Example usage for android.view KeyEvent KEYCODE

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.

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Document

Key code constant: Back key.

Usage

From source file:com.hellofyc.base.app.activity.BaseActivity.java

@Override
public boolean dispatchKeyEvent(@NonNull KeyEvent event) {
    final int keyCode = event.getKeyCode();
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        if (mPressTwoExit && mIsHighPriority) {
            final int action = event.getAction();
            if (action == KeyEvent.ACTION_UP) {
                pressBackToExit();/*from   w ww . j  a  v a2 s  .c o m*/
                return true;
            }
        }
    }
    return super.dispatchKeyEvent(event);
}

From source file:ch.luklanis.esscan.history.HistoryActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        PsDetailFragment oldFragment = (PsDetailFragment) getFragmentManager()
                .findFragmentById(R.id.ps_detail_container);
        if (oldFragment != null) {
            int error = oldFragment.save();

            if (error > 0) {
                setCancelOkAlert(error, true);
                return true;
            }//from w  w  w.  j  a  v a 2 s.  co m
        }
    }

    return super.onKeyDown(keyCode, event);
}

From source file:com.haibison.android.lockpattern.LockPatternFragment.java

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && ACTION_COMPARE_PATTERN.equals(fa.getIntent().getAction())) {
        /*/*from   w  w w  .j  a va2  s .  c  o m*/
         * Use getActivity() hook instead of onBackPressed(), because onBackPressed()
         * is not available in API 4.
         */
        finishWithNegativeResult(fa.RESULT_CANCELED);
        return true;
    }

    return fa.onKeyDown(keyCode, event);
}

From source file:com.CrestronXPanelApp.CrestronXPanelApp.java

@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
        if (event.getRepeatCount() == 0 && specialList.containsKey("sideup")) {
            sendDigitalListMessage(specialList.get("sideup"), 0);
        }//from   w  ww. jav a2  s  . c  o m
        return true;
    }
    if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
        if (event.getRepeatCount() == 0 && specialList.containsKey("sidedown")) {
            sendDigitalListMessage(specialList.get("sidedown"), 0);
        }
        return true;
    }
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        this.finish();
    }
    return super.onKeyDown(keyCode, event);
}

From source file:com.example.android.foodrecipes.app.RecipeDetailsFragment.java

private void removeCurrentRecipeFromFavorites() {
    String title = getActivity().getString(R.string.text_please_wait);
    String text = getActivity().getString(R.string.text_removing_from_favorites);

    final ProgressDialog dialog = ProgressDialog.show(getActivity(), title, text);
    dialog.show();/*from  w  w  w  .jav  a 2  s  . com*/

    final AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() {
        @Override
        protected Void doInBackground(Void... params) {
            String where = RecipeContract.RecipeEntry.COLUMN_EXTERNAL_ID + "=?";
            String[] selectionArgs = new String[] { String.valueOf(mRecipe.getExternalId()) };
            getActivity().getContentResolver().delete(CONTENT_URI, where, selectionArgs);
            return null;
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            dialog.dismiss();
            Toast.makeText(getActivity(), getActivity().getString(R.string.recipe_removed_from_favorites),
                    Toast.LENGTH_SHORT).show();

            if (!mTwoPane) {
                // if we operate in the two pane mode we should not finish the activity as
                // we have only one activity, but with two fragments inside
                getActivity().finish();
            }
        }
    };

    dialog.setOnKeyListener(new Dialog.OnKeyListener() {
        @Override
        public boolean onKey(DialogInterface dialogInterface, int keyCode, KeyEvent event) {
            if (keyCode == KeyEvent.KEYCODE_BACK) {
                task.cancel(true);
                dialog.dismiss();
            }
            return true;
        }
    });

    task.execute();
}

From source file:com.olearyp.gusto.Expsetup.java

@Override
public boolean onKeyDown(final int keyCode, final KeyEvent event) {
    // TODO Auto-generated method stub
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        final String reboot_type = getSharedPreferences("serverState", Context.MODE_PRIVATE)
                .getString("serverState", "none");
        if (reboot_type.equals(getString(R.string.reboot_manual_flash_required))) {
            rebootDialog(R.string.reboot_alert_title, R.string.reboot_reflash_msg, R.string.reboot_recovery,
                    true).show();/*from w  w  w  .ja v a 2 s  .  c  om*/
            return true;
        } else if (reboot_type.equals(getString(R.string.reboot_recovery_required))) {
            rebootDialog(R.string.reboot_alert_title, R.string.reboot_autoflash_msg, R.string.reboot_recovery,
                    true).show();
            return true;
        } else if (reboot_type.equals(getString(R.string.reboot_required))) {
            rebootDialog(R.string.reboot_alert_title, R.string.reboot_request_msg, R.string.reboot, true)
                    .show();
            return true;
        }
    }
    return super.onKeyDown(keyCode, event);
}

