如何在Android下使用JNI
\u5982\u4f55\u5728Android\u4e0b\u4f7f\u7528JNI\u3000\u3000\u6211\u4eec\u77e5\u9053\uff0cAndroid\u7cfb\u7edf\u7684\u5e95\u5c42\u5e93\u7531c/c++\u7f16\u5199\uff0c\u4e0a\u5c42Android\u5e94\u7528\u7a0b\u5e8f\u901a\u8fc7Java\u865a\u62df\u673a\u8c03\u7528\u5e95\u5c42\u63a5\u53e3\uff0c\u8854\u63a5\u5e95\u5c42c/c++\u5e93\u4e0eJava\u5e94\u7528\u7a0b\u5e8f\u95f4\u7684\u63a5\u53e3\u6b63\u662fJNI\uff08JavaNative Interface)\u3002\u672c\u6587\u63cf\u8ff0\u4e86\u5982\u4f55\u5728ubuntu\u4e0b\u914d\u7f6eAndroidJNI\u7684\u5f00\u53d1\u73af\u5883\uff0c\u4ee5\u53ca\u5982\u4f55\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684c\u51fd\u6570\u5e93\u548cJNI\u63a5\u53e3\uff0c\u5e76\u901a\u8fc7\u7f16\u5199Java\u7a0b\u5e8f\u8c03\u7528\u8fd9\u4e9b\u63a5\u53e3\uff0c\u6700\u7ec8\u8fd0\u884c\u5728\u6a21\u62df\u5668\u4e0a\u7684\u8fc7\u7a0b\u3002
\u3000\u30002.\u73af\u5883\u914d\u7f6e
\u3000\u30002.1.\u5b89\u88c5jdk1.6
\u3000\u3000\uff081\uff09\u4ecejdk\u5b98\u65b9\u7f51\u7ad9\u4e0b\u8f7djdk-6u29-linux-i586.bin\u6587\u4ef6\u3002
\u3000\u3000\uff082\uff09\u6267\u884cjdk\u5b89\u88c5\u6587\u4ef6
\u3000\u3000[html] view plaincopyprint?
\u3000\u300001.$chmod a+x jdk-6u29-linux-i586.bin
\u3000\u300002.$jdk-6u29-linux-i586.bin
\u3000\u3000$chmod a+x jdk-6u29-linux-i586.bin
\u3000\u3000$jdk-6u29-linux-i586.bin
\u3000\u3000(3)\u914d\u7f6ejdk\u73af\u5883\u53d8\u91cf
\u3000\u3000[html] view plaincopyprint?
\u3000\u300001.$sudo vim /etc/profile
\u3000\u300002.#JAVAEVIRENMENT
\u3000\u300003.exportJAVA_HOME=/usr/lib/java/jdk1.6.0_29
\u3000\u300004.exportJRE_HOME=$JAVA_HOME/jre
\u3000\u300005.exportCLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
\u3000\u300006.exportPATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
\u3000\u3000$sudo vim /etc/profile
\u3000\u3000#JAVAEVIRENMENT
\u3000\u3000exportJAVA_HOME=/usr/lib/java/jdk1.6.0_29
\u3000\u3000exportJRE_HOME=$JAVA_HOME/jre
\u3000\u3000exportCLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
\u3000\u3000exportPATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
\u3000\u3000\u4fdd\u5b58\u540e\u9000\u51fa\u7f16\u8f91\uff0c\u5e76\u91cd\u542f\u7cfb\u7edf\u3002
\u3000\u3000\uff084\uff09\u9a8c\u8bc1\u5b89\u88c5
\u3000\u3000[html] view plaincopyprint?
\u3000\u300001.$java -version
\u3000\u300002.javaversion "1.6.0_29"
\u3000\u300003.Java(TM)SE Runtime Environment (build 1.6.0_29-b11)
\u3000\u300004.JavaHotSpot(TM) Server VM (build 20.4-b02, mixed mode)
\u3000\u300005.$javah
\u3000\u300006.\u7528\u6cd5\uff1ajavah[\u9009\u9879]
\u3000\u300007.\u5176\u4e2d[\u9009\u9879]\u5305\u62ec\uff1a
\u3000\u300008.-help\u8f93\u51fa\u6b64\u5e2e\u52a9\u6d88\u606f\u5e76\u9000\u51fa
\u3000\u300009.-classpath\u7528\u4e8e\u88c5\u5165\u7c7b\u7684\u8def\u5f84
\u3000\u300010.-bootclasspath\u7528\u4e8e\u88c5\u5165\u5f15\u5bfc\u7c7b\u7684\u8def\u5f84
\u3000\u300011.-d\u8f93\u51fa\u76ee\u5f55
\u3000\u300012.-o\u8f93\u51fa\u6587\u4ef6\uff08\u53ea\u80fd\u4f7f\u7528-d\u6216-o\u4e2d\u7684\u4e00\u4e2a\uff09
\u3000\u300013.-jni\u751f\u6210JNI\u6837\u5f0f\u7684\u5934\u6587\u4ef6\uff08\u9ed8\u8ba4\uff09
\u3000\u300014.-version\u8f93\u51fa\u7248\u672c\u4fe1\u606f
\u3000\u300015.-verbose\u542f\u7528\u8be6\u7ec6\u8f93\u51fa
\u3000\u300016.-force\u59cb\u7ec8\u5199\u5165\u8f93\u51fa\u6587\u4ef6
\u3000\u300017.\u4f7f\u7528\u5168\u9650\u5b9a\u540d\u79f0\u6307\u5b9a\uff08\u4f8b
\u3000\u300018.\u5982\uff0cjava.lang.Object\uff09\u3002
\u3000\u3000$java -version
\u3000\u3000javaversion "1.6.0_29"
\u3000\u3000Java(TM)SE Runtime Environment (build 1.6.0_29-b11)
\u3000\u3000JavaHotSpot(TM) Server VM (build 20.4-b02, mixed mode)
\u3000\u3000$javah
\u3000\u3000\u7528\u6cd5\uff1ajavah[\u9009\u9879]
\u3000\u3000\u5176\u4e2d[\u9009\u9879]\u5305\u62ec\uff1a
