Implement Clip on Android.

impl_android.go

@@ -67,7 +67,7 @@ func connect() {
 
 //Clip copies a string to the clipboard
 func Clip(x string) {
-	fmt.Println("Clipboard not implemented for this platform")
+	pgp.Clip(x)
 }
 
 func (s *Store) nativeDecrypt(name string) (string, error) {

jni_android.c

@@ -101,6 +101,17 @@ Encrypt(JNIEnv* env, jobject p, char* cid, int idlen, char* cdata, int datalen,
 	(*env)->CallVoidMethod(env, p, mid, id, data, chint);
 }
 
+void
+Clip(JNIEnv* env, jobject p, char* cdata, int datalen) {
+	jbyteArray data = (*env)->NewByteArray(env, datalen);
+	if (datalen > 0 {
+		(*env)->SetByteArrayRegion(env, data, 0, datalen, cdata);
+	}
+	jclass cls = (*env)->GetObjectClass(p);
+	jmethodID mid = (*env)->GetMethodID(env, cls, "Clip", "([B)V);
+	(*env)->CallVoidMethod(env, p, mid, data);
+}
+
 void CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID) {
 	(*env)->CallVoidMethod(env, obj, methodID);
 }

jni_android.go

@@ -149,6 +149,14 @@ func (p PGP) Encrypt(id, data string) (string, error) {
 	}
 }
 
+func (p PGP) Clip(data string) {
+	cdata := C.CString(data)
+	defer C.free(unsafe.Pointer(cdata))
+	RunInJVM(func(env *JNIEnv) {
+		C.Clip(env, (C.jobject)(p), (*C.char)(unsafe.Pointer(cdata)), (C.int)(len(data)))
+	})
+}
+
 func RunInJVM(f func(env *C.JNIEnv)) {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()

jni_android.h

@@ -7,6 +7,7 @@ void InitPgpConnect(JNIEnv* env);
 void GetId(JNIEnv* env, jobject p, int chint);
 void Decrypt(JNIEnv* env, jobject p, char* cdata, int datalen, int chint);
 void Encrypt(JNIEnv* env, jobject p, char* cid, int idlen, char* cdata, int datalen, int chint);
+void Clip(JNIEnv* env, jobject p, char* cdata, int datalen);
 void stringResult(JNIEnv* env, jclass cls, jint requestCode, jobject response);
 void CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID);
 void CallVoidMethod1(JNIEnv *env, jobject obj, jmethodID methodID, jobject arg);