Import Android.App.Activity;

Lunes 31 enero 2011

Keyboarding

package cis493.keyboarding;

import android.app.Activity;

import android.os.Bundle;

import android.widget.EditText;

import android.widget.Toast;

public class SimpleKeybording extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

try {

super.onCreate(savedInstanceState);

setContentView(R.layout.main1);// try main2, main3

} catch (Exception e) {

// TODO Auto-generated catch block

Toast.makeText(getApplicationContext(),e.getMessage(), 1).show();

}

Main1.xml

<?xmlversion="1.0"encoding="utf-8"?>

LinearLayout

android:id="@+id/widget31"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:background="#ffcccccc"

android:orientation="vertical"

xmlns:android="

TextView

android:id="@+id/caption"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:background="#ff0000ff"

android:text="inputType: text|textCapWords"

android:textStyle="bold"

android:textSize="22sp" />

EditText

android:id="@+id/txtData"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:padding="10px"

android:textSize="18sp"

android:inputType="text|textCapWords" />

</LinearLayout

Main2.xml

<?xmlversion="1.0"encoding="utf-8"?>

LinearLayout

android:id="@+id/widget31"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:background="#ffcccccc"

android:orientation="vertical"

xmlns:android="

TextView

android:id="@+id/caption"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:background="#ff0000ff"

android:text="inputType: number|numberSigned|numberDecimal"

android:textStyle="bold"

android:textSize="22sp"

</TextView

EditText

android:id="@+id/txtData"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:padding="10px"

android:textSize="18sp"

android:inputType="number|numberSigned"

</EditText

</LinearLayout

Main3.xml

<?xmlversion="1.0"encoding="utf-8"?>

LinearLayout

android:id="@+id/widget31"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:background="#ffcccccc"

android:orientation="vertical"

xmlns:android="

TextView

android:id="@+id/caption"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:background="#ff0000ff"

android:textStyle="bold"

android:textSize="22sp"

android:text="inputType: date"

</TextView

EditText

android:id="@+id/txtData"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:padding="10px"

android:textSize="18sp"

android:inputType="date"

</EditText

</LinearLayout

TEXT WATCHER

<?xmlversion="1.0"encoding="utf-8"?>

LinearLayoutxmlns:android="

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:background="#ffaabbcc"

EditText

android:id="@+id/txtInput"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_margin="10px"

android:padding="4px"

android:textStyle="bold"

TextView

android:id="@+id/txtMsg"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_margin="10px"

android:padding="4px"

android:background="#ff0000ff"

android:textStyle="bold"

</LinearLayout

CODE

// demonstrate the use of a simple TEXTWATCHER control

package cis493.keyboarding;

import android.app.Activity;

import android.os.Bundle;

import android.text.Editable;

import android.text.TextWatcher;

import android.widget.EditText;

import android.widget.TextView;

publicclass TextWatcherDemo extends Activity {

EditText txtInput;

TextView txtMsg;

intkeyCount = 0;

@Override

publicvoid onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main1);

txtMsg = (TextView)findViewById(R.id.txtMsg);

txtInput = (EditText)findViewById(R.id.txtInput);

// ------

txtInput.addTextChangedListener(new TextWatcher() {

String msg;

publicvoid afterTextChanged(Editable arg0) {

msg = "count: " + txtInput.getText().toString().length()

+ " " + arg0.toString();

txtMsg.setText( msg );

}

publicvoid beforeTextChanged(CharSequence arg0, int arg1,

int arg2, int arg3) {

//Toast.makeText(getApplicationContext(), "BTC " + arg0, 1).show();

}

publicvoid onTextChanged(CharSequence arg0, int arg1, int arg2,

int arg3) {

//Toast.makeText(getApplicationContext(), "OTC " + arg0, 1).show();

}

}); //addTextChangedListener

// ------

}//textWatcher

}//class

FONTS

<?xmlversion="1.0"encoding="utf-8"?>

TableLayout

android:id="@+id/myTableLayout"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical"

android:stretchColumns="1"

xmlns:android="

TableRow

android:id="@+id/myRow1"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="horizontal"

TextView

android:id="@+id/labelSans"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:background="#ff006666"

android:layout_marginRight="24px"

android:text="sans:"

android:textSize="20sp"

</TextView

TextView

android:id="@+id/sans"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Hello, world!"

android:textSize="20sp"

android:typeface="sans"

</TextView

</TableRow

TableRow

android:id="@+id/myRow2"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="horizontal"

TextView

android:id="@+id/labelSerif"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginRight="24px"

android:text="serif:"

android:textSize="20sp"

android:background="#ff006666"

