我有一个代码可以从内置电话联系人中读取联系人，它会在我的应用程序的列表视图中显示所有联系人。用户可以选择多个联系人并将它们显示在另一个活动中。此代码在 Android API 级别 18 及更高版本中运行良好，但在 API 18 以下版本中出现错误。
我附上了联系人选择器活动及其适配器的代码。
private void getSelectedContacts() {
// TODO Auto-generated method stub
StringBuffer sb = new StringBuffer();
dataBase=mHelper.getWritableDatabase();
ContentValues values=new ContentValues();
for (ContactObject bean : ContactsListClass.phoneList) {
if (bean.isSelected()) {
sb.append(bean.getName());
sb.append(bean.getNumber());
sb.append("1");
values.put(DbHelper.KEY_FNAME,bean.getName());
values.put(DbHelper.KEY_LNAME,bean.getNumber() );
values.put(DbHelper.KEY_INVITE,"1" );
dataBase.insert(DbHelper.TABLE_NAME, null, values);
}
}
dataBase.close();
String s = sb.toString().trim();
if (TextUtils.isEmpty(s)) {
Toast.makeText(context, "Select atleast one Contact",
Toast.LENGTH_SHORT).show();
} else {
s = s.substring(0, s.length() - 1);
/**
Toast.makeText(context, "Selected Contacts : " + s,
Toast.LENGTH_SHORT).show();
**/
Intent i = new Intent(Contacts_main.this, MainActivity.class);
i.putExtra("NAME", name);
i.putExtra("EVT_Name", event_name);
i.putExtra("EVT_Date", event_date);
startActivity(i);
}
}
private void addContactsInList() {
// TODO Auto-generated method stub
Thread thread = new Thread() {
@Override
public void run() {
showPB();
try {
Cursor phones = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null, null, null, null);
try {
ContactsListClass.phoneList.clear();
} catch (Exception e) {
}
while (phones.moveToNext()) {
String phoneName = phones
.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones
.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
String phoneImage = phones
.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID));
//String pImage =
ContactObject cp = new ContactObject();
cp.setName(phoneName);
cp.setNumber(phoneNumber);
cp.setImage(phoneImage);
//cp.setImage(getResources(R.drawable.prof_active));
ContactsListClass.phoneList.add(cp);
}
phones.close();
lv = new ListView(context);
lv.setDividerHeight(0);
lv.setDivider(null);
lv.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT));
runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
llContainer.addView(lv);
}
});
Collections.sort(ContactsListClass.phoneList,
new Comparator<ContactObject>() {
@Override
public int compare(ContactObject lhs,
ContactObject rhs) {
return lhs.getName().compareTo(
rhs.getName());
}
});
objAdapter = new ContactsAdapter(Contacts_main.this,
ContactsListClass.phoneList);
lv.setAdapter(objAdapter); //ERROR SHOWING HERE
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent,
View view, int position, long id) {
CheckBox chk = (CheckBox) view
.findViewById(R.id.contactcheck);
ContactObject bean = ContactsListClass.phoneList
.get(position);
if (bean.isSelected()) {
bean.setSelected(false);
chk.setChecked(false);
} else {
bean.setSelected(true);
chk.setChecked(true);
}
}
});
} catch (Exception e) {
// e.printStackTrace();
//Toast.makeText(context, "Crash",Toast.LENGTH_SHORT).show();
}
hidePB();
}
};
thread.start();
}
适配器类：
Context mContext;
LayoutInflater inflater;
private List<ContactObject> mainDataList = null;
private List<ContactObject> mainInviteesList = null;
private ArrayList<ContactObject> arraylist;
private DbHelper mHelper;
private SQLiteDatabase dataBase;
public ContactsAdapter(Context context, List<ContactObject> mainDataList) {
mContext = context;
this.mainDataList = mainDataList;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<ContactObject>();
this.arraylist.addAll(mainDataList);
mHelper=new DbHelper(context);
}
static class ViewHolder {
protected TextView name;
protected TextView number;
protected CheckBox check;
protected ImageView image;
protected EditText invitees;
}
@Override
public int getCount() {
return mainDataList.size();
}
@Override
public ContactObject getItem(int position) {
return mainDataList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.list_row, null);
holder.name = (TextView) view.findViewById(R.id.contactname);
holder.number = (TextView) view.findViewById(R.id.contactno);
holder.check = (CheckBox) view.findViewById(R.id.contactcheck);
holder.image = (ImageView) view.findViewById(R.id.contactimage);
holder.invitees = (EditText) view.findViewById(R.id.editInvites);
view.setTag(holder);
view.setTag(R.id.contactname, holder.name);
view.setTag(R.id.contactno, holder.number);
view.setTag(R.id.contactcheck, holder.check);
view.setTag(R.id.editInvites, holder.invitees);
holder.check
.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton vw,
boolean isChecked) {
int getPosition = (Integer) vw.getTag();
mainDataList.get(getPosition).setSelected(
vw.isChecked());
/**
dataBase=mHelper.getWritableDatabase();
ContentValues values=new ContentValues();
values.put(DbHelper.KEY_FNAME,mainDataList.get(getPosition).getName());
values.put(DbHelper.KEY_LNAME,mainDataList.get(getPosition).getNumber());
values.put(DbHelper.KEY_INVITE,"1" );
dataBase.insert(DbHelper.TABLE_NAME, null, values);
dataBase.close();
**/
}
});
// holder.invitees.addTextChangedListener(watcher);
} else {
holder = (ViewHolder) view.getTag();
}
holder.check.setTag(position);
//holder.invitees.setTag(position);
holder.name.setText(mainDataList.get(position).getName());
holder.number.setText(mainDataList.get(position).getNumber());
if(getByteContactPhoto(mainDataList.get(position).getImage())==null){
holder.image.setImageResource(R.drawable.prof_active);
}else{
holder.image.setImageBitmap(getByteContactPhoto(mainDataList.get(position).getImage()));
}
holder.check.setChecked(mainDataList.get(position).isSelected());
return view;
}
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
mainDataList.clear();
if (charText.length() == 0) {
mainDataList.addAll(arraylist);
} else {
for (ContactObject wp : arraylist) {
if (wp.getName().toLowerCase(Locale.getDefault())
.contains(charText)) {
mainDataList.add(wp);
}
}
}
notifyDataSetChanged();
}
public Bitmap getByteContactPhoto(String contactId) {
Uri contactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, Long.parseLong(contactId));
Uri photoUri = Uri.withAppendedPath(contactUri, Contacts.Photo.CONTENT_DIRECTORY);
Cursor cursor = mContext.getContentResolver().query(photoUri,
new String[] {Contacts.Photo.DATA15}, null, null, null);
if (cursor == null) {
return null;
}
try {
if (cursor.moveToFirst()) {
byte[] data = cursor.getBlob(0);
if (data != null) {
return BitmapFactory.decodeStream( new ByteArrayInputStream(data));
}
}
} finally {
cursor.close();
}
return null;
}
}