我仍然习惯于查看 logcats。我正在创建一个联系人应用程序来学习 android 开发，当我尝试加载此联系人信息时出现错误。如果可以，请解释一下这个 logcat，这样我就有机会更好地理解如何阅读它们。它正在尝试检索联系人 ID = 3 的信息。提前致谢
代码：
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");
new Thread(new Runnable() {
@Override
public void run() {
uri = ContactsContract.Contacts.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;
// 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.post(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
tvPhoneFull.setText(phoneFull);
}
});
cursor.close();
}
}
}).start();
new Thread(new Runnable() {
@Override
public void run() {
uri = ContactsContract.CommonDataKinds.Email.CONTENT_URI;
projection = null;
selection = ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = " + contactId + " AND (" +
ContactsContract.Data.MIMETYPE + " = '" +
ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE + "')";
selectionArgs = null;
sortOrder = null;
Cursor emailCursor = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder);
while (emailCursor.moveToNext()) {
// Extract email address
emailFull = emailCursor.getString(
emailCursor.getColumnIndex(ContactsContract.CommonDataKinds.Email.ADDRESS));
}
tvPhoneFull.post(new Runnable() {
@Override
public void run() {
tvEmailFull.setText(emailFull);
}
});
emailCursor.close();
}
}).start();
}
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);
}
}
日志猫：
java.lang.IllegalArgumentException: Invalid column data1
at android.database.sqlite.SQLiteQueryBuilder.computeProjection(SQLiteQueryBuilder.java:632)
at android.database.sqlite.SQLiteQueryBuilder.buildQuery(SQLiteQueryBuilder.java:447)
at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:387)
at com.android.providers.contacts.ContactsProvider2.query(ContactsProvider2.java:6043)
at com.android.providers.contacts.ContactsProvider2.queryLocal(ContactsProvider2.java:6019)
at com.android.providers.contacts.ContactsProvider2.query(ContactsProvider2.java:4787)
at android.content.ContentProvider$Transport.query(ContentProvider.java:189)
at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:113)
at android.os.Binder.execTransact(Binder.java:351)
at dalvik.system.NativeStart.run(Native Method)
06-22 13:25:47.673 15139-15246/sat.tuts4mobile.customlistview E/AndroidRuntime: FATAL EXCEPTION: Thread-639
java.lang.IllegalArgumentException: Invalid column data1
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:167)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
at android.content.ContentProviderProxy.query(ContentProviderNative.java:366)
at android.content.ContentResolver.query(ContentResolver.java:372)
at android.content.ContentResolver.query(ContentResolver.java:315)
at sat.tuts4mobile.customlistview.ContactDetails$1.run(ContactDetails.java:51)
at java.lang.Thread.run(Thread.java:856)