我正在Android活动中工作，我必须从ListView中选择联系人并在。csv文件中写入他们的号码。
然而，我设法写所有的联系人号码从联系人按一下按钮。但是现在我想从ListView中选择联系人，然后点击按钮，只有选中的联系人应该写入文件。
我提供我的代码，请告诉我如何才能实现这一点?
upload_contacts.java:
public class Upload_Contacts extends ListActivity {
private String[] arraySpinner;
Spinner spin ;
String adi;
ToggleButton rdb;
private Cursor cursor;
private boolean csv_status = false;
Button btn;
public String[] Contacts = {};
public int[] to = {};
public ListView myListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.p_contacts);
btn=(Button)findViewById(R.id.btvc);
rdb=(ToggleButton)findViewById(R.id.rdb);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
createCSV();// here I can write all contacts to file. I want only selected contacts to write, and also if all contacts selected they should also be written in file////
String selected = "";
int cntChoice = myListView.getCount();
SparseBooleanArray sparseBooleanArray = myListView.getCheckedItemPositions();
for(int i = 0; i < cntChoice; i++){
if(sparseBooleanArray.get(i)) {
selected += myListView.getItemAtPosition(i).toString() + "n";
}
}
Toast.makeText(Upload_Contacts.this,
selected, //android.content.ContentResolver $CursorWrapperInner@635D555
// here i want to show number against the contact selected .
Toast.LENGTH_LONG).show();
}
});
Cursor mCursor = getContacts();
startManagingCursor(mCursor);
// here showing contacts in listview with check box..
ListAdapter adapter2 = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_multiple_choice, mCursor,
Contacts = new String[] {ContactsContract.Contacts.DISPLAY_NAME },
to = new int[] { android.R.id.text1 });
setListAdapter(adapter2);
myListView = getListView();
myListView.setItemsCanFocus(false);
myListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
// here I checked all the contacts in list view
rdb.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Toast.makeText(InCallScreen.this, "selected all", Toast.LENGTH_SHORT).show();
if(rdb.isChecked()){
rdb.setBackgroundColor(Color.parseColor("#FBE039"));
rdb.setTextColor(Color.parseColor("#000000"));
for (int i = 0; i < myListView.getCount(); i++)
myListView.setItemChecked(i, true);
}
else{
rdb.setBackgroundColor(Color.parseColor("#333333"));
rdb.setTextColor(Color.parseColor("#ffffff"));
for (int i = 0; i < myListView.getCount(); i++)
myListView.setItemChecked(i, false);
}
}
});
}
// here showing contacts name in listview..
private Cursor getContacts() {
// Run query
Uri uri = ContactsContract.Contacts.CONTENT_URI;
String[] projection = new String[] { ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME};
String selection = ContactsContract.Contacts.HAS_PHONE_NUMBER + " = '"
+ ("1") + "'";
String[] selectionArgs = null;
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME
+ " COLLATE LOCALIZED ASC";
return managedQuery(uri, projection, selection, selectionArgs,
sortOrder);
}
private void createCSV() {
CSVWriter writer = null;
try {
writer = new CSVWriter(new FileWriter(Environment.getExternalStorageDirectory().getAbsolutePath() + "/my_test_contact.csv"));
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String displayName;
String number;
long _id;
String columns[] = new String[]{ ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME };
writer.writeColumnNames(); // Write column header
Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,
columns,
null,
null,
ContactsContract.Data.DISPLAY_NAME + " COLLATE LOCALIZED ASC");
startManagingCursor(cursor);
if(cursor.moveToFirst()) {
do {
_id = Long.parseLong(cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID)));
//displayName = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)).trim();
number = getPrimaryNumber(_id);
// Log.d("numbers", number+" ");
writer.writeNext((/*displayName + */ "/" + number).split("/"));
} while(cursor.moveToNext());
csv_status = true;
} else {
csv_status = false;
}
try {
if(writer != null)
writer.close();
} catch (IOException e) {
Log.w("Test", e.toString());
}
}// Method close.
private void exportCSV() {
if(csv_status == true) {
//CSV file is created so we need to Export that ...
final File CSVFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/my_test_contact.csv");
//Log.i("SEND EMAIL TESTING", "Email sending");
Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
emailIntent.setType("text/csv");
emailIntent .putExtra(android.content.Intent.EXTRA_SUBJECT, "Test contacts ");
emailIntent .putExtra(android.content.Intent.EXTRA_TEXT, "nnAdroid developern Adnan");
emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + CSVFile.getAbsolutePath()));
emailIntent.setType("message/rfc822"); // Shows all application that supports SEND activity
try {
startActivity(Intent.createChooser(emailIntent, "Send mail..."));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(getApplicationContext(), "Email client : " + ex.toString(), Toast.LENGTH_SHORT);
}
} else {
Toast.makeText(getApplicationContext(), "Information not available to create CSV.", Toast.LENGTH_SHORT).show();
}
}
/**
* Get primary Number of requested id.
