APP增量更新

 //先加载so库
    static {
        System.loadLibrary("ApkPatchLibrary");
    }
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    public void downloadNewApk(View view){
        //由于是个耗时操作，需要异步任务
        new AsyncTask<Void,Void,Integer>(){
            //3.合成后的新apk文件路径
            String newApkPath = Environment.getExternalStorageDirectory()+"/WeiboNew.apk";
            @Override
            protected Integer doInBackground(Void... params) {
                //1.先从服务器下载patch补丁包
                File patchFile = downloadPatchFile();
                String patchPath = patchFile.getAbsolutePath();
                //2.获取当前版本apk文件的路径
                String appPath = "/data/app/com.sina.weibo-1.apk";
                return PatchUtils.patch(appPath,newApkPath,patchPath);
            }
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            @Override
            protected void onPostExecute(Integer integer) {
                super.onPostExecute(integer);
                if(integer==0){
                    //说明合成成功，那么开始安装
                    Toast.makeText(MainActivity.this, "合成成功！", Toast.LENGTH_SHORT).show();
                    ApkUtils.installApk(MainActivity.this,newApkPath);
                }else {
                    Toast.makeText(MainActivity.this, "合成失败!", Toast.LENGTH_SHORT).show();
                }
            }
        }.execute();
    }
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    private File downloadPatchFile() {
        return new File(Environment.getExternalStorageDirectory(),"weibo.patch");
    }