\u3000\u3000-help\u8f93\u51fa\u6b64\u5e2e\u52a9\u6d88\u606f\u5e76\u9000\u51fa
\u3000\u3000-classpath\u7528\u4e8e\u88c5\u5165\u7c7b\u7684\u8def\u5f84
\u3000\u3000-bootclasspath\u7528\u4e8e\u88c5\u5165\u5f15\u5bfc\u7c7b\u7684\u8def\u5f84
\u3000\u3000-d\u8f93\u51fa\u76ee\u5f55
\u3000\u3000-o\u8f93\u51fa\u6587\u4ef6\uff08\u53ea\u80fd\u4f7f\u7528-d\u6216-o\u4e2d\u7684\u4e00\u4e2a\uff09
\u3000\u3000-jni\u751f\u6210JNI\u6837\u5f0f\u7684\u5934\u6587\u4ef6\uff08\u9ed8\u8ba4\uff09
\u3000\u3000-version\u8f93\u51fa\u7248\u672c\u4fe1\u606f
\u3000\u3000-verbose\u542f\u7528\u8be6\u7ec6\u8f93\u51fa
\u3000\u3000-force\u59cb\u7ec8\u5199\u5165\u8f93\u51fa\u6587\u4ef6
\u3000\u3000\u4f7f\u7528\u5168\u9650\u5b9a\u540d\u79f0\u6307\u5b9a\uff08\u4f8b
\u3000\u3000\u5982\uff0cjava.lang.Object\uff09\u30022.2.\u5b89\u88c5android\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u73af\u5883
\u3000\u3000ubuntu\u4e0b\u5b89\u88c5android\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u73af\u5883\u4e0ewindows\u7c7b\u4f3c\uff0c\u4f9d\u6b21\u5b89\u88c5\u597d\u4ee5\u4e0b\u8f6f\u4ef6\u5373\u53ef\uff1a
\u3000\u3000\uff081\uff09Eclipse
\u3000\u3000\uff082\uff09ADT
\u3000\u3000\uff083\uff09AndroidSDK
\u3000\u3000\u4e0ewindows\u4e0b\u5b89\u88c5\u552f\u4e00\u4e0d\u540c\u7684\u4e00\u70b9\u662f\uff0c\u4e0b\u8f7d\u8fd9\u4e9b\u8f6f\u4ef6\u7684\u65f6\u5019\u8981\u4e0b\u8f7dLinux\u7248\u672c\u7684\u5b89\u88c5\u5305\u3002
\u3000\u3000\u5b89\u88c5\u597d\u4ee5\u4e0aandroid\u5e94\u7528\u7a0b\u5e8f\u7684\u5f00\u53d1\u73af\u5883\u540e\uff0c\u8fd8\u53ef\u4ee5\u9009\u62e9\u662f\u5426\u9700\u8981\u914d\u7f6eemulator\u548cadb\u5de5\u5177\u7684\u73af\u5883\u53d8\u91cf\uff0c\u4ee5\u65b9\u4fbf\u5728\u8fdb\u884cJNI\u5f00\u53d1\u7684\u65f6\u5019\u4f7f\u7528\u3002\u914d\u7f6e\u6b65\u9aa4\u5982\u4e0b\uff1a
\u3000\u3000\u628aemulator\u6240\u5728\u76ee\u5f55android-sdk-linux/tools\u4ee5\u53caadb\u6240\u5728\u76ee\u5f55android-sdk-linux/platform-tools\u6dfb\u52a0\u5230\u73af\u5883\u53d8\u91cf\u4e2d\uff0candroid-sdk-linux\u6307androidsdk\u5b89\u88c5\u5305android-sdk_rxx-linux\u7684\u89e3\u538b\u76ee\u5f55\u3002
\u3000\u3000[plain] view plaincopyprint?
\u3000\u300001.$sudo vim /etc/profile
\u3000\u300002.exportPATH=~/software/android/android-sdk-linux/tools:$PATH
\u3000\u300003. exportPATH=~/software/android/android-sdk-linux/platform-tools:$PATH
\u3000\u3000$sudo vim /etc/profile
\u3000\u3000exportPATH=~/software/android/android-sdk-linux/tools:$PATH
\u3000\u3000exportPATH=~/software/android/android-sdk-linux/platform-tools:$PATH
\u3000\u3000\u7f16\u8f91\u5b8c\u6bd5\u540e\u9000\u51fa\uff0c\u5e76\u91cd\u542f\u751f\u6548\u3002
\u3000\u30002.3.\u5b89\u88c5NDK
\u3000\u3000NDK\u662f\u7531android\u63d0\u4f9b\u7684\u7f16\u8bd1android\u672c\u5730\u4ee3\u7801\u7684\u4e00\u4e2a\u5de5\u5177\u3002
\u3000\u3000\uff081\uff09\u4eceandroidndk\u5b98\u7f51\u4e0b\u8f7dndk\uff0c\u76ee\u524d\u6700\u65b0\u7248\u672c\u4e3aandroid-ndk-r6b-linux-x86.tar.bz2.
\u3000\u3000\uff082\uff09\u89e3\u538bndk\u5230\u5de5\u4f5c\u76ee\u5f55\uff1a
\u3000\u3000[plain] view plaincopyprint?
\u3000\u300001.$tar -xvf android-ndk-r6b-linux-x86.tar.bz2
\u3000\u300002.$sudo mv android-ndk-r6b /usr/local/ndk
\u3000\u3000$tar -xvf android-ndk-r6b-linux-x86.tar.bz2
\u3000\u3000$sudo mv android-ndk-r6b /usr/local/ndk
\u3000\u3000\uff083\uff09\u8bbe\u7f6endk\u73af\u5883\u53d8\u91cf
\u3000\u3000[plain] view plaincopyprint?
\u3000\u300001.$sudo vim /etc/profile
\u3000\u300002.exportPATH=/usr/local/ndk:$PATH
\u3000\u3000$sudo vim /etc/profile
\u3000\u3000exportPATH=/usr/local/ndk:$PATH
\u3000\u3000\u7f16\u8f91\u5b8c\u6bd5\u540e\u4fdd\u5b58\u9000\u51fa\uff0c\u5e76\u91cd\u542f\u751f\u6548
\u3000\u3000\uff084\uff09\u9a8c\u8bc1\u5b89\u88c5
\u3000\u3000[plain] view plaincopyprint?
