/*
* 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 app.test;
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 Test extends Activity {
static final private int BACK_ID = Menu.FIRST;
static final private int CLEAR_ID = Menu.FIRST + 1;
private EditText mEditor;
public Test() {
}
/** 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("");
}
};
}
//
//res\layout\skeleton_activity.xml
android:layout_width="match_parent" android:layout_height="match_parent"
android:orientation="vertical">
android:layout_width="match_parent" android:layout_height="0dip"
android:autoText="true"
android:capitalize="sentences"
android:layout_weight="1"
android:freezesText="true" >
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_gravity="center_vertical" android:gravity="center_horizontal"
android:orientation="horizontal"
android:background="@drawable/semi_black">
android:text="@string/back" />
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:paddingLeft="4dip" android_paddingRight="4dip"
android:src="@drawable/violet" />
android:text="@string/clear" android:textColor="@color/red" />
//
//res\values\colors.xml
#f00
#80000000
//res\values\strings.xml
Skeleton App
Back
Clear
Hello there, you Activity!
//res\values\styles.xml
wrap_content
wrap_content
@style/TextAppearance.ActionButton
italic