Example usage for android.view KeyEvent KEYCODE_BACK

Introduction

In this page you can find the example usage for android.view KeyEvent KEYCODE_BACK.

Prototype

int KEYCODE_BACK

To view the source code for android.view KeyEvent KEYCODE_BACK.

Click Source Link

Document

Key code constant: Back key.

Usage

From source file:com.krayzk9s.imgurholo.activities.MainActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    //Handle the back button
    SharedPreferences settings = getSettings();
    FragmentManager fragmentManager = getSupportFragmentManager();
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        if (getActionBar() != null)
            getActionBar().show();//from  w ww  .  j  a  v  a 2s. co m
    }
    if (keyCode == KeyEvent.KEYCODE_BACK && settings.getBoolean("ConfirmExit", false) && isTaskRoot()
            && fragmentManager.getBackStackEntryCount() == 0) {
        //Ask the user if they want to quit
        new AlertDialog.Builder(this).setTitle(R.string.dialog_quit_title)
                .setMessage(R.string.dialog_quit_summary)
                .setPositiveButton(R.string.dialog_answer_yes, new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        //Stop the activity
                        MainActivity.this.finish();
                    }

                }).setNegativeButton(R.string.no, null).show();
        return true;
    } else {
        return super.onKeyDown(keyCode, event);
    }

}

---

From source file:com.alivenet.dmvtaxi.fragment.Fragment_ride_list.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_ride_list, container, false);
    mPref = getActivity().getSharedPreferences(MYPREF, Context.MODE_PRIVATE);
    mUserId = mPref.getString("userId", null);

    progressDialog = new ProgressDialog(getActivity());
    progressDialog.setMessage("Please wait...");
    progressDialog.setCancelable(false);

    recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
    recyclerView.setHasFixedSize(true);/*from   w  w w.j  av  a2  s  .  c o  m*/
    LinearLayoutManager llm = new LinearLayoutManager(getActivity());
    llm.setOrientation(LinearLayoutManager.VERTICAL);

    recyclerView.addItemDecoration(new SpacesItemDecoration(VERTICAL_ITEM_SPACE));

    recyclerView.setLayoutManager(llm);
    recyclerView.setItemAnimator(new DefaultItemAnimator());
    mnorides = (TextView) view.findViewById(R.id.tv_norides);
    RequestParams params = new RequestParams();
    params.put("userId", mUserId);
    rideListWs(params);

    view.setFocusableInTouchMode(true);
    view.requestFocus();
    view.setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK) {
                // handle back button's click listener

                if (keyCode == KeyEvent.KEYCODE_BACK) {

                    Fragment homeFragment = new FragmentMainScreen();
                    FragmentManager frgManager;
                    frgManager = getFragmentManager();
                    frgManager.beginTransaction().replace(R.id.fragment_switch, homeFragment).commit();

                    return true;
                }

                return true;
            }
            return false;
        }
    });

    return view;
}

---

From source file:com.github.snowdream.android.app.books.BookFragment.java

private void initUI(View rootview) {
    webView = (WebView) rootview.findViewById(R.id.webView);
    //        progressbar = (SmoothProgressBar) rootview.findViewById(R.id.progressbar);
    WebSettings webSettings = webView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webSettings.setDomStorageEnabled(true);
    webSettings.setAllowFileAccess(true);
    webSettings.setSupportZoom(true);//from w  ww.  j  a  v  a  2 s  . c o m
    webSettings.setBuiltInZoomControls(true);
    webSettings.setUseWideViewPort(true);
    String appCachePath = getActivity().getApplicationContext().getCacheDir().getAbsolutePath();
    webSettings.setAppCachePath(appCachePath);
    webSettings.setAppCacheEnabled(true);

    webView.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
            //                progressbar.setVisibility(View.VISIBLE);
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            //                progressbar.setVisibility(View.INVISIBLE);
        }

        @Override
        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
            super.onReceivedError(view, errorCode, description, failingUrl);
            //                progressbar.setVisibility(View.INVISIBLE);
        }
    });
    webView.setWebChromeClient(new WebChromeClient() {
        @Override
        public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
            return super.onJsAlert(view, url, message, result);
        }
    });

