0
很少一段時間，我開始使用數據庫和內容提供商，我做了一個簡單的應用程序來學習如何使用它們。Access數據庫與供應商
現在，我正在開發另一個應用程序，它具有與我所做的功能幾乎相同的功能。我試圖實現適用於新應用的相同代碼，但是我收到一個錯誤，我無法找到原因。
這是logcat的輸出：
02-11 10:45:59.014: E/ActivityThread(22665): Failed to find provider info for com.final.reversegeocoding
02-11 10:45:59.024: E/AndroidRuntime(22665): FATAL EXCEPTION: main
02-11 10:45:59.024: E/AndroidRuntime(22665): java.lang.IllegalArgumentException: Unknown URL content://com.final.reversegeocoding/places
02-11 10:45:59.024: E/AndroidRuntime(22665): at android.content.ContentResolver.insert(ContentResolver.java:913)
02-11 10:45:59.024: E/AndroidRuntime(22665): at com.final.reversegeocoding.GeocodingActivity.insertPlaces(GeocodingActivity.java:427)
02-11 10:45:59.024: E/AndroidRuntime(22665): at com.final.reversegeocoding.GeocodingActivity.access$27(GeocodingActivity.java:416)
02-11 10:45:59.024: E/AndroidRuntime(22665): at com.final.reversegeocoding.GeocodingActivity$6.onClick(GeocodingActivity.java:288)
02-11 10:45:59.024: E/AndroidRuntime(22665): at android.view.View.performClick(View.java:4475)
02-11 10:45:59.024: E/AndroidRuntime(22665): at android.view.View$PerformClick.run(View.java:18786)
02-11 10:45:59.024: E/AndroidRuntime(22665): at android.os.Handler.handleCallback(Handler.java:730)
02-11 10:45:59.024: E/AndroidRuntime(22665): at android.os.Handler.dispatchMessage(Handler.java:92)
02-11 10:45:59.024: E/AndroidRuntime(22665): at android.os.Looper.loop(Looper.java:137)
02-11 10:45:59.024: E/AndroidRuntime(22665): at android.app.ActivityThread.main(ActivityThread.java:5419)
02-11 10:45:59.024: E/AndroidRuntime(22665): at java.lang.reflect.Method.invokeNative(Native Method)
02-11 10:45:59.024: E/AndroidRuntime(22665): at java.lang.reflect.Method.invoke(Method.java:525)
02-11 10:45:59.024: E/AndroidRuntime(22665): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
02-11 10:45:59.024: E/AndroidRuntime(22665): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
02-11 10:45:59.024: E/AndroidRuntime(22665): at dalvik.system.NativeStart.main(Native Method)
這是該應用程序如下保存在數據庫中值的道路：
MainActivity（GeocodingActivity）
private void insertPlaces(String number, String street, String city, String country1, String country2, String lat, String lng){
ContentValues newValues = new ContentValues();
newValues.put(Places.NUMBER, number);
newValues.put(Places.STREET, street);
newValues.put(Places.CITY, city);
newValues.put(Places.COUNTRY1, country1);
newValues.put(Places.COUNTRY2, country2);
newValues.put(Places.LAT, lat);
newValues.put(Places.LNG, lng);
getContentResolver().insert(PlacesProvider.CONTENT_URI, newValues);
}
的ContentProvider （PlacesProvider）
public class PlacesProvider extends ContentProvider {
/*CONTENT_URI*/
private static final String AUTHORITY = "com.final.reversegeocoding";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/places");
private PlacesDatabaseHelper mDbHelper;
private SQLiteDatabase database;
/**UriMatcher*/
private static final int URI_PLACES = 1;
private static final int URI_PLACE_ITEM = 2;
private static final UriMatcher mUriMatcher;
static {
mUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
mUriMatcher.addURI(AUTHORITY, "places", URI_PLACES);
mUriMatcher.addURI(AUTHORITY, "places/#", URI_PLACE_ITEM);
}
public class Places implements BaseColumns {
public static final String NUMBER= "number";
public static final String STREET= "street";
public static final String CITY= "city";
public static final String COUNTRY1= "country1";
public static final String COUNTRY2= "pacountry2s";
public static final String LAT = "latitude";
public static final String LNG = "longitude";
}
@Override
public boolean onCreate() {
mDbHelper = new PlacesDatabaseHelper(getContext());
return true;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
database = mDbHelper.getWritableDatabase();
long id = database.insert(PlacesDatabaseHelper.TABLE_NAME, null, values);
Uri result = null;
if (id >= 0){
result = ContentUris.withAppendedId(CONTENT_URI, id);
getContext().getContentResolver().notifyChange(uri, null);
}
return result;
}