Java E/ActivityThread:未能找到提供程序信息(致命错误)
我得到了不同的错误,如:Java E/ActivityThread:未能找到提供程序信息(致命错误),java,android,google-maps,Java,Android,Google Maps,我得到了不同的错误,如: java.lang.RuntimeException: An error occurred while executing doInBackground() /ActivityThread: Failed to find provider info for (my package name here) E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1 Caused by: java.lang.IllegalArgume
java.lang.RuntimeException: An error occurred while executing doInBackground()
/ActivityThread: Failed to find provider info for (my package name here)
E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
Caused by: java.lang.IllegalArgumentException: Unknown URL content
Any ideas on what is wrong with my code?
I think that the error lies somewhere in the provider/uri creation
I took my package name out of the code for privacy reasons, I replaced it with ""
Thank you so much! :)
你好,
I am getting different errors saying:
java.lang.RuntimeException: An error occurred while executing doInBackground()
/ActivityThread: Failed to find provider info for (my package name here)
E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
Caused by: java.lang.IllegalArgumentException: Unknown URL content
Any ideas on what is wrong with my code?
I think that the error lies somewhere in the provider/uri creation
I took my package name out of the code for privacy reasons, I replaced it with ""
Thank you so much! :)
**Maps Activity.Java**
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.fragment.app.FragmentActivity;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import com.google.android.gms.maps.*;
import com.google.android.gms.maps.model.*;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback , LoaderManager.LoaderCallbacks {
private final LatLng LOCATION_UNIV = new LatLng(37.335371, -121.881050);
private final LatLng LOCATION_CS = new LatLng(37.333714, -121.881860);
private GoogleMap googleMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMapR) {
googleMap = googleMapR;
googleMap.addMarker(new MarkerOptions().position(LOCATION_CS).title("Find Me Here!"));
googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
@Override
public void onMapClick(LatLng point) {
// Drawing marker on the map
drawMarker(point);
// Creating an instance of ContentValues
ContentValues contentValues = new ContentValues();
// Setting latitude in ContentValues
contentValues.put(LocationsDB.FIELD_LAT, point.latitude);
// Setting longitude in ContentValues
contentValues.put(LocationsDB.FIELD_LNG, point.longitude);
// Setting zoom in ContentValues
contentValues.put(LocationsDB.FIELD_ZOOM, googleMap.getCameraPosition().zoom);
// Creating an instance of LocationInsertTask
LocationInsertTask insertTask = new LocationInsertTask();
// Storing the latitude, longitude and zoom level to SQLite database
insertTask.execute(contentValues);
Toast.makeText(getBaseContext(), "Marker is added to the Map", Toast.LENGTH_SHORT).show();
}
});
}
private class LocationInsertTask extends AsyncTask<ContentValues, Void, Void> {
@Override
protected Void doInBackground(ContentValues... contentValues) {
/** Setting up values to insert the clicked location into SQLite database */
getContentResolver().insert(LocationsContentProvider.CONTENT_URI, contentValues[0]);
return null;
}
}
private void drawMarker(LatLng point){
// Creating an instance of MarkerOptions
MarkerOptions markerOptions = new MarkerOptions();
// Setting latitude and longitude for the marker
markerOptions.position(point);
// Adding marker on the Google Map
googleMap.addMarker(markerOptions);
}
private class LocationDeleteTask extends AsyncTask<Void, Void, Void>{
@Override
protected Void doInBackground(Void... params) {
/** Deleting all the locations stored in SQLite database */
getContentResolver().delete(LocationsContentProvider.CONTENT_URI, null, null);
return null;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public Loader onCreateLoader(int arg0,
Bundle arg1) {
// Uri to the content provider LocationsContentProvider
Uri uri = LocationsContentProvider.CONTENT_URI;
// Fetches all the rows from locations table
return new CursorLoader(this, uri, null, null, null, null);
}
@Override
public void onLoadFinished(@NonNull Loader loader, Object data) {
Cursor cursor = (Cursor) data;
this.onLoadFinished1(loader, cursor);
}
public void onLoadFinished1( Loader arg0, Cursor arg1) {
int locationCount = 0;
double lat=0;
double lng=0;
float zoom=0;
// Number of locations available in the SQLite database table
locationCount = arg1.getCount();
// Move the current record pointer to the first row of the table
arg1.moveToFirst();
for(int i=0;i<locationCount;i++){
// Get the latitude
lat = arg1.getDouble(arg1.getColumnIndex(LocationsDB.FIELD_LAT));
// Get the longitude
lng = arg1.getDouble(arg1.getColumnIndex(LocationsDB.FIELD_LNG));
// Get the zoom level
zoom = arg1.getFloat(arg1.getColumnIndex(LocationsDB.FIELD_ZOOM));
// Creating an instance of LatLng to plot the location in Google Maps
LatLng location = new LatLng(lat, lng);
// Drawing the marker in the Google Maps
drawMarker(location);
// Traverse the pointer to the next row
arg1.moveToNext();
}
if(locationCount>0){
// Moving CameraPosition to last clicked position
googleMap.moveCamera(CameraUpdateFactory.newLatLng(new LatLng(lat,lng)));
// Setting the zoom level in the map on last position is clicked
googleMap.animateCamera(CameraUpdateFactory.zoomTo(zoom));
}
}
public void onLoaderReset(Loader arg0) {
// TODO Auto-generated method stub
