安装本地apk

//下载到本地后执行安装

private voidinstallAPK(File file) {

if(!file.exists())return;

Intent intent =newIntent(Intent.ACTION_VIEW);

Uri uri = Uri.parse("file://"+ file.toString());

intent.setDataAndType(uri,"application/vnd.android.package-archive");

//在服务中开启activity必须设置flag

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

context.startActivity(intent);

}