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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.shareactionprovider.content;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.content.res.AssetManager;
import android.database.Cursor;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.text.TextUtils;
import java.io.FileNotFoundException;
import java.io.IOException;
/**
* A simple ContentProvider which can serve files from this application's assets. The majority of
* functionality is in {@link #openAssetFile(android.net.Uri, String)}.
*/
public class AssetProvider extends ContentProvider {
public static String CONTENT_URI = "com.example.android.actionbarcompat.shareactionprovider";
@Override
public boolean onCreate() {
return true;
}
@Override
public int delete(@NonNull Uri uri, String selection, String[] selectionArgs) {
// Do not support delete requests.
return 0;
}
@Override
public String getType(@NonNull Uri uri) {
// Do not support returning the data type
return null;
}
@Override
public Uri insert(@NonNull Uri uri, ContentValues values) {
// Do not support insert requests.
return null;
}
@Override
public Cursor query(@NonNull Uri uri, String[] projection, String selection,
String[] selectionArgs,
String sortOrder) {
// Do not support query requests.
return null;
}
@Override
public int update(@NonNull Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
// Do not support update requests.
return 0;
}
@Override
public AssetFileDescriptor openAssetFile(@NonNull Uri uri, @NonNull String mode)
throws FileNotFoundException {
// The asset file name should be the last path segment
final String assetName = uri.getLastPathSegment();
// If the given asset name is empty, throw an exception
if (TextUtils.isEmpty(assetName)) {
throw new FileNotFoundException();
}
try {
// Try and return a file descriptor for the given asset name
Context context = getContext();
if (context == null) {
return super.openAssetFile(uri, mode);
}
AssetManager am = context.getAssets();
return am.openFd(assetName);
} catch (IOException e) {
e.printStackTrace();
return super.openAssetFile(uri, mode);
}
}
}
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