Java CursorLoader类代码示例

import android.content.CursorLoader; //导入依赖的package包/类
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
    // Now create and return a CursorLoader that will take care of
    // creating a Cursor for the data being displayed.
    if(id == LOADER_ID_HISTORY) {
        return new CursorLoader(this, ActivityDiaryContract.Diary.CONTENT_URI,
                PROJECTION, SELECTION, null, null);
    }else{

        return new CursorLoader(HistoryActivity.this,
                ActivityDiaryContract.DiaryImage.CONTENT_URI,
                new String[] {ActivityDiaryContract.DiaryImage._ID,
                        ActivityDiaryContract.DiaryImage.URI},
                ActivityDiaryContract.DiaryImage.DIARY_ID + "=? AND "
                        + ActivityDiaryContract.DiaryImage._DELETED + "=0",
                new String[] {Long.toString(args.getLong("DiaryID"))},
                null);
    }
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Override
public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
    return new CursorLoader(this,
            // Retrieve data rows for the device user's 'profile' contact.
            Uri.withAppendedPath(ContactsContract.Profile.CONTENT_URI,
                    ContactsContract.Contacts.Data.CONTENT_DIRECTORY), ProfileQuery.PROJECTION,

            // Select only email addresses.
            ContactsContract.Contacts.Data.MIMETYPE +
                    " = ?", new String[]{ContactsContract.CommonDataKinds.Email
            .CONTENT_ITEM_TYPE},

            // Show primary email addresses first. Note that there won't be
            // a primary email address if the user hasn't specified one.
            ContactsContract.Contacts.Data.IS_PRIMARY + " DESC");
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@SuppressLint("NewApi")
public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
    String[] proj = { MediaStore.Images.Media.DATA };
    String result = null;

    CursorLoader cursorLoader = new CursorLoader(
            context,
            contentUri, proj, null, null, null);
    Cursor cursor = cursorLoader.loadInBackground();

    if(cursor != null){
        int column_index =
                cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        result = cursor.getString(column_index);
    }
    return result;
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {

    String[] projection = {
            PetEntry._ID,
            PetEntry.COLUMN_NAME,
            PetEntry.COLUMN_BREED
    };

    return new CursorLoader(
            this,
            PetEntry.CONTENT_URI,
            projection,
            null,
            null,
            null);
}
 

import android.content.CursorLoader; //导入依赖的package包/类
/**
 *
 * @param id
 * @param args
 * @return
 */
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {

    String[] projection = {
            PetEntry._ID,
            PetEntry.COLUMN_NAME,
            PetEntry.COLUMN_BREED,
            PetEntry.COLUMN_GENDER,
            PetEntry.COLUMN_WEIGHT
    };

    return new CursorLoader(
            this,
            uriCurrentPet,
            projection,
            null,
            null,
            null);
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Override
public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {

    return new CursorLoader(this,
            // Retrieve data rows for the device user's 'profile' contact.
            Uri.withAppendedPath(ContactsContract.Profile.CONTENT_URI,
                    ContactsContract.Contacts.Data.CONTENT_DIRECTORY), ProfileQuery.PROJECTION,

            // Select only email addresses.
            ContactsContract.Contacts.Data.MIMETYPE +
                    " = ?", new String[]{ContactsContract.CommonDataKinds.Email
            .CONTENT_ITEM_TYPE},

            // Show primary email addresses first. Note that there won't be
            // a primary email address if the user hasn't specified one.
            ContactsContract.Contacts.Data.IS_PRIMARY + " DESC");
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
    //指定获取_id和display_name两列数据，display_name即为姓名
    String[] projection = new String[]{
            ContactsContract.Contacts._ID,
            ContactsContract.Contacts.DISPLAY_NAME
    };
    CursorLoader loader = new CursorLoader(
            context,
            ContactsContract.Contacts.CONTENT_URI,
            projection,
            null,
            null,
            null
    );
    return loader;
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Test
public void createCursorLoader_SessionQuery_Success() {
    // Given a mock cursor loader set up for a session query
    int sessionsLoaderId = SessionFeedbackModel.SessionFeedbackQueryEnum.SESSION.getId();

    CursorLoader mockCursorLoaderSession = mock(CursorLoader.class);

    SessionFeedbackModel spyModel = spy(
            new SessionFeedbackModel(mMockUri, mMockContext, mMockFeedbackHelper));

    doReturn(mockCursorLoaderSession).when(spyModel).getCursorLoaderInstance(
            any(Context.class), any(Uri.class), any(String[].class), any(String.class),
            any(String[].class), any(String.class));

    // When ran with the session query
    CursorLoader createdCursorLoader1 =
            (CursorLoader) spyModel.createCursorLoader(sessionsLoaderId, mMockUri, null);

    // Then the returned cursor loader is the same as the mock one
    assertThat(createdCursorLoader1, sameInstance(mockCursorLoaderSession));
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Test
public void createCursorLoader_SpeakersQuery_ReturnsCursor() {
    // Given a mock uri and mock cursor loader
    SessionDetailModel spyModel = spy(
            new SessionDetailModel(mMockUri, mMockContext, mMockSessionsHelper));
    doReturn(mMockUri).when(spyModel).getSpeakersDirUri(any(String.class));
    doReturn(mMockCursorLoader).when(spyModel).getCursorLoaderInstance(
            any(Context.class), any(Uri.class), any(String[].class), any(String.class),
            any(String[].class), any(String.class));

