问题
I want to export the Phone contacts to External storage area. I didn't work with this type of method. Anyone guide me to do this?
回答1:
In your code, you wrote one function but from where is this function called? And what is the meaning of get(View view) function? This function is not being called so it can be removed.
I've edited my answer as per your requirements and tested it with 500 Contacts to save a single vCard file with 500 contacts in my sd card.
package com.vcard;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import android.app.Activity;
import android.content.res.AssetFileDescriptor;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.ContactsContract;
import android.util.Log;
import android.view.View;
public class VCardActivity extends Activity
{
Cursor cursor;
ArrayList<String> vCard ;
String vfile;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
vfile = "Contacts" + "_" + System.currentTimeMillis()+".vcf";
/**This Function For Vcard And here i take one Array List in Which i store every Vcard String of Every Conatact
* Here i take one Cursor and this cursor is not null and its count>0 than i repeat one loop up to cursor.getcount() means Up to number of phone contacts.
* And in Every Loop i can make vcard string and store in Array list which i declared as a Global.
* And in Every Loop i move cursor next and print log in logcat.
* */
getVcardString();
}
private void getVcardString() {
// TODO Auto-generated method stub
vCard = new ArrayList<String>();
cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
if(cursor!=null&&cursor.getCount()>0)
{
cursor.moveToFirst();
for(int i =0;i<cursor.getCount();i++)
{
get(cursor);
Log.d("TAG", "Contact "+(i+1)+"VcF String is"+vCard.get(i));
cursor.moveToNext();
}
}
else
{
Log.d("TAG", "No Contacts in Your Phone");
}
}
public void get(Cursor cursor)
{
//cursor.moveToFirst();
String lookupKey = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
AssetFileDescriptor fd;
try {
fd = this.getContentResolver().openAssetFileDescriptor(uri, "r");
// Your Complex Code and you used function without loop so how can you get all Contacts Vcard.??
/* FileInputStream fis = fd.createInputStream();
byte[] buf = new byte[(int) fd.getDeclaredLength()];
fis.read(buf);
String VCard = new String(buf);
String path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
FileOutputStream out = new FileOutputStream(path);
out.write(VCard.toString().getBytes());
Log.d("Vcard", VCard);*/
FileInputStream fis = fd.createInputStream();
byte[] buf = new byte[(int) fd.getDeclaredLength()];
fis.read(buf);
String vcardstring= new String(buf);
vCard.add(vcardstring);
String storage_path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
FileOutputStream mFileOutputStream = new FileOutputStream(storage_path, false);
mFileOutputStream.write(vcardstring.toString().getBytes());
} catch (Exception e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
回答2:
Android Nougat Update :
Other answers code working for lots of people before Nougat update.
Please take care of :
byte[] buf = new byte[(int) fd.getDeclaredLength()];
is not working on Android Nougat.
fd.getDeclaredLength() is always return -1.
Please use below code for read bytes without any library :
byte[] buf = readBytes(fis);
public byte[] readBytes(InputStream inputStream) throws IOException {
// this dynamically extends to take the bytes you read
ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
// this is storage overwritten on each iteration with bytes
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
// we need to know how may bytes were read to write them to the byteBuffer
int len = 0;
while ((len = inputStream.read(buffer)) != -1) {
byteBuffer.write(buffer, 0, len);
}
// and then we can return your byte array.
return byteBuffer.toByteArray();
}
The method readBytes() get from this answer.
回答3:
Try out this. its work for me to create a .vcf file of all contact and stored it into SDCARD.
make sure all permission are give properly.
public static void getVCF()
{
final String vfile = "POContactsRestore.vcf";
Cursor phones = mContext.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null, null, null);
phones.moveToFirst();
for(int i =0;i<phones.getCount();i++)
{
String lookupKey = phones.getString(phones.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
AssetFileDescriptor fd;
try
{
fd = mContext.getContentResolver().openAssetFileDescriptor(uri, "r");
FileInputStream fis = fd.createInputStream();
byte[] buf = new byte[(int) fd.getDeclaredLength()];
fis.read(buf);
String VCard = new String(buf);
String path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
FileOutputStream mFileOutputStream = new FileOutputStream(path, true);
mFileOutputStream.write(VCard.toString().getBytes());
phones.moveToNext();
Log.d("Vcard", VCard);
}
catch (Exception e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
回答4:
I have removed the exception and other error and below is my CODE :
private final String vfile = "POContactsRestore.vcf";
Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,
null, null, null);
phones.moveToFirst();
String lookupKey = phones.getString(phones.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
AssetFileDescriptor fd;
try {
fd = this.getContentResolver().openAssetFileDescriptor(uri, "r");
FileInputStream fis = fd.createInputStream();
byte[] buf = new byte[(int) fd.getDeclaredLength()];
fis.read(buf);
String vCard = new String(buf);
String path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
FileOutputStream mFileOutputStream = new FileOutputStream(path, false);
mFileOutputStream.write(vCard.toString().getBytes());
Log.d("Vcard", vCard);
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
If you can iterate through loop and get the vCard for the contacts and store it in the SDCARD.
