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/*
* 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);
}
}
}
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