*
* @return string value of primary number.
*/
private String getPrimaryNumber(long _id) {
String primaryNumber = null;
try {
Cursor cursor = getContentResolver().query( ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
new String[]{Phone.NUMBER, Phone.TYPE},
ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = "+ _id, // We need to add more selection for phone type
null,
null);
if(cursor != null) {
while(cursor.moveToNext()){
switch(cursor.getInt(cursor.getColumnIndex(Phone.TYPE))){
case Phone.TYPE_MOBILE :
primaryNumber = cursor.getString(cursor.getColumnIndex(Phone.NUMBER));
break;
case Phone.TYPE_HOME :
primaryNumber = cursor.getString(cursor.getColumnIndex(Phone.NUMBER));
break;
case Phone.TYPE_WORK :
primaryNumber = cursor.getString(cursor.getColumnIndex(Phone.NUMBER));
break;
default:
primaryNumber = cursor.getString(cursor.getColumnIndex(Phone.NUMBER));
}
if(primaryNumber != null)
break;
}
}
} catch (Exception e) {
Log.i("test", "Exception " + e.toString());
} finally {
if(cursor != null) {
cursor.deactivate();
cursor.close();
}
}
return primaryNumber;
}
}
我应该在create.csv方法中做些什么，这样我就可以从listview中获得选定的联系人，并只将他们的号码写入。csv文件?
编辑:
我已经解决了这个问题。
这里使用自定义适配器来完成任务。现在活动有一个电话联系人列表，您可以从复选框中选择联系人并将其号码写入.csv文件中。这里是csv writer类:
CSVwriter.java:
public class CSVWriter {
private PrintWriter pw;
private char separator;
private char quotechar;
private char escapechar;
private String lineEnd;
/** The character used for escaping quotes. */
public static final char DEFAULT_ESCAPE_CHARACTER = 'u0000';
/** The default separator to use if none is supplied to the constructor. */
public static final char DEFAULT_SEPARATOR = 'n';
/**
* The default quote character to use if none is supplied to the
* constructor.
*/
public static final char DEFAULT_QUOTE_CHARACTER = 'u0000';
/** The quote constant to use when you wish to suppress all quoting. */
public static final char NO_QUOTE_CHARACTER = 'u0000';
/** The escape constant to use when you wish to suppress all escaping. */
public static final char NO_ESCAPE_CHARACTER = 'u0000';
/** Default line terminator uses platform encoding. */
public static final String DEFAULT_LINE_END = "n";
/** Default column name. */
public static final String DEFAULT_COLUMN_NAME = "Phone Number";
/**
* Constructs CSVWriter using a comma for the separator.
*
* @param writer
* the writer to an underlying CSV source.
*/
public CSVWriter(Writer writer) {
this(writer, DEFAULT_SEPARATOR, DEFAULT_QUOTE_CHARACTER,
DEFAULT_ESCAPE_CHARACTER, DEFAULT_LINE_END);
}
/**
* Constructs CSVWriter with supplied separator, quote char, escape char and line ending.
*
* @param writer
* the writer to an underlying CSV source.
* @param separator
* the delimiter to use for separating entries
* @param quotechar
* the character to use for quoted elements
* @param escapechar
* the character to use for escaping quotechars or escapechars
* @param lineEnd
* the line feed terminator to use
*/
public CSVWriter(Writer writer, char separator, char quotechar, char escapechar, String lineEnd) {
this.pw = new PrintWriter(writer);
this.separator = separator;
this.quotechar = quotechar;
this.escapechar = escapechar;
this.lineEnd = lineEnd;
}
/**
* Writes the next line to the file.
*
* @param nextLine
* a string array with each comma-separated element as a separate
* entry.
*/
public void writeNext(String[] nextLine) {
if (nextLine == null)
return;
StringBuffer sb = new StringBuffer();
for (int i = 0; i < nextLine.length; i++) {
if (i != 0) {
sb.append(separator);
}
String nextElement = nextLine[i];
if (nextElement == null)
continue;
if (quotechar != NO_QUOTE_CHARACTER)
sb.append(quotechar);
for (int j = 0; j < nextElement.length(); j++) {
char nextChar = nextElement.charAt(j);
if (escapechar != NO_ESCAPE_CHARACTER && nextChar == quotechar) {
sb.append(escapechar).append(nextChar);
} else if (escapechar != NO_ESCAPE_CHARACTER && nextChar == escapechar) {
sb.append(escapechar).append(nextChar);
} else {
sb.append(nextChar);
}
}
if (quotechar != NO_QUOTE_CHARACTER)
sb.append(quotechar);
}
sb.append(lineEnd);
pw.write(sb.toString());
}
public void writeColumnNames() {
writeNext(DEFAULT_COLUMN_NAME.split(","));
}
/**
* Flush underlying stream to writer.
