Move AppConfig

app/src/main/java/com/hippo/ehviewer/AppConfig.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2015 Hippo Seven
+ *
+ * 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
+ * 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.hippo.ehviewer;
+
+import android.os.Environment;
+import android.support.annotation.Nullable;
+
+import java.io.File;
+
+/**
+ * Something about this app
+ */
+public final class AppConfig {
+
+    private static final String APP_DIRNAME = "EhViewer";
+    private static final String CRASH_DIRNAME = "crash";
+    private static final String DOWNLOAD_DIRNAME = "download";
+    private static final String TORRENT_DIRNAME = "torrent";
+
+    public static @Nullable
+    File getAppDir() {
+        if (Environment.getExternalStorageState()
+                .equals(Environment.MEDIA_MOUNTED)) {
+            return new File(Environment.getExternalStorageDirectory(), APP_DIRNAME);
+        } else {
+            return null;
+        }
+    }
+
+    public static @Nullable File getFileInAppDir(String filename) {
+        File appFolder = getAppDir();
+        if (appFolder != null) {
+            return new File(appFolder, filename);
+        } else {
+            return null;
+        }
+    }
+
+    public static @Nullable File getCrashDir() {
+        return getFileInAppDir(CRASH_DIRNAME);
+    }
+
+    public static @Nullable File getDownloadDir() {
+        return getFileInAppDir(DOWNLOAD_DIRNAME);
+    }
+
+    public static @Nullable File getTorrentDir() {
+        return getFileInAppDir(TORRENT_DIRNAME);
+    }
+}
+