/***
Copyright (c) 2008-2012 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.downloader;
import android.app.Fragment;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.v13.app.FragmentCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.LocalBroadcastManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
public class DownloadFragment extends Fragment implements
View.OnClickListener, FragmentCompat.OnRequestPermissionsResultCallback {
private static final int REQUEST_STORAGE=123;
private Button b=null;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent,
Bundle savedInstanceState) {
View result=inflater.inflate(R.layout.main, parent, false);
b=(Button)result.findViewById(R.id.button);
b.setOnClickListener(this);
return(result);
}
@Override
public void onStart() {
super.onStart();
IntentFilter f=new IntentFilter(Downloader.ACTION_COMPLETE);
LocalBroadcastManager.getInstance(getActivity())
.registerReceiver(onEvent, f);
}
@Override
public void onStop() {
LocalBroadcastManager.getInstance(getActivity())
.unregisterReceiver(onEvent);
super.onStop();
}
@Override
public void onClick(View v) {
if (hasPermission(WRITE_EXTERNAL_STORAGE)) {
doTheDownload();
}
else {
FragmentCompat.requestPermissions(this,
new String[] { WRITE_EXTERNAL_STORAGE }, REQUEST_STORAGE);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
if (hasPermission(WRITE_EXTERNAL_STORAGE)) {
doTheDownload();
}
}
private void doTheDownload() {
b.setEnabled(false);
Intent i=new Intent(getActivity(), Downloader.class);
i.setData(Uri.parse("https://commonsware.com/Android/Android-1_0-CC.pdf"));
getActivity().startService(i);
}
private boolean hasPermission(String perm) {
return(ContextCompat.checkSelfPermission(getActivity(), perm)==
PackageManager.PERMISSION_GRANTED);
}
private BroadcastReceiver onEvent=new BroadcastReceiver() {
public void onReceive(Context ctxt, Intent i) {
b.setEnabled(true);
Toast.makeText(getActivity(), R.string.download_complete,
Toast.LENGTH_LONG).show();
}
};
}