Convert PubkeyListActivity, PortFowardListActivity, and HostListActivity to AppCompat, using AppCompatListActivity superclass

1 files changed, 108 insertions, 0 deletions

diff --git a/app/src/main/java/org/connectbot/AppCompatListActivity.java b/app/src/main/java/org/connectbot/AppCompatListActivity.java
new file mode 100644
index 0000000..6eb406d
--- /dev/null
+++ b/app/src/main/java/org/connectbot/AppCompatListActivity.java
@@ -0,0 +1,108 @@
+/*
+ * ConnectBot: simple, powerful, open-source SSH client for Android
+ * Copyright 2015 Kenny Root, Jeffrey Sharkey
+ *
+ * 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 org.connectbot;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+
+public class AppCompatListActivity extends AppCompatActivity {
+	protected ItemAdapter mAdapter;
+
+	protected View mEmptyView;
+	protected RecyclerView mListView;
+
+	/**
+	 * If the list is empty, hides the list and shows the empty message; otherwise, shows
+	 * the list and hides the empty message.
+	 */
+	protected void adjustViewVisibility() {
+		boolean isEmpty = mAdapter.getItemCount() == 0;
+		mListView.setVisibility(isEmpty ? View.GONE : View.VISIBLE);
+		mEmptyView.setVisibility(isEmpty ? View.VISIBLE : View.GONE);
+	}
+
+	/**
+	 * Item decorations for list items, which adds a divider between items and leaves a
+	 * small offset at the top of the list to adhere to the Material Design spec.
+	 */
+	protected class ListItemDecoration extends RecyclerView.ItemDecoration {
+		private final int[] ATTRS = new int[] { android.R.attr.listDivider };
+
+		private final int TOP_LIST_OFFSET = 8;
+
+		private Drawable mDivider;
+
+		public ListItemDecoration(Context c) {
+			final TypedArray a = c.obtainStyledAttributes(ATTRS);
+			mDivider = a.getDrawable(0);
+			a.recycle();
+		}
+
+		@Override
+		public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
+			final int left = parent.getPaddingLeft();
+			final int right = parent.getWidth() - parent.getPaddingRight();
+
+			final int childCount = parent.getChildCount();
+			for (int i = 0; i < childCount; i++) {
+				final View child = parent.getChildAt(i);
+				final RecyclerView.LayoutParams params =
+						(RecyclerView.LayoutParams) child.getLayoutParams();
+				final int top = child.getBottom() + params.bottomMargin;
+				final int bottom = top + mDivider.getIntrinsicHeight();
+				mDivider.setBounds(left, top, right, bottom);
+				mDivider.draw(c);
+			}
+		}
+
+		@Override
+		public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
+				RecyclerView.State state) {
+			int top = parent.getChildAdapterPosition(view) == 0 ? TOP_LIST_OFFSET : 0;
+			outRect.set(0, top, 0, mDivider.getIntrinsicHeight());
+		}
+	}
+
+	protected abstract class ItemViewHolder extends RecyclerView.ViewHolder
+			implements View.OnClickListener, View.OnCreateContextMenuListener {
+		public ItemViewHolder(View v) {
+			super(v);
+			v.setOnClickListener(this);
+			v.setOnCreateContextMenuListener(this);
+		}
+	}
+
+	@VisibleForTesting
+	protected static abstract class ItemAdapter extends RecyclerView.Adapter<ItemViewHolder> {
+		private final LayoutInflater inflater;
+		protected final Context context;
+
+		public ItemAdapter(Context context/*, List<AbstractBean> items*/) {
+			this.context = context;
+			this.inflater = LayoutInflater.from(context);
+		}
+	}
+}