Java tutorial
/** * Copyright 2014 Costa Zervos * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package ca.ualberta.cmput301.as1.czervos_notes; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.EditText; import android.support.v4.app.NavUtils; import android.annotation.TargetApi; import android.content.Intent; import android.os.Build; /** * Activity that allows user to create a new counter. Allows user to input * the name of a new counter and then add it to the list of counters. * @author Costa Zervos */ public class AddCounterActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_add_counter); // Show the Up button in the action bar. setupActionBar(); } /** * Set up the {@link android.app.ActionBar}, if the API is available. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) private void setupActionBar() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { getActionBar().setDisplayHomeAsUpEnabled(true); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.add_counter, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: // This ID represents the Home or Up button. In the case of this // activity, the Up button is shown. Use NavUtils to allow users // to navigate up one level in the application structure. For // more details, see the Navigation pattern on Android Design: // // http://developer.android.com/design/patterns/navigation.html#up-vs-back // NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } /** * Creates a counter using the name input by the user and bundles the * counter to send back to the main activity (CounterListActivity). * @param view */ public void createCounter(View view) { CounterModel newCounter; EditText editText = (EditText) findViewById(R.id.enter_counter_name); // Retrieves EditText's text input and converts to a string String counterName = editText.getText().toString(); newCounter = new CounterModel(counterName); Intent intent = new Intent(this, CounterListActivity.class); Bundle bundle = new Bundle(); // Bundles newly created counter bundle.putSerializable("newCounter", newCounter); intent.putExtras(bundle); startActivity(intent); } }