添加了默认书源导入，手动导入有点点麻烦

[rangerzhou]

------------ app/src/main/assets/booksource/DefaultBookSources.txt ------------
new file mode 100644
index 000000000..60ce48a45
@@ -0,0 +1,4 @@
+https://gitee.com/gekunfei/web/raw/master/myBookshelf/xc1772006
+https://gedoor.github.io/MyBookshelf/bookSource.json
+https://bookSources.github.io
+https://blackholep.github.io/20190815set1
\ No newline at end of file

------------------ app/src/main/assets/booksource/URLList.txt ------------------
new file mode 100644
index 000000000..401e94dc1
@@ -0,0 +1 @@
+https://moonbegonia.github.io/Source/
\ No newline at end of file

- app/src/main/java/com/kunfei/bookshelf/view/activity/BookSourceActivity.java -
index c1e0d56ce..d30994bc1 100644
@@ -42,6 +42,9 @@ import com.kunfei.bookshelf.view.adapter.BookSourceAdapter;
 import com.kunfei.bookshelf.widget.filepicker.picker.FilePicker;
 import com.kunfei.bookshelf.widget.modialog.InputDialog;

+import java.io.BufferedReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -292,6 +295,9 @@ public class BookSourceActivity extends MBaseActivity<BookSourceContract.Present
             case R.id.action_import_book_source_rwm:
                 scanBookSource();
                 break;
+            case R.id.action_import_book_source_default:
+                importBookSourceDefault();
+                break;
             case R.id.action_revert_selection:
                 revertSelection();
                 break;
@@ -423,6 +429,20 @@ public class BookSourceActivity extends MBaseActivity<BookSourceContract.Present
                 }).show();
     }

+    private void importBookSourceDefault() {
+        try {
+            String line;
+            InputStream open = this.getResources().getAssets().open("booksource/DefaultBookSources.txt");
+            InputStreamReader inputStreamReader = new InputStreamReader(open);
+            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
+            while ((line = bufferedReader.readLine()) != null && line.length() > 0) {
+                mPresenter.importBookSource(line);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
     private void selectFileSys() {
         Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
         intent.addCategory(Intent.CATEGORY_OPENABLE);