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J'ai développé une application qui comprend l'enregistrement de connexion, GPS et scanner QR. Maintenant, j'ai mon code QR scan dans le profilefragment.java et je l'appelle de mainactivity.java.Le bouton pour QR scan est dans le profilefragment.xml et l'activité principale a mainactivity.java qui a le bloc try catch. Au lieu d'aller dans le bloc try-catch, il montre le message toast. De plus, le format de chaîne généré par QR est correct.Définir TextView au lieu de toast de fragment en activité
code QR pour analyser dans le fragment de profil (résultat d'analyse QR dans le principal activity.java)
public class ProfileFragment extends Fragment implements View.OnClickListener {
private TextView tv_name, tv_email, tv_message;
private SharedPreferences pref;
private AppCompatButton btn_change_password, btn_logout;
private EditText et_old_password, et_new_password;
private AlertDialog dialog;
private ProgressBar progress;
private Button buttonScan, Nextbutton;
private TextView textViewUnique;
private IntentIntegrator qrScan;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_profile, container, false);
initViews(view);
return view;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
pref = getActivity().getPreferences(0);
tv_name.setText("Welcome : " + pref.getString(Constants.NAME, ""));
tv_email.setText(pref.getString(Constants.EMAIL, ""));
}
private void initViews(View view) {
tv_name = (TextView) view.findViewById(R.id.tv_name);
tv_email = (TextView) view.findViewById(R.id.tv_email);
btn_change_password = (AppCompatButton) view.findViewById(R.id.btn_chg_password);
btn_logout = (AppCompatButton) view.findViewById(R.id.btn_logout);
buttonScan = (Button) view.findViewById(R.id.buttonScan);
Nextbutton = (Button) view.findViewById(R.id.Next);
textViewUnique = (TextView) view.findViewById(R.id.textViewUniqueId);
btn_change_password.setOnClickListener(this);
btn_logout.setOnClickListener(this);
buttonScan.setOnClickListener(this);
qrScan = new IntentIntegrator(getActivity());
Nextbutton.setOnClickListener(this);
}
private void showDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
View view = inflater.inflate(R.layout.dialog_change_password, null);
et_old_password = (EditText) view.findViewById(R.id.et_old_password);
et_new_password = (EditText) view.findViewById(R.id.et_new_password);
tv_message = (TextView) view.findViewById(R.id.tv_message);
progress = (ProgressBar) view.findViewById(R.id.progress);
builder.setView(view);
builder.setTitle("Change Password");
builder.setPositiveButton("Change Password", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog = builder.create();
dialog.show();
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String old_password = et_old_password.getText().toString();
String new_password = et_new_password.getText().toString();
if (!old_password.isEmpty() && !new_password.isEmpty()) {
progress.setVisibility(View.VISIBLE);
changePasswordProcess(pref.getString(Constants.EMAIL, ""), old_password, new_password);
} else {
tv_message.setVisibility(View.VISIBLE);
tv_message.setText("Fields are empty");
}
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_chg_password:
showDialog();
break;
case R.id.btn_logout:
logout();
break;
case R.id.buttonScan:
qrScan.initiateScan();
break;
case R.id.Next:
Intent intent = new Intent(getActivity(), MapMainActivity.class);
getActivity().startActivity(intent);
break;
}
}
private void logout() {
SharedPreferences.Editor editor = pref.edit();
editor.putBoolean(Constants.IS_LOGGED_IN, false);
editor.putString(Constants.EMAIL, "");
editor.putString(Constants.NAME, "");
editor.putString(Constants.UNIQUE_ID, "");
editor.apply();
goToLogin();
}
private void goToLogin() {
Fragment login = new LoginFragment();
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.fragment_frame, login);
ft.commit();
}
private void changePasswordProcess(String email, String old_password, String new_password) {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(Constants.BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
RequestInterface requestInterface = retrofit.create(RequestInterface.class);
User user = new User();
user.setEmail(email);
user.setOld_password(old_password);
user.setNew_password(new_password);
ServerRequest request = new ServerRequest();
request.setOperation(Constants.CHANGE_PASSWORD_OPERATION);
request.setUser(user);
Call<ServerResponse> response = requestInterface.operation(request);
response.enqueue(new Callback<ServerResponse>() {
@Override
public void onResponse(Call<ServerResponse> call, retrofit2.Response<ServerResponse> response) {
ServerResponse resp = response.body();
if (resp.getResult().equals(Constants.SUCCESS)) {
progress.setVisibility(View.GONE);
tv_message.setVisibility(View.GONE);
dialog.dismiss();
Snackbar.make(getView(), resp.getMessage(), Snackbar.LENGTH_LONG).show();
} else {
progress.setVisibility(View.GONE);
tv_message.setVisibility(View.VISIBLE);
tv_message.setText(resp.getMessage());
}
}
@Override
public void onFailure(Call<ServerResponse> call, Throwable t) {
Log.d(Constants.TAG, "failed");
progress.setVisibility(View.GONE);
tv_message.setVisibility(View.VISIBLE);
tv_message.setText(t.getLocalizedMessage());
}
});
}
}
mainactivity.java
public class MainActivity extends FragmentActivity {
private TextView textViewUnique;
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.fragment_profile,container,false);
TextView textViewUnique = (TextView) view.findViewById(R.id.textViewUniqueId);
//return inflater.inflate(R.layout.fragment_profile, container);
return view;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textViewUnique = (TextView) findViewById(com.learn2crack.loginregistration.R.id.textViewUniqueId);
pref = getPreferences(0);
initFragment();
}
private void initFragment() {
Fragment fragment;
if (pref.getBoolean(Constants.IS_LOGGED_IN, false)) {
fragment = new ProfileFragment();
} else {
fragment = new LoginFragment();
}
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.fragment_frame, fragment);
ft.commit();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if (result != null) {
//if qrcode has nothing in it
if (result.getContents() == null) {
Toast.makeText(this, "Result Not Found", Toast.LENGTH_LONG).show();
} else {
//if qr contains data
try {
ProfileFragment profileFragment = new ProfileFragment();
profileFragment.onActivityResult(requestCode, resultCode, data);
JSONObject obj = new JSONObject(result.getContents());
textViewUnique.setText(obj.getString("unique_id"));
//textViewUnique.setText(obj.getString("unique id"));
} catch (Exception e) {
e.printStackTrace();
//if control comes here
//that means the encoded format not matches
//in this case you can display whatever data is available on the qrcode
//to a toast
Toast.makeText(this, result.getContents(), Toast.LENGTH_LONG).show();
}
}
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
}
Les deux XML sont
activitymain.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.learn2crack.loginregistration.MainActivity">
<FrameLayout
android:id="@+id/fragment_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
profil fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/activity_main"
android:orientation="vertical"
android:layout_marginLeft="40dp"
android:layout_marginRight="40dp"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false">
<Button
android:id="@+id/buttonScan"
android:layout_width="104dp"
android:layout_height="wrap_content"
android:text="QR Scan"
android:layout_gravity="right" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="unique_id"
android:textSize="20dp" />
<TextView
android:id="@+id/textViewUniqueId"
android:layout_marginTop="10dp"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"/>
</LinearLayout>