您好我正在构建内容提供程序。这里我得到了unsupportedOperationException
FATAL EXCEPTION: ModernAsyncTask #3
Process: com.subbu.sunshine, PID: 24784
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.support.v4.content.ModernAsyncTask$3.done(ModernAsyncTask.java:142)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.UnsupportedOperationException: Unknown uri: content://com.subbu.sunshine/weather/500081/1450809000000
at com.subbu.sunshine.data.WeatherProvider.query(WeatherProvider.java:214)
at android.content.ContentProvider.query(ContentProvider.java:978)
at android.content.ContentProvider$Transport.query(ContentProvider.java:213)
at android.content.ContentResolver.query(ContentResolver.java:478)
at android.support.v4.content.ContentResolverCompatJellybean.query(ContentResolverCompatJellybean.java:29)
at android.support.v4.content.ContentResolverCompat$ContentResolverCompatImplJB.query(ContentResolverCompat.java:57)
at android.support.v4.content.ContentResolverCompat.query(ContentResolverCompat.java:125)
at android.support.v4.content.CursorLoader.loa
以下是我的提供者类代码：
package com.subbu.sunshine.data;
import android.annotation.TargetApi;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
public class WeatherProvider extends ContentProvider {
// The URI Matcher used by this content provider.
private static final UriMatcher sUriMatcher = buildUriMatcher();
private WeatherDbHelper mOpenHelper;
static final int WEATHER = 100;
static final int WEATHER_WITH_LOCATION = 101;
static final int WEATHER_WITH_LOCATION_AND_DATE = 102;
static final int LOCATION = 300;
private static final SQLiteQueryBuilder sWeatherByLocationSettingQueryBuilder;
static {
sWeatherByLocationSettingQueryBuilder = new SQLiteQueryBuilder();
//This is an inner join which looks like
//weather INNER JOIN location ON weather.location_id = location._id
sWeatherByLocationSettingQueryBuilder.setTables(
WeatherContract.WeatherEntry.TABLE_NAME + " INNER JOIN " +
WeatherContract.LocationEntry.TABLE_NAME +
" ON " + WeatherContract.WeatherEntry.TABLE_NAME +
"." + WeatherContract.WeatherEntry.COLUMN_LOC_KEY +
" = " + WeatherContract.LocationEntry.TABLE_NAME +
"." + WeatherContract.LocationEntry._ID);
}
//location.location_setting = ?
private static final String sLocationSettingSelection =
WeatherContract.LocationEntry.TABLE_NAME +
"." + WeatherContract.LocationEntry.COLUMN_LOCATION_SETTING + " = ? ";
//location.location_setting = ? AND date >= ?
private static final String sLocationSettingWithStartDateSelection =
WeatherContract.LocationEntry.TABLE_NAME +
"." + WeatherContract.LocationEntry.COLUMN_LOCATION_SETTING + " = ? AND " +
WeatherContract.WeatherEntry.COLUMN_DATE + " >= ? ";
//location.location_setting = ? AND date = ?
private static final String sLocationSettingAndDaySelection =
WeatherContract.LocationEntry.TABLE_NAME +
"." + WeatherContract.LocationEntry.COLUMN_LOCATION_SETTING + " = ? AND " +
WeatherContract.WeatherEntry.COLUMN_DATE + " = ? ";
private Cursor getWeatherByLocationSetting(Uri uri, String[] projection, String sortOrder) {
String locationSetting = WeatherContract.WeatherEntry.getLocationSettingFromUri(uri);
long startDate = WeatherContract.WeatherEntry.getStartDateFromUri(uri);
String[] selectionArgs;
String selection;
if (startDate == 0) {
selection = sLocationSettingSelection;
selectionArgs = new String[]{locationSetting};
} else {
selectionArgs = new String[]{locationSetting, Long.toString(startDate)};
selection = sLocationSettingWithStartDateSelection;
}
return sWeatherByLocationSettingQueryBuilder.query(mOpenHelper.getReadableDatabase(),
projection,
selection,
selectionArgs,
null,
null,
sortOrder
);
}
private Cursor getWeatherByLocationSettingAndDate(
Uri uri, String[] projection, String sortOrder) {
String locationSetting = WeatherContract.WeatherEntry.getLocationSettingFromUri(uri);
long date = WeatherContract.WeatherEntry.getDateFromUri(uri);
return sWeatherByLocationSettingQueryBuilder.query(mOpenHelper.getReadableDatabase(),
projection,
sLocationSettingAndDaySelection,
new String[]{locationSetting, Long.toString(date)},
null,
null,
sortOrder
);
}
/*
Students: Here is where you need to create the UriMatcher. This UriMatcher will
match each URI to the WEATHER, WEATHER_WITH_LOCATION, WEATHER_WITH_LOCATION_AND_DATE,
and LOCATION integer constants defined above. You can test this by uncommenting the
testUriMatcher test within TestUriMatcher.