*
* @throws IOException if bad things happen
*/
public void flush() throws IOException {
pw.flush();
}
/**
* Close the underlying stream writer flushing any buffered content.
*
* @throws IOException if bad things happen
*
*/
public void close() throws IOException {
pw.flush();
pw.close();
}
}
这里使用了一个自定义适配器，最后它工作完美。我的下一步行动将实现检查所有复选框按钮在它。
Upload_contact.java
public class disusa extends ListActivity implements OnItemClickListener{
List<String> name1 = new ArrayList<String>();
List<String> phno1 = new ArrayList<String>();
MyAdapter ma ;
Button select;
private boolean csv_status = false;
ToggleButton rdb;
ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.disp);
getAllContacts(this.getContentResolver());
rdb=(ToggleButton)findViewById(R.id.all);
//lv= (ListView) findViewById(R.id.);
lv = getListView();
ma = new MyAdapter();
lv.setAdapter(ma);
lv.setOnItemClickListener(this);
lv.setItemsCanFocus(false);
lv.setTextFilterEnabled(true);
// adding
select = (Button) findViewById(R.id.button1);
select.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
StringBuilder checkedcontacts= new StringBuilder();
//System.out.println(".............."+ma.mCheckStates.size());
for(int i = 0; i < name1.size(); i++){
if(ma.mCheckStates.get(i)==true)
{
checkedcontacts.append(phno1.get(i).toString());
checkedcontacts.append("n");
CSVWriter writer = null;
try {
writer = new CSVWriter(new FileWriter(Environment.getExternalStorageDirectory().getAbsolutePath() + "/my_test_contact.csv"));
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
writer.writeColumnNames(); // Write column header
if(phno1!=null) {
writer.writeNext((checkedcontacts.toString().split("n")));
csv_status = true;
} else {
csv_status = false;
}
try {
if(writer != null)
writer.close();
} catch (IOException e) {
Log.w("Test", e.toString());
}
}
else
{
System.out.println("Not Checked......"+name1.get(i).toString());
}
}
Toast.makeText(disusa.this, checkedcontacts,1000).show();
}
});
rdb.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(rdb.isChecked()){
rdb.setBackgroundColor(Color.parseColor("#FBE039"));
rdb.setTextColor(Color.parseColor("#000000"));
for (int i = 0; i < lv.getChildCount(); i++)
getListView().setItemChecked(i, true);
Toast.makeText(disusa.this, "adios",1000).show();
}
else{
rdb.setBackgroundColor(Color.parseColor("#333333"));
rdb.setTextColor(Color.parseColor("#ffffff"));
for (int i = 0; i < lv.getCount(); i++)
getListView().setItemChecked(i, false);
Toast.makeText(disusa.this,"soida",1000).show();
}
}
});
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
ma.toggle(arg2);
}
public void getAllContacts(ContentResolver cr) {
Cursor phones = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null,null, null);
while (phones.moveToNext())
{
String name=phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
// System.out.println(".................."+phoneNumber);
name1.add(name);
phno1.add(phoneNumber);
}
phones.close();
}
class MyAdapter extends BaseAdapter implements CompoundButton.OnCheckedChangeListener
{ private SparseBooleanArray mCheckStates;
LayoutInflater mInflater;
TextView tv1,tv;
CheckBox cb;
MyAdapter()
{
mCheckStates = new SparseBooleanArray(name1.size());
mInflater = (LayoutInflater)disusa.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return name1.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi=convertView;
if(convertView==null)
vi = mInflater.inflate(R.layout.row, null);
TextView tv= (TextView) vi.findViewById(R.id.contact_name);
tv1= (TextView) vi.findViewById(R.id.phone_number);
cb = (CheckBox) vi.findViewById(R.id.checkBox_id);
tv.setText("Name :"+ name1.get(position));
tv1.setText("Phone No :"+ phno1.get(position));
cb.setTag(position);
cb.setChecked(mCheckStates.get(position, false));
cb.setOnCheckedChangeListener(this);
return vi;
}
public boolean isChecked(int position) {
return mCheckStates.get(position, false);
}
public void setChecked(int position, boolean isChecked) {
mCheckStates.put(position, isChecked);
System.out.println("hello...........");
notifyDataSetChanged();
}
public void toggle(int position) {
setChecked(position, !isChecked(position));
}
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
mCheckStates.put((Integer) buttonView.getTag(), isChecked);
}
public View getView2(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
return null;
}
}
}
reference = "在自定义列表视图中显示联系人号码和姓名"