Android App-Entwicklung / SHA-512 Hashgenerierung

1package Geraeteid.auslesen;
2
3import java.security.MessageDigest;
4
5import android.app.Activity;
6import android.os.Bundle;
7import android.view.View;
8import android.view.View.OnClickListener;
9import android.widget.Button;
10import android.widget.TextView;
11
12
13public class GeraeteidActivity extends Activity
14implements OnClickListener{
15 /** Called when the activity is first created. */
16
17
18 private Button Geraete_ID;
19
20 @Override
21 public void onCreate(Bundle savedInstanceState) {
22 super.onCreate(savedInstanceState);
23 setContentView(R.layout.main);
24
25 Geraete_ID = (Button)findViewById(R.id.button1);
26 Geraete_ID.setOnClickListener(this);
27 }
28
29 public void onClick(View v)
30 {
31 final String androidId;
32 androidId = " " + android.provider.Settings.Secure.getString(getContentResolver(), android.provider.Settings.Secure.ANDROID_ID);
33
34 TextView tvid = new TextView(this);
35 tvid.setText("ID: " + androidId);
36 setContentView(tvid);
37
38 MessageDigest digester = MessageDigest.getInstance("SHA-512");
39 byte[] bytes = new byte[8192];
40 int byteCount;
41 while ((byteCount = in.read(bytes)) > 0) {
42 digester.update(bytes, 0, byteCount);
43 }
44 byte[] digest = digester.digest();
45
46
47 }
48
49}

1FileInputStream in = new FileInputStream()