我在下面有内容提供商。这是我的数据库的接口，它有几个表，消息，电话，交易等。
我可以使用查询方法和游标加载器检索数据。我在列表视图中显示数据时这样做。
据我所知，如果我想插入数据，我必须使用contentResolver。如下所示。
getContentResolver().insert(URI, values);
我如何插入消息表中？例如？
我可以看到内容提供程序中有一个uriMatching机制，但是在使用内容提供程序执行插入时如何指定特定的表。我如何在contentResolver中指定它？
我是否必须像在查询方法中那样执行切换？
提前致谢
太
public class RR3ContentProvider extends ContentProvider {
private static final String TAG = RR3ContentProvider.class.getSimpleName();
NfcScannerApplication nfcAppObj;
static final String PROVIDER_NAME = "com.carefreegroup.rr3.ContentProvider";
static final String URLPHONENUMBERS = "content://" + PROVIDER_NAME + "/phonenumbers";
static final Uri CONTENT_URI_PHONE_NUMBERS = Uri.parse(URLPHONENUMBERS);
static final String _ID_PHONENUMBERS = "_id";
static final String PHONE_NAME = "phonename";
static final String PHONE_NUMBER = "phonenumber";
static final String TABLEPHONE = "phone";
private static HashMap<String, String> PHONE_PROJECTION_MAP;
static final int PHONES = 1;
static final int PHONE_ID = 2;
static final String URLMESSAGES = "content://" + PROVIDER_NAME + "/messages";
static final Uri CONTENT_URI_MESSAGES = Uri.parse(URLMESSAGES);
static final String _ID_MESSAGES = "_id";
static final String MESSAGE_CREATED_AT = "messagecreatedat";
static final String MESSAGE_TEXT = "messagetext";
static final String MESSAGE_SENDER = "messagesender";
static final String TABLEMESSAGE = "message";
private static HashMap<String, String> MESSAGE_PROJECTION_MAP;
static final int MESSAGES = 3;
static final int MESSAGE_ID = 4;
public static final String C_ID = BaseColumns._ID; // special for id
// internally in system
static final String URLTRANSACTIONS = "content://" + PROVIDER_NAME + "/transactions";
static final Uri CONTENT_URI_TRANSACTIONS = Uri.parse(URLTRANSACTIONS);
static final String _ID_TRANSACTIONS = "_id";
static final String TRANSACTIONS_TYPE = "type";
static final String TRANSACTIONS_COMPANY_ID = "companyid";
static final String TRANSACTIONS_PERSON_ID = "person";
static final String TRANSACTIONS_NAME = "name";
static final String TRANSACTIONS_TAG_ID = "tagid";
static final String TRANSACTIONS_STATUS = "status";
static final String TRANSACTIONS_TAG_SCAN_TIME = "tagscantime";
static final String TRANSACTIONS_TAG_SENTSERVER_TIME = "tagsentservertime";
static final String TRANSACTIONS_TRANSACTIONS_LATITUDE = "transactionslatitude";
static final String TRANSACTIONS_TRANSACTIONS_LONGITUDE = "transactionslongitude";
static final String TRANSACTIONS_DRIVER = "driver";
static final String TABLETRANSACTIONS = "transactions";
private static HashMap<String, String> TRANSACTIONS_PROJECTION_MAP;
static final int TRANSACTIONS = 5;
static final int TRANSACTION_ID = 6;
static final String URLLOG = "content://" + PROVIDER_NAME + "/log";
static final Uri CONTENT_URI_LOG = Uri.parse(URLLOG);
static final String _ID_Log = "_id";
static final String LOG_CALLID = "logcallid";
static final String LOG_MESSAGE = "logmessage";
static final String LOG_CREATED_TIME = "logcreatedtime";
static final String LOG_CLIENTID = "logclientid";
static final String LOG_CARERID = "logcarerid";
static final String LOG_SERVER_TIME = "logservertime";
static final String TABLELOG = "log";
private static HashMap<String, String> LOG_PROJECTION_MAP;
static final int LOG = 7;
static final int LOG_ID = 8;
static final UriMatcher uriMatcher;
static{
uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
