Kontaktdaten auslesen und in Datei schreiben

1package com.example.anotherproject;
2
3import android.app.Activity;
4import android.database.Cursor;
5import android.os.Bundle;
6import android.provider.BaseColumns;
7import android.provider.ContactsContract;
8import android.view.Menu;
9import java.io.*;
10
11
12public class MainActivity extends Activity {
13
14 FileWriter writer;
15
16 File file = new File("WriteTest.txt");
17
18 @Override
19 public void onCreate(Bundle savedInstanceState) {
20 super.onCreate(savedInstanceState);
21 setContentView(R.layout.activity_main);
22
23 try {
24 // Neues File anlegen
25 writer = new FileWriter(file);
26
27 System.out.println("File angelegt");
28
29 // Text in Stream schreiben
30 writer.write("Hallo Wie gehts?");
31
32 System.out.println("In Stream geschrieben");
33
34 // Stream in Datei schreiben
35 writer.flush();
36
37 System.out.println("In Datei geschrieben");
38
39 // Stream schließen
40 writer.close();
41 }
42
43 catch (IOException e) {
44 e.printStackTrace();
45 }
46
47
48 Cursor cursor = getContentResolver().query(
49 ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
50 if (cursor.getCount() > 0)
51 {
52 while (cursor.moveToNext())
53 {
54 String id = cursor.getString(cursor.getColumnIndex(BaseColumns._ID));
55 String name = cursor.getString(cursor.getColumnIndex(
56 ContactsContract.Contacts.DISPLAY_NAME));
57
58 System.out.println("Current contact on this iteration is : " + name + " with ID " + id);
59
60
61 }
62 }
63cursor.close();
64
65}
66
67 @Override
68 public boolean onCreateOptionsMenu(Menu menu) {
69 getMenuInflater().inflate(R.menu.activity_main, menu);
70 return true;
71 }
72}