* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <string.h>
#include <jni.h>
#include <stdio.h>
/* This is a trivial JNI example where we use a native method
* to return a new VM String. See the corresponding Java source
* file located at:
*
* apps/samples/hello-jni/project/src/com/example/HelloJni/HelloJni.java
*/
jstring
Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env,
jobject thiz )
{
FILE* file = fopen("/sdcard/hello.txt","w+");
if (file != NULL)
{
fputs("HELLO WORLD!\n", file);
fflush(file);
fclose(file);
}
return (*env)->NewStringUTF(env, "Hello from JNI (with file io)!");
}
Here is the result after running it on my phone (with an SD card):
$ adb -d shell cat /sdcard/hello.txt
HELLO WORLD!