From source file:com.njlabs.amrita.aid.aums.AumsActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        exitAums();/*from   w w w.  j a  v  a  2s. c  o m*/
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

From source file:com.safecell.AccountFormActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {

    if (keyCode == KeyEvent.KEYCODE_BACK) {

        Intent intent = new Intent(AccountFormActivity.this, TrialOrAlreadyAccountActivity.class);
        startActivity(intent);//from   w w  w .j ava  2s.  com
        finish();
    }
    return super.onKeyDown(keyCode, event);
}

From source file:com.example.angel.parkpanda.MainActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
        switch (event.getAction()) {
        case KeyEvent.ACTION_DOWN:
            if (event.getDownTime() - lastPressedTime < PERIOD) {
                System.exit(0);/* www  .ja v a 2 s .  c o m*/
                finish();

            } else {
                Toast.makeText(getApplicationContext(), "Press again to exit.", Toast.LENGTH_SHORT).show();
                lastPressedTime = event.getEventTime();
            }
            return true;
        }
    }
    return false;
}

From source file:com.hippo.widget.BothScrollView.java

/**
 * You can call this function yourself to have the scroll view perform
 * scrolling from a key event, just as if the event had been dispatched to
 * it by the view hierarchy./*from w w  w .j  a  v a2 s  . c  o  m*/
 *
 * @param event The key event to execute.
 * @return Return true if the event was handled, else false.
 */
public boolean executeKeyEvent(KeyEvent event) {
    mTempRect.setEmpty();

    if (!canScrollHorizontally()) {
        if (isFocused() && event.getKeyCode() != KeyEvent.KEYCODE_BACK) {
            View currentFocused = findFocus();
            if (currentFocused == this) {
                currentFocused = null;
            }
            View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, View.FOCUS_RIGHT);
            return nextFocused != null && nextFocused != this && nextFocused.requestFocus(View.FOCUS_RIGHT);
        }
        return false;
    }

    if (!canScrollVertically()) {
        if (isFocused() && event.getKeyCode() != KeyEvent.KEYCODE_BACK) {
            View currentFocused = findFocus();
            if (currentFocused == this) {
                currentFocused = null;
            }
            View nextFocused = FocusFinder.getInstance().findNextFocus(this, currentFocused, View.FOCUS_DOWN);
            return nextFocused != null && nextFocused != this && nextFocused.requestFocus(View.FOCUS_DOWN);
        }
        return false;
    }

    boolean handled = false;
    if (event.getAction() == KeyEvent.ACTION_DOWN) {
        switch (event.getKeyCode()) {
        case KeyEvent.KEYCODE_DPAD_LEFT:
            if (!event.isAltPressed()) {
                handled = arrowScrollHorizontally(View.FOCUS_LEFT);
            } else {
                handled = fullScroll(View.FOCUS_LEFT);
            }
            break;
        case KeyEvent.KEYCODE_DPAD_RIGHT:
            if (!event.isAltPressed()) {
                handled = arrowScrollHorizontally(View.FOCUS_RIGHT);
            } else {
                handled = fullScroll(View.FOCUS_RIGHT);
            }
            break;
        case KeyEvent.KEYCODE_DPAD_UP:
            if (!event.isAltPressed()) {
                handled = arrowScrollVertically(View.FOCUS_UP);
            } else {
                handled = fullScroll(View.FOCUS_UP);
            }
            break;
        case KeyEvent.KEYCODE_DPAD_DOWN:
            if (!event.isAltPressed()) {
                handled = arrowScrollVertically(View.FOCUS_DOWN);
            } else {
                handled = fullScroll(View.FOCUS_DOWN);
            }
            break;
        case KeyEvent.KEYCODE_SPACE:
            if (event.isCtrlPressed()) {
                pageScroll(event.isShiftPressed() ? View.FOCUS_LEFT : View.FOCUS_RIGHT);
            } else {
                pageScroll(event.isShiftPressed() ? View.FOCUS_UP : View.FOCUS_DOWN);
            }
            break;
        }
    }

    return handled;
}

Example usage for android.view KeyEvent KEYCODE_BACK

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Prototype

Document

Usage