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.example.innf.newchangtu.Map.view.activity.MainActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    sendSMSTime = System.currentTimeMillis();/*?*/
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) {
        DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
            drawerLayout.closeDrawer(GravityCompat.START);
        } else {//from w  w  w  .  j av a 2  s.c o m
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            AlertDialog dialog = builder.setTitle(R.string.app_name).setIcon(R.mipmap.ic_launcher)
                    .setMessage("?")
                    .setPositiveButton("", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            finish();
                            System.exit(0);
                        }
                    }).setNegativeButton("?", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {

                        }
                    }).show();
        }
        return true;
    } else if (keyCode == KeyEvent.KEYCODE_POWER && event.getAction() == KeyEvent.ACTION_DOWN) {
        if ((System.currentTimeMillis() - sendSMSTime) < 2000) {
            powerButtonClickTimes++;
            if (powerButtonClickTimes == 4) {
                Log.d(TAG, powerButtonClickTimes + "");
                showToast("???");
            }
        } else {
            powerButtonClickTimes = 0;
        }
    }
    return super.onKeyDown(keyCode, event);
}

---

From source file:com.kaichaohulian.baocms.ecdemo.ui.chatting.ChattingFragment.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
        LogUtil.d(TAG, "keycode back , chatfooter mode: " + mChattingFooter.getMode());
        if (!mChattingFooter.isButtomPanelNotVisibility()) {
            hideBottom();/*from  w ww  . j  ava2  s .c  om*/
            return true;
        }
        setIsFinish(true);
    } else if (keyCode == KeyEvent.KEYCODE_DEL) {
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            mHandlerDelChar = !(mChattingFooter.getCharAtCursor() != (char) (8197));
        }
        if (event.getAction() == KeyEvent.ACTION_UP && mHandlerDelChar) {
            mHandlerDelChar = false;
            CCPChattingFooter2 footer = this.mChattingFooter;
            int selectionStart = footer.getSelectionStart();
            String text = footer.getLastText().substring(0, selectionStart);
            int atIndex = text.lastIndexOf('@');
            if (atIndex < text.length() && atIndex >= 0) {
                delAtSomeBody(text.substring(atIndex, selectionStart));
                String subStartText = text.substring(0, atIndex);
                String subSecondText = footer.getLastText().substring(selectionStart);
                StringBuilder sb = new StringBuilder();
                sb.append(subStartText).append(subSecondText);
                footer.setLastText(sb.toString());
                footer.mEditText.setSelection(atIndex);
            }
        }
    }
    return super.onKeyDown(keyCode, event);
}

---

From source file:android.support.v7.app.AppCompatDelegateImplV7.java

boolean onKeyUp(int keyCode, KeyEvent event) {
    switch (keyCode) {
    case KeyEvent.KEYCODE_MENU:
        onKeyUpPanel(Window.FEATURE_OPTIONS_PANEL, event);
        return true;
    case KeyEvent.KEYCODE_BACK:
        PanelFeatureState st = getPanelState(Window.FEATURE_OPTIONS_PANEL, false);
        if (st != null && st.isOpen) {
            closePanel(st, true);/*from ww  w . ja va 2  s.  c  o m*/
            return true;
        }
        if (onBackPressed()) {
            return true;
        }
        break;
    }
    return false;
}

---

From source file:com.freerdp.freerdpcore.presentation.SessionActivity.java

@Override
public boolean onKeyDown(int keycode, KeyEvent event) {
    if (keycode == KeyEvent.KEYCODE_BACK && rladvertising.getVisibility() == View.VISIBLE) {
        try {/*from   ww  w .j av a 2  s .c  o  m*/
            connectCancelledByUser = true;
            rladvertising.stopPlay();
            rladvertising.getLock().notifyAll();
            LibFreeRDP.cancelConnection(session.getInstance());
        } catch (Exception e) {