    // The "loadAdOnCreate" and "testDevices" XML attributes no longer available.
    AdView adView = (AdView) rootview.findViewById(R.id.adView);
    AdRequest adRequest = new AdRequest.Builder().addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
            .addTestDevice(TEST_DEVICE_ID).build();
    adView.loadAd(adRequest);

    getView().setFocusableInTouchMode(true);
    getView().setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (webView.canGoBack() && keyCode == KeyEvent.KEYCODE_BACK) {
                webView.goBack();

                return true;
            }
            return false;
        }
    });
}

---

From source file:com.ryan.ryanreader.fragments.AddAccountDialog.java

@Override
public Dialog onCreateDialog(final Bundle savedInstanceState) {

    if (alreadyCreated)
        return getDialog();
    alreadyCreated = true;/*from  w w w .  ja v a2 s .  c o  m*/

    super.onCreateDialog(savedInstanceState);

    final AlertDialog.Builder builder = new AlertDialog.Builder(getSupportActivity());
    builder.setTitle(R.string.accounts_add);

    final View view = getSupportActivity().getLayoutInflater().inflate(R.layout.dialog_login, null);
    builder.setView(view);
    builder.setCancelable(true);

    final EditText usernameBox = ((EditText) view.findViewById(R.id.login_username));
    usernameBox.setText(lastUsername);
    usernameBox.requestFocus();
    usernameBox.requestFocusFromTouch();

    builder.setPositiveButton(R.string.accounts_login, new DialogInterface.OnClickListener() {
        public void onClick(final DialogInterface dialogInterface, final int i) {

            final String username = ((EditText) getDialog().findViewById(R.id.login_username)).getText()
                    .toString().trim();
            final String password = ((EditText) getDialog().findViewById(R.id.login_password)).getText()
                    .toString();

            lastUsername = username;

            final ProgressDialog progressDialog = new ProgressDialog(getSupportActivity());
            final Thread thread;
            progressDialog.setTitle(R.string.accounts_loggingin);
            progressDialog.setMessage(getString(R.string.accounts_loggingin_msg));
            progressDialog.setIndeterminate(true);

            final AtomicBoolean cancelled = new AtomicBoolean(false);

            progressDialog.setCancelable(true);
            progressDialog.setCanceledOnTouchOutside(false);

            progressDialog.show();

            progressDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
                public void onCancel(final DialogInterface dialogInterface) {
                    cancelled.set(true);
                    progressDialog.dismiss();
                }
            });

            progressDialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
                public boolean onKey(final DialogInterface dialogInterface, final int keyCode,
                        final KeyEvent keyEvent) {

                    if (keyCode == KeyEvent.KEYCODE_BACK) {
                        cancelled.set(true);
                        progressDialog.dismiss();
                    }

                    return true;
                }
            });

            thread = new Thread() {
                @Override
                public void run() {

                    // TODO better HTTP client
                    final RedditAccount.LoginResultPair result = RedditAccount.login(getSupportActivity(),
                            username, password, new DefaultHttpClient());

                    new Handler(Looper.getMainLooper()).post(new Runnable() {
                        public void run() {

                            if (cancelled.get())
                                return; // safe, since we're in the UI thread

                            progressDialog.dismiss();

                            final AlertDialog.Builder alertBuilder = new AlertDialog.Builder(
                                    getSupportActivity());
                            alertBuilder.setNeutralButton(R.string.dialog_close,
                                    new DialogInterface.OnClickListener() {
                                        public void onClick(DialogInterface dialog, int which) {
                                            new AccountListDialog().show(getSupportActivity());
                                        }
                                    });

                            // TODO handle errors better
                            switch (result.result) {
                            case CONNECTION_ERROR:
                                alertBuilder.setTitle(R.string.error_connection_title);
                                alertBuilder.setMessage(R.string.message_cannotlogin);
                                break;
                            case INTERNAL_ERROR:
                                alertBuilder.setTitle(R.string.error_unknown_title);
                                alertBuilder.setMessage(R.string.message_cannotlogin);
                                break;
                            case JSON_ERROR:
                                alertBuilder.setTitle(R.string.error_parse_title);
                                alertBuilder.setMessage(R.string.message_cannotlogin);
                                break;
                            case REQUEST_ERROR:
                                alertBuilder.setTitle(R.string.error_connection_title);
                                alertBuilder.setMessage(R.string.message_cannotlogin);
                                break;
                            case UNKNOWN_REDDIT_ERROR:
                                alertBuilder.setTitle(R.string.error_unknown_title);
                                alertBuilder.setMessage(R.string.message_cannotlogin);
                                break;
                            case WRONG_PASSWORD:
                                alertBuilder.setTitle(R.string.error_invalid_password_title);
                                alertBuilder.setMessage(R.string.error_invalid_password_message);
                                break;
                            case RATELIMIT:
                                alertBuilder.setTitle(R.string.error_ratelimit_title);
                                alertBuilder.setMessage(String.format("%s \"%s\"",
                                        getString(R.string.error_ratelimit_message), result.extraMessage));
                                break;
                            case SUCCESS:
                                RedditAccountManager.getInstance(getSupportActivity())
                                        .addAccount(result.account);
                                RedditAccountManager.getInstance(getSupportActivity())
                                        .setDefaultAccount(result.account);
                                alertBuilder.setTitle(R.string.general_success);
                                alertBuilder.setMessage(R.string.message_nowloggedin);
                                lastUsername = "";
                                break;
                            default:
                                throw new RuntimeException();
                            }