    // When ran with mock uri and speakers query loader id
    CursorLoader createdCursorLoader =
            (CursorLoader) spyModel.createCursorLoader(
                    SessionDetailModel.SessionDetailQueryEnum.SPEAKERS.getId(),
                    mMockUri, null);

    // Then the returned cursor loader is the mock cursor loader
    assertThat(createdCursorLoader, sameInstance(mMockCursorLoader));
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Test
public void createCursorLoader_FeedbackQuery_ReturnsCursor() {
    // Given a mock uri and mock cursor loader
    SessionDetailModel spyModel = spy(
            new SessionDetailModel(mMockUri, mMockContext, mMockSessionsHelper));
    doReturn(mMockUri).when(spyModel).getFeedbackUri(any(String.class));
    doReturn(mMockCursorLoader).when(spyModel).getCursorLoaderInstance(
            any(Context.class), any(Uri.class), any(String[].class), any(String.class),
            any(String[].class), any(String.class));

    // When ran with mock uri and feedback query loader id
    CursorLoader createdCursorLoader =
            (CursorLoader) spyModel.createCursorLoader(
                    SessionDetailModel.SessionDetailQueryEnum.FEEDBACK.getId(),
                    mMockUri, null);

    // Then the returned cursor loader is the mock cursor loader
    assertThat(createdCursorLoader, sameInstance(mMockCursorLoader));
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Test
public void createCursorLoader_FilteredVideosQuery_Success() {
    // Given a mock cursor loader set up for a video query
    int videosLoaderId = VideoLibraryModel.VideoLibraryQueryEnum.VIDEOS.getId();

    when(mMockBundle.containsKey(VideoLibraryModel.KEY_TOPIC)).thenReturn(true);
    when(mMockBundle.containsKey(VideoLibraryModel.KEY_YEAR)).thenReturn(true);
    when(mMockBundle.getString(VideoLibraryModel.KEY_TOPIC)).thenReturn("Android");
    when(mMockBundle.getInt(VideoLibraryModel.KEY_YEAR)).thenReturn(2012);

    // When ran with the video query
    CursorLoader createdCursorLoader =
            (CursorLoader) mSpyModel.createCursorLoader(videosLoaderId, Uri.EMPTY, mMockBundle);

    // Then the returned cursor loader is the same as the mock one
    assertThat(createdCursorLoader, sameInstance(mMockCursorLoader));
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@SuppressLint("NewApi")
public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
    String[] proj = { MediaStore.Images.Media.DATA };
    String result = null;

    try {
        CursorLoader cursorLoader = new CursorLoader(context, contentUri, proj, null, null, null);
        Cursor cursor = cursorLoader.loadInBackground();

        if (cursor != null) {
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            result = cursor.getString(column_index);
        }
    } catch (Exception e) {
        result = null;
    }
    return result;
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Override
public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
    return new CursorLoader(this,
            // Retrieve data rows for the device user's 'profile' contact.
            Uri.withAppendedPath(ContactsContract.Profile.CONTENT_URI,
                    ContactsContract.Contacts.Data.CONTENT_DIRECTORY), RegisterActivity.ProfileQuery.PROJECTION,

            // Select only email addresses.
            ContactsContract.Contacts.Data.MIMETYPE +
                    " = ?", new String[]{ContactsContract.CommonDataKinds.Email
            .CONTENT_ITEM_TYPE},

            // Show primary email addresses first. Note that there won't be
            // a primary email address if the user hasn't specified one.
            ContactsContract.Contacts.Data.IS_PRIMARY + " DESC");
}
 

import android.content.CursorLoader; //导入依赖的package包/类
public Loader<Cursor> onCreateLoader(int loaderID, Bundle bundle) {
    if (loaderID == mLoaderManagerId && (mUri != null || mVideoId != -1)) {
        String selection = (mVideoId != -1 ? BaseColumns._ID : MediaColumns.DATA) + "=?";
        if(LoaderUtils.mustHideUserHiddenObjects())
            selection += " AND "+LoaderUtils.HIDE_USER_HIDDEN_FILTER;
        CursorLoader cursorLoader =  new CursorLoader(
                mContext,
                VideoStore.Video.Media.EXTERNAL_CONTENT_URI,
                VideoDbInfo.COLUMNS,selection
                 ,
                new String [] {(mVideoId != -1 ? String.valueOf(mVideoId) : mUri.toString())},
                null);
        if(mLoaderManager==null)
            cursorLoader.registerListener(loaderID, this);
        return cursorLoader;
    }
    return null;
}
 

import android.content.CursorLoader; //导入依赖的package包/类
@Override
public android.support.v4.content.Loader<Cursor> onCreateLoader(int id, Bundle args) {
    return new android.support.v4.content.CursorLoader( mContext,
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
            IMAGE_PROJECTION,
            "",
            null,
            IMAGE_PROJECTION[2] + " DESC");
}