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.

Click Source Link

Document

Key code constant: Back key.

Usage

From source file:com.moodmap.HomeActivity.java

@Override
public boolean onKeyDown(int keyCode, android.view.KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        // Kill the app from back on Mood Entry, it is topmost.
        // Needed because a notification open can cause back to point to
        // weird places. - STC 12/27/11
        this.finish();

        return true;
    }// w  w w.j a  v a 2  s  .co  m
    return false;
}

From source file:com.example.photoremark.MainActivity.java

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
    if (event.getAction() == KeyEvent.ACTION_DOWN) {
        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
            onExit();/*  www  .  ja  v  a 2  s  .c  o  m*/
        }
    }
    return true;
}

From source file:com.google.zxing.client.android.CaptureActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    switch (keyCode) {
    case KeyEvent.KEYCODE_BACK:
        if (source == IntentSource.NATIVE_APP_INTENT) {
            setResult(RESULT_CANCELED);/* w w w .java  2s  . co  m*/
            finish();
            return true;
        }
        break;
    case KeyEvent.KEYCODE_FOCUS:
    case KeyEvent.KEYCODE_CAMERA:
        // Handle these events so they don't launch the Camera app
        return true;
    // Use volume up/down to turn on light
    case KeyEvent.KEYCODE_VOLUME_DOWN:
        cameraManager.setTorch(false);
        return true;
    case KeyEvent.KEYCODE_VOLUME_UP:
        cameraManager.setTorch(true);
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

From source file:es.uja.photofirma.android.SignUpActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        finish();/*from ww w.  j a  va2s .c o  m*/
        overridePendingTransition(R.anim.right_in, R.anim.right_out);
    }
    return false;// super.onKeyDown(keyCode, event);
}

From source file:edu.cmu.cs.cloudlet.android.CloudletActivity.java

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        new AlertDialog.Builder(CloudletActivity.this).setTitle("Exit").setMessage("Finish Application")
                .setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        moveTaskToBack(true);
                        finish();//  w  ww.ja va 2 s .c om
                    }
                }).setNegativeButton("Cancel", null).show();
    }
    return super.onKeyDown(keyCode, event);
}

From source file:com.android.tv.tuner.setup.TunerSetupActivity.java

@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        FragmentManager manager = getFragmentManager();
        int count = manager.getBackStackEntryCount();
        if (count > 0) {
            String lastTag = manager.getBackStackEntryAt(count - 1).getName();
            if (ScanResultFragment.class.getCanonicalName().equals(lastTag) && count >= 2) {
                // Pops fragment including ScanFragment.
                manager.popBackStack(manager.getBackStackEntryAt(count - 2).getName(),
                        FragmentManager.POP_BACK_STACK_INCLUSIVE);
                return true;
            } else if (ScanFragment.class.getCanonicalName().equals(lastTag)) {
                mLastScanFragment.finishScan(true);
                return true;
            }/*from ww w  .ja va2 s.c o  m*/
        }
    }
    return super.onKeyUp(keyCode, event);
}

From source file:com.conduit.plastic.ui.main.activity.MainActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    long secondTime = System.currentTimeMillis();
    if (keyCode == KeyEvent.KEYCODE_BACK) {

        if (mAlertDialog != null && mAlertDialog.isShowing()) {
            Toast.makeText(MainActivity.this, "", Toast.LENGTH_SHORT).show();
        } else {/*from  w  ww .j a va2s.c  o m*/
            if (secondTime - firstTime < 2000) {
                System.exit(0);
            } else {
                Toast.makeText(MainActivity.this, "??", Toast.LENGTH_SHORT).show();
                firstTime = System.currentTimeMillis();
            }
        }

        return true;
    }
    return super.onKeyDown(keyCode, event);
}

From source file:ael.com.loterias.c_login.java

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

    if (keyCode == KeyEvent.KEYCODE_BACK) {
        c_logging.getInstance().log(c_logging.LOG_INFO, getString(R.string.st_la_Exit));
        PRC_INTENTAR_SALIR();/*  www  . j  a  v a2  s .  c o  m*/
        // Si el listener devuelve true, significa que el evento esta
        // procesado, y nadie debe hacer nada mas
        return true;
    }
    // para las demas cosas, se reenvia el evento al listener habitual
    return super.onKeyDown(keyCode, event);
}

From source file:org.esupportail.nfctagdroid.NfcTacDroidActivity.java

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        new AlertDialog.Builder(this).setIcon(android.R.drawable.ic_dialog_alert).setTitle(R.string.exit)
                .setMessage(R.string.msg_exit)
                .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {
                    @Override/*from   w  w w .  j av a  2  s . co  m*/
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                        Process.killProcess(Process.myPid());
                        System.exit(1);
                    }

                }).setNegativeButton(R.string.no, null).show();
    }
    return true;
}

From source file:com.app.blockydemo.ui.ScriptActivity.java

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
    //Dismiss ActionMode without effecting checked items

    FormulaEditorVariableListFragment formulaEditorVariableListFragment = (FormulaEditorVariableListFragment) getSupportFragmentManager()
            .findFragmentByTag(FormulaEditorVariableListFragment.VARIABLE_TAG);

    if (formulaEditorVariableListFragment != null) {
        if (formulaEditorVariableListFragment.isVisible()) {
            ListAdapter adapter = formulaEditorVariableListFragment.getListAdapter();
            ((ScriptActivityAdapterInterface) adapter).clearCheckedItems();
            return super.dispatchKeyEvent(event);
        }//from w  w  w  .  jav  a 2  s.  c  o  m
    }

    if (currentFragment != null && currentFragment.getActionModeActive()) {
        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
            ListAdapter adapter = null;
            if (currentFragment instanceof ScriptFragment) {
                adapter = ((ScriptFragment) currentFragment).getAdapter();
            } else {
                adapter = currentFragment.getListAdapter();
            }
            ((ScriptActivityAdapterInterface) adapter).clearCheckedItems();
        }
    }

    return super.dispatchKeyEvent(event);
}

Example usage for android.view KeyEvent KEYCODE_BACK

Introduction

Prototype

Document

Usage