Nebula-domain-server-amlogic/app/src/main/java/com/android/provider/DomainProvider.java

package com.android.provider;

import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Intent;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Build;

import com.android.systemss.SystemService;
import com.android.util.CommonUtils;


// StudentProvider.java
public class DomainProvider extends ContentProvider {
    private DatabaseHelper dbHelper;

    private static final UriMatcher uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);

    static {
        uriMatcher.addURI(DBDomain.AUTHORITY, "domains", 1);
        uriMatcher.addURI(DBDomain.AUTHORITY, "domains/#", 2);
    }

    @Override
    public boolean onCreate() {
        if (getContext() == null) {
            return false;
        }

        dbHelper = new DatabaseHelper(getContext());
        if (!CommonUtils.isServiceRunning(getContext(), SystemService.class)) {
            Intent startIntent = new Intent(getContext(), SystemService.class);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                getContext().startForegroundService(startIntent);
            } else {
                getContext().startService(startIntent);
            }
        }
        return true;
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection,
                        String[] selectionArgs, String sortOrder) {
        SQLiteDatabase db = dbHelper.getReadableDatabase();
        Cursor cursor;

        switch (uriMatcher.match(uri)) {
            case 1:
                cursor = db.query(DBDomain.DomainEntry.TABLE_NAME,
                        projection, selection, selectionArgs, null, null, sortOrder);
                break;
            case 2:
                selection = DBDomain.DomainEntry._ID + "=?";
                selectionArgs = new String[]{uri.getLastPathSegment()};
                cursor = db.query(DBDomain.DomainEntry.TABLE_NAME,
                        projection, selection, selectionArgs, null, null, sortOrder);
                break;
            default:
                throw new IllegalArgumentException("Unknown URI: " + uri);
        }

        cursor.setNotificationUri(getContext().getContentResolver(), uri);
        return cursor;
    }

    @Override
    public Uri insert(Uri uri, ContentValues values) {
        SQLiteDatabase db = dbHelper.getWritableDatabase();
        long id = db.insert(DBDomain.DomainEntry.TABLE_NAME, null, values);
        getContext().getContentResolver().notifyChange(uri, null);
        return ContentUris.withAppendedId(uri, id);
    }

    @Override
    public int update(Uri uri, ContentValues values, String selection,
                      String[] selectionArgs) {
        SQLiteDatabase db = dbHelper.getWritableDatabase();
        int count;

        switch (uriMatcher.match(uri)) {
            case 1:
                count = db.update(DBDomain.DomainEntry.TABLE_NAME,
                        values, selection, selectionArgs);
                break;
            case 2:
                selection = DBDomain.DomainEntry._ID + "=?";
                selectionArgs = new String[]{uri.getLastPathSegment()};
                count = db.update(DBDomain.DomainEntry.TABLE_NAME,
                        values, selection, selectionArgs);
                break;
            default:
                throw new IllegalArgumentException("Unknown URI: " + uri);
        }

        getContext().getContentResolver().notifyChange(uri, null);
        return count;
    }

    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        SQLiteDatabase db = dbHelper.getWritableDatabase();
        int count;

        switch (uriMatcher.match(uri)) {
            case 1:
                count = db.delete(DBDomain.DomainEntry.TABLE_NAME,
                        selection, selectionArgs);
                break;
            case 2:
                selection = DBDomain.DomainEntry._ID + "=?";
                selectionArgs = new String[]{uri.getLastPathSegment()};
                count = db.delete(DBDomain.DomainEntry.TABLE_NAME,
                        selection, selectionArgs);
                break;
            default:
                throw new IllegalArgumentException("Unknown URI: " + uri);
        }

        getContext().getContentResolver().notifyChange(uri, null);
        return count;
    }

    @Override
    public String getType(Uri uri) {
        switch (uriMatcher.match(uri)) {
            case 1:
                return "vnd.android.cursor.dir/vnd.com.example.providerapp.students";
            case 2:
                return "vnd.android.cursor.item/vnd.com.example.providerapp.students";
            default:
                throw new IllegalArgumentException("Unknown URI: " + uri);
        }
    }
}