如何读取手机中的所有联系人，包括Google联系人，存入数组列表？

huangapple
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英文:

How to read all contacts in phone, including google contacts, into an array list?

问题

  1. 我尝试过这个，在这里它只读取了4个联系人，但没有读取所有联系人。
  3. 无法启动活动，出现以下问题：
  5.     ComponentInfo{com.developer.sparty/com.developer.sparty.DashboardActivity}: java.lang.NullPointerException: println 需要一条消息
  6.             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3632)
  7.             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3784)
  8.             at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
  9.             at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
  10.             at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
  11.             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2270)
  13. 我的 `DashboardActivity` 代码如下：
  15.     public class DashboardActivity extends AppCompatActivity {
  16.     ActionBar actionBar;
  17.     ArrayList<CONTACTS_DATA> listOfContacts;
  18.     public static final int REQUEST_READ_CONTACTS = 79;
  19.     @Override
  20.     protected void onCreate(Bundle savedInstanceState) {
  21.         super.onCreate(savedInstanceState);
  22.         setContentView(R.layout.activity_dashboard);
  23.         actionBar = getSupportActionBar();
  24.         actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#0582CA")));
  25.         //on start default
  26.         actionBar.setTitle(" " + "Chats");
  27.         actionBar.setDisplayShowHomeEnabled(true);
  28.         actionBar.setLogo(R.drawable.logo);
  29.         actionBar.setDisplayUseLogoEnabled(true);
  30.         actionBar.show();
  31.         listOfContacts = new ArrayList<>();
  32.         if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.READ_CONTACTS)
  33.                 == PackageManager.PERMISSION_GRANTED) {
  34.            ReadContactsAndShowUsers();
  35.         } else {
  36.             ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.READ_CONTACTS},
  37.                     REQUEST_READ_CONTACTS);
  38.         }
  39.     }
  41.     public class CONTACTS_DATA {
  42.         public String contact_data_name;
  43.         public String contact_data_phoneNo;
  44.     }
  46.     @Override
  47.     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
  48.         switch (requestCode) {
  49.             case REQUEST_READ_CONTACTS: {
  50.                 if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
  51.                   ReadContactsAndShowUsers();
  52.                 } else {
  53.                     Toast.makeText(this, "需要权限", Toast.LENGTH_SHORT).show();
  54.                 }
  55.                 return;
  56.             }
  57.         }
  58.     }
  60.     private void ReadContactsAndShowUsers() {
  61.         ContentResolver cr = getContentResolver();
  62.         Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
  63.                 null, null, null, null);
  64.         if ((cur!=null?cur.getCount():0) > 0) {
  65.             while (cur!=null && cur.moveToNext()) {
  66.                 CONTACTS_DATA contacts_data=new CONTACTS_DATA();
  67.                 String id = cur.getString(
  68.                         cur.getColumnIndex(ContactsContract.Contacts._ID));
  69.                 String name = cur.getString(cur.getColumnIndex(
  70.                         ContactsContract.Contacts.DISPLAY_NAME));
  71.                 contacts_data.contact_data_name=name;
  72.                 if (cur.getInt(cur.getColumnIndex( ContactsContract.Contacts.HAS_PHONE_NUMBER)) > 0) {
  73.                     Cursor pCur = cr.query(
  74.                             ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
  75.                             null,
  76.                             ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
  77.                             new String[]{id}, null);
  78.                     while (pCur.moveToNext()) {
  79.                         String phoneNo = pCur.getString(pCur.getColumnIndex(
  80.                                 ContactsContract.CommonDataKinds.Phone.NUMBER));
  81.                         contacts_data.contact_data_phoneNo=phoneNo;
  82.                     }
  83.                     pCur.close();
  84.                 }
  85.                 listOfContacts.add(contacts_data);
  86.             }
  87.         }
  88.         if (cur!=null) {
  89.             cur.close();
  90.         }
  91.         for (int i = 0; i < listOfContacts.size(); i++) {
  92.             Log.d("联系人", listOfContacts.get(i).contact_data_phoneNo);
  93.             Log.d("联系人", listOfContacts.get(i).contact_data_name);
  94.         }
  95.     }
  97.     }
英文:

I have tried this where it reads only 4 contacts but does not read all the contacts?

