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Implement Storage Access Framework

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* re-work finished mission database
* re-work DownloadMission and bump it Serializable version
* keep the classic Java IO API
* SAF Tree API support on Android Lollipop or higher
* add wrapper for SAF stream opening
* implement Closeable in SharpStream to replace the dispose() method

* do required changes for this API:
** remove any file creation logic from DownloadInitializer
** make PostProcessing Serializable and reduce the number of iterations
** update all strings.xml files
** storage helpers: StoredDirectoryHelper & StoredFileHelper
** best effort to handle any kind of SAF errors/exceptions
This commit is contained in:
kapodamy 2019-04-05 14:45:39 -03:00
parent 8d8059229f
commit 7ca7952790
62 changed files with 2439 additions and 1180 deletions
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35
app/src/main/java/us/shandian/giga/get/Mission.java
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@ -1,12 +1,15 @@
package us.shandian.giga.get;
import java.io.File;
import android.net.Uri;
import android.support.annotation.NonNull;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import us.shandian.giga.io.StoredFileHelper;
public abstract class Mission implements Serializable {
private static final long serialVersionUID = 0L;// last bump: 5 october 2018
private static final long serialVersionUID = 1L;// last bump: 27 march 2019
/**
* Source url of the resource
@ -23,28 +26,23 @@ public abstract class Mission implements Serializable {
*/
public long timestamp;
/**
* The filename
*/
public String name;
/**
* The directory to store the download
*/
public String location;
/**
* pre-defined content type
*/
public char kind;
/**
* The downloaded file
*/
public StoredFileHelper storage;
/**
* get the target file on the storage
*
* @return File object
*/
public File getDownloadedFile() {
return new File(location, name);
public Uri getDownloadedFileUri() {
return storage.getUri();
}
/**
@ -53,8 +51,8 @@ public abstract class Mission implements Serializable {
* @return {@code true] if and only if the file is successfully deleted, otherwise, {@code false}
*/
public boolean delete() {
deleted = true;
return getDownloadedFile().delete();
if (storage != null) return storage.delete();
return true;
}
/**
@ -62,10 +60,11 @@ public abstract class Mission implements Serializable {
*/
public transient boolean deleted = false;
@NonNull
@Override
public String toString() {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(timestamp);
return "[" + calendar.getTime().toString() + "] " + location + File.separator + name;
return "[" + calendar.getTime().toString() + "] " + getDownloadedFileUri().getPath();
}
}