\u3000\u300001.$ cd/usr/local/ndk/samples/hello-jni/
\u3000\u300002.$ ndk-build
\u3000\u300003.Gdbserver : [arm-linux-androideabi-4.4.3] libs/armeabi/gdbserver
\u3000\u300004.Gdbsetup : libs/armeabi/gdb.setup
\u3000\u300005.Install : libhello-jni.so => libs/armeabi/libhello-jni.so
\u3000\u3000$ cd/usr/local/ndk/samples/hello-jni/
\u3000\u3000$ ndk-build
\u3000\u3000Gdbserver : [arm-linux-androideabi-4.4.3] libs/armeabi/gdbserver
\u3000\u3000Gdbsetup : libs/armeabi/gdb.setup
\u3000\u3000Install : libhello-jni.so => libs/armeabi/libhello-jni.so
\u3000\u30003.JNI\u5b9e\u73b0
\u3000\u3000\u6211\u4eec\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u7b26\u5408JNI\u63a5\u53e3\u89c4\u8303\u7684c/c++\u63a5\u53e3\uff0c\u8fd9\u4e2a\u63a5\u53e3\u4e0d\u7528\u592a\u590d\u6742\uff0c\u4f8b\u5982\u8f93\u51fa\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\u63a5\u4e0b\u6765\uff0c\u5219\u9700\u8981\u628ac/c++\u63a5\u53e3\u7684\u4ee3\u7801\u6587\u4ef6\u7f16\u8bd1\u6210\u5171\u4eab\u5e93\uff08\u52a8\u6001\u5e93\uff09.so\u6587\u4ef6\uff0c\u5e76\u653e\u5230\u6a21\u62df\u5668\u7684\u76f8\u5173\u76ee\u5f55\u4e0b\u3002\u6700\u540e\uff0c\u542f\u52a8Java\u5e94\u7528\u7a0b\u5e8f\uff0c\u5c31\u53ef\u4ee5\u770b\u5230\u6700\u7ec8\u6548\u679c\u4e86\u3002
\u3000\u30003.1.\u7f16\u5199Java\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801
\u3000\u3000\uff081\uff09\u542f\u52a8Eclipse\uff0c\u65b0\u5efaandroid\u5de5\u7a0b
\u3000\u3000Project\uff1aJNITest
\u3000\u3000Package\uff1aorg.tonny.jni
\u3000\u3000Activity\uff1aJNITest
\u3000\u3000\uff082\uff09\u7f16\u8f91\u8d44\u6e90\u6587\u4ef6
\u3000\u3000\u7f16\u8f91res/values/strings.xml\u6587\u4ef6\u5982\u4e0b\uff1a
\u3000\u3000[html] view plaincopyprint?
\u3000\u300001.
\u3000\u300002.
\u3000\u300003.HelloWorld, JNITestActivity!
\u3000\u300004.JNITest
\u3000\u300005.Show
\u3000\u300006.
\u3000\u3000
\u3000\u3000
\u3000\u3000HelloWorld, JNITestActivity!
\u3000\u3000JNITest
\u3000\u3000Show
\u3000\u3000
\u3000\u3000\u7f16\u8f91res/layout/main.xml\u6587\u4ef6\u5982\u4e0b\uff1a
\u3000\u3000[html] view plaincopyprint?
\u3000\u300001.
\u3000\u300002.<LinearLayoutxmlns:androidLinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
\u3000\u300003.android:layout_width="fill_parent"
\u3000\u300004.android:layout_height="fill_parent"
\u3000\u300005.android:orientation="vertical">
\u3000\u300006.<TextView
\u3000\u300007.android:layout_width="fill_parent"
\u3000\u300008.android:layout_height="wrap_content"
\u3000\u300009.android:text="@string/hello"/>
\u3000\u300010.<EditText
\u3000\u300011.android:id="@+id/ed_name"
\u3000\u300012.android:layout_width="match_parent"
\u3000\u300013.android:layout_height="wrap_content"
\u3000\u300014.android:layout_gravity="center_horizontal"
\u3000\u300015.android:layout_marginLeft="5dp"
\u3000\u300016.android:layout_marginRight="5dp"/>
\u3000\u300017.<Button
\u3000\u300018.android:id="@+id/btn_show"
\u3000\u300019.android:layout_width="109dp"
\u3000\u300020.android:layout_height="wrap_content"
\u3000\u300021.android:layout_gravity="center_horizontal"
\u3000\u300022.android:text="@string/btn_show"/>
\u3000\u300023.
\u3000\u3000
\u3000\u3000<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
\u3000\u3000android:layout_width="fill_parent"
\u3000\u3000android:layout_height="fill_parent"
\u3000\u3000android:orientation="vertical">
\u3000\u3000<TextView
\u3000\u3000android:layout_width="fill_parent"
\u3000\u3000android:layout_height="wrap_content"
\u3000\u3000android:text="@string/hello"/>
\u3000\u3000<EditText
\u3000\u3000android:id="@+id/ed_name"
\u3000\u3000android:layout_width="match_parent"
\u3000\u3000android:layout_height="wrap_content"
\u3000\u3000android:layout_gravity="center_horizontal"
\u3000\u3000android:layout_marginLeft="5dp"
\u3000\u3000android:layout_marginRight="5dp"/>
\u3000\u3000<Button
\u3000\u3000android:id="@+id/btn_show"
\u3000\u3000android:layout_width="109dp"
\u3000\u3000android:layout_height="wrap_content"
\u3000\u3000android:layout_gravity="center_horizontal"
\u3000\u3000android:text="@string/btn_show"/>
\u3000\u3000
\u3000\u3000\u6211\u4eec\u5728\u4e3b\u754c\u9762\u4e0a\u6dfb\u52a0\u4e86\u4e00\u4e2aEditText\u63a7\u4ef6\u548c\u4e00\u4e2aButton\u63a7\u4ef6\u3002
\u3000\u3000\uff083\uff09\u7f16\u8f91JNITest.java\u6587\u4ef6
\u3000\u3000[java] view plaincopyprint?
\u3000\u300001.packageorg.tonny.jni;
\u3000\u300002.
\u3000\u300003.importandroid.app.Activity;
\u3000\u300004.importandroid.os.Bundle;
\u3000\u300005.importandroid.view.View;
\u3000\u300006.importandroid.widget.EditText;
\u3000\u300007.importandroid.widget.Button;
\u3000\u300008.
\u3000\u300009.
