应用SDK与对外接口的封装、混淆与打包

从事Android开发久了不可避免的会接触对外接口的封装，下面本人就以自己写过的一个例子系统讲讲怎样对应用sdk的开发。

1.封装

我们在与其他公司合作的时候，往往会有技术方面的协作，但我们又不想过多的暴露我们某些技术方面的细节，比如：ip地址、技术参数、核心算法。

于是我们会对这部分代码进行封装，这部分需要精通Java的设计模式。

下面上传我的项目：



新建一个Android工程，添加一个Model：musicdot。

musicdot是本人自己解析百度音乐的歌曲搜索请求实现的在线搜歌功能包。所以我将要对这部分代码进行封装打包，以达到隐藏具体搜索请求的目的。（由于本项目中用到的百度音乐搜索接口涉及侵权，暂不暴露）

下面贴代码：

public class PlayMusicPresenter {
private PlayMusicModle uModel;
public void getMusic(Context context, String content, final UUView uView) {
uModel = new PlayMusicModle();
uModel.getResult(context, content, new UCallBack() {
@Override
public void onSuccess(String content, int code) {
uView.showContent(content, code);
}

@Override
public void onFail(String error) {
uView.showError(error);
}

});
}
}

public class PlayMusicModle {
private UCallBack callBack;

public void getResult(Context context, String content, UCallBack uCallBack) {
callBack = uCallBack;
searchSong(content);
}

private void searchSong(final String musicName) {
new Thread(new Runnable() {
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.addHeader("User-Agent", makeUA())
.url("搜索url" + musicName)
.build();
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
String responseData = response.body().string();
searchSongAdd(getSongId(responseData));
}
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();

}

private void searchSongAdd(final String songid) {
new Thread(new Runnable() {
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.addHeader("User-Agent", makeUA())
.url("搜索url" + songid)
.build();
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
String responseData = response.body().string();
callBack.onSuccess(getSongAddUrl(responseData), 0);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();

}

private String getSongId(String jsonData) {
String id = "";
id = jsonData.substring(jsonData.indexOf("songid\":\"") + 9, jsonData.indexOf("\",\"has_mv"));
return id;
}

private String getSongAddUrl(String songAdd) {
String add = "";
add = songAdd.substring(songAdd.indexOf("show_link\":\"") + 12, songAdd.indexOf("\",\"free"));
add = add.replace("\\", "");
return add;
}

private String makeUA() {
final String ua = Build.BRAND + "/" + Build.MODEL + "/" + Build.VERSION.RELEASE;
return ua;
}

上面Model中的两片主体代码是典型的MVP模式，思路清晰，不多做解释。下面贴上使用代码：

public class MainActivity extends AppCompatActivity{
MediaPlayer mp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mp=new MediaPlayer();
PlayMusicPresenter playMusicPresenter = new PlayMusicPresenter();
playMusicPresenter.getMusic(MainActivity.this, "稻香", new UUView() {
@Override
public void showContent(String content, int code) {
mp.reset();
try {
mp.setDataSource(content);
mp.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mp.start();
}

@Override
public void showError(String error) {

}
});
}
}

运行没问题。

2.混淆

在musicdot包的build.gradle中添加

task makeJar(type: proguard.gradle.ProGuardTask, dependsOn: "build") {
// 未混淆的jar路径
injars 'build/intermediates/bundles/release/classes.jar'
// 混淆后的jar输出路径
outjars 'build/outputs/music-dot-1.1.0.jar'
// 混淆协议
configuration 'proguard-rules.pro'
}

当然混淆规则proguard-rules.pro如下：

常规：

#表示混淆时不使用大小写混合类名
-dontusemixedcaseclassnames
#表示不跳过library中的非public的类
-dontskipnonpubliclibraryclasses
#打印混淆的详细信息
-verbose

# Optimization is turned off by default. Dex does not like code run
# through the ProGuard optimize and preverify steps (and performs some
# of these optimizations on its own).
-dontoptimize
##表示不进行校验,这个校验作用 在java平台上的
-dontpreverify
# Note that if you want to enable optimization, you cannot just
# include optimization flags in your own project configuration file;
# instead you will need to point to the
# "proguard-android-optimize.txt" file instead of this one from your
# project.properties file.

-keepattributes *Annotation*
-keep public class com.google.vending.licensing.ILicensingService
-keep public class com.android.vending.licensing.ILicensingService

# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native -keepclasseswithmembernames class * {
native <methods>;
}

# keep setters in Views so that animations can still work.
# see http://proguard.sourceforge.net/manual/examples.html#beans -keepclassmembers public class * extends android.view.View {
void set*(***);
*** get*();
}

# We want to keep methods in Activity that could be used in the XML attribute onClick
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}

# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations -keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}

-keepclassmembers class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator CREATOR;
}

-keepclassmembers class **.R$* {
public static <fields>;
}

# The support library contains references to newer platform versions.
# Don't warn about those in case this app is linking against an older
# platform version.  We know about them, and they are safe.
-dontwarn android.support.**

# Understand the @Keep support annotation.
-keep class android.support.annotation.Keep

-keep @android.support.annotation.Keep class * {*;}

-keepclasseswithmembers class * {
@android.support.annotation.Keep <methods>;
}

-keepclasseswithmembers class * {
@android.support.annotation.Keep <fields>;
}

-keepclasseswithmembers class * {
@android.support.annotation.Keep <init>(...);
}
#忽略警告
-ignorewarnings
#保证是独立的jar,没有任何项目引用,如果不写就会认为我们所有的代码是无用的,从而把所有的代码压缩掉,导出一个空的jar
-dontshrink
#保护泛型
-keepattributes Signature

本项目特殊：

-keep class com.gg.musicdot.PlayMusicPresenter{*;}
-keep class com.gg.musicdot.UUView{*;}
-keep class com.gg.musicdot.PlayMusicModle$* {*;}

此处须注意两点：

PlayMusicPresenter对外接口，不可混淆；PlayMusicModle含有匿名内部类，不可混淆。

没毛病。

3.打包

在terminal窗口中写入：gradlew makejar

回车



打包完成。

在输出目录中找到 ‘build/outputs/music-dot-1.1.0.jar’

4.使用

最后我们用在主项目中验证可行性：



完美。

源码及jar下载地址：http://download.csdn.net/download/zhoup324/10236589

5.结尾

在人间有谁活着不像是一场炼狱。