1 files changed, 155 insertions, 0 deletions
diff --git a/TestMediaApp/src/com/android/car/media/testmediaapp/TmaPublicProvider.java b/TestMediaApp/src/com/android/car/media/testmediaapp/TmaPublicProvider.java
new file mode 100644
index 0000000..e7eb31b
--- /dev/null
+++ b/TestMediaApp/src/com/android/car/media/testmediaapp/TmaPublicProvider.java
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2019, 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.android.car.media.testmediaapp;
+
+import android.content.ContentProvider;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.res.AssetFileDescriptor;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.text.TextUtils;
+import android.util.Log;
+
+import com.android.car.media.testmediaapp.prefs.TmaPrefs;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class TmaPublicProvider extends ContentProvider {
+
+    private static final String TAG = "TmaAssetProvider";
+
+    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
+
+    private static final String AUTHORITY = "com.android.car.media.testmediaapp.public";
+
+    private static final String FILES = "/files/";
+    private static final String ASSETS = "/assets/";
+
+    private static final String CONTENT_URI_PREFIX =
+            ContentResolver.SCHEME_CONTENT + "://" + AUTHORITY + "/";
+
+    private static final String RESOURCE_URI_PREFIX =
+            ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + AUTHORITY + "/";
+
+
+    public static String buildUriString(String localArt) {
+        String prefix = localArt.startsWith("drawable") ? RESOURCE_URI_PREFIX : CONTENT_URI_PREFIX;
+        return prefix + localArt;
+    }
+
+    private int mAssetDelay = 0;
+
+
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
+        String path = uri.getPath();
+
+        if (TextUtils.isEmpty(path) || !path.startsWith(FILES)) {
+            throw new FileNotFoundException(path);
+        }
+
+        Log.i(TAG, "TmaAssetProvider#openFile uri: " + uri + " path: " + path);
+
+        File localFile = new File(getContext().getFilesDir(), path);
+        if (!localFile.exists()) {
+            downloadFile(localFile, path.substring(FILES.length()));
+        }
+
+        return ParcelFileDescriptor.open(localFile,ParcelFileDescriptor.MODE_READ_ONLY);
+    }
+
+    @Override
+    public AssetFileDescriptor openAssetFile(Uri uri, String mode) throws FileNotFoundException {
+        String path = uri.getPath();
+        if (TextUtils.isEmpty(path) || !path.startsWith(ASSETS)) {
+            // The ImageDecoder and media center code always try to open as asset first, but
+            // super delegates to openFile...
+            return super.openAssetFile(uri, mode);
+        }
+
+        Log.i(TAG, "TmaAssetProvider#openAssetFile uri: " + uri + " path: " + path);
+
+        try {
+            Thread.sleep(mAssetDelay + (int)(mAssetDelay * (Math.random())));
+        } catch (InterruptedException ignored) {
+        }
+
+        try {
+            return getContext().getAssets().openFd(path.substring(ASSETS.length()));
+        } catch (IOException e) {
+            Log.e(TAG, "openAssetFile failed: " + e);
+            return null;
+        }
+    }
+
+    private void downloadFile(File localFile, String assetsPath) {
+        try {
+            localFile.getParentFile().mkdirs();
+
+            InputStream input = getContext().getAssets().open(assetsPath);
+            OutputStream output = new FileOutputStream(localFile);
+
+            byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
+            int n;
+            while (-1 != (n = input.read(buffer))) {
+                output.write(buffer, 0, n);
+            }
+
+        } catch (IOException e) {
+            Log.e(TAG, "downloadFile failed: " + e);
+        }
+    }
+
+    @Override
+    public boolean onCreate() {
+        TmaPrefs.getInstance(getContext()).mAssetReplyDelay.registerChangeListener(
+                (oldValue, newValue) -> mAssetDelay = newValue.mReplyDelayMs);
+        return true;
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
+        return null;
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        return null;
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        return null;
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        return 0;
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        return 0;
+    }
+}