\u3000\u300010.publicclassJNITestextendsActivity {
\u3000\u300011.static{
\u3000\u300012.System.loadLibrary("JNITest");
\u3000\u300013.}
\u3000\u300014.privatenativeString GetReply();
\u3000\u300015.privateEditTextedtName;
\u3000\u300016.privateButtonbtnShow;
\u3000\u300017.Stringreply;
\u3000\u300018./**Called when the activity is first created. */
\u3000\u300019.@Override
\u3000\u300020.publicvoidonCreate(Bundle savedInstanceState) {
\u3000\u300021.super.onCreate(savedInstanceState);
\u3000\u300022.setContentView(R.layout.main);
\u3000\u300023.reply= GetReply();
\u3000\u300024.edtName= (EditText)this.findViewById(R.id.ed_name);
\u3000\u300025.btnShow= (Button)this.findViewById(R.id.btn_show);
\u3000\u300026.btnShow.setOnClickListener(newButton.OnClickListener() {
\u3000\u300027.publicvoidonClick(View arg0) {
\u3000\u300028.edtName.setText(reply);
\u3000\u300029.}
\u3000\u300030.});
\u3000\u300031.}
\u3000\u300032.}
\u3000\u3000packageorg.tonny.jni;
\u3000\u3000importandroid.app.Activity;
\u3000\u3000importandroid.os.Bundle;
\u3000\u3000importandroid.view.View;
\u3000\u3000importandroid.widget.EditText;
\u3000\u3000importandroid.widget.Button;
\u3000\u3000publicclassJNITestextendsActivity {
\u3000\u3000static{
\u3000\u3000System.loadLibrary("JNITest");
\u3000\u3000}
\u3000\u3000privatenativeString GetReply();
\u3000\u3000privateEditTextedtName;
\u3000\u3000privateButtonbtnShow;
\u3000\u3000Stringreply;
\u3000\u3000/**Called when the activity is first created. */
\u3000\u3000@Override
\u3000\u3000publicvoidonCreate(Bundle savedInstanceState) {
\u3000\u3000super.onCreate(savedInstanceState);
\u3000\u3000setContentView(R.layout.main);
\u3000\u3000reply= GetReply();
\u3000\u3000edtName= (EditText)this.findViewById(R.id.ed_name);
\u3000\u3000btnShow= (Button)this.findViewById(R.id.btn_show);
\u3000\u3000btnShow.setOnClickListener(newButton.OnClickListener() {
\u3000\u3000publicvoidonClick(View arg0) {
\u3000\u3000edtName.setText(reply);
\u3000\u3000}
\u3000\u3000});
\u3000\u3000}
\u3000\u3000}
\u3000\u3000\u6211\u4eec\u770b\u8fd9\u4e00\u6bb5\u4ee3\u7801\uff1a
\u3000\u3000[java] view plaincopyprint?
\u3000\u300001.static{
\u3000\u300002.System.loadLibrary("JNITest");
\u3000\u300003.}
\u3000\u3000static{
\u3000\u3000System.loadLibrary("JNITest");
\u3000\u3000}
\u3000\u3000static\u8868\u793a\u5728\u7cfb\u7edf\u7b2c\u4e00\u6b21\u52a0\u8f7d\u7c7b\u7684\u65f6\u5019\uff0c\u5148\u6267\u884c\u8fd9\u4e00\u6bb5\u4ee3\u7801\uff0c\u5728\u8fd9\u91cc\u8868\u793a\u52a0\u8f7d\u52a8\u6001\u5e93libJNITest.so\u6587\u4ef6\u3002
\u3000\u3000\u518d\u770b\u8fd9\u4e00\u6bb5\uff1a
\u3000\u3000[java] view plaincopyprint?
\u3000\u300001.privatenativeString GetReply();
\u3000\u3000privatenativeString GetReply();
\u3000\u3000native\u8868\u793a\u8fd9\u4e2a\u65b9\u6cd5\u7531\u672c\u5730\u4ee3\u7801\u5b9a\u4e49\uff0c\u9700\u8981\u901a\u8fc7jni\u63a5\u53e3\u8c03\u7528\u672c\u5730c/c++\u4ee3\u7801\u3002
\u3000\u3000[java] view plaincopyprint?
\u3000\u300001.publicvoidonClick(View arg0) {
\u3000\u300002.edtName.setText(reply);
\u3000\u300003.}
\u3000\u3000publicvoidonClick(View arg0) {
\u3000\u3000edtName.setText(reply);
\u3000\u3000}
\u3000\u3000\u8fd9\u6bb5\u4ee3\u7801\u8868\u793a\u70b9\u51fb\u6309\u94ae\u540e\uff0c\u628anative\u65b9\u6cd5\u7684\u8fd4\u56de\u7684\u5b57\u7b26\u4e32\u663e\u793a\u5230EditText\u63a7\u4ef6\u3002
\u3000\u3000\uff084\uff09\u7f16\u8bd1\u5de5\u7a0b\uff0c\u751f\u6210.class\u6587\u4ef6\u3002
\u7b2c\u4e00\u6b65\uff1a
\u3000\u3000\u4f7f\u7528Java\u7f16\u5199HelloWorld \u7684Android\u5e94\u7528\u7a0b\u5e8f\uff1a
\u3000\u3000\u590d\u5236\u4ee3\u7801
\u3000\u3000package com.lucyfyr;
\u3000\u3000import android.app.Activity;
\u3000\u3000import android.os.Bundle;
\u3000\u3000import android.util.Log;
\u3000\u3000public class HelloWorld extends Activity {
\u3000\u3000/** Called when the activity is first created. */
\u3000\u3000@Override
\u3000\u3000public void onCreate(Bundle savedInstanceState) {
\u3000\u3000super.onCreate(savedInstanceState);
\u3000\u3000setContentView(R.layout.main);
\u3000\u3000Log.v("dufresne", printJNI("I am HelloWorld Activity"));
\u3000\u3000}
\u3000\u3000static
\u3000\u3000{
\u3000\u3000//\u52a0\u8f7d\u5e93\u6587\u4ef6