                            final AlertDialog alertDialog = alertBuilder.create();
                            alertDialog.show();
                        }
                    });
                }
            };

            thread.start();
        }
    });

    builder.setNegativeButton(R.string.dialog_cancel, null);

    return builder.create();
}

---

From source file:com.example.android.contactslist.ui.eventEntry.EventEntryActivity.java

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        Toast.makeText(this, R.string.entry_discarded, Toast.LENGTH_SHORT).show();

        //Return to last activity
        this.finish(); // same as hitting back button
        //TODO: do other stuff for tablet
    }/*from  w  ww  .j a  v a 2s . c  o m*/

    // Call super code so we dont limit default interaction
    //super.onKeyDown(keyCode, event);

    return true;
}

---

From source file:com.example.nq.journalism_master.innerbrowser.InnerBrowserFragment.java

@Nullable
@Override// w  w w .j  a va  2 s. c  o  m
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
        @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_inner_browser, container, false);

    initViews(view);
    initWebViewSettings(webView);

    // if not set this, click the back arrow will call nothing
    setHasOptionsMenu(true);

    webView.setWebChromeClient(new WebChromeClient() {
        @Override
        public void onProgressChanged(WebView view, int newProgress) {
            changeToolbarAndProgressBar(newProgress);
        }
    });

    webView.setWebViewClient(new WebViewClient() {

        @Override
        public void onReceivedError(WebView view1, WebResourceRequest request, WebResourceError error) {

            webView.setVisibility(View.GONE);
            imageView.setVisibility(View.VISIBLE);
            textView.setVisibility(View.VISIBLE);

            imageView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (NetworkState.networkConnected(getContext())) {
                        webView.loadUrl(url);
                        webView.setVisibility(View.VISIBLE);
                        imageView.setVisibility(View.GONE);
                        textView.setVisibility(View.GONE);
                    }
                }
            });

        }

        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            progressBar.setVisibility(View.GONE);
        }
    });

    // WebView?html?
    webView.setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                if (keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()) {
                    webView.goBack();
                    return true;
                }
            }
            return false;
        }
    });

    webView.loadUrl(url);

    return view;
}

---

From source file:ayushi.view.fragment.SettingsFragment.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.frag_settings, container, false);

    getActivity().setTitle("About App");

    mToolbar = (Toolbar) rootView.findViewById(R.id.htab_toolbar);
    if (mToolbar != null) {
        ((ECartHomeActivity) getActivity()).setSupportActionBar(mToolbar);
    }/* ww w  .ja  v  a  2  s  . c  o  m*/

    if (mToolbar != null) {
        ((ECartHomeActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        mToolbar.setNavigationIcon(R.drawable.ic_drawer);

    }

    mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            ((ECartHomeActivity) getActivity()).getmDrawerLayout().openDrawer(GravityCompat.START);
        }
    });

    mToolbar.setTitleTextColor(Color.WHITE);

    submitLog = (TextView) rootView.findViewById(R.id.submit_log_txt);

    if (PreferenceHelper.getPrefernceHelperInstace().getBoolean(getActivity(), PreferenceHelper.SUBMIT_LOGS,
            true)) {

        submitLog.setText("Disable");
    } else {
        submitLog.setText("Enable");
    }

    rootView.findViewById(R.id.submit_log).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            if (PreferenceHelper.getPrefernceHelperInstace().getBoolean(getActivity(),
                    PreferenceHelper.SUBMIT_LOGS, true)) {
                PreferenceHelper.getPrefernceHelperInstace().setBoolean(getActivity(),
                        PreferenceHelper.SUBMIT_LOGS, false);

                submitLog.setText("Disable");
            } else {
                PreferenceHelper.getPrefernceHelperInstace().setBoolean(getActivity(),
                        PreferenceHelper.SUBMIT_LOGS, true);
                submitLog.setText("Enable");
            }

        }
    });

    rootView.setFocusableInTouchMode(true);
    rootView.requestFocus();
    rootView.setOnKeyListener(new View.OnKeyListener() {

