ContentProvider

PhoneContact

private static final String[] phoneContact = new String[]{
        ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
        ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
        ContactsContract.CommonDataKinds.Phone.NUMBER,
        ContactsContract.CommonDataKinds.Photo.PHOTO_ID};

LoaderManager.getInstance(this).initLoader(0, null, new LoaderCallback());


private class LoaderCallback implements LoaderManager.LoaderCallbacks<Cursor> {
    @Override
    public Loader<Cursor> onCreateLoader(int id, @Nullable Bundle args) {
        Log.i(TAG, "onCreateLoader:" + Thread.currentThread().getName());
        return new CursorLoader(
                ContentProviderBasicActivity.this,
                ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                phoneContact,
                null,
                null,
                ContactsContract.Contacts.DISPLAY_NAME
                        + " COLLATE LOCALIZED ASC");
    }

    @Override
    public void onLoadFinished(@NonNull Loader<Cursor> loader, Cursor data) {
        readDataFromCursor(data);
        Log.i(TAG, "onLoadFinished:" + Thread.currentThread().getName());
    }
    
}

private void readDataFromCursor(Cursor cursor) {
    if (cursor != null) {
        while (cursor.moveToNext()) {
            String name = cursor.getString(
                    cursor.getColumnIndex(
                            ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
            String number = cursor.getString(
                    cursor.getColumnIndex(
                            ContactsContract.CommonDataKinds.Phone.NUMBER));
            Log.i(TAG, name + " : " + number);
        }
    }
}

Cursor phoneCursor = resolver.query(
            ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
            phoneContact,
            ContactsContract.Contacts.DISPLAY_NAME+" = ?",
            new String[]{"A Test"},
            ContactsContract.Contacts.DISPLAY_NAME
                    + " COLLATE LOCALIZED ASC");

More LoaderManager

https://blog.csdn.net/u012514113/article/details/123949911

自定义

public static final String AUTHORITY = "com.example.demoprovider.provider";
private static final Uri AUTHORITY_URI =  Uri.parse("content://" + AUTHORITY);
public static final Uri PERSON_URI =  Uri.withAppendedPath(AUTHORITY_URI,"man");

/**
 *新增数据
 */
private void insert() {
    ContentResolver resolver = this.getContentResolver();
    Uri uri = DemoContract.PERSON_URI;
    ContentValues contentValues = new ContentValues();
    contentValues.put(DemoContract.Person.NAME,"tester");
    contentValues.put(DemoContract.Person.PHONE,"12345678");
    contentValues.put(DemoContract.Person.SEX,"男");
    contentValues.put(DemoContract.Person.AGE,23);
    resolver.insert(uri,contentValues);
}
private void delete() {
    ContentResolver resolver = this.getContentResolver();
    Uri uri = DemoContract.PERSON_URI;
    int count = resolver.delete(uri,
            DemoContract.Person.NAME+" = ?",
            new String[]{"tester"});
    Log.i(TAG, "delete count="+count);
}
private void update() {
    ContentResolver resolver = this.getContentResolver();
    Uri uri = DemoContract.PERSON_URI;
    ContentValues contentValues = new ContentValues();
    contentValues.put(DemoContract.Person.NAME,"nd");
    contentValues.put(DemoContract.Person.PHONE,"28781771728");
    int count = resolver.update(uri,contentValues,
            DemoContract.Person.NAME+" = ?",
            new String[]{"tester"});
    Log.i(TAG, "update count="+count);
}
//query
ContentResolver resolver = this.getContentResolver();
Uri uri = DemoContract.PERSON_URI;
Cursor phoneCursor = resolver.query(
            uri,
            person,
            null,
            null,
            null);
  }
phoneCursor.close();