/***
Copyright (c) 2008-2016 CommonsWare, LLC
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.
Covered in detail in the book _The Busy Coder's Guide to Android Development_
https://commonsware.com/Android
*/
package com.commonsware.android.recyclerview.videotable;
import android.Manifest;
import android.app.LoaderManager;
import android.content.CursorLoader;
import android.content.Loader;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.ViewGroup;
public class MainActivity extends RecyclerViewActivity implements
LoaderManager.LoaderCallbacks<Cursor> {
private static final int[] COLUMN_WEIGHTS={1, 4, 1};
private static final String STATE_IN_PERMISSION="inPermission";
private static final int REQUEST_PERMS=137;
private boolean isInPermission=false;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
ColumnWeightSpanSizeLookup spanSizer=new ColumnWeightSpanSizeLookup(COLUMN_WEIGHTS);
GridLayoutManager mgr=new GridLayoutManager(this, spanSizer.getTotalSpans());
mgr.setSpanSizeLookup(spanSizer);
setLayoutManager(mgr);
setAdapter(new VideoAdapter());
if (icicle!=null) {
isInPermission=
icicle.getBoolean(STATE_IN_PERMISSION, false);
}
if (hasFilesPermission()) {
loadVideos();
}
else if (!isInPermission) {
isInPermission=true;
ActivityCompat.requestPermissions(this,
new String[] {Manifest.permission.READ_EXTERNAL_STORAGE},
REQUEST_PERMS);
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean(STATE_IN_PERMISSION, isInPermission);
}
@Override
public void onRequestPermissionsResult(int requestCode,
String[] permissions,
int[] grantResults) {
isInPermission=false;
if (requestCode==REQUEST_PERMS) {
if (hasFilesPermission()) {
loadVideos();
}
else {
finish(); // denied permission, so we're done
}
}
}
@Override
public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
return(new CursorLoader(this,
MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
null, null, null,
MediaStore.Video.Media.TITLE));
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor c) {
((VideoAdapter)getAdapter()).setVideos(c);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
((VideoAdapter)getAdapter()).setVideos(null);
}
private boolean hasFilesPermission() {
return(ContextCompat.checkSelfPermission(this,
Manifest.permission.READ_EXTERNAL_STORAGE)==
PackageManager.PERMISSION_GRANTED);
}
private void loadVideos() {
getLoaderManager().initLoader(0, null, this);
}
class VideoAdapter extends RecyclerView.Adapter<BaseVideoController> {
Cursor videos=null;
@Override
public BaseVideoController onCreateViewHolder(ViewGroup parent, int viewType) {
BaseVideoController result=null;
switch(viewType) {
case 0:
result=new VideoThumbnailController(getLayoutInflater()
.inflate(R.layout.thumbnail,
parent, false));
break;
case 1:
int cursorColumn=videos.getColumnIndex(MediaStore.Video.VideoColumns.DISPLAY_NAME);
result=new VideoTextController(getLayoutInflater()
.inflate(R.layout.label,
parent, false),
android.R.id.text1,
cursorColumn);
break;
case 2:
cursorColumn=videos.getColumnIndex(MediaStore.Video.VideoColumns.DURATION);
result=new VideoTextController(getLayoutInflater()
.inflate(R.layout.label,
parent, false),
android.R.id.text1,
cursorColumn);
break;
}
return(result);
}
@Override
public void onBindViewHolder(BaseVideoController holder, int position) {
videos.moveToPosition(position/3);
holder.bindModel(videos);
}
void setVideos(Cursor videos) {
this.videos=videos;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
if (videos==null) {
return(0);
}
return(videos.getCount()*3);
}
@Override
public int getItemViewType(int position) {
return(position % 3);
}
}
}