I have created a Fragment but don't know what to put inside
I have realised an NFC (to scan tags) application, but now I have to create fragment who works with my MainActivity because I'd like to implement ViewPager in future.
Problem is that i'm really beginner and my code became too big to know what I have to put in Activity and what I have to put in Fragment
One week that I'm trying to understand...
Here is my code
public class MainActivity extends FragmentActivity {
ObjectAnimator anim;
ObjectAnimator anim2;
private int display, result, detect = 0;
private NfcAdapter nfcAdapter;
private ImageButton nfcButton;
private PendingIntent pendingIntent;
private ImageButton qrButton;
private TextView text;
private ImageButton webButton;
String link = null;
public final int CUSTOMIZED_REQUEST_CODE = 0x0000ffff;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
slidr = Slidr.attach(this);
setDetect(1);
setContentView((int) R.layout.activity_main);
this.text = (TextView) findViewById(R.id.text);
this.nfcAdapter = NfcAdapter.getDefaultAdapter(this);
this.nfcButton = (ImageButton) findViewById(R.id.nfc_button);
this.anim = ObjectAnimator.ofFloat(this.nfcButton, "scaleX", new float[]{0.9f});
this.anim2 = ObjectAnimator.ofFloat(this.nfcButton, "scaleY", new float[]{0.9f});
IntentIntegrator integrator = new IntentIntegrator(this);
this.nfcButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
setDisplay(1);
manageBlinkEffect();
}
});
this.pendingIntent = PendingIntent.getActivity(this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) { // RESULTAT DU SCAN QR CODE
if (requestCode != CUSTOMIZED_REQUEST_CODE && requestCode != IntentIntegrator.REQUEST_CODE) {
super.onActivityResult(requestCode, resultCode, data);
return;
}
switch (requestCode) {
case CUSTOMIZED_REQUEST_CODE: {
Toast.makeText(this, "REQUEST_CODE = " + requestCode, Toast.LENGTH_LONG).show();
break;
}
default:
break;
}
IntentResult result = IntentIntegrator.parseActivityResult(resultCode, data);
if (result.getContents() != null) {
Log.d("MainActivity", "Scanned");
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Résultat du scan :");
if (URLUtil.isValidUrl(result.getContents())) { // si url...
builder.setNeutralButton("Visiter", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setPositiveButton("Fermer", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) { }
});
builder.setNegativeButton("Copier", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Texte copié", result.getContents());
clipboard.setPrimaryClip(clip);
}
});
} else { // si plain text...
builder.setNeutralButton("Copier", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Texte copié", result.getContents());
clipboard.setPrimaryClip(clip);
}
});
builder.setPositiveButton("Fermer", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) { }
});
}
builder.setMessage(result.getContents().toString());
builder.create().show();
}
}
public void manageBlinkEffect() { // ANIMATION DU LOGO SENZU SUITE A UN CLIC
anim.setDuration(1000);
anim.setRepeatMode(ValueAnimator.REVERSE);
anim.setRepeatCount(9);
anim.start();
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationCancel(animation);
if (getRes() != 1){
Animation shake = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.shake);
Toast.makeText(getApplicationContext(), "Aucun badge n'a été détécté !", Toast.LENGTH_SHORT).show();
nfcButton.startAnimation(shake);
}
}
});
anim2.setDuration(1000);
anim2.setRepeatMode(ValueAnimator.REVERSE);
anim2.setRepeatCount(9);
anim2.start();
}
public void onResume() {
super.onResume();
Intent intent = getIntent(); // Recuperer l'intent actuel
NdefMessage[] msgs;
if (getDetect() == 1 && (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction()) || NfcAdapter.ACTION_TECH_DISCOVERED.equals(intent.getAction()))) { // si l'application a ete lancee via une detection NFC du device (ACTION_NDEF_DISCOVERED, voir AndroidManifest)
Parcelable[] rawMessages =
intent.getParcelableArrayExtra("android.nfc.extra.NDEF_MESSAGES");
if (rawMessages != null) { // si NDEF dans le scan
setDisplay(1);
resolveIntent(intent); // parser le scan NFC
} else {
byte[] empty = new byte[0];
byte[] id = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
Tag tag = (Tag) intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
byte[] payload = NdefMessageParser.dumpTagData(tag).getBytes();
NdefRecord record = new NdefRecord(NdefRecord.TNF_UNKNOWN, empty, id, payload);
NdefMessage msg = new NdefMessage(new NdefRecord[] {record});
msgs = new NdefMessage[] {msg};
setDetect(0);
getResult(msgs);
}
}
NfcAdapter nfcAdapter2 = this.nfcAdapter;
if (nfcAdapter2 != null) {
if (!nfcAdapter2.isEnabled()) {
showWirelessSettings();
}
this.nfcAdapter.enableForegroundDispatch(this, this.pendingIntent, (IntentFilter[]) null, (String[][]) null);
}
}
private void showWirelessSettings() {
Toast.makeText(this, "Veuillez activer le service NFC", Toast.LENGTH_SHORT).show();
startActivity(new Intent("android.settings.WIRELESS_SETTINGS"));
}
public void onPause() {
setDetect(0);
super.onPause();
}
public void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
if (getDetect() != 1) {
resolveIntent(intent);
}
}
private void resolveIntent(Intent intent) { // DETECTION NFC ET PARSING NDEF
NdefMessage[] msgs;
String action = intent.getAction();
Log.d("Infos", getIntent().toString());