        }
        finish();
        return false;
    }

    if (event.getRepeatCount() == 0 && keycode == KeyEvent.KEYCODE_BACK) {
        event.startTracking();
        return true;
    }

    return keyboardMapper.processAndroidKeyEvent(event);
}

---

From source file:com.jinrustar.sky.main.MainActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    // TODO Auto-generated method stub
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        //            if(search_layout.getVisibility()==View.VISIBLE){
        //                search_layout.setVisibility(View.GONE);
        //                scan.setEnabled(true);
        //                return true;
        //            }
        long secondTime = System.currentTimeMillis();
        if (secondTime - firstTime > 2000) {
            Toast.makeText(this, R.string.another_click_to_quit, Toast.LENGTH_SHORT).show();
            firstTime = secondTime;//from  w  ww .j  a va2 s. c  om
            return true;
        } else {
            finish();
            System.exit(0);
            return true;
        }
    }
    return super.onKeyDown(keyCode, event);
}

---

From source file:com.ichi2.anki.Info.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
        if (mType == TYPE_SHARED_DECKS && mWebView.canGoBack()) {
            mWebView.goBack();// w  w  w  . j av  a 2  s .  c o  m
        } else if (mType == TYPE_UPGRADE_DECKS && mUpgradeStage != UPGRADE_SCREEN_BASIC1) {
            Intent result = new Intent();
            result.putExtra(TYPE_ANIMATION_RIGHT, true);
            switch (mUpgradeStage) {
            case UPGRADE_SCREEN_BASIC2:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC1);
                break;

            case UPGRADE_SCREEN_MORE_OPTIONS:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC1);
                break;

            case UPGRADE_SCREEN_WEB_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_PC_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_MANUAL_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_AUTO_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_PC_UPGRADE);
                break;
            }
            setResult(RESULT_OK, result);
            finishWithAnimation(false);
        } else {
            Timber.i("onBackPressed()");
            setResult(RESULT_CANCELED);
            finishWithAnimation();
        }
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

---

From source file:com.gelakinetic.mtgfam.activities.MainActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_SEARCH) {
        // Send the search key to the leftmost fragment
        Fragment f = mFragmentManager.findFragmentById(R.id.left_container);
        if (((FamiliarFragment) f).onInterceptSearchKey() == false) {
            return super.onKeyDown(keyCode, event);
        } else {/*from w  w  w.ja  va 2  s .co m*/
            return true;
        }
    } else if (keyCode == KeyEvent.KEYCODE_BACK) {
        // If we're not at the root of a hierarchy, the back button should do as it pleases
        if (getSupportFragmentManager().getBackStackEntryCount() > 0 || !this.isTaskRoot()) {
            return super.onKeyDown(keyCode, event);
        }
        // Else if were at the root, and the SlidingMenu is closed, it should open the menu
        else if (!this.getSlidingMenu().isMenuShowing()) {
            this.getSlidingMenu().showMenu();
            return true;
        }

        // If the SlidingMenu is open, it should close the app
        else {
            return super.onKeyDown(keyCode, event);
        }
    }
    return super.onKeyDown(keyCode, event);
}

---

From source file:com.ichi2.anki2.Info.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
        if (mType == TYPE_SHARED_DECKS && mWebView.canGoBack()) {
            mWebView.goBack();/*from  w  w  w . j  a  v  a  2s. c  om*/
        } else if (mType == TYPE_UPGRADE_DECKS && mUpgradeStage != UPGRADE_SCREEN_BASIC1) {
            Intent result = new Intent();
            result.putExtra(TYPE_ANIMATION_RIGHT, true);
            switch (mUpgradeStage) {
            case UPGRADE_SCREEN_BASIC2:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC1);
                break;

            case UPGRADE_SCREEN_MORE_OPTIONS:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC1);
                break;

            case UPGRADE_SCREEN_WEB_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_PC_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_MANUAL_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_AUTO_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_PC_UPGRADE);
                break;
            }
            setResult(RESULT_OK, result);
            finishWithAnimation(false);
        } else {
            Log.i(AnkiDroidApp.TAG, "Info - onBackPressed()");
            setResult(RESULT_CANCELED);
            finishWithAnimation();
        }
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

