| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * 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 com.example.android.skeletonapp; |
| |
| import android.app.Activity; |
| import android.os.Bundle; |
| import android.view.KeyEvent; |
| import android.view.Menu; |
| import android.view.MenuItem; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.widget.Button; |
| import android.widget.EditText; |
| |
| /** |
| * This class provides a basic demonstration of how to write an Android |
| * activity. Inside of its window, it places a single view: an EditText that |
| * displays and edits some internal text. |
| */ |
| public class SkeletonActivity extends Activity { |
| |
| static final private int BACK_ID = Menu.FIRST; |
| static final private int CLEAR_ID = Menu.FIRST + 1; |
| |
| private EditText mEditor; |
| |
| public SkeletonActivity() { |
| } |
| |
| /** Called with the activity is first created. */ |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| // Inflate our UI from its XML layout description. |
| setContentView(R.layout.skeleton_activity); |
| |
| // Find the text editor view inside the layout, because we |
| // want to do various programmatic things with it. |
| mEditor = (EditText) findViewById(R.id.editor); |
| |
| // Hook up button presses to the appropriate event handler. |
| ((Button) findViewById(R.id.back)).setOnClickListener(mBackListener); |
| ((Button) findViewById(R.id.clear)).setOnClickListener(mClearListener); |
| |
| mEditor.setText(getText(R.string.main_label)); |
| } |
| |
| /** |
| * Called when the activity is about to start interacting with the user. |
| */ |
| @Override |
| protected void onResume() { |
| super.onResume(); |
| } |
| |
| /** |
| * Called when your activity's options menu needs to be created. |
| */ |
| @Override |
| public boolean onCreateOptionsMenu(Menu menu) { |
| super.onCreateOptionsMenu(menu); |
| |
| // We are going to create two menus. Note that we assign them |
| // unique integer IDs, labels from our string resources, and |
| // given them shortcuts. |
| menu.add(0, BACK_ID, 0, R.string.back).setShortcut('0', 'b'); |
| menu.add(0, CLEAR_ID, 0, R.string.clear).setShortcut('1', 'c'); |
| |
| return true; |
| } |
| |
| /** |
| * Called right before your activity's option menu is displayed. |
| */ |
| @Override |
| public boolean onPrepareOptionsMenu(Menu menu) { |
| super.onPrepareOptionsMenu(menu); |
| |
| // Before showing the menu, we need to decide whether the clear |
| // item is enabled depending on whether there is text to clear. |
| menu.findItem(CLEAR_ID).setVisible(mEditor.getText().length() > 0); |
| |
| return true; |
| } |
| |
| /** |
| * Called when a menu item is selected. |
| */ |
| @Override |
| public boolean onOptionsItemSelected(MenuItem item) { |
| switch (item.getItemId()) { |
| case BACK_ID: |
| finish(); |
| return true; |
| case CLEAR_ID: |
| mEditor.setText(""); |
| return true; |
| } |
| |
| return super.onOptionsItemSelected(item); |
| } |
| |
| /** |
| * A call-back for when the user presses the back button. |
| */ |
| OnClickListener mBackListener = new OnClickListener() { |
| public void onClick(View v) { |
| finish(); |
| } |
| }; |
| |
| /** |
| * A call-back for when the user presses the clear button. |
| */ |
| OnClickListener mClearListener = new OnClickListener() { |
| public void onClick(View v) { |
| mEditor.setText(""); |
| } |
| }; |
| } |