jni 碰到的問題

1. 用javah產生 *.h 檔時：
   /opt/java/jdk1.7.0_67/bin/javah -classpath /opt/eclipse/android-sdk-linux/platforms/android-17/android.jar:../bin/classes  ManiActivity
   在開發app時需注意 android:minSdkVersion="19" 要符合上述的 level (android-17)
   這裡一個寫17，一個寫19，會有問題
2. 碰到JNIEnv cannot be resolved，擅用 Build Project 可以解決 (專案滑鼠右鍵)
3. 專案 > 滑鼠右鍵 > Properties > C/C++ General > Paths and Symbols > Include 下
   確定有 android:minSdkVersion 和 android:maxSdkVersion 有對應的ndk path
   /opt/android-ndk-r10b/platforms/android-17/arch-arm/usr/include
   /opt/android-ndk-r10b/platforms/android-19/arch-arm/usr/include
4. error: parameter name omitted

   JNIEXPORT jint JNICALL Java_com_uart_NativeUART_sendinfo
     (JNIEnv *env, jobject obj, jint  i, jstring  str);
   

   從 *.h 拷貝到 *.c 時，參數要記得填上 ( c++ 好像可以不用填)
5. Type 'JNICALL' could not be resolved
   專案目錄下 > vim  .project > 把 ccnature 整行拿掉
   
   <natures>
    <nature>com.android.ide.eclipse.adt.AndroidNature</nature>
    <nature>org.eclipse.jdt.core.javanature</nature>
    <nature>org.eclipse.cdt.core.cnature</nature>
    <nature>org.eclipse.cdt.core.ccnature</nature>
    <nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
    <nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
    <nature>edu.umd.cs.findbugs.plugin.eclipse.findbugsNature</nature>
   </natures>

ref:

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