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package com.classicube;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.Context;
import android.content.pm.ProviderInfo;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.net.Uri;
import android.os.ParcelFileDescriptor;
import android.provider.MediaStore;
import android.provider.OpenableColumns;
public class CCFileProvider extends ContentProvider
{
final static String[] DEFAULT_COLUMNS = { OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE, MediaStore.MediaColumns.DATA };
File root;
@Override
public boolean onCreate() {
return true;
}
@Override
public void attachInfo(Context context, ProviderInfo info) {
super.attachInfo(context, info);
root = context.getExternalFilesDir(null); // getGameDataDirectory
}
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
File file = getFileForUri(uri);
// can be null when caller is requesting all columns
if (projection == null) projection = DEFAULT_COLUMNS;
ArrayList<String> cols = new ArrayList<String>(3);
ArrayList<Object> vals = new ArrayList<Object>(3);
for (String column : projection) {
if (column.equals(OpenableColumns.DISPLAY_NAME)) {
cols.add(OpenableColumns.DISPLAY_NAME);
vals.add(file.getName());
} else if (column.equals(OpenableColumns.SIZE)) {
cols.add(OpenableColumns.SIZE);
vals.add(file.length());
} else if (column.equals(MediaStore.MediaColumns.DATA)) {
cols.add(MediaStore.MediaColumns.DATA);
vals.add(file.getAbsolutePath());
}
}
// https://stackoverflow.com/questions/4042434/converting-arrayliststring-to-string-in-java
MatrixCursor cursor = new MatrixCursor(cols.toArray(new String[0]), 1);
cursor.addRow(vals.toArray());
return cursor;
}
@Override
public String getType(Uri uri) {
String path = uri.getEncodedPath();
int sepExt = path.lastIndexOf('.');
if (sepExt >= 0) {
String fileExt = path.substring(sepExt);
if (fileExt.equals(".png")) return "image/png";
}
return "application/octet-stream";
}
@Override
public Uri insert(Uri uri, ContentValues values) {
throw new UnsupportedOperationException("Readonly access");
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
throw new UnsupportedOperationException("Readonly access");
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
throw new UnsupportedOperationException("Readonly access");
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
File file = getFileForUri(uri);
return ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
}
public static Uri getUriForFile(String path) {
// See AndroidManifest.xml for authority
return new Uri.Builder()
.scheme("content")
.authority("com.classicube.android.client.provider")
.encodedPath(Uri.encode(path, "/"))
.build();
}
File getFileForUri(Uri uri) {
String path = uri.getPath();
File file = new File(root, path);
file = file.getAbsoluteFile();
// security validation check
if (!file.getPath().startsWith(root.getPath())) {
throw new SecurityException("Resolved path lies outside app directory:" + path);
}
return file;
}
}
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