}
public void onClick_CS(View v) {
googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_CS, 18);
googleMap.animateCamera(update);
}
public void onClick_Univ(View v) {
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_UNIV, 14);
googleMap.animateCamera(update);
}
public void onClick_City(View v) {
googleMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_UNIV, 10);
googleMap.animateCamera(update);
}
}
LocationsDB.java
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class LocationsDB extends SQLiteOpenHelper{
/** Database name */
private static String DBNAME = "locationmarkersqlite";
/** Version number of the database */
private static int VERSION = 1;
/** Field 1 of the table locations, which is the primary key */
public static final String FIELD_ROW_ID = "_id";
/** Field 2 of the table locations, stores the latitude */
public static final String FIELD_LAT = "lat";
/** Field 3 of the table locations, stores the longitude*/
public static final String FIELD_LNG = "lng";
/** Field 4 of the table locations, stores the zoom level of map*/
public static final String FIELD_ZOOM = "zom";
/** A constant, stores the the table name */
private static final String DATABASE_TABLE = "locations";
/** An instance variable for SQLiteDatabase */
private SQLiteDatabase mDB;
/** Constructor */
public LocationsDB(Context context) {
super(context, DBNAME, null, VERSION);
this.mDB = getWritableDatabase();
}
/** This is a callback method, invoked when the method getReadableDatabase() / getWritableDatabase() is called
* provided the database does not exists
* */
@Override
public void onCreate(SQLiteDatabase db) {
String sql = "create table " + DATABASE_TABLE + " ( " +
FIELD_ROW_ID + " integer primary key autoincrement , " +
FIELD_LNG + " double , " +
FIELD_LAT + " double , " +
FIELD_ZOOM + " text " +
" ) ";
db.execSQL(sql);
}
/** Inserts a new location to the table locations */
public long insert(ContentValues contentValues){
long rowID = mDB.insert(DATABASE_TABLE, null, contentValues);
return rowID;
}
/** Deletes all locations from the table */
public int del(){
int cnt = mDB.delete(DATABASE_TABLE, null , null);
return cnt;
}
/** Returns all the locations from the table */
public Cursor getAllLocations(){
return mDB.query(DATABASE_TABLE, new String[] { FIELD_ROW_ID, FIELD_LAT , FIELD_LNG, FIELD_ZOOM } , null, null, null, null, null);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
**LocationsContentProvider.java**
import java.sql.SQLException;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.net.Uri;
/** A custom Content Provider to do the database operations */
public class LocationsContentProvider extends ContentProvider{
public static final String PROVIDER_NAME = "";
/** A uri to do operations on locations table. A content provider is identified by its uri */
public static final Uri CONTENT_URI = Uri.parse("content://" + PROVIDER_NAME + "/locations" );
/** Constant to identify the requested operation */
private static final int LOCATIONS = 1;
private static final UriMatcher uriMatcher ;
static {
uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
uriMatcher.addURI(PROVIDER_NAME, "locations", LOCATIONS);
}
/** This content provider does the database operations by this object */
LocationsDB mLocationsDB;
/** A callback method which is invoked when the content provider is starting up */
@Override
public boolean onCreate() {
mLocationsDB = new LocationsDB(getContext());
return true;
}
/** A callback method which is invoked when insert operation is requested on this content provider */
@Override
public Uri insert(Uri uri, ContentValues values) {
long rowID = mLocationsDB.insert(values);
Uri _uri=null;
if(rowID>0){
_uri = ContentUris.withAppendedId(CONTENT_URI, rowID);
}else {
try {
throw new SQLException("Failed to insert : " + uri);
} catch (SQLException e) {
e.printStackTrace();
}
}
return _uri;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}
/** A callback method which is invoked when delete operation is requested on this content provider */
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
int cnt = 0;
cnt = mLocationsDB.del();
return cnt;
}
/** A callback method which is invoked by default content uri */
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
if(uriMatcher.match(uri)==LOCATIONS){
return mLocationsDB.getAllLocations();
}
return null;
}
@Override
public String getType(Uri uri) {
return null;
}
}
**Android Manifest (partial)**
<permission
android:name="edu."".android.mymaps2.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<meta-data android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<uses-permission android:name="edu."".android.example2.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-feature android:name="android.hardware.camera" android:required="true"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<!-- The following two permissions are not required to use
Google Maps Android API v2, but are recommended. -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
>
<uses-library android:name="com.google.android.maps" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />
<activity
android:name="edu."".android.mymaps2.MapsActivity"
android:label="@string/title_activity_maps">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
我收到了不同的错误,如:
java.lang.RuntimeException:执行doInBackground()时出错
/ActivityThread:未能找到的提供程序信息(此处是我的包名)
E/AndroidRuntime:致命异常:AsyncTask#1
原因:java.lang.IllegalArgumentException:未知URL内容
我的代码有什么问题吗?
