Make UniFile actually backed by ParcelFileDescriptor, implement IO stream as extensions, Resolve #896

app/src/main/java/com/hippo/unifile/UniFile.java

@@ -21,6 +21,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Build;
+import android.os.ParcelFileDescriptor;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -29,8 +30,6 @@ import com.hippo.image.Image;
 
 import java.io.File;
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -414,35 +413,9 @@ public abstract class UniFile {
      */
     public abstract boolean renameTo(String displayName);
 
-    /**
-     * Open a stream on to the content associated with the file, clean it if it exists
-     *
-     * @return the {@link OutputStream}
-     * @throws IOException
-     */
-    @NonNull
-    public abstract OutputStream openOutputStream() throws IOException;
-
-    /**
-     * Open a stream on to the content associated with the file
-     *
-     * @param append {@code true} for do not clean it if it exists
-     * @return the {@link OutputStream}
-     * @throws IOException
-     */
-    @NonNull
-    public abstract OutputStream openOutputStream(boolean append) throws IOException;
-
-    /**
-     * Open a stream on to the content associated with the file
-     *
-     * @return the {@link InputStream}
-     * @throws IOException
-     */
-    @NonNull
-    public abstract InputStream openInputStream() throws IOException;
-
-
     @NonNull
     public abstract Image.CloseableSource getImageSource();
+
+    @NonNull
+    public abstract ParcelFileDescriptor openFileDescriptor(@NonNull String mode) throws IOException;
 }