        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {

            if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK) {

                Utils.switchContent(R.id.frag_container, Utils.HOME_FRAGMENT,
                        ((ECartHomeActivity) (getContext())), AnimationType.SLIDE_UP);

            }
            return true;
        }
    });

    rootView.findViewById(R.id.picasso).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent browserIntent = new Intent(Intent.ACTION_VIEW,
                    Uri.parse("https://github.com/square/picasso"));
            startActivity(browserIntent);

        }
    });

    rootView.findViewById(R.id.acra).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://github.com/ACRA/acra"));
            startActivity(browserIntent);

        }
    });

    rootView.findViewById(R.id.pull_zoom_view).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent browserIntent = new Intent(Intent.ACTION_VIEW,
                    Uri.parse("https://github.com/Frank-Zhu/PullZoomView"));
            startActivity(browserIntent);

        }
    });

    rootView.findViewById(R.id.list_buddies).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent browserIntent = new Intent(Intent.ACTION_VIEW,
                    Uri.parse("https://github.com/jpardogo/ListBuddies"));
            startActivity(browserIntent);

        }
    });

    rootView.findViewById(R.id.list_jazzy).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent browserIntent = new Intent(Intent.ACTION_VIEW,
                    Uri.parse("https://github.com/twotoasters/JazzyListView"));
            startActivity(browserIntent);

        }
    });

    rootView.findViewById(R.id.email_dev).setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
            emailIntent.setType("text/plain");
            emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,
                    new String[] { "serveroverloadofficial@gmail.com" });
            emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Hello There");
            emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Add Message here");

            emailIntent.setType("message/rfc822");

            try {
                startActivity(Intent.createChooser(emailIntent, "Send email using..."));
            } catch (android.content.ActivityNotFoundException ex) {
                Toast.makeText(getActivity(), "No email clients installed.", Toast.LENGTH_SHORT).show();
            }

        }
    });

    return rootView;
}

---

From source file:com.libreteam.taxi.Customer_Boarding.java

@SuppressLint("InflateParams")
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override//from   w  w  w  . ja  v a  2  s.  c o  m
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    View view = inflater.inflate(R.layout.customer_boarding_, null);
    context = view.getContext();
    isTracking = false;

    ride_id = getArguments().getStringArray("rideid")[0];
    customer_id = getArguments().getStringArray("rideid")[1];
    address = getArguments().getStringArray("rideid")[2];
    latlng = getArguments().getStringArray("rideid")[3];
    car_model = getArguments().getStringArray("rideid")[4];
    time = getArguments().getStringArray("rideid")[5];
    //       username= getArguments().getStringArray("rideid")[6];
    username = Customer_Constants.selected_taxi_appname; //jin
    taxi_company = getArguments().getStringArray("rideid")[7];
    //       license_plate = getArguments().getStringArray("rideid")[8];
    license_plate = Customer_Constants.selected_plate_number;
    //       avatar = getArguments().getStringArray("rideid")[9];
    Taxi_System.testLog(address);

    ArrayList aList = new ArrayList(Arrays.asList(latlng.split(",")));
    ArrayList d_aList = new ArrayList(Arrays.asList(getArguments().getStringArray("rideid")[12].split(",")));
    customerLatLng = new LatLng(Double.parseDouble(d_aList.get(0).toString()),
            Double.parseDouble(d_aList.get(1).toString()));
    driverLatLng = new LatLng(Double.parseDouble(aList.get(0).toString()),
            Double.parseDouble(aList.get(1).toString()));

    if (savedInstanceState == null)
        initComponents(view);

    view.setFocusableInTouchMode(true);
    view.requestFocus();
    view.setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (keyCode == KeyEvent.KEYCODE_BACK) {
                if (((Customer_Fragment_Activity) getActivity()).isMenu) {
                    ((Customer_Fragment_Activity) getActivity()).didHideMenu();
                    return true;
                }
                didRejectRide();
                ((Customer_Fragment_Activity) getActivity()).didFinish();
                return true;
            } else
                return false;
        }
    });
    return view;
}

---

From source file:it.unipr.ce.dsg.gamidroid.activities.BuildingLookupActivity.java

/**
 * When back button is pressed to get back to the map, stop listening for
 * the updates related to the building/*from  ww w . jav a  2 s  . c  o m*/
 */
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        GamiNode.getAndroidGamiNode(mContext).getRfm().stopBuildingNotificationLookup();
        onBackPressed();
    }
    return super.onKeyDown(keyCode, event);
}

---

From source file:de.trier.infsec.koch.droidsheep.activities.HijackActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
        webview.goBack();//  w ww . j  av  a  2  s . c  om
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

---

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