如何从手机获取联系人并在Android中单击按钮时显示在列表视图中？

debugcn 发表于 Dev

用户名

我想从电话中获取所有联系人并仅显示在android中ListView，而无需存储在数据库中，目的是当用户单击“同步所有联系人”按钮时，应提取所有联系人并显示在中ListView。这是主要的活动课程代码

public class MainActivity extends AppCompatActivity {

ListView listView;
Button sync;



ArrayList<newlist> listitem;

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

    listitem = new ArrayList<newlist>();
    listView = (ListView) findViewById(R.id.listViewID);
    registerForContextMenu(listView);

    sync= (Button) findViewById(R.id.syncID);
    sync.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

              //what method will be used here for sync contacts and display in listview
           }
       });
   }
}

这是Contats_list类

      public class Contact_list {
private String name;
private String phone;

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getPhone() {
    return phone;
}

public void setPhone(String phone) {
    this.phone = phone;
}

public Contact_list(String name, String phone) {
    this.name = name;
    this.phone = phone;
 }

}

这是Custom_adapter类

public class Custom_adapter extends ArrayAdapter<Contact_list> {


private final LayoutInflater inflater;
private final Context context;
private ViewHolder holder;
private final ArrayList<Contact_list> persons;


//ArrayList<Contact_list> mylist;

public Custom_adapter(Context context, ArrayList<Contact_list> persons) {
    super(context,0, persons);
    this.context = context;
    this.persons = persons;
    inflater = LayoutInflater.from(context);
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    return persons.size();
}

@Override
public Contact_list getItem(int position) {
    return persons.get(position);
}

@Override
public long getItemId(int position) {
    return persons.get(position).hashCode();
}


@Override
public View getView(int position, View convertView, ViewGroup p) {

    if (convertView == null) {


        convertView = inflater.inflate(R.layout.custom_adapter, null);

        holder = new ViewHolder();
        holder. name = (TextView) convertView.findViewById(R.id.txt_name);
        holder. phone = (TextView) convertView.findViewById(R.id.txt_phone);
        convertView.setTag(holder);
    }else{
        //Get viewholder we already created
        holder = (ViewHolder)convertView.getTag();
    }
    Contact_list person = persons.get(position);
    if(person != null){


        holder.name.setText(person.getName());
       holder.phone.setText(person.getPhone());

    }
    return convertView;
}

private static class ViewHolder {
 TextView name;
 TextView phone;


 }
}

请告诉我如何获取联系人并在列表视图中显示我是新来的，任何帮助将不胜感激。

Santosh Kumar

在清单中添加权限

<uses-permission android:name="android.permission.READ_CONTACTS" />

取两个变量

String name, phonenumber ;

你点击这里

 sync.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
      GetContactsIntoArrayList();            
               }
           });

您可以像这样访问联系人。

 public void GetContactsIntoArrayList(){

            cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null, null, null);

            while (cursor.moveToNext()) {

                name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));

                phonenumber = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

                StoreContacts.add(name + " "  + ":" + " " + phonenumber);
            }

            cursor.close();

        }

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