Unable to start activity and getting the below issue:

  1. ComponentInfo{com.developer.sparty/com.developer.sparty.DashboardActivity}: java.lang.NullPointerException: println needs a message
  2. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3632)
  3. at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3784)
  4. at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
  5. at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
  6. at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
  7. at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2270)

My DashboardActivity code is

  1. public class DashboardActivity extends AppCompatActivity {
  2. ActionBar actionBar;
  3. ArrayList&lt;CONTACTS_DATA&gt; listOfContacts;
  4. public static final int REQUEST_READ_CONTACTS = 79;
  5. @Override
  6. protected void onCreate(Bundle savedInstanceState) {
  7. super.onCreate(savedInstanceState);
  8. setContentView(R.layout.activity_dashboard);
  9. actionBar = getSupportActionBar();
  10. actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor(&quot;#0582CA&quot;)));
  11. //on start default
  12. actionBar.setTitle(&quot; &quot; + &quot;Chats&quot;);
  13. actionBar.setDisplayShowHomeEnabled(true);
  14. actionBar.setLogo(R.drawable.logo);
  15. actionBar.setDisplayUseLogoEnabled(true);
  16. actionBar.show();
  17. listOfContacts = new ArrayList&lt;&gt;();
  18. if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.READ_CONTACTS)
  19. == PackageManager.PERMISSION_GRANTED) {
  20. ReadContactsAndShowUsers();
  21. } else {
  22. ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.READ_CONTACTS},
  23. REQUEST_READ_CONTACTS);
  24. }
  25. }
  26. public class CONTACTS_DATA {
  27. public String contact_data_name;
  28. public String contact_data_phoneNo;
  29. }
  30. @Override
  31. public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
  32. switch (requestCode) {
  33. case REQUEST_READ_CONTACTS: {
  34. if (grantResults.length &gt; 0 &amp;&amp; grantResults[0] == PackageManager.PERMISSION_GRANTED) {
  35. ReadContactsAndShowUsers();
  36. } else {
  37. Toast.makeText(this, &quot;Permission is required&quot;, Toast.LENGTH_SHORT).show();
  38. }
  39. return;
  40. }
  41. }
  42. }
  43. private void ReadContactsAndShowUsers() {
  44. ContentResolver cr = getContentResolver();
  45. Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
  46. null, null, null, null);
  47. if ((cur!=null?cur.getCount():0)&gt;0) {
  48. while (cur!=null&amp;&amp;cur.moveToNext()) {
  49. CONTACTS_DATA contacts_data=new CONTACTS_DATA();
  50. String id = cur.getString(
  51. cur.getColumnIndex(ContactsContract.Contacts._ID));
  52. String name = cur.getString(cur.getColumnIndex(
  53. ContactsContract.Contacts.DISPLAY_NAME));
  54. contacts_data.contact_data_name=name;
  55. if (cur.getInt(cur.getColumnIndex( ContactsContract.Contacts.HAS_PHONE_NUMBER)) &gt; 0) {
  56. Cursor pCur = cr.query(
  57. ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
  58. null,
  59. ContactsContract.CommonDataKinds.Phone.CONTACT_ID + &quot; = ?&quot;,
  60. new String[]{id}, null);
  61. while (pCur.moveToNext()) {
  62. String phoneNo = pCur.getString(pCur.getColumnIndex(
  63. ContactsContract.CommonDataKinds.Phone.NUMBER));
  64. contacts_data.contact_data_phoneNo=phoneNo;
  65. }
  66. pCur.close();
  67. }
  68. listOfContacts.add(contacts_data);
  69. }
  70. }
  71. if (cur!=null) {
  72. cur.close();
  73. }
  74. for (int i = 0; i &lt; listOfContacts.size(); i++) {
  75. Log.d(&quot;CONTACT&quot;, listOfContacts.get(i).contact_data_phoneNo);
  76. Log.d(&quot;CONTACT&quot;, listOfContacts.get(i).contact_data_name);
  77. }
  78. }
  79. }

答案1

得分: 0

将这些代码行放在try-catch块中，因为有一些联系人没有与其关联的电话号码，所以可能会出现null值导致崩溃。

  1. for (int i = 0; i < listOfContacts.size(); i++) {
  2.     try{
  3.         Log.d("CONTACT", listOfContacts.get(i).contact_data_phoneNo);
  4.     } catch(Exception e){
  5.         e.printStackTrace();
  6.     }
  7.     try{
  8.         Log.d("CONTACT", listOfContacts.get(i).contact_data_name);
  9.     } catch(Exception e){
  10.         e.printStackTrace();
  11.     }
  12. }
英文:

Put these lines in try catch because there are few contacts which do not have phone number associated with them so, you are getting null and crash.

  1. for (int i = 0; i &lt; listOfContacts.size(); i++) {
  2. try{
  3. Log.d(&quot;CONTACT&quot;, listOfContacts.get(i).contact_data_phoneNo);
  4. } catch(Exception e){
  5. e.printStackTrace();
  6. }
  7. try{
  8. Log.d(&quot;CONTACT&quot;, listOfContacts.get(i).contact_data_name);
  9. } catch(Exception e){
  10. e.printStackTrace();
  11. }
  12. }

huangapple
  • 本文由 发表于 2020年8月13日 13:23:34
  • 转载请务必保留本文链接：https://go.coder-hub.com/63388606.html
  • android
  • android-contacts
  • android-permissions
  • android-studio
  • java
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