Android java傳遞int類型數組給C，androidint

Android java傳遞int類型數組給C，androidint

接著前面的文章《Android java傳遞int類型資料給C》《Android java傳遞string類型資料給C》，繼續實踐

實現public native int[] arrElementsIncrease(int[] intArray);

項目布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity" >    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="click"        android:text="傳遞int型別參數" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="passString"        android:text="傳遞String型別參數" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="passIntArray"        android:text="傳遞Int類型數組" /></LinearLayout>

實現arrElementsIncrease函數

/* * Class:     com_wuyudong_javapassdata_JNI * Method:    arrElementsIncrease * Signature: ([I)[I */JNIEXPORT jintArray JNICALL Java_com_wuyudong_javapassdata_JNI_arrElementsIncrease(        JNIEnv * env, jobject clazz, jintArray jArray){      jsize len = (*env)->GetArrayLength(env, jArray);     // jboolean iscopy;      int* arrayPointer = (*env)->GetIntArrayElements(env, jArray, NULL);      int i;      for(i = 0; i < len; i++){          *(arrayPointer + i) += 10;      }      return jArray; }

MainActivity.java中添加下面的代碼：

    public void passIntArray(View v) {        int[] array = new int[] { 1, 2, 3, 4, 5 };        int[] newArray = jni.arrElementsIncrease(array);        for (int i : newArray) {            Log.d("test", i + "");        }    }

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