Android下载文件（APP）并且静默安装

1 . 基于Android7.0 有系统签名才能静默安装

直接上代码

下载文件

 /**     *下载文件     *这里我是用的子线程     **/    public  void DownApkorSysrom( final  String  loadApkUrl ,final String savePath,final String saveFileName){        Thread thread=new Thread(new Runnable() {            @Override            public void run() {                try {                    URL url = new URL(loadApkUrl);                    Log.i(TAG,"updateManager download file url:"+loadApkUrl);                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();                    conn.connect();                    int length = conn.getContentLength();                    InputStream is = conn.getInputStream();                    File file;                    String filename;                    File downFile;                        file = new File(savePath);                        if (!file.exists()) {                            file.mkdir();                        }                        filename = saveFileName;                        downFile = new File(file,filename);                                      FileOutputStream fos = new FileOutputStream(downFile);                    int count = 0;                    byte buf[] = new byte[1024];                    do {                        int numread = is.read(buf);                        count += numread;                        // 更新进度                        int  progress = (int) (((float) count / length) * 100);                        Log.i(TAG,"down load progress:"+progress+" numread:"+numread);                        if (numread <= 0) {                           // 下载完成通知安装                            apkInstall(savePath+saveFileName);                            break;                        }                        fos.write(buf, 0, numread);                    } while (true);// 点击取消就停止下载.                } catch (MalformedURLException e) {                   Log.i(TAG,"down load MalformedURLException:"+e.toString());                    e.printStackTrace();                } catch (IOException e) {                   Log.i(TAG,"down load IOException TTTT:"+e.toString());                    e.printStackTrace();                }            }        });        thread.start();    }

2 . 静默安装

 /**     * 执行命令并且输出结果     */    public  boolean apkInstall(String path) {        Log.d(TAG,"SilentInstallActivity path:"+path);        Process p=null;        int value=-1;        try {            String docmd = "pm install -r -i com.amtcloud.amtphoneagent  --user 0 " +path;              p = Runtime.getRuntime().exec(docmd);             value = p.waitFor();        }catch (Exception e) {            Log.d(TAG, "SilentInstallActivity error: " + e);        }finally {            if(p!=null){                p.destroy();            }        }        return returnResult(value);    }

3 监听安装完成广播

public class SilenceInstallReceiver extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        // 接收安装广播        if (intent.getAction().equals("android.intent.action.PACKAGE_ADDED")||                intent.getAction().equals("android.intent.action.PACKAGE_REPLACED")) {//            startApp("com.amtzhmt.launcher",context);            Toast.makeText(context, "安装完成", Toast.LENGTH_LONG).show();        }    }    public void startApp(String appPackageName,Context context){        try{            Intent intent = context.getPackageManager().getLaunchIntentForPackage(appPackageName);            context.startActivity(intent);        }catch(Exception e){            Toast.makeText(context, "安装完成自启失败", Toast.LENGTH_LONG).show();        }    }}

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