\u3000\u3000System.loadLibrary("HelloWorldJni");
\u3000\u3000}
\u3000\u3000//\u58f0\u660e\u539f\u751f\u51fd\u6570 \u53c2\u6570\u4e3aString\u7c7b\u578b \u8fd4\u56de\u7c7b\u578b\u4e3aString
\u3000\u3000private native String printJNI(String inputStr);
\u3000\u3000}
\u3000\u3000\u590d\u5236\u4ee3\u7801
\u3000\u3000
\u3000\u3000\u8fd9\u4e00\u6b65\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528eclipse\u6765\u751f\u6210\u4e00\u4e2aApp\uff1b
\u3000\u3000\u56e0\u4e3aeclipse\u4f1a\u81ea\u52a8\u4e3a\u6211\u4eec\u7f16\u8bd1\u6b64Java\u6587\u4ef6\uff0c\u540e\u9762\u8981\u662f\u7528\u5230\u3002
\u3000\u3000\u7b2c\u4e8c\u6b65\uff1a
\u3000\u3000\u751f\u6210\u5171\u4eab\u5e93\u7684\u5934\u6587\u4ef6\uff1a
\u3000\u3000\u8fdb\u5165\u5230eclipse\u751f\u6210\u7684Android Project\u4e2d \uff1a/HelloWorld/bin/classes/com/lucyfyr/ \u4e0b\uff1a
\u3000\u3000\u53ef\u4ee5\u770b\u5230\u91cc\u9762\u540e\u5f88\u591a\u540e\u7f00\u4e3a.class\u7684\u6587\u4ef6\uff0c\u5c31\u662feclipse\u4e3a\u6211\u4eec\u81ea\u52a8\u7f16\u8bd1\u597d\u4e86\u7684java\u6587\u4ef6\uff0c\u5176\u4e2d\u5c31\u6709\uff1a
\u3000\u3000HelloWorld.class\u6587\u4ef6\u3002
\u3000\u3000\u9000\u56de\u5230classes\u4e00\u7ea7\u76ee\u5f55\uff1a/HelloWorld/bin/classes/
\u3000\u3000\u6267\u884c\u5982\u4e0b\u547d\u4ee4\uff1a
\u3000\u3000javah com.lucyfyr.HelloWorld
\u3000\u3000\u751f\u6210\u6587\u4ef6:com_lucyfyr_HelloWorld.h
\u3000\u3000
\u3000\u3000\u590d\u5236\u4ee3\u7801
\u3000\u3000/* DO NOT EDIT THIS FILE - it is machine generated */
\u3000\u3000#include
\u3000\u3000/* Header for class com_lucyfyr_HelloWorld */
\u3000\u3000#ifndef _Included_com_lucyfyr_HelloWorld
\u3000\u3000#define _Included_com_lucyfyr_HelloWorld
\u3000\u3000#ifdef __cplusplus
\u3000\u3000extern "C" {
\u3000\u3000#endif
\u3000\u3000/*
\u3000\u3000* Class: com_lucyfyr_HelloWorld
\u3000\u3000* Method: printJNI
\u3000\u3000* Signature: (Ljava/lang/String;)Ljava/lang/String;
\u3000\u3000*/
\u3000\u3000JNIEXPORT jstring JNICALL Java_com_lucyfyr_HelloWorld_printJNI
\u3000\u3000(JNIEnv *, jobject, jstring);
\u3000\u3000#ifdef __cplusplus
\u3000\u3000}
\u3000\u3000#endif
\u3000\u3000#endif
\u3000\u3000\u590d\u5236\u4ee3\u7801
\u3000\u3000
\u3000\u3000\u53ef\u4ee5\u770b\u5230\u81ea\u52a8\u751f\u6210\u5bf9\u5e94\u7684\u51fd\u6570\uff1aJava_com_lucyfyr_HelloWorld_printJNI
\u3000\u3000Java_ + \u5305\u540d\uff08com.lucyfyr\uff09 + \u7c7b\u540d(HelloWorld) + \u63a5\u53e3\u540d(printJNI)\uff1a\u5fc5\u987b\u8981\u6309\u6b64JNI\u89c4\u8303\u6765\u64cd\u4f5c\uff1b
\u3000\u3000java\u865a\u62df\u673a\u5c31\u53ef\u4ee5\u5728com.simon.HelloWorld\u7c7b\u8c03\u7528printJNI\u63a5\u53e3\u7684\u65f6\u5019\u81ea\u52a8\u627e\u5230\u8fd9\u4e2aC\u5b9e\u73b0\u7684Native\u51fd\u6570\u8c03\u7528\u3002
\u3000\u3000\u5f53\u7136\u51fd\u6570\u540d\u592a\u957f\uff0c\u53ef\u4ee5\u5728.c\u6587\u4ef6\u4e2d\u901a\u8fc7\u51fd\u6570\u540d\u6620\u5c04\u8868\u6765\u5b9e\u73b0\u7b80\u5316\u3002
\u3000\u3000\u7b2c\u4e09\u6b65\uff1a
\u3000\u3000\u5b9e\u73b0JNI\u539f\u751f\u51fd\u6570\u6e90\u6587\u4ef6\uff1a
\u3000\u3000\u65b0\u5efacom_lucyfyr_HelloWorld.c\u6587\u4ef6\uff1a
\u3000\u3000
\u3000\u3000\u590d\u5236\u4ee3\u7801
\u3000\u3000#include
\u3000\u3000#define LOG_TAG "HelloWorld"
\u3000\u3000#include
\u3000\u3000/* Native interface, it will be call in java code */
\u3000\u3000JNIEXPORT jstring JNICALL Java_com_lucyfyr_HelloWorld_printJNI(JNIEnv *env, jobject obj,jstring inputStr)
\u3000\u3000{
\u3000\u3000LOGI("dufresne Hello World From libhelloworld.so!");
\u3000\u3000// \u4ece instring \u5b57\u7b26\u4e32\u53d6\u5f97\u6307\u5411\u5b57\u7b26\u4e32 UTF \u7f16\u7801\u7684\u6307\u9488
\u3000\u3000const char *str =
\u3000\u3000(const char *)(*env)->GetStringUTFChars( env,inputStr, JNI_FALSE );
\u3000\u3000LOGI("dufresne--->%s",(const char *)str);
\u3000\u3000// \u901a\u77e5\u865a\u62df\u673a\u672c\u5730\u4ee3\u7801\u4e0d\u518d\u9700\u8981\u901a\u8fc7 str \u8bbf\u95ee Java \u5b57\u7b26\u4e32\u3002
\u3000\u3000(*env)->ReleaseStringUTFChars(env, inputStr, (const char *)str );
\u3000\u3000return (*env)->NewStringUTF(env, "Hello World! I am Native interface");
\u3000\u3000}
\u3000\u3000/* This function will be call when the library first be load.