*/
static UriMatcher buildUriMatcher() {
// 1) The code passed into the constructor represents the code to return for the root
// URI. It's common to use NO_MATCH as the code for this case. Add the constructor below.
UriMatcher uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
// 2) Use the addURI function to match each of the types. Use the constants from
// WeatherContract to help define the types to the UriMatcher.
uriMatcher.addURI(WeatherContract.CONTENT_AUTHORITY, WeatherContract.PATH_WEATHER, WEATHER);
uriMatcher.addURI(WeatherContract.CONTENT_AUTHORITY, WeatherContract.PATH_WEATHER + "/#", WEATHER_WITH_LOCATION);
uriMatcher.addURI(WeatherContract.CONTENT_AUTHORITY, WeatherContract.PATH_WEATHER + "/*/#", WEATHER_WITH_LOCATION_AND_DATE);
uriMatcher.addURI(WeatherContract.CONTENT_AUTHORITY, WeatherContract.PATH_LOCATION, LOCATION);
// 3) Return the new matcher!
return uriMatcher;
}
/*
Students: We've coded this for you. We just create a new WeatherDbHelper for later use
here.
*/
@Override
public boolean onCreate() {
mOpenHelper = new WeatherDbHelper(getContext());
return true;
}
/*
Students: Here's where you'll code the getType function that uses the UriMatcher. You can
test this by uncommenting testGetType in TestProvider.
*/
@Override
public String getType(Uri uri) {
// Use the Uri Matcher to determine what kind of URI this is.
final int match = sUriMatcher.match(uri);
switch (match) {
// Student: Uncomment and fill out these two cases
case WEATHER_WITH_LOCATION_AND_DATE:
return WeatherContract.WeatherEntry.CONTENT_ITEM_TYPE;
case WEATHER_WITH_LOCATION:
return WeatherContract.WeatherEntry.CONTENT_TYPE;
case WEATHER:
return WeatherContract.WeatherEntry.CONTENT_TYPE;
case LOCATION:
return WeatherContract.LocationEntry.CONTENT_TYPE;
default:
throw new UnsupportedOperationException("Unknown uri: " + uri);
}
}
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
// Here's the switch statement that, given a URI, will determine what kind of request it is,
// and query the database accordingly.
Cursor retCursor;
switch (sUriMatcher.match(uri)) {
// "weather/*/*"
case WEATHER_WITH_LOCATION_AND_DATE: {
retCursor = getWeatherByLocationSettingAndDate(uri, projection, sortOrder);
break;
}
// "weather/*"
case WEATHER_WITH_LOCATION: {
retCursor = getWeatherByLocationSetting(uri, projection, sortOrder);
break;
}
// "weather"
case WEATHER: {
retCursor = mOpenHelper.getReadableDatabase().query(
WeatherContract.WeatherEntry.TABLE_NAME,
projection,
selection,
selectionArgs,
null,
null,
sortOrder
);
break;
}
// "location"
case LOCATION: {
retCursor = mOpenHelper.getReadableDatabase().query(
WeatherContract.LocationEntry.TABLE_NAME,
projection,
selection,
selectionArgs,
null,
null,
sortOrder
);
break;
}
default:
throw new UnsupportedOperationException("Unknown uri: " + uri);
}
retCursor.setNotificationUri(getContext().getContentResolver(), uri);
return retCursor;
}
/*
Student: Add the ability to insert Locations to the implementation of this function.
