通讯录

获取手机联系人的方法：

public static List<ConInfo>  getCon(Context context){
ContentResolver resolver = context.getContentResolver();
// 获取手机联系人
Cursor phoneCursor = resolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null, null, null, null);
List<ConInfo> list = new ArrayList<ConInfo>();
if (phoneCursor != null) {
while (phoneCursor.moveToNext()){
String name = phoneCursor.getString(phoneCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String num = phoneCursor.getString(phoneCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
ConInfo conInfo = new ConInfo(name,num);
list.add(conInfo);
}
}
return list;
}

其中ConInfo是一个封装联系人信息的类

private String name;
private String num;
ConInfo(String name,String num){
setName(name);
setNum(num);
}

ListView中的设置：

public View getView(int i, View view, ViewGroup viewGroup) {
//优化：减少view的加载，避免卡顿情况
Viewholder hold = new Viewholder();
if(view == null){
view = View.inflate(getApplicationContext(),R.layout.contact,null);
hold.name = (TextView) view.findViewById(R.id.name);
hold.num = (TextView) view.findViewById(R.id.num);
hold.name.setText(lists.get(i).getName());
hold.num.setText(lists.get(i).getNum());
view.setTag(hold);}else {
hold = (Viewholder) view.getTag();
hold.name.setText(lists.get(i).getName());
hold.num.setText(lists.get(i).getNum());
}
return view;
}

其中使用了Viewholder进行了一点优化，减少了view的价值，避免卡顿现象

private static class Viewholder {
TextView name;
TextView num;
}

之后可以改成一个完整的通讯录，可以打电话、存多个电话，加入照片