\u3000\u3000* You can do some init in the libray. return which version jni it support.
\u3000\u3000*/
\u3000\u3000jint JNI_OnLoad(JavaVM* vm, void* reserved)
\u3000\u3000{
\u3000\u3000void *venv;
\u3000\u3000LOGI("dufresne----->JNI_OnLoad!");
\u3000\u3000if ((*vm)->GetEnv(vm, (void**)&venv, JNI_VERSION_1_4) != JNI_OK) {
\u3000\u3000LOGE("dufresne--->ERROR: GetEnv failed");
\u3000\u3000return -1;
\u3000\u3000}
\u3000\u3000return JNI_VERSION_1_4;
\u3000\u3000}
\u3000\u3000\u590d\u5236\u4ee3\u7801
\u3000\u3000
\u3000\u3000OnLoadJava_com_lucyfyr_HelloWorld_printJNI
\u3000\u3000\u51fd\u6570\u91cc\u9762\u505a\u4e00\u4e9blog\u8f93\u51fa \u6ce8\u610fJNI\u4e2d\u7684log\u8f93\u51fa\u7684\u4e0d\u540c\u3002
\u3000\u3000JNI_OnLoad\u51fd\u6570JNI\u89c4\u8303\u5b9a\u4e49\u7684\uff0c\u5f53\u5171\u4eab\u5e93\u7b2c\u4e00\u6b21\u88ab\u52a0\u8f7d\u7684\u65f6\u5019\u4f1a\u88ab\u56de\u8c03\uff0c
\u3000\u3000\u8fd9\u4e2a\u51fd\u6570\u91cc\u9762\u53ef\u4ee5\u8fdb\u884c\u4e00\u4e9b\u521d\u59cb\u5316\u5de5\u4f5c\uff0c\u6bd4\u5982\u6ce8\u518c\u51fd\u6570\u6620\u5c04\u8868\uff0c\u7f13\u5b58\u4e00\u4e9b\u53d8\u91cf\u7b49\uff0c
\u3000\u3000\u6700\u540e\u8fd4\u56de\u5f53\u524d\u73af\u5883\u6240\u652f\u6301\u7684JNI\u73af\u5883\u3002\u672c\u4f8b\u53ea\u662f\u7b80\u5355\u7684\u8fd4\u56de\u5f53\u524dJNI\u73af\u5883\u3002
\u3000\u3000
\u3000\u3000\u7b2c\u56db\u6b65\uff1a
\u3000\u3000\u7f16\u8bd1\u751f\u6210so\u5e93
\u3000\u3000\u7f16\u8bd1com_lucyfyr_HelloWorld.c\u6210so\u5e93\u53ef\u4ee5\u548capp\u4e00\u8d77\u7f16\u8bd1\uff0c\u4e5f\u53ef\u4ee5\u90fd\u5355\u72ec\u7f16\u8bd1\u3002
\u3000\u3000\u5728\u5f53\u524d\u76ee\u5f55\u4e0b\u5efa\u7acbjni\u6587\u4ef6\u5939\uff1aHelloWorld/jni/
\u3000\u3000\u4e0b\u5efa\u7acbAndroid.mk \uff0c\u5e76\u5c06com_lucyfyr_HelloWorld.c\u548c com_lucyfyr_HelloWorld.h \u62f7\u8d1d\u5230\u8fdb\u53bb
\u3000\u3000\u7f16\u5199\u7f16\u8bd1\u751f\u6210so\u5e93\u7684Android.mk\u6587\u4ef6\uff1a
\u3000\u3000
\u3000\u3000\u590d\u5236\u4ee3\u7801
\u3000\u3000LOCAL_PATH:= $(call my-dir)
\u3000\u3000# \u4e00\u4e2a\u5b8c\u6574\u6a21\u5757\u7f16\u8bd1
\u3000\u3000include $(CLEAR_VARS)
\u3000\u3000LOCAL_SRC_FILES:=com_lucyfyr_HelloWorld.c
\u3000\u3000LOCAL_C_INCLUDES := $(JNI_H_INCLUDE)
\u3000\u3000LOCAL_MODULE := libHelloWorldJni
\u3000\u3000LOCAL_SHARED_LIBRARIES := libutils
\u3000\u3000LOCAL_PRELINK_MODULE := false
\u3000\u3000LOCAL_MODULE_TAGS :=optional
\u3000\u3000include $(BUILD_SHARED_LIBRARY)
\u3000\u3000\u590d\u5236\u4ee3\u7801
\u3000\u3000
\u3000\u3000\u7cfb\u7edf\u53d8\u91cf\u89e3\u6790\uff1a
\u3000\u3000LOCAL_PATH - \u7f16\u8bd1\u65f6\u7684\u76ee\u5f55
\u3000\u3000$(call \u76ee\u5f55\uff0c\u76ee\u5f55\u2026.) \u76ee\u5f55\u5f15\u5165\u64cd\u4f5c\u7b26
\u3000\u3000\u5982\u8be5\u76ee\u5f55\u4e0b\u6709\u4e2a\u6587\u4ef6\u5939\u540d\u79f0 src\uff0c\u5219\u53ef\u4ee5\u8fd9\u6837\u5199 $(call src)\uff0c\u90a3\u4e48\u5c31\u4f1a\u5f97\u5230 src \u76ee\u5f55\u7684\u5b8c\u6574\u8def\u5f84
\u3000\u3000include $(CLEAR_VARS) -\u6e05\u9664\u4e4b\u524d\u7684\u4e00\u4e9b\u7cfb\u7edf\u53d8\u91cf
\u3000\u3000LOCAL_MODULE \uff0d \u7f16\u8bd1\u751f\u6210\u7684\u76ee\u6807\u5bf9\u8c61
\u3000\u3000LOCAL_SRC_FILES \uff0d \u7f16\u8bd1\u7684\u6e90\u6587\u4ef6
\u3000\u3000LOCAL_C_INCLUDES \uff0d \u9700\u8981\u5305\u542b\u7684\u5934\u6587\u4ef6\u76ee\u5f55
\u3000\u3000LOCAL_SHARED_LIBRARIES \uff0d \u94fe\u63a5\u65f6\u9700\u8981\u7684\u5916\u90e8\u5e93
\u3000\u3000LOCAL_PRELINK_MODULE \uff0d \u662f\u5426\u9700\u8981prelink\u5904\u7406
\u3000\u3000include$\uff08BUILD_SHARED_LIBRARY\uff09 \uff0d \u6307\u660e\u8981\u7f16\u8bd1\u6210\u52a8\u6001\u5e93
我们知道，Android系统的底层库由c/c++编写，上层Android应用程序通过Java虚拟机调用底层接口，衔接底层c/c++库与Java应用程序间的接口正是JNI（JavaNative Interface)。本文描述了如何在ubuntu下配置AndroidJNI的开发环境，以及如何编写一个简单的c函数库和JNI接口，并通过编写Java程序调用这些接口，最终运行在模拟器上的过程。
2.环境配置
2.1.安装jdk1.6
（1）从jdk官方网站下载jdk-6u29-linux-i586.bin文件。
（2）执行jdk安装文件
[html] view plaincopyprint?
