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  • File Operations in Android NDK(转)

     *      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
    !
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  • 原文地址:https://www.cnblogs.com/gaozehua/p/2164075.html
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