Android sample: RecyclerViewSample
Update to RecyclerViewSample to include use of GridLayoutManager
and log onClick events.
Change-Id: I6872a1d4a55efeb738336a48ed605ff1e4ad0970
diff --git a/ui/views/RecyclerView/Application/src/main/java/com/example/android/recyclerview/CustomAdapter.java b/ui/views/RecyclerView/Application/src/main/java/com/example/android/recyclerview/CustomAdapter.java
index f8e3bae..40f9375 100644
--- a/ui/views/RecyclerView/Application/src/main/java/com/example/android/recyclerview/CustomAdapter.java
+++ b/ui/views/RecyclerView/Application/src/main/java/com/example/android/recyclerview/CustomAdapter.java
@@ -34,21 +34,29 @@
// BEGIN_INCLUDE(recyclerViewSampleViewHolder)
/**
- * Provide a reference to the type of views that you are using (custom viewholder)
+ * Provide a reference to the type of views that you are using (custom ViewHolder)
*/
public static class ViewHolder extends RecyclerView.ViewHolder {
- private final TextView mTextView;
+ private final TextView textView;
public ViewHolder(View v) {
super(v);
- mTextView = (TextView) v.findViewById(R.id.textView);
+ // Define click listener for the ViewHolder's View.
+ v.setOnClickListener(new View.OnClickListener() {
+ @Override
+ public void onClick(View v) {
+ Log.d(TAG, "Element " + getPosition() + " clicked.");
+ }
+ });
+ textView = (TextView) v.findViewById(R.id.textView);
}
- public TextView getmTextView() {
- return mTextView;
+ public TextView getTextView() {
+ return textView;
}
}
// END_INCLUDE(recyclerViewSampleViewHolder)
+
/**
* Initialize the dataset of the Adapter.
*
@@ -61,25 +69,24 @@
// BEGIN_INCLUDE(recyclerViewOnCreateViewHolder)
// Create new views (invoked by the layout manager)
@Override
- public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int position) {
+ public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
// Create a new view.
View v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.text_row_item, viewGroup, false);
- ViewHolder vh = new ViewHolder(v);
- return vh;
+ return new ViewHolder(v);
}
// END_INCLUDE(recyclerViewOnCreateViewHolder)
// BEGIN_INCLUDE(recyclerViewOnBindViewHolder)
// Replace the contents of a view (invoked by the layout manager)
@Override
- public void onBindViewHolder(ViewHolder viewHolder, int position) {
+ public void onBindViewHolder(ViewHolder viewHolder, final int position) {
Log.d(TAG, "Element " + position + " set.");
// Get element from your dataset at this position and replace the contents of the view
// with that element
- viewHolder.getmTextView().setText(mDataSet[position]);
+ viewHolder.getTextView().setText(mDataSet[position]);
}
// END_INCLUDE(recyclerViewOnBindViewHolder)
diff --git a/ui/views/RecyclerView/Application/src/main/java/com/example/android/recyclerview/RecyclerViewFragment.java b/ui/views/RecyclerView/Application/src/main/java/com/example/android/recyclerview/RecyclerViewFragment.java
index 4f4a596..019657f 100644
--- a/ui/views/RecyclerView/Application/src/main/java/com/example/android/recyclerview/RecyclerViewFragment.java
+++ b/ui/views/RecyclerView/Application/src/main/java/com/example/android/recyclerview/RecyclerViewFragment.java
@@ -18,21 +18,37 @@
import android.os.Bundle;
import android.support.v4.app.Fragment;
+import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
+import android.widget.RadioButton;
/**
- * Demonstrates the use of RecyclerView with a LinearLayoutManager.
+ * Demonstrates the use of {@link RecyclerView} with a {@link LinearLayoutManager} and a
+ * {@link GridLayoutManager}.
