在我的Android应用程序中我试图从我的电话簿获取联系人列表有1000个联系人应用程序花了很多时间来加载联系人而且它崩溃这里是我的代码当联系人加载它没有响应应用程序是崩溃
private ArrayList<AllInOnetItem> getContacts() {
String phoneNo = "";
ArrayList<AllInOnetItem> contacts = new ArrayList<>();
ContentResolver cr = getActivity().getContentResolver();
//ContentResolver cResolver=context.getContextResolver();
ContentProviderClient mCProviderClient = cr.acquireContentProviderClient(ContactsContract.Contacts.CONTENT_URI);
Cursor cur = null;
try {
cur = mCProviderClient.query(ContactsContract.Contacts.CONTENT_URI,
null, null, null, null);
} catch (RemoteException e) {
e.printStackTrace();
}
if ((cur != null ? cur.getCount() : 0) > 0) {
while (cur != null && cur.moveToNext()) {
String id = cur.getString(
cur.getColumnIndex(ContactsContract.Contacts._ID));
String name = cur.getString(cur.getColumnIndex(
ContactsContract.Contacts.DISPLAY_NAME));
if (cur.getInt(cur.getColumnIndex(
ContactsContract.Contacts.HAS_PHONE_NUMBER)) > 0) {
Cursor pCur = cr.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
new String[]{id}, null);
while (pCur.moveToNext()) {
phoneNo = pCur.getString(pCur.getColumnIndex(
ContactsContract.CommonDataKinds.Phone.NUMBER));
Log.i(TAG, "Name: " + name);
Log.i(TAG, "Phone Number: " + phoneNo);
}
pCur.close();
}
contacts.add(new AllInOnetItem(name, phoneNo));
}
sortlist(contacts);
if (contactAdapter != null) {
contactAdapter.notifyDataSetChanged();
}
}
if (cur != null) {
cur.close();
}
return contacts;
}
试试以下代码：
List<ContactVO> contactVOList = new ArrayList();
private void getContacts() {
AsyncTaskRunner runner = new AsyncTaskRunner();
runner.execute();
}
private class AsyncTaskRunner extends AsyncTask<String, String, String> {
private String resp;
ProgressDialog progressDialog;
@Override
protected String doInBackground(String... params) {
ContactVO contactVO;
ContentResolver contentResolver = getContentResolver();
Cursor cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC");
if (cursor.getCount() > 0) {
while (cursor.moveToNext()) {
int hasPhoneNumber = Integer.parseInt(cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER)));
if (hasPhoneNumber > 0) {
String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
contactVO = new ContactVO();
contactVO.setContactName(name);
Cursor phoneCursor = contentResolver.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
new String[]{id},
null);
if (phoneCursor.moveToNext()) {
String phoneNumber = phoneCursor.getString(phoneCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
contactVO.setContactNumber(phoneNumber);
}
phoneCursor.close();
Cursor emailCursor = contentResolver.query(
ContactsContract.CommonDataKinds.Email.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = ?",
new String[]{id}, null);
while (emailCursor.moveToNext()) {
String emailId = emailCursor.getString(emailCursor.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
}
contactVOList.add(contactVO);
}
}
}
return null;
}
@Override
protected void onPostExecute(String result) {
// execution of result of Long time consuming operation
hideProgressBar();
setContactAdapter();
}
@Override
protected void onPreExecute() {
showProgressBar();
}
}
public class ContactVO {
private String ContactImage;
private String ContactName;
private String ContactNumber;
private boolean isChecked;
public String getContactImage() {
return ContactImage;
}
public void setContactImage(String contactImage) {
this.ContactImage = ContactImage;
}
public String getContactName() {
return ContactName;
}
public void setContactName(String contactName) {
ContactName = contactName;
}
public String getContactNumber() {
return ContactNumber;
}
public void setContactNumber(String contactNumber) {
ContactNumber = contactNumber;
}
public boolean isChecked() {
return isChecked;
}
public void setChecked(boolean checked) {
isChecked = checked;
}
@Override
public String toString() {
return ContactNumber.replace(" ","");
}
}
public class AllContactsAdapter extends RecyclerView.Adapter<AllContactsAdapter.ContactViewHolder> implements Filterable {
private List<ContactVO> contactVOList,contactListFiltered;
private Context mContext;
public AllContactsAdapter(List<ContactVO> contactVOList, Context mContext){
this.contactVOList = contactVOList;
this.contactListFiltered = contactVOList;
this.mContext = mContext;
}
@Override
public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.single_contact_view, null);
ContactViewHolder contactViewHolder = new ContactViewHolder(view);
return contactViewHolder;
}
@Override
public void onBindViewHolder(ContactViewHolder holder, int position) {
final ContactVO contactVO = contactListFiltered.get(position);
holder.tvContactName.setText(contactVO.getContactName());
holder.tvPhoneNumber.setText(contactVO.getContactNumber());
holder.cbContact.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
contactVO.setChecked(b);
}
});
if(contactVO.isChecked()){
holder.cbContact.setChecked(true);
}
else {
holder.cbContact.setChecked(false);
}
}
@Override
public int getItemCount() {
return contactListFiltered.size();
}
public List<ContactVO> getContacts(){
return contactVOList;
}
public List<ContactVO> getSelectedContacts(){
List<ContactVO> selectedContactVOList = new ArrayList<>();
for (int i = 0; i < contactVOList.size(); i++) {
if(contactVOList.get(i).isChecked()){
selectedContactVOList.add(contactVOList.get(i));
}
}
return selectedContactVOList;
}
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString();
if (charString.isEmpty()) {
contactListFiltered = contactVOList;
} else {
List<ContactVO> filteredList = new ArrayList<>();
for (ContactVO row : contactVOList) {
// name match condition. this might differ depending on your requirement
// here we are looking for name or phone number match
if (row.getContactName().toLowerCase().contains(charString.toLowerCase()) || row.getContactNumber().contains(charSequence)) {
filteredList.add(row);
}
}
contactListFiltered = filteredList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = contactListFiltered;
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
contactListFiltered = (ArrayList<ContactVO>) filterResults.values;
notifyDataSetChanged();
}
};
}
public static class ContactViewHolder extends RecyclerView.ViewHolder{
ImageView ivContactImage;
TextView tvContactName;
TextView tvPhoneNumber;
CheckBox cbContact;
public ContactViewHolder(View itemView) {
super(itemView);
ivContactImage = (ImageView) itemView.findViewById(R.id.ivContactImage);
tvContactName = (TextView) itemView.findViewById(R.id.tvContactName);
tvPhoneNumber = (TextView) itemView.findViewById(R.id.tvPhoneNumber);
cbContact = itemView.findViewById(R.id.cbContact);
}
}
}
private void setContactAdapter() {
contactAdapter = new AllContactsAdapter(contactVOList, getApplicationContext());
rvContacts.setLayoutManager(new LinearLayoutManager(SendSMSActivity.this));
rvContacts.setAdapter(contactAdapter);
rlContacts.setVisibility(View.VISIBLE);
}
您可以在后台线程中获取联系人。对于后台任务，您可以使用WorkManager，Firebase JobDispatcher，AsyncTask等。如果您将使用AsyncTask，那么您必须记住上下文中的内存泄漏问题。