*/
@Override
public Uri insert(Uri uri, ContentValues values) {
final SQLiteDatabase db = mOpenHelper.getWritableDatabase();
final int match = sUriMatcher.match(uri);
Uri returnUri;
switch (match) {
case WEATHER: {
normalizeDate(values);
long _id = db.insert(WeatherContract.WeatherEntry.TABLE_NAME, null, values);
if (_id > 0)
returnUri = WeatherContract.WeatherEntry.buildWeatherUri(_id);
else
throw new android.database.SQLException("Failed to insert row into " + uri);
break;
}
case LOCATION: {
long _id = db.insert(WeatherContract.LocationEntry.TABLE_NAME, null, values);
if (_id > 0)
returnUri = WeatherContract.LocationEntry.buildLocationUri(_id);
else
throw new android.database.SQLException("Failed to insert row into " + uri);
break;
}
default:
throw new UnsupportedOperationException("Unknown uri: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
db.close();
return returnUri;
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
// Student: Start by getting a writable database
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
// Student: Use the uriMatcher to match the WEATHER and LOCATION URI's we are going to
// handle. If it doesn't match these, throw an UnsupportedOperationException.
// Student: A null value deletes all rows. In my implementation of this, I only notified
// the uri listeners (using the content resolver) if the rowsDeleted != 0 or the selection
// is null.
// Oh, and you should notify the listeners here.
// Student: return the actual rows deleted
int match = sUriMatcher.match(uri);
int rowsDeleted;
switch (match) {
case WEATHER:
rowsDeleted = db.delete(WeatherContract.WeatherEntry.TABLE_NAME,
selection, selectionArgs);
break;
case LOCATION:
rowsDeleted = db.delete(WeatherContract.LocationEntry.TABLE_NAME,
selection, selectionArgs);
break;
default:
throw new UnsupportedOperationException("Unknown uri:" + uri);
}
if (rowsDeleted != 0) {
getContext().getContentResolver().notifyChange(uri, null);
}
return rowsDeleted;
}
private void normalizeDate(ContentValues values) {
// normalize the date value
if (values.containsKey(WeatherContract.WeatherEntry.COLUMN_DATE)) {
long dateValue = values.getAsLong(WeatherContract.WeatherEntry.COLUMN_DATE);
values.put(WeatherContract.WeatherEntry.COLUMN_DATE, WeatherContract.normalizeDate(dateValue));
}
}
@Override
public int update(
Uri uri, ContentValues values, String selection, String[] selectionArgs) {
// Student: This is a lot like the delete function. We return the number of rows impacted
// by the update.
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
int match = sUriMatcher.match(uri);
int rowsUpdated;
switch (match) {
case WEATHER:
normalizeDate(values);
rowsUpdated = db.update(WeatherContract.WeatherEntry.TABLE_NAME, values,
selection, selectionArgs);
break;
case LOCATION:
rowsUpdated = db.update(WeatherContract.LocationEntry.TABLE_NAME, values,
selection, selectionArgs);
break;
default:
throw new UnsupportedOperationException("Unknown uri:" + uri);
}
if (rowsUpdated != 0) {
getContext().getContentResolver().notifyChange(uri, null);
}
return rowsUpdated;
}
@Override
public int bulkInsert(Uri uri, ContentValues[] values) {
final SQLiteDatabase db = mOpenHelper.getWritableDatabase();
final int match = sUriMatcher.match(uri);
switch (match) {
case WEATHER:
db.beginTransaction();
int returnCount = 0;
try {
for (ContentValues value : values) {
normalizeDate(value);
long _id = db.insert(WeatherContract.WeatherEntry.TABLE_NAME, null, value);
if (_id != -1) {
returnCount++;
}
}
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
getContext().getContentResolver().notifyChange(uri, null);
return returnCount;
default:
return super.bulkInsert(uri, values);
}
}
// You do not need to call this method. This is a method specifically to assist the testing
// framework in running smoothly. You can read more at:
// http://developer.android.com/reference/android/content/ContentProvider.html#shutdown()
@Override
@TargetApi(11)
public void shutdown() {
mOpenHelper.close();
super.shutdown();
}
}
我正在从下面的Fragement调用cursorLoader对象。 你能帮帮我一个人吗？
答案 0 :(得分：2)
我解决了自己的问题。 问题出在buildUriMatcher（）方法中，更改此行
uriMatcher.addURI(WeatherContract.CONTENT_AUTHORITY, WeatherContract.PATH_WEATHER + "/#", WEATHER_WITH_LOCATION);
到
uriMatcher.addURI(WeatherContract.CONTENT_AUTHORITY, WeatherContract.PATH_WEATHER + "/*", WEATHER_WITH_LOCATION);