/*
* Copyright (C) 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.
*/
package com.example.android.supportv7.graphics;
import com.example.android.supportv7.R;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.ResourceCursorAdapter;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.graphics.Palette;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.ListView;
/**
* Activity which displays the images from the device's {@link MediaStore}, alongside the generated
* {@link android.support.v7.graphics.Palette} results.
*
* Allows the customization of the number of colors used in the palette generation, to demonstrate
* the difference in results for different types of images.
*/
public class PaletteActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSupportFragmentManager()
.beginTransaction()
.replace(android.R.id.content, new PaletteMediaStoreListFragment())
.commit();
}
/**
* The {@link android.support.v4.app.ListFragment} which does all of the hard work.
*/
public static class PaletteMediaStoreListFragment extends ListFragment
implements LoaderManager.LoaderCallbacks<Cursor> {
/**
* Projection used for querying the {@link android.provider.MediaStore}.
*/
static final String[] PROJECTION = {
MediaStore.Images.ImageColumns._ID,
MediaStore.Images.ImageColumns.DATE_ADDED
};
private PhotosCursorAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
// Enable fast scroll to make it easier to navigate large number of images
getListView().setFastScrollEnabled(true);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Create an Adapter and use a new Adapter
mAdapter = new PhotosCursorAdapter(getActivity(), null);
mAdapter.setNumColors(16);
setListAdapter(mAdapter);
// Start the loader manager to create our CursorLoader
getLoaderManager().initLoader(0, null, this);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.sample_palette_actions, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_num_colors_8:
mAdapter.setNumColors(8);
item.setChecked(true);
return true;
case R.id.menu_num_colors_12:
mAdapter.setNumColors(12);
item.setChecked(true);
return true;
case R.id.menu_num_colors_16:
mAdapter.setNumColors(16);
item.setChecked(true);
return true;
case R.id.menu_num_colors_24:
mAdapter.setNumColors(24);
item.setChecked(true);
return true;
case R.id.menu_num_colors_32:
mAdapter.setNumColors(32);
item.setChecked(true);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
final Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI.buildUpon()
.appendEncodedPath(String.valueOf(id)).build();
// Start the Detail Activity
Intent intent = new Intent(getActivity(), PaletteDetailActivity.class);
intent.setData(uri);
startActivity(intent);
}
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle bundle) {
return new CursorLoader(
getActivity(),
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
PROJECTION,
null,
null,
MediaStore.Images.ImageColumns.DATE_ADDED + " DESC");
}
@Override
public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) {
mAdapter.swapCursor(cursor);
}
@Override
public void onLoaderReset(Loader<Cursor> cursorLoader) {
mAdapter.swapCursor(null);
}
private static class PhotosCursorAdapter extends ResourceCursorAdapter {
private int mNumColors;
public PhotosCursorAdapter(Context context, Cursor c) {
super(context, R.layout.palette_list_item, c, false);
mContext = context;
}
/**
* Set the number of colors used for {@link Palette} generation.
*/
void setNumColors(int numColors) {
mNumColors = numColors;
notifyDataSetChanged();
}
@Override
public void bindView(final View view, Context context, Cursor cursor) {
// Let's reset the view, clearing the ImageView and resetting the background colors
// of the Palette UI
ImageView imageView = (ImageView) view.findViewById(R.id.image);
imageView.setImageDrawable(null);
view.findViewById(R.id.text_vibrant).setBackgroundDrawable(null);
view.findViewById(R.id.text_muted).setBackgroundDrawable(null);
view.findViewById(R.id.text_light_vibrant).setBackgroundDrawable(null);
view.findViewById(R.id.text_light_muted).setBackgroundDrawable(null);
view.findViewById(R.id.text_dark_vibrant).setBackgroundDrawable(null);
view.findViewById(R.id.text_dark_muted).setBackgroundDrawable(null);
final long id = cursor.getLong(
cursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns._ID));
ImageLoader.loadMediaStoreThumbnail(imageView, id, new ImageLoader.Listener() {
@Override
public void onImageLoaded(Bitmap bitmap) {
Palette.generateAsync(bitmap, mNumColors,
new Palette.PaletteAsyncListener() {
@Override
public void onGenerated(Palette palette) {
setBackgroundColor(
view.findViewById(R.id.text_vibrant),
palette.getVibrantSwatch());
setBackgroundColor(
view.findViewById(R.id.text_muted),
palette.getMutedSwatch());
setBackgroundColor(
view.findViewById(R.id.text_light_vibrant),
palette.getLightVibrantSwatch());
setBackgroundColor(
view.findViewById(R.id.text_light_muted),
palette.getLightMutedSwatch());
setBackgroundColor(
view.findViewById(R.id.text_dark_vibrant),
palette.getDarkVibrantSwatch());
setBackgroundColor(
view.findViewById(R.id.text_dark_muted),
palette.getDarkMutedSwatch());
}
});
}
});
}
}
static void setBackgroundColor(View view, Palette.Swatch swatch) {
if (view != null && swatch != null) {
view.setBackgroundColor(swatch.getRgb());
}
}
}
}