Log.d("Infos", "display = " + display);
if (getDisplay() != 1) {
Animation shake = AnimationUtils.loadAnimation(this, R.anim.shake);
nfcButton.startAnimation(shake);
Toast.makeText(this, "Veuillez lancer un scan", Toast.LENGTH_LONG).show();
return;
}
else if ("android.nfc.action.TAG_DISCOVERED".equals(action) || "android.nfc.action.TECH_DISCOVERED".equals(action) || "android.nfc.action.NDEF_DISCOVERED".equals(action)) {
setRes(1);
Parcelable[] rawMsgs = intent.getParcelableArrayExtra("android.nfc.extra.NDEF_MESSAGES");
if (rawMsgs != null) {
msgs = new NdefMessage[rawMsgs.length];
for (int i = 0; i < rawMsgs.length; i++) {
msgs[i] = (NdefMessage) rawMsgs[i];
}
} else {
byte[] empty = new byte[0];
byte[] id = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
Tag tag = (Tag) intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
byte[] payload = NdefMessageParser.dumpTagData(tag).getBytes();
NdefRecord record = new NdefRecord(NdefRecord.TNF_UNKNOWN, empty, id, payload);
NdefMessage msg = new NdefMessage(new NdefRecord[] {record});
msgs = new NdefMessage[] {msg};
}
if (getDisplay() == 1) {
getResult(msgs);
}
}
}
private void getResult(NdefMessage[] msgs) { // MODAL AVEC RESULTAT DU SCAN NFC
if (msgs != null && msgs.length != 0) {
final StringBuilder tmp_builder = new StringBuilder();
List<ParsedNdefRecord> records = NdefMessageParser.parse(msgs[0]);
int size = records.size();
for (int i = 0; i < size; i++) {
tmp_builder.append(records.get(i).str());
tmp_builder.append("\n");
}
System.out.println(tmp_builder.toString());
this.anim.cancel();
this.anim2.cancel();
setDisplay(0);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Resultat du scan :");
builder.setNeutralButton("Visiter", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
/* Intent i = new Intent(MainActivity.this, RightActivity.class);
link = tmp_builder.toString();
i.putExtra("url", link);
startActivity(i);*/
}
});
builder.setNegativeButton("Copier", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Texte copié", link);
clipboard.setPrimaryClip(clip);
}
});
builder.setPositiveButton("Fermer", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {}
});
builder.setMessage(tmp_builder.toString());
builder.create().show();
}
}
I don't know if I have to transfert my onResume, onPause etc. in my Fragment
Really lost...
aagrios
Bruno2 Answers
I think you need to make the changes in stages
I would understand how viewpager and fragments work first see https://abhiandroid.com/materialdesign/viewpager for a tutorial
The next stage is to create your first fragment with the nfcButton on it BUT not try to link it up yet with the NFC stuff.
This is because the starting point of handling NFC has to be in the Activity as you are overriding Activity methods to do this.
This is basically putting the code below in to the onViewCreated method of your fragment and moving the xml related to the button to the fragment's xml
this.text = (TextView) findViewById(R.id.text);
this.nfcButton = (ImageButton) findViewById(R.id.nfc_button);
this.anim = ObjectAnimator.ofFloat(this.nfcButton, "scaleX", new float[]{0.9f});
this.anim2 = ObjectAnimator.ofFloat(this.nfcButton, "scaleY", new float[]{0.9f});
this.nfcButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// setDisplay should not be used at this stage
// setDisplay(1);
manageBlinkEffect();
}
});
Also move the method manageBlinkEffect() to the fragment.
You should comment out in getResult as well at the moment
this.anim.cancel();
this.anim2.cancel();
Then setup your viewpager in main xml file
The reason for commenting out these lines at the moment is that these need Activity to Fragment communication, you should understand https://developer.android.com/training/basics/fragments/communicating
Next stage is connecting you button back to the setDetect Flag (replacing the commented out setDetect() line)
i.e Your Fragment with the nfcButton it in has to tell the MainActivity to start processing any NFC data it gets sent
Then the MainActivity in getResult needs to tell the Fragment with the nfc to stop animating it's Button IF the Fragment with the button in is being displayed and and that Fragment is up and running. Again this is fragment communication from Activity to Fragment this time.
answered on Stack Overflow Feb 20, 2020 by 
Andrew
AndrewFirst of all you should add ViewPager in XML;
Then;
In your activity define your viewpager like that;
viewPager = findViewById(R.id.viewpager_main)
Then use this for setup viewpager
setupViewPager(viewPager)
Create setupViewPager function like that;
private fun setupViewPager(viewPager: ViewPager) {
val adapter = ViewPagerAdapter(supportFragmentManager)
adapter.addFragment(
MainFragment(),
"Fragment1"
)
adapter.addFragment(
SecondFragment(),
"Fragment2"
)
viewPager.adapter = adapter}
Simple example of fragments;
class MainFragment() : Fragment() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
retainInstance = true
}
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? =
inflater.inflate(R.layout.info_screen_fragment, container, false)
/* info_screen_fragment is your xml for this fragment */
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
}
My codes written with Kotlin. But i used to this codes. Simple and flex.
answered on Stack Overflow Feb 20, 2020 by 
Murat Çakır
Murat ÇakırUser contributions licensed under CC BY-SA 3.0