01.$chmod a+x jdk-6u29-linux-i586.bin
02.$jdk-6u29-linux-i586.bin
$chmod a+x jdk-6u29-linux-i586.bin
$jdk-6u29-linux-i586.bin
(3)配置jdk环境变量
[html] view plaincopyprint?
01.$sudo vim /etc/profile
02.#JAVAEVIRENMENT
03.exportJAVA_HOME=/usr/lib/java/jdk1.6.0_29
04.exportJRE_HOME=$JAVA_HOME/jre
05.exportCLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
06.exportPATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
$sudo vim /etc/profile
#JAVAEVIRENMENT
exportJAVA_HOME=/usr/lib/java/jdk1.6.0_29
exportJRE_HOME=$JAVA_HOME/jre
exportCLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
exportPATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
保存后退出编辑，并重启系统。
（4）验证安装
[html] view plaincopyprint?
01.$java -version
02.javaversion "1.6.0_29"
03.Java(TM)SE Runtime Environment (build 1.6.0_29-b11)
04.JavaHotSpot(TM) Server VM (build 20.4-b02, mixed mode)
05.$javah
06.用法：javah[选项]<类>
07.其中[选项]包括：
08.-help输出此帮助消息并退出
09.-classpath<路径>用于装入类的路径
10.-bootclasspath<路径>用于装入引导类的路径
11.-d<目录>输出目录
12.-o<文件>输出文件（只能使用-d或-o中的一个）
13.-jni生成JNI样式的头文件（默认）
14.-version输出版本信息
15.-verbose启用详细输出
16.-force始终写入输出文件
17.使用全限定名称指定<类>（例
18.如，java.lang.Object）。
$java -version
javaversion "1.6.0_29"
Java(TM)SE Runtime Environment (build 1.6.0_29-b11)
JavaHotSpot(TM) Server VM (build 20.4-b02, mixed mode)
$javah
用法：javah[选项]<类>
其中[选项]包括：
-help输出此帮助消息并退出
-classpath<路径>用于装入类的路径
-bootclasspath<路径>用于装入引导类的路径
-d<目录>输出目录
-o<文件>输出文件（只能使用-d或-o中的一个）
-jni生成JNI样式的头文件（默认）
-version输出版本信息
-verbose启用详细输出
-force始终写入输出文件
使用全限定名称指定<类>（例
如，java.lang.Object）。2.2.安装android应用程序开发环境
ubuntu下安装android应用程序开发环境与windows类似，依次安装好以下软件即可：
（1）Eclipse
（2）ADT
（3）AndroidSDK
与windows下安装唯一不同的一点是，下载这些软件的时候要下载Linux版本的安装包。
安装好以上android应用程序的开发环境后，还可以选择是否需要配置emulator和adb工具的环境变量，以方便在进行JNI开发的时候使用。配置步骤如下：
把emulator所在目录android-sdk-linux/tools以及adb所在目录android-sdk-linux/platform-tools添加到环境变量中，android-sdk-linux指androidsdk安装包android-sdk_rxx-linux的解压目录。
[plain] view plaincopyprint?
01.$sudo vim /etc/profile
02.exportPATH=~/software/android/android-sdk-linux/tools:$PATH
03. exportPATH=~/software/android/android-sdk-linux/platform-tools:$PATH
$sudo vim /etc/profile
exportPATH=~/software/android/android-sdk-linux/tools:$PATH
exportPATH=~/software/android/android-sdk-linux/platform-tools:$PATH
编辑完毕后退出，并重启生效。
2.3.安装NDK
NDK是由android提供的编译android本地代码的一个工具。
（1）从androidndk官网http://developer.android.com/sdk/ndk/index.html下载ndk，目前最新版本为android-ndk-r6b-linux-x86.tar.bz2.
（2）解压ndk到工作目录：
[plain] view plaincopyprint?
01.$tar -xvf android-ndk-r6b-linux-x86.tar.bz2
02.$sudo mv android-ndk-r6b /usr/local/ndk
$tar -xvf android-ndk-r6b-linux-x86.tar.bz2
$sudo mv android-ndk-r6b /usr/local/ndk
（3）设置ndk环境变量
[plain] view plaincopyprint?
01.$sudo vim /etc/profile
02.exportPATH=/usr/local/ndk:$PATH
$sudo vim /etc/profile
exportPATH=/usr/local/ndk:$PATH
编辑完毕后保存退出，并重启生效
（4）验证安装
[plain] view plaincopyprint?
