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SavingActivity.java
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Tue, Jul 16, 08:21

SavingActivity.java
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package ch.epfl.esl.elevatedmonitor;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
public class SavingActivity extends AppCompatActivity implements ActivityCompat.OnRequestPermissionsResultCallback, NavigationView.OnNavigationItemSelectedListener {
public static ArrayList<Session> sessionsList = new ArrayList<>();
public static SessionAdapter sessionAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_save);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = findViewById(R.id.add_session);
fab.setOnClickListener(view -> {
// Add a new session
if (ServiceManager.getConnectedDevices().size() > 0) {
initExternalWriteAuthorizations();
} else {
Snackbar.make(view, R.string.connect_device_before, Snackbar.LENGTH_SHORT).show();
}
});
DrawerLayout drawer = findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
//--- init list of sessions
initExternalReadAuthorizations();
sessionAdapter = new SessionAdapter();
ListView sessionListView = findViewById(R.id.list_view_session);
sessionListView.setAdapter(sessionAdapter);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.save, menu);
return true;
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_settings) {
Intent settingActivity = new Intent(this, SettingsActivity.class);
startActivity(settingActivity);
} else if (id == R.id.auto_connect) {
Intent mainActivity = new Intent(this, MainActivity.class);
startActivity(mainActivity);
} else if (id == R.id.nav_monitoring) {
Intent monitoringActivity = new Intent(this, MonitoringActivity.class);
startActivity(monitoringActivity);
}
DrawerLayout drawer = findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
public void updateListSession() {
if (isExternalStorageReadable()) {
//First remove all inactive sessions
if (sessionsList.size() > 0) {
ArrayList<Session> activeSessionsList = new ArrayList<>();
for (Session session : sessionsList) {
if (session.isActive()) {
activeSessionsList.add(session);
}
}
sessionsList.clear();
sessionsList.addAll(activeSessionsList);
}
//Add inactive sessions from the file system.
File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);
if (path.isDirectory()) {
class SessionFilter implements FilenameFilter {
@Override
public boolean accept(File dir, String name) {
return name.indexOf("Session") == 0;
}
}
File[] fileList = path.listFiles(new SessionFilter());
for (File file : fileList) {
try {
Session newSession = new Session(file.getName());
boolean flagNotContains = false;
for (Session session : sessionsList) {
if (session.getSessionName().equals(newSession.getSessionName())) {
flagNotContains = true;
break;
}
}
if (flagNotContains) {
sessionsList.add(newSession);
}
} catch (Session.SessionException e) {
e.printStackTrace();
}
}
}
if (sessionAdapter != null) {
sessionAdapter.notifyDataSetChanged();
}
}
}
//--- Request Read permission to updateListSession
private void initExternalReadAuthorizations() {
// ASK for permissions
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, Constants.PERMISSION_READ_EXTERNAL_STORAGE);
} else {
updateListSession();
}
}
//--- Request Writing permission to add sessions
private void initExternalWriteAuthorizations() {
// ASK for permissions
if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, Constants.PERMISSION_WRITE_EXTERNAL_STORAGE);
} else {
showAddSession();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
switch (requestCode) {
case Constants.PERMISSION_WRITE_EXTERNAL_STORAGE: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
showAddSession();
}
return;
}
case Constants.PERMISSION_READ_EXTERNAL_STORAGE: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
updateListSession();
}
}
}
}
//--- Adding session
private void showAddSession() {
// Create and show the dialog.
AddSessionFragment addSessionFragment = AddSessionFragment.newInstance();
addSessionFragment.show(getSupportFragmentManager(), "addSessionDialog");
}
//--- Adapter
public class SessionAdapter extends BaseAdapter {
@Override
public int getCount() {
return sessionsList.size();
}
@Override
public Object getItem(int position) {
return sessionsList.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater vi = (LayoutInflater) SavingActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate(R.layout.list_session, parent, false);
}
TextView nameText = convertView.findViewById(R.id.textViewSessionName);
TextView dateText = convertView.findViewById(R.id.textViewDateValue);
final CheckBox activity = convertView.findViewById(R.id.checkBoxActivity);
nameText.setText(sessionsList.get(position).getName());
dateText.setText(sessionsList.get(position).getDate());
if (sessionsList.get(position).isActive()) {
activity.setChecked(true);
} else {
activity.setChecked(false);
activity.setEnabled(false);
}
activity.setOnClickListener(v -> {
if (!activity.isChecked()) {
activity.setChecked(false);
activity.setEnabled(false);
sessionsList.get(position).stopSession();
}
});
return convertView;
}
}
/* Checks if external storage is available to at least read */
private boolean isExternalStorageReadable() {
String state = Environment.getExternalStorageState();
return Environment.MEDIA_MOUNTED.equals(state) || Environment.MEDIA_MOUNTED_READ_ONLY.equals(state);
}
}

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