intent 方式 安装指定apk

  安装指定apk

public void setupAPK(String apkname){
String fileName = Environment.getExternalStorageDirectory() + " / " + apkname;
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile( new File(fileName)), " application/vnd.android.package-archive " );
mService.startActivity(intent);
}