*/
public class RecyclerViewFragment extends Fragment {
private static final String TAG = "RecyclerViewFragment";
+ private static final String KEY_LAYOUT_MANAGER = "layoutManager";
+ private static final int SPAN_COUNT = 2;
+ private static final int DATASET_COUNT = 60;
+
+ private enum LayoutManagerType {
+ GRID_LAYOUT_MANAGER,
+ LINEAR_LAYOUT_MANAGER
+ }
+
+ protected LayoutManagerType mCurrentLayoutManagerType;
+
+ protected RadioButton mLinearLayoutRadioButton;
+ protected RadioButton mGridLayoutRadioButton;
protected RecyclerView mRecyclerView;
- protected RecyclerView.Adapter mAdapter;
+ protected CustomAdapter mAdapter;
protected RecyclerView.LayoutManager mLayoutManager;
protected String[] mDataset;
@@ -58,23 +74,86 @@
// to the way ListView would layout elements. The RecyclerView.LayoutManager defines how
// elements are laid out.
mLayoutManager = new LinearLayoutManager(getActivity());
- mRecyclerView.setLayoutManager(mLayoutManager);
+
+ mCurrentLayoutManagerType = LayoutManagerType.LINEAR_LAYOUT_MANAGER;
+
+ if (savedInstanceState != null) {
+ // Restore saved layout manager type.
+ mCurrentLayoutManagerType = (LayoutManagerType) savedInstanceState
+ .getSerializable(LAYOUT_MANAGER_KEY);
+ }
+ setRecyclerViewLayoutManager(mCurrentLayoutManagerType);
mAdapter = new CustomAdapter(mDataset);
// Set CustomAdapter as the adapter for RecyclerView.
mRecyclerView.setAdapter(mAdapter);
// END_INCLUDE(initializeRecyclerView)
+ mLinearLayoutRadioButton = (RadioButton) rootView.findViewById(R.id.linear_layout_rb);
+ mLinearLayoutRadioButton.setOnClickListener(new View.OnClickListener() {
+ @Override
+ public void onClick(View v) {
+ setRecyclerViewLayoutManager(LayoutManagerType.LINEAR_LAYOUT_MANAGER);
+ }
+ });
+
+ mGridLayoutRadioButton = (RadioButton) rootView.findViewById(R.id.grid_layout_rb);
+ mGridLayoutRadioButton.setOnClickListener(new View.OnClickListener() {
+ @Override
+ public void onClick(View v) {
+ setRecyclerViewLayoutManager(LayoutManagerType.GRID_LAYOUT_MANAGER);
+ }
+ });
+
return rootView;
}
/**
+ * Set RecyclerView's LayoutManager to the one given.
+ *
+ * @param layoutManagerType Type of layout manager to switch to.
+ */
+ public void setRecyclerViewLayoutManager(LayoutManagerType layoutManagerType) {
+ int scrollPosition = 0;
+
+ // If a layout manager has already been set, get current scroll position.
+ if (mRecyclerView.getLayoutManager() != null) {
+ scrollPosition = ((LinearLayoutManager) mRecyclerView.getLayoutManager())
+ .findFirstCompletelyVisibleItemPosition();
+ }
+
+ switch (layoutManagerType) {
+ case GRID_LAYOUT_MANAGER:
+ mLayoutManager = new GridLayoutManager(getActivity(), SPAN_COUNT);
+ mCurrentLayoutManagerType = LayoutManagerType.GRID_LAYOUT_MANAGER;
+ break;
+ case LINEAR_LAYOUT_MANAGER:
+ mLayoutManager = new LinearLayoutManager(getActivity());
+ mCurrentLayoutManagerType = LayoutManagerType.LINEAR_LAYOUT_MANAGER;
+ break;
+ default:
+ mLayoutManager = new LinearLayoutManager(getActivity());
+ mCurrentLayoutManagerType = LayoutManagerType.LINEAR_LAYOUT_MANAGER;
+ }
+
+ mRecyclerView.setLayoutManager(mLayoutManager);
+ mRecyclerView.scrollToPosition(scrollPosition);
+ }
+
+ @Override
+ public void onSaveInstanceState(Bundle savedInstanceState) {
+ // Save currently selected layout manager.
+ savedInstanceState.putSerializable(LAYOUT_MANAGER_KEY, mCurrentLayoutManagerType);
+ super.onSaveInstanceState(savedInstanceState);
+ }
+
+ /**
* Generates Strings for RecyclerView's adapter. This data would usually come
* from a local content provider or remote server.