uriMatcher.addURI(PROVIDER_NAME, "phonenumbers", PHONES);
uriMatcher.addURI(PROVIDER_NAME, "phonenumbers/#", PHONE_ID);
uriMatcher.addURI(PROVIDER_NAME, "messages", MESSAGES);
uriMatcher.addURI(PROVIDER_NAME, "messages/#", MESSAGE_ID);
uriMatcher.addURI(PROVIDER_NAME, "transactions", TRANSACTIONS);
uriMatcher.addURI(PROVIDER_NAME, "transactions/#", TRANSACTION_ID);
uriMatcher.addURI(PROVIDER_NAME, "log", LOG);
uriMatcher.addURI(PROVIDER_NAME, "log/#", LOG_ID);
}
/**
* Database specific constant declarations
*/
private SQLiteDatabase db;
@Override
public boolean onCreate() {
Context context = getContext();
nfcAppObj = (NfcScannerApplication) getContext();
Log.e(TAG, "inside RR3ContentProvider onCreate");
return (nfcAppObj == null)? false:true;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
db = nfcAppObj.getDb();
long rowID = db.insert( TABLEPHONE, "", values);
/**
* If record is added successfully
*/
if (rowID > 0)
{
Uri _uri = ContentUris.withAppendedId(CONTENT_URI_PHONE_NUMBERS, rowID);
getContext().getContentResolver().notifyChange(_uri, null);
return _uri;
}
throw new SQLException("Failed to add a record into " + uri);
}
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
Log.e(TAG, "inside RR3ContentProvider query method");
db = nfcAppObj.getDb();
SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
switch (uriMatcher.match(uri)) {
case PHONES:
Log.e(TAG, "CASE PHONES");
qb.setTables(TABLEPHONE);
qb.setProjectionMap(PHONE_PROJECTION_MAP);
if (sortOrder == null || sortOrder == ""){
sortOrder = PHONE_NAME;
}
break;
case PHONE_ID:
Log.e(TAG, "CASE PHONE_ID");
qb.setTables(TABLEPHONE);
qb.appendWhere( _ID_PHONENUMBERS + "=" + uri.getPathSegments().get(1));
if (sortOrder == null || sortOrder == ""){
sortOrder = PHONE_NAME;
}
break;
case MESSAGES:
Log.e(TAG, "CASE MESSAGES");
qb.setTables(TABLEMESSAGE);
qb.setProjectionMap(MESSAGE_PROJECTION_MAP);
if (sortOrder == null || sortOrder == ""){
sortOrder = MESSAGE_CREATED_AT + " DESC";
}
break;
case MESSAGE_ID:
Log.e(TAG, "CASE MESAAGE_ID");
qb.setTables(TABLEMESSAGE);
qb.appendWhere( _ID_MESSAGES + "=" + uri.getPathSegments().get(1));
if (sortOrder == null || sortOrder == ""){
sortOrder = MESSAGE_CREATED_AT + " DESC";
}
break;
case TRANSACTIONS:
Log.e(TAG, "CASE TRANSACTIONS");
qb.setTables(TABLETRANSACTIONS);
qb.setProjectionMap(TRANSACTIONS_PROJECTION_MAP);
if (sortOrder == null || sortOrder == ""){
sortOrder = TRANSACTIONS_TAG_SCAN_TIME + " DESC";
}
break;
case TRANSACTION_ID:
Log.e(TAG, "CASE TRANSACTION_ID");
qb.setTables(TABLETRANSACTIONS);
qb.appendWhere( _ID_TRANSACTIONS + "=" + uri.getPathSegments().get(1));
if (sortOrder == null || sortOrder == ""){
sortOrder = TRANSACTIONS_TAG_SCAN_TIME + " DESC";
}
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// switch (uriMatcher.match(uri)) {
// case PHONES:
//
// if (sortOrder == null || sortOrder == ""){
//
// sortOrder = PHONE_NAME;
// }
//
// break;
//
// case PHONE_ID:
//
// if (sortOrder == null || sortOrder == ""){
//
// sortOrder = PHONE_NAME;
// }
//
// break;
//
//
// case MESSAGES:
//
// if (sortOrder == null || sortOrder == ""){
//
// sortOrder = MESSAGE_CREATED_AT + " DESC";
// }
//
// break;
//
// case MESSAGE_ID:
//
// if (sortOrder == null || sortOrder == ""){
//
// sortOrder = MESSAGE_CREATED_AT + " DESC";
// }
//
// break;
//
// default:
//
// throw new IllegalArgumentException("Unknown URI " + uri);
// }
//
