TestJNIActivity.java
package com.permadi.testjni;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class TestJNIActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test_jni);
TextView myTextField = (TextView)findViewById(R.id.myTextField);
myTextField.setText(stringFromJNICPP());
}
public native String stringFromJNICPP();
static {
System.loadLibrary("TestJNI");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.test_jni, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
TestJNI.cpp
#include <string.h>
#include <jni.h>
#include <android/log.h>
extern "C" {
JNIEXPORT jstring JNICALL Java_com_permadi_testjni_TestJNIActivity_stringFromJNICPP(JNIEnv * env, jobject obj);
};
JNIEXPORT jstring JNICALL Java_com_permadi_testjni_TestJNIActivity_stringFromJNICPP(JNIEnv * env, jobject obj)
{
return env->NewStringUTF("Hello World");
}