*/
private void initDataset() {
- mDataset = new String[60];
- for (int i=0; i < 60; i++) {
+ mDataset = new String[DATASET_COUNT];
+ for (int i = 0; i < DATASET_COUNT; i++) {
mDataset[i] = "This is element #" + i;
}
}
diff --git a/ui/views/RecyclerView/Application/src/main/res/layout/recycler_view_frag.xml b/ui/views/RecyclerView/Application/src/main/res/layout/recycler_view_frag.xml
index 6682468..dda99ce 100644
--- a/ui/views/RecyclerView/Application/src/main/res/layout/recycler_view_frag.xml
+++ b/ui/views/RecyclerView/Application/src/main/res/layout/recycler_view_frag.xml
@@ -15,14 +15,28 @@
limitations under the License.
-->
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
+ <RadioGroup
+ android:layout_width="match_parent"
+ android:layout_height="wrap_content"
+ android:gravity="center_horizontal"
+ android:orientation="horizontal"
+ android:checkedButton="@+id/linear_layout_rb">
+ <RadioButton android:id="@+id/linear_layout_rb"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:text="@string/linear_layout_manager"/>
+ <RadioButton android:id="@+id/grid_layout_rb"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:text="@string/grid_layout_manager"/>
+ </RadioGroup>
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
- android:layout_height="match_parent" />
-
-</FrameLayout>
+ android:layout_height="match_parent"/>
+</LinearLayout>
diff --git a/ui/views/RecyclerView/Application/src/main/res/layout/text_row_item.xml b/ui/views/RecyclerView/Application/src/main/res/layout/text_row_item.xml
index d552e0e..9b94684 100644
--- a/ui/views/RecyclerView/Application/src/main/res/layout/text_row_item.xml
+++ b/ui/views/RecyclerView/Application/src/main/res/layout/text_row_item.xml
@@ -15,17 +15,16 @@
limitations under the License.
-->
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_margin="@dimen/margin_small"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content">
-
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+ android:layout_width="match_parent"
+ android:layout_height="@dimen/list_item_height"
+ android:layout_marginLeft="@dimen/margin_medium"
+ android:layout_marginRight="@dimen/margin_medium"
+ android:gravity="center_vertical">
<TextView
+ android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
- android:text="@string/element_text"
- android:id="@+id/textView"
- android:layout_gravity="center_horizontal"/>
-</LinearLayout>
\ No newline at end of file
+ android:text="@string/element_text"/>
+</FrameLayout>
\ No newline at end of file
diff --git a/ui/views/RecyclerView/Application/src/main/res/values/dimens.xml b/ui/views/RecyclerView/Application/src/main/res/values/dimens.xml
new file mode 100644
index 0000000..5af7e9e
--- /dev/null
+++ b/ui/views/RecyclerView/Application/src/main/res/values/dimens.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2014 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.
+-->
+
+<resources>
+ <dimen name="list_item_height">72dp</dimen>
+</resources>
\ No newline at end of file
diff --git a/ui/views/RecyclerView/Application/src/main/res/values/strings.xml b/ui/views/RecyclerView/Application/src/main/res/values/strings.xml
index 179529c..642e022 100644
--- a/ui/views/RecyclerView/Application/src/main/res/values/strings.xml
+++ b/ui/views/RecyclerView/Application/src/main/res/values/strings.xml
@@ -17,4 +17,6 @@
<resources>
<string name="element_text">Element</string>
+ <string name="grid_layout_manager">Grid Layout Manager</string>
+ <string name="linear_layout_manager">Linear Layout Manager</string>
</resources>
\ No newline at end of file
diff --git a/ui/views/RecyclerView/template-params.xml b/ui/views/RecyclerView/template-params.xml
index 76fbd83..6e616d2 100644
--- a/ui/views/RecyclerView/template-params.xml
+++ b/ui/views/RecyclerView/template-params.xml
@@ -31,11 +31,24 @@
<strings>
<intro>
<![CDATA[
- Demonstration of using RecyclerView with a LayoutManager to create a vertical ListView.
+ Demonstration of using RecyclerView with a LinearLayoutManager and GridLayoutManager
+ to create a vertical list. Tap \"SHOW LOG\" to view elements as they are bound to
+ their ViewHolder. The log also displays elements that you tap.
]]>
</intro>
</strings>
+ <colors>
+ <color>
+ <name>colorPrimary</name>
+ <hexval>#00BCD4</hexval>
+ </color>
+ <color>
+ <name>colorPrimaryDark</name>
+ <hexval>#00838F</hexval>
+ </color>
+ </colors>
+
<template src="base"/>
<template src="FragmentView"/>
<common src="logger"/>
