我正在尝试使用以下代码将联系人导出为vCard格式:
(在此处找到:http://androidcodeexamples.blogspot.in/2012/06/export-contacts-as-vcf-file-in-android.html)
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();
}
}
但是我觉得fis.read(buf)引起了异常。
例外是:“读取失败:EINVAL(无效参数)。”
有人能帮助我吗?
谢谢! :)
答案 0 :(得分:1)
我刚看到相同的行为(尝试使用Android 4.0.3和4.1.2的模拟器)。它在真实设备上工作正常,不适用于模拟器。
答案 1 :(得分:1)
package com.example.temp;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
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;
public class MainActivity extends Activity {
Cursor cursor;
ArrayList<String> vCard;
String vfile;
static Context mContext;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = MainActivity.this;
getVCF();
}
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");
FileDescriptor fdd = fd.getFileDescriptor();
InputStream in = new FileInputStream(fdd);
//FileInputStream fis = fd.createInputStream();
Log.d("BLA BLA", "Len is :: " + (int) fd.getDeclaredLength());
byte[] buf = new byte[(int) fd.getDeclaredLength()];
in.read(buf);
fd.close();
String VCard = new String(buf);
String path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
FileOutputStream mFileOutputStream = new FileOutputStream(path, true);
mFileOutputStream.write(VCard.toString().getBytes());
mFileOutputStream.close();
in.close();
phones.moveToNext();
Log.d("Vcard", VCard);
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
}
答案 2 :(得分:0)
getDeclaredLength返回-1 在这种情况下,最好使用getStatSize()。
答案 3 :(得分:0)
我有一个相同的例外,但在一个真实的设备上。 问题是一个电子邮件具有未定义电子邮件类型的联系人