01.$ cd/usr/local/ndk/samples/hello-jni/
02.$ ndk-build
03.Gdbserver : [arm-linux-androideabi-4.4.3] libs/armeabi/gdbserver
04.Gdbsetup : libs/armeabi/gdb.setup
05.Install : libhello-jni.so => libs/armeabi/libhello-jni.so
$ cd/usr/local/ndk/samples/hello-jni/
$ ndk-build
Gdbserver : [arm-linux-androideabi-4.4.3] libs/armeabi/gdbserver
Gdbsetup : libs/armeabi/gdb.setup
Install : libhello-jni.so => libs/armeabi/libhello-jni.so
3.JNI实现
我们需要定义一个符合JNI接口规范的c/c++接口，这个接口不用太复杂，例如输出一个字符串。接下来，则需要把c/c++接口的代码文件编译成共享库（动态库）.so文件，并放到模拟器的相关目录下。最后，启动Java应用程序，就可以看到最终效果了。
3.1.编写Java应用程序代码
（1）启动Eclipse，新建android工程
Project：JNITest
Package：org.tonny.jni
Activity：JNITest
（2）编辑资源文件
编辑res/values/strings.xml文件如下：
编辑res/layout/main.xml文件
我们在主界面上添加了一个EditText控件和一个Button控件。
（3）编辑JNITest.java文件
static表示在系统第一次加载类的时候，先执行这一段代码，在这里表示加载动态库libJNITest.so文件。
再看这一段：
[java] view plaincopyprint?
01.privatenativeString GetReply();
privatenativeString GetReply();
native表示这个方法由本地代码定义，需要通过jni接口调用本地c/c++代码。
[java] view plaincopyprint?
01.publicvoidonClick(View arg0) {
02.edtName.setText(reply);
03.}
publicvoidonClick(View arg0) {
edtName.setText(reply);
}
这段代码表示点击按钮后，把native方法的返回的字符串显示到EditText控件。
（4）编译工程，生成.class文件。
3.2.用javah工具生成符合JNI规范的c语言头文件
在终端中，进入android工程所在的bin目录
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01.$cd ~/project/Android/JNITest/bin
$cd ~/project/Android/JNITest/bin
我们用ls命令查看，可以看到bin目录下有个classes目录，其目录结构为classes/org/tonny/jni，即classes的子目录结构是android工程的包名org.tonny.jni。请注意，下面我们准备执行javah命令的时候，必须进入到org/tonny/jni的上级目录，即classes目录，否则javah会提示找不到相关的java类。
下面继续：
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01.$cd classes
02.$javah org.tonny.jni.JNITest
03.$ls
04.org org_tonny_jni_JNITest.h
$cd classes
$javah org.tonny.jni.JNITest
$ls
org org_tonny_jni_JNITest.h
执行javahorg.tonny.jni.JNITest命令，在classes目录下会生成org_tonny_jni_JNITest.h头文件。如果不进入到classes目录下的话，也可以这样：
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01.$javah -classpath ~/project/Android/JNITest/bin/classesorg.tonny.jni.JNITest
$javah -classpath ~/project/Android/JNITest/bin/classesorg.tonny.jni.JNITest
-classpath 参数表示装载类的目录。
3.3.编写c/c++代码
生成org_tonny_jni_JNITest.h头文件后，我们就可以编写相应的函数代码了。下面在android工程目录下新建jni目录，即~/project/Android/JNITest/jni，把org_tonny_jni_JNITest.h头文件拷贝到jni目录下，并在jni目录下新建org_tonny_jni_JNITest.c文件，编辑代码如下：
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01.#include<jni.h>
02.#include<string.h>
03.#include"org_tonny_jni_JNITest.h"
04.
05.
06.JNIEXPORTjstring JNICALLJava_org_tonny_jni_JNITest_GetReply
07.(JNIEnv *env, jobject obj){
08.return(*env)->NewStringUTF(env,(char*)"Hello,JNITest");
09.}
#include<jni.h>
#include<string.h>
#include"org_tonny_jni_JNITest.h"
JNIEXPORTjstring JNICALLJava_org_tonny_jni_JNITest_GetReply
(JNIEnv *env, jobject obj){
return(*env)->NewStringUTF(env,(char*)"Hello,JNITest");
}
我们可以看到，该函数的实现相当简单，返回一个字符串为："Hello,JNITest"
3.4.编写Android.mk文件
在~/project/Android/JNITest/jni目录下新建Android.mk文件，android可以根据这个文件的编译参数编译模块。编辑Android.mk文件如下：
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01.LOCAL_PATH:= $(call my-dir)
02.include$(CLEAR_VARS)
03.LOCAL_MODULE := libJNITest
04.LOCAL_SRC_FILES:= org_tonny_jni_JNITest.c
05.include$(BUILD_SHARED_LIBRARY)
LOCAL_PATH:= $(call my-dir)
include$(CLEAR_VARS)
LOCAL_MODULE := libJNITest
LOCAL_SRC_FILES:= org_tonny_jni_JNITest.c
include$(BUILD_SHARED_LIBRARY)
LOCAL_MODULE表示编译的动态库名称
LOCAL_SRC_FILES 表示源代码文件
3.5.用ndk工具编译并生成.so文件
进入到JNITest的工程目录，执行ndk-build命令即可生成libJNITest.so文件。
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01.$cd ~/project/Android/JNITest/
02.$ndk-build
03.Invalidattribute name:
04.package
05.Install : libJNITest.so => libs/armeabi/libJNITest.so
$cd ~/project/Android/JNITest/
$ndk-build
Invalidattribute name:
package
Install : libJNITest.so => libs/armeabi/libJNITest.so
可以看到，在工程目录的libs/armeabi目录下生成了libJNITest.so文件。
3.6.在模拟器上运行
（1）首先，我们把android模拟器启动起来。进入到emulator所在目录，执行emulator命令：
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01.$cd ~/software/android/android-sdk-linux/tools
02.$./emulator @AVD-2.3.3-V10 -partition-size 512
$cd ~/software/android/android-sdk-linux/tools
$./emulator @AVD-2.3.3-V10 -partition-size 512
AVD-2.3.3-V10表示你的模拟器名称，与在Eclipse->AVDManager下的AVDName对应，-partition-size表示模拟器的存储设备容量。
（2）接下来，我们需要把libJNITest.so文件拷贝到模拟器的/system/lib目录下，执行以下命令：
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01.$cd ~/project/Android/JNITest/libs/armeabi/
02.$adb remount
03.$adb push libJNITest.so /system/lib
04.80 KB/s (10084 bytes in 0.121s)
$cd ~/project/Android/JNITest/libs/armeabi/
$adb remount
$adb push libJNITest.so /system/lib
80 KB/s (10084 bytes in 0.121s)
当在终端上看到有80 KB/s (10084 bytes in 0.121s)传输速度等信息的时候，说明拷贝成功。
（3）在终端上执行JNITest程序，这个我们可以在Eclipse下，右键点击JNITest工程，RunAs->Android Application，即可在模拟器上启动程序
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