我是在互联网的帮助下自己做的，并且很多参考了几本书。下面的代码提取特定联系人的姓名和电话号码，它可以工作（甜蜜）。我的问题是选择和选择Args。如何添加电子邮件查询？
我不明白所有的等号和AND引用，所以如果你能指出我可以在哪里学到更多关于“选择”中使用的语言，而不仅仅是给我代码中的答案，那就是'我也非常帮助我。
提前致谢
import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.widget.TextView;
/**
* Created by Pete on 6/19/13.
*/
public class ContactDetails extends Activity {
TextView tvContactName, tvPhoneNum, tvPhoneType, tvPhoneFull,
tvEmailAdd, tvEmailType, tvEmailFull,
tvAddress, tvAddType, tvAddFull;
String contactId, contactName, phoneType, phoneFull, phoneNum1,
emailAdd, emailType, emailFull,
address, addType, addFull;
//Contact List query arguments
Uri uri;
String[] projection, selectionArgs;
String selection, sortOrder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.contactinfo);
initialize();
contactId = getIntent().getStringExtra("contactId");
contactName = getIntent().getStringExtra("contactName");
queryArgs();
// Create cursor searching for data associated with contactId
if (contactId != null) {
// Return all the PHONE data for the contact
Cursor cursor = getContentResolver().query(
uri, projection, selection, selectionArgs, sortOrder);
//Get the indexes of the required columns
while (cursor.moveToNext()) {
// Extract the name
contactName = cursor.getString(
cursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
tvContactName.setText(contactName);
// Extract the phone number
phoneFull = cursor.getString(
cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
tvPhoneFull.setText(phoneFull);
}
cursor.close();
}
}
public void initialize() {
tvContactName = (TextView)findViewById(R.id.tvContactName);
tvPhoneNum = (TextView)findViewById(R.id.tvPhoneNum);
tvPhoneType = (TextView)findViewById(R.id.tvPhoneType);
tvPhoneFull = (TextView)findViewById(R.id.tvPhoneFull);
tvEmailAdd = (TextView)findViewById(R.id.tvEmailAdd);
tvEmailType = (TextView)findViewById(R.id.tvEmailType);
tvEmailFull = (TextView)findViewById(R.id.tvEmailFull);
tvAddress = (TextView)findViewById(R.id.tvAddress);
tvAddType = (TextView)findViewById(R.id.tvAddType);
tvAddFull = (TextView)findViewById(R.id.tvAddFull);
}
public void queryArgs() {
// Cursor query arguments
uri = ContactsContract.Data.CONTENT_URI;
projection = new String[] {
ContactsContract.Data.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER
};
selection = ContactsContract.Data.CONTACT_ID + " = " + contactId + " AND " +
ContactsContract.Data.MIMETYPE + " = " +
ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE + "'";
selectionArgs = null;;
sortOrder = null;
}
public void setTextValues() {
tvContactName.setText(contactName);
tvPhoneNum.setText(phoneNum1);
tvPhoneType.setText(phoneType);
tvPhoneFull.setText(phoneFull);
tvEmailAdd.setText(emailAdd);
tvEmailType.setText(emailType);
tvEmailFull.setText(emailFull);
tvAddress.setText(address);
tvAddType.setText(addType);
tvAddFull.setText(addFull);
}
}
编辑： 我尝试了Sandy09的想法（减去我认为是在cursor.getColumnIndex（ContactsContract.CommonDataKinds.Phone.NUMBER）之后的拼写错误）;
现在我收到了这个错误，当我重新复制我的代码时，我得到了它（减去线程引用）。所有帮助表示赞赏：
06-22 04:45:56.316: E/AndroidRuntime(8818): FATAL EXCEPTION: Thread-273
06-22 04:45:56.316: E/AndroidRuntime(8818): android.database.sqlite.SQLiteException: unrecognized token: "'vnd.android.cursor.item/phone_v2))" (code 1): , while compiling: SELECT DISTINCT display_name, data1 FROM view_data data WHERE (1) AND ((contact_id = 1 AND mimetype = 'vnd.android.cursor.item/phone_v2))
06-22 04:45:56.316: E/AndroidRuntime(8818): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:181)
06-22 04:45:56.316: E/AndroidRuntime(8818): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
06-22 04:45:56.316: E/AndroidRuntime(8818): at android.content.ContentProviderProxy.query(ContentProviderNative.java:366)
06-22 04:45:56.316: E/AndroidRuntime(8818): at android.content.ContentResolver.query(ContentResolver.java:372)
06-22 04:45:56.316: E/AndroidRuntime(8818): at android.content.ContentResolver.query(ContentResolver.java:315)
06-22 04:45:56.316: E/AndroidRuntime(8818): at sat.tuts4mobile.customlistview.ContactDetails$1.run(ContactDetails.java:42)
06-22 04:45:56.316: E/AndroidRuntime(8818): at java.lang.Thread.run(Thread.java:856)
答案 0 :(得分：1)
Android更喜欢在新线程（任务）上运行数据库操作以避免ANR对话框，在新线程上编写查询，
对于email，您可以参考此内容。 所有providers通过Android doc。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initialize();
contactId = getIntent().getStringExtra("contactId");
contactName = getIntent().getStringExtra("contactName");
new Thread(new Runnable() {
@Override
public void run() {
queryArgs();
if (contactId != null) {
Cursor cursor = getContentResolver().query(uri, projection,
selection, selectionArgs, sortOrder);
while (cursor.moveToNext()) {
contactName = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
tvContactName.setText(contactName);
// Extract the phone number
phoneFull += cursor.getString(cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER))
+ " ,";
}
tvPhoneFull.post(new Runnable() {
@Override
public void run() {
tvPhoneFull.setText(phoneFull);
}
});
cursor.close();
}
}
}).start();
}
答案 1 :(得分：1)
感谢您澄清您遇到的问题。是的，
selection = ContactsContract.Data.CONTACT_ID + " = " + contactId + " AND " +
ContactsContract.Data.MIMETYPE + " = " +
ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE + "'";
选择电话号码。好吧，几乎 - 它在'之前缺少CONTENT_ITEM_TYPE。
为了扩展此功能，您需要添加一个额外的检查，如下所示：
selection = ContactsContract.Data.CONTACT_ID + " = " + contactId + " AND (" +
ContactsContract.Data.MIMETYPE + " = '" +
ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE + "' OR " +
ContactsContract.Data.MIMETYPE + " = '" +
ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE + "')";
这将转化为 -
CONTACT_ID = 123 AND ( MIMETYPE = 'Phone' OR MIMETYPE = 'Email' )
虽然使用合同类是正确的Android编程，但正如您所做的那样，它确实会导致可怕的可读性和故障排除。