Log.e(TAG, "About to do the query method in content provider");
Cursor c = qb.query(db, projection, selection, selectionArgs,
null, null, sortOrder);
/**
* register to watch a content URI for changes
*/
c.setNotificationUri(getContext().getContentResolver(), uri);
return c;
}//end of query
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
db = nfcAppObj.getDb();
int count = 0;
switch (uriMatcher.match(uri)){
case PHONES:
count = db.delete(TABLEPHONE, selection, selectionArgs);
break;
case PHONE_ID:
String id = uri.getPathSegments().get(1);
count = db.delete( TABLEPHONE, _ID_PHONENUMBERS + " = " + id +
(!TextUtils.isEmpty(selection) ? " AND (" +
selection + ')' : ""), selectionArgs);
break;
case MESSAGES:
count = db.delete(TABLEMESSAGE, selection, selectionArgs);
break;
case MESSAGE_ID:
String id2 = uri.getPathSegments().get(1);
count = db.delete( TABLEMESSAGE, _ID_MESSAGES + " = " + id2 +
(!TextUtils.isEmpty(selection) ? " AND (" +
selection + ')' : ""), selectionArgs);
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return count;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
db = nfcAppObj.getDb();
int count = 0;
switch (uriMatcher.match(uri)){
case PHONES:
count = db.update(TABLEPHONE, values,
selection, selectionArgs);
break;
case PHONE_ID:
count = db.update(TABLEPHONE, values, _ID_PHONENUMBERS +
" = " + uri.getPathSegments().get(1) +
(!TextUtils.isEmpty(selection) ? " AND (" +
selection + ')' : ""), selectionArgs);
break;
case MESSAGES:
count = db.update(TABLEMESSAGE, values,
selection, selectionArgs);
break;
case MESSAGE_ID:
count = db.update(TABLEMESSAGE, values, _ID_MESSAGES +
" = " + uri.getPathSegments().get(1) +
(!TextUtils.isEmpty(selection) ? " AND (" +
selection + ')' : ""), selectionArgs);
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri );
}
getContext().getContentResolver().notifyChange(uri, null);
return count;
}//end of delete
@Override
public String getType(Uri uri) {
switch (uriMatcher.match(uri)){
/**
* Get all records
*/
case PHONES:
return "vnd.android.cursor.dir/vnd.example.phonenumbers";
/**
* Get a particular record
*/
case PHONE_ID:
return "vnd.android.cursor.item/vnd.example.phonenumbers";
/**
* Get all records
*/
case MESSAGES:
return "vnd.android.cursor.dir/vnd.example.messages";
/**
* Get a particular record
*/
case MESSAGE_ID:
return "vnd.android.cursor.item/vnd.example.messages";
default:
throw new IllegalArgumentException("Unsupported URI: " + uri);
}
}
}
[EDIT1] 我已经让它工作并使用以下代码插入Log表。
如果我想指定要插入的不同表，我是否必须在insert方法中执行switch语句？
ContentValues cv = new ContentValues();
cv.putNull(LoginValidate.C_ID_LOG);
cv.putNull(LoginValidate.C_LOG_CALLID);
cv.put(LoginValidate.C_LOG_MESSAGE, logString);
cv.put(LoginValidate.C_LOG_CREATED_TIME, formattedNowTime);
cv.put(LoginValidate.C_LOG_CLIENTID, clientID);
cv.put(LoginValidate.C_LOG_CARERID, carerID);
cv.putNull(LoginValidate.C_LOG_SERVER_TIME);
getContentResolver().insert(RR3ContentProvider.CONTENT_URI_LOG, cv);
答案 0 :(得分：0)
ContentValues cv = new ContentValues（）; cv.putNull（LoginValidate.C_ID_LOG）; cv.putNull（LoginValidate.C_LOG_CALLID）; cv.put（LoginValidate.C_LOG_MESSAGE，logString）; cv.put（LoginValidate.C_LOG_CREATED_TIME，formattedNowTime）; cv.put（LoginValidate.C_LOG_CLIENTID，clientID）; cv.put（LoginValidate.C_LOG_CARERID，carerID）; cv.putNull（LoginValidate.C_LOG_SERVER_TIME）;
getContentResolver().insert(RR3ContentProvider.CONTENT_URI_LOG, cv);