如何在android应用中执行另一个android应用

如何在android应用中执行另一个android应用
InstallReceiver mInstallReceiver = new InstallReceiver();
                IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_INSTALL);
                filter.addAction(Intent.ACTION_PACKAGE_ADDED);
                filter.addDataScheme("package");
                registerReceiver(mInstallReceiver, filter);

                Intent i = new Intent(Intent.ACTION_VIEW);
                i.setDataAndType(Uri.fromFile(new File(apkPath)),
                                "application/vnd.android.package-archive");
                startActivity(i);