我认为错误在provider/uri创建中的某个地方
出于隐私原因,我从代码中删除了我的包名,并将其替换为“”
非常感谢!:)
**Maps Activity.Java**
导入android.content.ContentValues;
导入android.database.Cursor;
导入android.net.Uri;
导入android.os.AsyncTask;
导入android.os.Bundle;
导入android.view.Menu;
导入android.view.view;
导入android.widget.Toast;
导入androidx.annotation.NonNull;
导入androidx.fragment.app.FragmentActivity;
导入androidx.loader.app.LoaderManager;
导入androidx.loader.content.CursorLoader;
导入androidx.loader.content.loader;
导入com.google.android.gms.maps.*;
导入com.google.android.gms.maps.model.*;
公共类MapsActivity扩展了FragmentActivity在MapreadyCallback、LoaderManager.LoaderCallbacks上的实现{
私人最终车床位置大学=新车床(37.335371,-121.881050);
私人最终车床位置=新车床(37.333714,-121.881860);
私人谷歌地图谷歌地图;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_映射);
SupportMapFragment mapFragment=(SupportMapFragment)getSupportFragmentManager()
.findFragmentById(R.id.map);
getMapAsync(这个);
}
@凌驾
mapready上的公共无效(谷歌地图谷歌地图){
谷歌地图=谷歌地图;
addMarker(新的MarkerOptions().position(LOCATION_CS).title(“在这里找到我!”);
setOnMapClickListener(新的googleMap.OnMapClickListener(){
@凌驾
公共空区(停车点){
//在地图上画标记
绘图标记(点);
//创建ContentValues的实例
ContentValues ContentValues=新ContentValues();
//设置内容值中的纬度
contentValues.put(位置、字段纬度、点纬度);
//在ContentValue中设置经度
contentValues.put(位置、地点、经度);
//设置缩放内容值
contentValues.put(LocationsDB.FIELD\u ZOOM,googleMap.getCameraPosition().ZOOM);
//创建LocationInsertTask的实例
LocationInsertTask insertTask=新LocationInsertTask();
//将纬度、经度和缩放级别存储到SQLite数据库
insertTask.execute(contentValues);
Toast.makeText(getBaseContext(),“将标记添加到映射中”,Toast.LENGTH_SHORT.show();
}
});
}
私有类LocationInsertTask扩展了AsyncTask{
@凌驾
受保护的Void doInBackground(ContentValues…ContentValues){
/**设置值以将单击的位置插入SQLite数据库*/
getContentResolver().insert(LocationsContentProvider.CONTENT_URI,contentValues[0]);
返回null;
}
}
专用空位标记器(LatLng点){
//创建MarkerOptions的实例
MarkerOptions MarkerOptions=新MarkerOptions();
//设置标记的纬度和经度
标记选项。位置(点);
//在谷歌地图上添加标记
googleMap.addMarker(markerOptions);
}
私有类LocationDeleteTask扩展了AsyncTask{
@凌驾
受保护的Void doInBackground(Void…参数){
/**删除SQLite数据库中存储的所有位置*/
getContentResolver().delete(LocationsContentProvider.CONTENT\u URI,null,null);
返回null;
}
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(R.menu.main,menu);
返回true;
}
@凌驾
公共加载器onCreateLoader(int arg0,
捆绑包arg1){
//内容提供程序位置ContentProvider的Uri
Uri=位置ContentProvider.CONTENT\u Uri;
//从位置表中获取所有行
返回新的游标装入器(this,uri,null,null,null,null);
}
@凌驾
public void onLoadFinished(@NonNull加载程序,对象数据){
游标=(游标)数据;
此.onLoadFinished1(加载器,光标);
}
public void onLoadFinished1(加载器arg0,光标arg1){
int locationCount=0;
双lat=0;
双液化天然气=0;
浮动缩放=0;
//SQLite数据库表中可用的位置数
locationCount=arg1.getCount();
//将当前记录指针移动到表的第一行
arg1.moveToFirst();
对于(int i=0;i0){
//将CameraPosition移动到上次单击的位置
googleMap.moveCamera(CameraUpdateFactory.newLatLng(newLatLng,lat,lng));
//单击“在地图上最后一个位置设置缩放级别”
googleMap.animateCamera(CameraUpdateFactory.zoomTo(zoom));
}
}
公共void onLoaderReset(加载程序arg0){
//TODO自动生成的方法存根
}
点击图标后的公共空白(视图五){
googleMap.setMapType(googleMap.MAP\u TYPE\u地形);
CameraUpdate update=CameraUpdateFactory.newLatLngZoom(位置18);
googleMap.animateCamera(更新);
}
伦敦大学公共空间(视图五){
googleMap.setMapType(googleMap.MAP\u TYPE\u NORMAL);
CameraUpdate update=CameraUpdateFactory.newLatLngZoom(地点大学,14);
谷歌地图。动画美人鱼(upda)