---

From source file:com.hichinaschool.flashcards.anki.Info.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
        if (mType == TYPE_SHARED_DECKS && mWebView.canGoBack()) {
            mWebView.goBack();/*from   w w w  .  j av a2s. c  o m*/
        } else if (mType == TYPE_UPGRADE_DECKS && mUpgradeStage != UPGRADE_SCREEN_BASIC1) {
            Intent result = new Intent();
            result.putExtra(TYPE_ANIMATION_RIGHT, true);
            switch (mUpgradeStage) {
            case UPGRADE_SCREEN_BASIC2:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC1);
                break;

            case UPGRADE_SCREEN_MORE_OPTIONS:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC1);
                break;

            case UPGRADE_SCREEN_WEB_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_PC_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_MANUAL_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_BASIC2);
                break;

            case UPGRADE_SCREEN_AUTO_UPGRADE:
                result.putExtra(TYPE_UPGRADE_STAGE, UPGRADE_SCREEN_PC_UPGRADE);
                break;
            }
            setResult(RESULT_OK, result);
            finishWithAnimation(false);
        } else {
            // Log.i(AnkiDroidApp.TAG, "Info - onBackPressed()");
            setResult(RESULT_CANCELED);
            finishWithAnimation();
        }
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

---

From source file:com.borax12.materialdaterangepicker.time.TimePickerDialog.java

/**
 * For keyboard mode, processes key events.
 * @param keyCode the pressed key.//ww  w  .j  a v a 2s .  c o m
 * @return true if the key was successfully processed, false otherwise.
 */
private boolean processKeyUp(int keyCode) {
    if (keyCode == KeyEvent.KEYCODE_ESCAPE || keyCode == KeyEvent.KEYCODE_BACK) {
        if (isCancelable())
            dismiss();
        return true;
    } else if (keyCode == KeyEvent.KEYCODE_TAB) {
        if (mInKbMode) {
            if (isTypedTimeFullyLegal()) {
                finishKbMode(true);
            }
            return true;
        }
    } else if (keyCode == KeyEvent.KEYCODE_ENTER) {
        if (mInKbMode) {
            if (!isTypedTimeFullyLegal()) {
                return true;
            }
            finishKbMode(false);
        }
        if (mCallback != null) {
            mCallback.onTimeSet(mTimePicker, mTimePicker.getHours(), mTimePicker.getMinutes(),
                    mTimePickerEnd.getHours(), mTimePickerEnd.getMinutes());
        }
        dismiss();
        return true;
    } else if (keyCode == KeyEvent.KEYCODE_DEL) {
        if (mInKbMode) {
            if (!mTypedTimes.isEmpty()) {
                int deleted = deleteLastTypedKey();
                String deletedKeyStr;
                if (deleted == getAmOrPmKeyCode(AM)) {
                    deletedKeyStr = mAmText;
                } else if (deleted == getAmOrPmKeyCode(PM)) {
                    deletedKeyStr = mPmText;
                } else {
                    deletedKeyStr = String.format("%d", getValFromKeyCode(deleted));
                }
                if (tabHost.getCurrentTab() == 0) {
                    Utils.tryAccessibilityAnnounce(mTimePicker,
                            String.format(mDeletedKeyFormat, deletedKeyStr));
                } else {
                    Utils.tryAccessibilityAnnounce(mTimePickerEnd,
                            String.format(mDeletedKeyFormat, deletedKeyStr));
                }

                updateDisplay(true);
            }
        }
    } else if (keyCode == KeyEvent.KEYCODE_0 || keyCode == KeyEvent.KEYCODE_1 || keyCode == KeyEvent.KEYCODE_2
            || keyCode == KeyEvent.KEYCODE_3 || keyCode == KeyEvent.KEYCODE_4 || keyCode == KeyEvent.KEYCODE_5
            || keyCode == KeyEvent.KEYCODE_6 || keyCode == KeyEvent.KEYCODE_7 || keyCode == KeyEvent.KEYCODE_8
            || keyCode == KeyEvent.KEYCODE_9
            || (!mIs24HourMode && (keyCode == getAmOrPmKeyCode(AM) || keyCode == getAmOrPmKeyCode(PM)))) {
        if (!mInKbMode) {
            if (mTimePicker == null) {
                // Something's wrong, because time picker should definitely not be null.
                Log.e(TAG, "Unable to initiate keyboard mode, TimePicker was null.");
                return true;
            }
            mTypedTimes.clear();
            tryStartingKbMode(keyCode);
            return true;
        }
        // We're already in keyboard mode.
        if (addKeyIfLegal(keyCode)) {
            updateDisplay(false);
        }
        return true;
    }
    return false;
}

---

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