回答5:
I tried above two codes and I got the .VCF file too, but it was containing only one contact. so here is Perfectly Edited and running code....you will get all contacts in .VCF file:
private void getVcardString() throws IOException {
// TODO Auto-generated method stub
vCard = new ArrayList<String>(); // Its global....
cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
if(cursor!=null&&cursor.getCount()>0)
{
int i;
String storage_path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
FileOutputStream mFileOutputStream = new FileOutputStream(storage_path, false);
cursor.moveToFirst();
for(i = 0;i<cursor.getCount();i++)
{
get(cursor);
Log.d("TAG", "Contact "+(i+1)+"VcF String is"+vCard.get(i));
cursor.moveToNext();
mFileOutputStream.write(vCard.get(i).toString().getBytes());
}
mFileOutputStream.close();
cursor.close();
}
else
{
Log.d("TAG", "No Contacts in Your Phone");
}
}
Second Method:
private void get(Cursor cursor2) {
String lookupKey = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
AssetFileDescriptor fd;
try {
fd = this.getContentResolver().openAssetFileDescriptor(uri, "r");
FileInputStream fis = fd.createInputStream();
byte[] buf = new byte[(int) fd.getDeclaredLength()];
fis.read(buf);
String vcardstring= new String(buf);
vCard.add(vcardstring);
} catch (Exception e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
Please Don't forget to add :
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
回答6:
It's working for me and as well working in Nougat devices. Thank you so much @pratik and @sanat .
public static void getVCF(Context context)
{
final String vfile = "POContactsRestore.vcf";
Cursor phones = context.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null, null, null);
phones.moveToFirst();
for(int i =0;i<phones.getCount();i++)
{
String lookupKey = phones.getString(phones.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
AssetFileDescriptor fd;
try
{
fd = context.getContentResolver().openAssetFileDescriptor(uri, "r");
FileInputStream fis = fd.createInputStream();
byte[] buf = readBytes(fis);
fis.read(buf);
String VCard = new String(buf);
String path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
FileOutputStream mFileOutputStream = new FileOutputStream(path, true);
mFileOutputStream.write(VCard.toString().getBytes());
phones.moveToNext();
Log.d("Vcard", VCard);
}
catch (Exception e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
public static byte[] readBytes(InputStream inputStream) throws IOException {
// this dynamically extends to take the bytes you read
ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
// this is storage overwritten on each iteration with bytes
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
// we need to know how may bytes were read to write them to the byteBuffer
int len = 0;
while ((len = inputStream.read(buffer)) != -1) {
byteBuffer.write(buffer, 0, len);
}
// and then we can return your byte array.
return byteBuffer.toByteArray();
}
回答7:
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.ContactsContract;
import android.app.Activity;
import android.content.res.AssetFileDescriptor;
import android.database.Cursor;
import android.util.Log;
public class Contacts extends Activity{
Cursor cursor;
ArrayList<String> vCard ;
String vfile;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
try {
getVcardString();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void getVcardString() throws IOException {
final String vfile = "POContactsRestore.vcf";
// TODO Auto-generated method stub
vCard = new ArrayList<String>();
cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
if(cursor!=null&&cursor.getCount()>0)
{
int i;
String storage_path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
FileOutputStream mFileOutputStream = new FileOutputStream(storage_path, false);
cursor.moveToFirst();
for(i = 0;i<cursor.getCount();i++)
{
get(cursor);
Log.d("TAG", "Contact "+(i+1)+"VcF String is"+vCard.get(i));
cursor.moveToNext();
mFileOutputStream.write(vCard.get(i).toString().getBytes());
}
mFileOutputStream.close();
cursor.close();
}
else
{
Log.d("TAG", "No Contacts in Your Phone");
}
}
private void get(Cursor cursor2) {
String lookupKey = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
AssetFileDescriptor fd;
try {
fd = this.getContentResolver().openAssetFileDescriptor(uri, "r");
FileInputStream fis = fd.createInputStream();
byte[] buf = new byte[(int) fd.getDeclaredLength()];
fis.read(buf);
String vcardstring= new String(buf);
vCard.add(vcardstring);
} catch (Exception e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.anthem.contactbackup"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="5"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.READ_CONTACTS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".Con"
android:label="@string/title_activity_contact_backup" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
回答8:
private void convertToVcfFile(String contactId, File contactFile) {
Cursor mCursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null, ContactsContract.CommonDataKinds.Phone._ID + " = " + contactId,
null, null);
if(mCursor != null && mCursor.moveToFirst()) {
do {
String mLookupKey = mCursor.getString(mCursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri mUri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, mLookupKey);
try {
AssetFileDescriptor mAssetFileDescriptor = getContentResolver().openAssetFileDescriptor(mUri, "r");
if (mAssetFileDescriptor != null) {
FileInputStream mFileInputStream = mAssetFileDescriptor.createInputStream();
byte[] mBuffer = new byte[(int) mAssetFileDescriptor.getDeclaredLength()];
mFileInputStream.read(mBuffer);
String VCardString = new String(mBuffer);
FileOutputStream mFileOutputStream = new FileOutputStream(contactFile, true);
mFileOutputStream.write(VCardString.getBytes());
}
} catch (Exception e1) {
e1.printStackTrace();
}
} while (mCursor.moveToNext());
mCursor.close();
}
}
来源：https://stackoverflow.com/questions/8147563/export-the-contacts-as-vcf-file