Android-NDK开发之第三个例子--传递整型数组

和以前不同，这次只放代码，不再写步骤，但是，养成一个好的书写步骤是很有必要的，这样你就不容易出错，也容易通过你的步骤来找出错误。特别是你在C/C++代码中出错的时候。

     Android.mk：

    LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE := nativeLOCAL_SRC_FILES := myNative.cinclude $(BUILD_SHARED_LIBRARY) 

  myNative.c

  #include <stdio.h>#include <stdlib.h>#include <string.h>#include<jni.h>jintArray Java_com_geolo_android_AndoidNDKSample_getIntArray(JNIEnv* env , jobject obj){ int i = 1; jintArray array;//定义数组对象 array = (*env)-> NewIntArray(env, 10); for(; i<= 10; i++){ (*env)->SetIntArrayRegion(env, array, i-1, 1, &i); } return array; } 

AndoidNDKSample.java

package com.geolo.android;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;public class AndoidNDKSample extends Activity {/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);TextView textView = (TextView)findViewById(R.id.text);int myArray[] = getIntArray();String myArrayStr = "";for(int my : myArray){myArrayStr += ("my: "+ my + "/n");}textView.setText("getIntArray: " + myArrayStr );}static{System.loadLibrary("native");}public native int[] getIntArray();} 

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextView android:id="@+id/text" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /></LinearLayout>