Question

您好我尝试使用ContentProvider（视频和照片）保存不同的文件。但我不知道如何在同一个班级中执行此操作。我试着这样做......

public class MyFileContentProvider extends ContentProvider {

    public static final Uri CONTENT_URI = Uri.parse("content://com.renata.ideary/picture");
    public static final Uri CONTENT_URI_2 = Uri.parse("content://com.renata.ideary/video");

    private static final HashMap<String, String> MIME_TYPES = new HashMap<String, String>();
    private static final HashMap<String, String> MIME_TYPES_2= new HashMap<String, String>();

    static {

        MIME_TYPES.put(".jpg", "image/jpeg");

        MIME_TYPES.put(".jpeg", "image/jpeg");

        MIME_TYPES_2.put(".mp4","video/mp4");

    }

    @Override

    public boolean onCreate() {

        try {

            File mFile = new File(getContext().getFilesDir(), "/picture.jpg");

            if(!mFile.exists()) {

                mFile.createNewFile();

            }
            File mFile2 = new File(getContext().getFilesDir(), "/video.mp4");

            if(!mFile2.exists()) {

                mFile2.createNewFile();

            }

            getContext().getContentResolver().notifyChange(CONTENT_URI, null);
            getContext().getContentResolver().notifyChange(CONTENT_URI_2, null);
            return (true);

        } catch (Exception e) {

            e.printStackTrace();

            return false;

        }

    }

    @Override

    public String getType(Uri uri) {

        String path = uri.toString();

        for (String extension : MIME_TYPES.keySet()) {

            if (path.endsWith(extension)) {

                return (MIME_TYPES.get(extension));

            }

        }
        for (String extension : MIME_TYPES_2.keySet()) {

            if (path.endsWith(extension)) {

                return (MIME_TYPES_2.get(extension));

            }

        }
        return (null);

    }

    @Override

    public ParcelFileDescriptor openFile(Uri uri, String mode)

    throws FileNotFoundException {

        if (uri.equals(CONTENT_URI)) {
            File f = new File(getContext().getFilesDir(), "/picture.jpg");

            if (f.exists()) {

                return (ParcelFileDescriptor.open(f,

                        ParcelFileDescriptor.MODE_READ_WRITE));

            }

            throw new FileNotFoundException(uri.getPath());
        }
        else {
            File f2 = new File(getContext().getFilesDir(), "/video.mp4");

            if (f2.exists()) {

                return (ParcelFileDescriptor.open(f2,

                        ParcelFileDescriptor.MODE_READ_WRITE));

            }

            throw new FileNotFoundException(uri.getPath());
        }
    }

    @Override

    public Cursor query(Uri url, String[] projection, String selection,

                        String[] selectionArgs, String sort) {

        throw new RuntimeException("Operation not supported");

    }

    @Override

    public Uri insert(Uri uri, ContentValues initialValues) {

        throw new RuntimeException("Operation not supported");

    }

    @Override

    public int update(Uri uri, ContentValues values, String where,

            String[] whereArgs) {

        throw new RuntimeException("Operation not supported");

    }

    @Override

    public int delete(Uri uri, String where, String[] whereArgs) {

        throw new RuntimeException("Operation not supported");

    }

}

但总是告诉我同样的错误：

05-06 22：42：37.932 21837-21849 / com.renata.ideary E / JavaBinder：***未捕获的远程异常！（进程之间尚不支持例外。） java.lang.RuntimeException：不支持操作在com.renata.ideary.MyFileContentProvider.query（MyFileContentProvider.java:137）在android.content.ContentProvider.query（ContentProvider.java:980）在android.content.ContentProvider $ Transport.query（ContentProvider.java:213）在android.content.ContentProviderNative.onTransact（ContentProviderNative.java:112）在android.os.Binder.execTransact（Binder.java:446）

有人可以帮帮我吗？感谢

PD：保存我的视频，但出现了这个错误：（

内容提供商的问题（视频和照片）

0 个答案: