静默安装

public class AppUpgrade  {
    File file;
    String fullDownloadPath;
    
    Context wcontext;
    /**
     * 静态安装apk
     * @param url app下载的地址
     */
    public  AppUpgrade(String url) {
        file = downFile(url);
    }

    /**
     * 后台在下面一个Apk 下载完成后返回下载好的文件
     *
     * @param httpUrl
     * @return
     */
    private File downFile(final String httpUrl) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    URL url = new URL(httpUrl);
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setConnectTimeout(5000);
                    FileOutputStream fileOutputStream = null;
                    InputStream inputStream;
                    if (connection.getResponseCode() == 200) {
                        inputStream = connection.getInputStream();
                        Message message = mUpdateProgressHandler.obtainMessage();
                        message.what = 1;
                        mUpdateProgressHandler.sendMessage(message);
                        if (inputStream != null) {
                            file = getFile(httpUrl);
                            fileOutputStream = new FileOutputStream(file);
                            byte[] buffer = new byte[1024];
                            int length = 0;

                            while ((length = inputStream.read(buffer)) != -1) {
                                fileOutputStream.write(buffer, 0, length);
                            }
                            fileOutputStream.close();
                            fileOutputStream.flush();

                        }
                        inputStream.close();
                    }

                    fullDownloadPath = getDownloadFileFullPath(httpUrl);
                    Log.i("download", "run: "+"下载完成");

                    // 往handler发送一条消息 更改button的text属性
                    Message message = mUpdateProgressHandler.obtainMessage();
                    message.what = 2;
                    mUpdateProgressHandler.sendMessage(message);
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
        return file;
    }

    /**
     * 根据传过来url创建文件
     */
    private File getFile(String url) {

        File files = new File(Environment.getExternalStorageDirectory().getAbsoluteFile(), "Download" + getFilePath(url));
        return files;
    }

    private String getDownloadFileFullPath(String url) {
        Log.v("路径为：",Environment.getExternalStorageDirectory().getAbsoluteFile().toString() + "/Download");
        return Environment.getExternalStorageDirectory().getAbsoluteFile().toString() + "/Download" + getFilePath(url);
    }

    /**
     * 截取出url后面的apk的文件名
     * @param url
     * @return
     */
    private String getFilePath(String url) {
        return url.substring(url.lastIndexOf("/"), url.length());
    }

    /**
     * 接收消息
     */
    @SuppressLint("HandlerLeak")
    private Handler mUpdateProgressHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            Log.v("进度",""+msg);
            switch (msg.what){
                case 1:
                    Log.v("正在下载安装包...","");
                    break;
                case 2:
                    Log.i("installed:::::", fullDownloadPath);

                    int isInstalled = installCustomApp(fullDownloadPath);

                    // 检测安装成功后即可打开床旁APP，实现安装自启动
                    if (isInstalled == 1) {
                        Log.v("安装包静默安装完成","6666");
                    }
            }
        };
    };

    public int installCustomApp(String apkPath)
    {      
		RootCommand("pm install -r "+ fullDownloadPath);
        return 1;
    }

    /**
     * 安装apk
     * @param cmd 执行命令语法
     */
    public static void RootCommand(String cmd) {
        Process process = null;
        DataOutputStream os = null;
        DataInputStream is = null;
        try {
            process = Runtime.getRuntime().exec("su");
            os = new DataOutputStream(process.getOutputStream());
            os.writeBytes(cmd + "\n");
            os.writeBytes("exit\n");
            os.flush();
            int aa = process.waitFor();
            is = new DataInputStream(process.getInputStream());
            byte[] buffer = new byte[is.available()];
            is.read(buffer);
            String out = new String(buffer);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (os != null) {
                    os.close();
                }
                if (is != null) {
                    is.close();
                }
                process.destroy();
            } catch (Exception e) {
            }
        }
    }


    /**
     * 获取当前时间
     * @return 返回当前时间
     */
    public  static  String getTime(){
        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String sim = dateFormat.format(date);
        return  sim;
    }

}