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我是在互联网的帮助下自己制作的，并参考了几本书。下面的代码提取特定联系人的姓名和电话号码，并且可以正常工作（甜蜜）。我的问题是关于 selection 和 selectionArgs。如何添加电子邮件查询？

我不理解所有的等号和 AND withing 引号，所以如果你能指出我可以在哪里了解更多关于“选择”中使用的语言，而不是仅仅用代码给我答案，那也有帮助我非常。

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 cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER) 之后的错字）；

现在我得到了这个错误，当我重新复制我的代码时，我仍然得到它（减去线程引用）。感谢所有帮助：

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)
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2 回答 2

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，

对于电子邮件，您可以参考此。所有提供商都通过 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();

    }
于 2013-06-22T04:27:15.187 回答
1

感谢您澄清您遇到的问题。所以是的，

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 - 它缺少'之前的CONTENT_ITEM_TYPE.

为了扩展它，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，它确实会带来可怕的可读性和故障排除。

于 2013-06-22T04:59:22.993 回答