Android差分包生成和合成新包-bsdiff

本文章中用到的两个下载链接：
（1）电脑端差分包生成和合并工具
http://download.csdn.net/detail/suijing/9829716
（2）测试Demo项目源码下载地址
http://download.csdn.net/detail/suijing/9829722

测试验证环境：

Paste_Image.png

项目目录结构：

Paste_Image.png

build.gradle文件：


 apply plugin: 'com.android.application' 
 android {
 compileSdkVersion 23
 buildToolsVersion '23.0.1' 
 defaultConfig {
    applicationId "com.yuyh.inc.update"
    minSdkVersion 14
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"

    ndk{
        moduleName "ApkPatchLibrary"
        abiFilters "armeabi", "armeabi-v7a", "x86"
    }
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
sourceSets {
    main {
        jni.srcDirs = ['src/main/jni', 'src/main/jni/']
        // jniLibs.srcDirs = ['libs'] // 若不想编译jni代码，可直接引用so库，ndk编译相关脚本注释掉
    }
}
 
 } 
 dependencies {
 compile fileTree(include: ['*.jar'], dir: 'libs')
 testCompile 'junit:junit:4.12'
 compile 'com.android.support:appcompat-v7:23.+'
 }

核心代码：


 package com.yyh.lib; 
 import android.app.Activity;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.Handler;
 import android.os.Message;
 import android.view.View;
 import android.widget.ProgressBar;
 import android.widget.Toast; 
 import com.yuyh.inc.update.R;
 import com.yyh.lib.bsdiff.DiffUtils;
 import com.yyh.lib.bsdiff.PatchUtils;
 import com.yyh.lib.utils.FileUtils; 
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream; 
 public class MainActivity extends Activity { 
 private ProgressBar loadding;

// 成功
private static final int WHAT_SUCCESS = 1;
// 失败
private static final int WHAT_FAIL_PATCH = 0;
/**
 * 老版本apk
 */
private String oldApkDir = Environment.getExternalStorageDirectory().toString() + "/bsdiff_old.apk";
/**
 * 新版本apk
 */
private String newApkDir = Environment.getExternalStorageDirectory().toString() + "/bsdiff_new_build.apk";
/**
 * 根据新老版本差分包生成的新版本apk
 */
private String destDir2 = Environment.getExternalStorageDirectory().toString() + "/bsdiff_new.apk";
/**
 * 新老版本的增量更新包
 */
private String oldToNewPatchDir = Environment.getExternalStorageDirectory().toString() + "/old-to-new.patch";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    loadding = (ProgressBar) findViewById(R.id.loadding);
}

private Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
            case 0:
                Toast.makeText(getApplicationContext(), "复制成功", Toast.LENGTH_SHORT).show();
                break;
            case 1:
                Toast.makeText(getApplicationContext(), "复制失败", Toast.LENGTH_SHORT).show();
                break;
            case 2:
                Toast.makeText(getApplicationContext(), "生成增新包成功", Toast.LENGTH_SHORT).show();
                break;
            case 3:
                Toast.makeText(getApplicationContext(), "生成增新包失败", Toast.LENGTH_SHORT).show();
                break;
            case 4:
                Toast.makeText(getApplicationContext(), "合成新版本成功", Toast.LENGTH_SHORT).show();
                break;
            case 5:
                Toast.makeText(getApplicationContext(), "合成新版本失败", Toast.LENGTH_SHORT).show();
                break;
            default:
                break;
        }
    }
};

/**
 * 复制文件
 * @param view
 */
public void copy(View view) {
    loadding.setVisibility(View.VISIBLE);
    new CopyTask().execute(oldApkDir, "bsdiff_old.apk", newApkDir, "bsdiff_new.apk");
}

/**
 * 生成差分增量包
 * @param view
 */
public void bsdiff(View view) {
    loadding.setVisibility(View.VISIBLE);
    new DiffTask().execute();
}

/**
 * 合成新版本
 * @param view
 */
public void bspatch(View view) {
    loadding.setVisibility(View.VISIBLE);
    new PatchTask().execute();
}

/**
 * 安装老版本
 * @param view
 */
public void installOld(View view) {
    install(oldApkDir);
}

/**
 * 安装新版本
 * @param view
 */
public void installNew(View view) {
    install(destDir2);
}

/**
 * 复制文件线程
 */
private class CopyTask extends AsyncTask {
    @Override
    protected Integer doInBackground(String... params) {

        for (int i = 0; i < params.length; i += 2) {
            try {
                File file = new File(params[i]);
                if (!file.exists())
                    FileUtils.createFile(file);

                InputStream is;
                OutputStream os = new FileOutputStream(params[i]);
                is = getAssets().open(params[i + 1]);
                byte[] buffer = new byte[1024];
                int length = is.read(buffer);
                while (length > 0) {
                    os.write(buffer, 0, length);
                    length = is.read(buffer);
                }
                os.flush();
                is.close();
                os.close();
            } catch (Exception e) {
                handler.obtainMessage(1).sendToTarget();
                return null;
            }
        }
        handler.obtainMessage(0).sendToTarget();
        return null;
    }

    @Override
    protected void onPostExecute(Integer integer) {
        super.onPostExecute(integer);
        loadding.setVisibility(View.GONE);
    }
}

/**
 * 生成差分包线程
 *
 * @author yuyuhang
 * @date 2016-1-25 下午12:24:34
 */
private class DiffTask extends AsyncTask {

    @Override
    protected Integer doInBackground(String... params) {

        try {
            int result = DiffUtils.getInstance().genDiff(oldApkDir, newApkDir, oldToNewPatchDir);
            if (result == 0) {
                handler.obtainMessage(2).sendToTarget();
                return WHAT_SUCCESS;
            } else {
                handler.obtainMessage(3).sendToTarget();
                return WHAT_FAIL_PATCH;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return WHAT_FAIL_PATCH;
    }

    @Override
    protected void onPostExecute(Integer integer) {
        super.onPostExecute(integer);
        loadding.setVisibility(View.GONE);
    }
}

/**
 * 差分包合成APK线程
 *
 * @author yuyuhang
 * @date 2016-1-25 下午12:24:34
 */
private class PatchTask extends AsyncTask {

    @Override
    protected Integer doInBackground(String... params) {

        try {

            int result = PatchUtils.getInstance().patch(oldApkDir, destDir2, oldToNewPatchDir);
            if (result == 0) {
                handler.obtainMessage(4).sendToTarget();
                return WHAT_SUCCESS;
            } else {
                handler.obtainMessage(5).sendToTarget();
                return WHAT_FAIL_PATCH;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return WHAT_FAIL_PATCH;
    }

    @Override
    protected void onPostExecute(Integer integer) {
        super.onPostExecute(integer);
        loadding.setVisibility(View.GONE);
    }
}

/**
 * 安装软件
 * @param dir
 */
private void install(String dir) {
    String command = "chmod 777 " + dir;
    Runtime runtime = Runtime.getRuntime();
    try {
        runtime.exec(command); // 可执行权限
    } catch (IOException e) {
        e.printStackTrace();
    }

    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.setDataAndType(Uri.parse("file://" + dir), "application/vnd.android.package-archive");
    startActivity(intent);
}
 
 /* 
 public void appList(View view) {
    Intent intent = new Intent(this, ApplistActivity.class);
    startActivity(intent);
}
 
 */ 
 }