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// Intent go = new Intent(getApplicationContext(),MainActivity_tag.class);
// startActivity(go);
}
});

}

}
}
*******************************MainActivity_tag***********************package
kr.icehs.intec.emart;

import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.provider.Settings;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.AlertDialog;
import android.view.View;

public class MainActivity_popup extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_popup);

ActionBar actionBar = getSupportActionBar();
actionBar.setBackgroundDrawable(new ColorDrawable(0xFFFC961E));

AlertDialog.Builder ad = new AlertDialog.Builder(this);
ad.setMessage("NFC 를 켜주세요.");
ad.setNegativeButton(" 닫기",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// 이 창 종료
MainActivity_popup.this.finish();
Intent intent = new Intent(getApplicationContext(),MainActivity_tag.class);
startActivity(intent);
}
});
ad.setPositiveButton(" 설정",
new DialogInterface.OnClickListener() {

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