</TextView

TextView

android:id="@+id/serif"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Hello, world!"

android:textSize="20sp"

android:typeface="serif"

</TextView

</TableRow

TableRow

android:id="@+id/myRow3"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="horizontal"

TextView

android:id="@+id/labelMonospace"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginRight="24px"

android:text="monospace:"

android:textSize="20sp"

android:background="#ff006666"

</TextView

TextView

android:id="@+id/monospace"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Hello, world!"

android:textSize="20sp"

android:typeface="monospace"

</TextView

</TableRow

TableRow

android:id="@+id/myRow4"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="horizontal"

TextView

android:id="@+id/labelCustom"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginRight="24px"

android:text="custom:"

android:textSize="20sp"

android:background="#ff006666"

</TextView

TextView

android:id="@+id/custom"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Hello, world!"

android:textSize="20sp"

</TextView

</TableRow

</TableLayout

Code

// demonstrates basic use of FONTS

package cis493.androfontsdemo;

import android.app.Activity;

import android.graphics.Typeface;

import android.os.Bundle;

import android.widget.TextView;

publicclass AndroFontDemo extends Activity {

@Override

publicvoid onCreate(Bundle icicle) {

super.onCreate(icicle);

setContentView(R.layout.main);

// bind the "custom" textview with chosen font

TextView tvCustom=(TextView)findViewById(R.id.custom);

Typeface myNewFace=Typeface.createFromAsset(getAssets(),

"fonts/Jokerman.TTF");

tvCustom.setTypeface(myNewFace);

}

WebView Simple URL

<?xmlversion="1.0"encoding="utf-8"?>

LinearLayoutxmlns:android="

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

WebView

android:id="@+id/webkit"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

</LinearLayout

package cis493.webviewdemo;

import android.os.Bundle;

import android.app.Activity;

import android.webkit.WebView;

public class WebView1 extends Activity {

WebView browser;

@Override

public void onCreate(Bundle icicle) {

super.onCreate(icicle);

setContentView(R.layout.main);

browser = (WebView) findViewById(R.id.webkit);

browser.loadUrl("

//browser.loadUrl("

browser.getSettings().setJavaScriptEnabled(true);

}

2. WebView – Passing Objects to JS

<?xmlversion="1.0"encoding="utf-8"?>

LinearLayout

xmlns:android="

android:orientation="horizontal"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

WebView

android:id="@+id/webview"

android:layout_width="fill_parent"

android:layout_height="fill_parent"/>

</LinearLayout

res/assets/my_local_page1.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<title>Android GeoWebOne Demo</title>

function whereami() {

document.getElementById("lat").innerHTML=locater.getLatitude();

document.getElementById("lon").innerHTML=locater.getLongitude();

var spy = "Spy data coming from HTML\n"

+ document.getElementById("lat").innerHTML

+ "\n"

+ document.getElementById("lon").innerHTML;

locater.setValue(spy);

}

function talkBack2Android() {

var spy = "Spy data coming from HTML\n"

+ "\n"

+ document.getElementById("myText").value

+ "\n"

+ document.getElementById("lat").innerHTML

+ "\n"

+ document.getElementById("lon").innerHTML;

locater.htmlPassing2Android(spy);

}

</script>

</head>

<body>

<tr>

<td bgcolor="#FFFFCC">Latitude</td>

<td<span id="lat">(unknown)</span</td>

</tr>

<tr>

<td bgcolor="#FFFFCC">Longitude</td>

<td<span id="lon">(unknown)</span</td>

</tr>

</table>

<p<a onClick="whereami()"<u>Click to Get Location</u</a</p>

<p> Enter some data here <input type="text" id="myText" />

</body>

</html>

// WEBVIEW2

// A WebView control is used to expose a locally held html page.

// An Android object is exposed to JS so data can be exchanged.

package ucr.webkit3;

import java.util.Random;

import android.app.Activity;

import android.content.Context;

import android.location.Criteria;

import android.location.Location;

import android.location.LocationListener;

import android.location.LocationManager;

import android.os.Bundle;

import android.webkit.WebView;

import android.widget.Toast;

public class Main extends Activity {

private WebView browser;

MyLocater locater = new MyLocater();

Location mostRecentLocation;

@Override

public void onCreate(Bundle icicle) {

super.onCreate(icicle);

setContentView(R.layout.main);

// get a location fix (lat, lon)

mostRecentLocation = fakeGetLocation();

// set up the webview to show location results

browser = (WebView) findViewById(R.id.webview);

browser.getSettings().setJavaScriptEnabled(true);

browser.addJavascriptInterface(locater, "locater");

browser.loadUrl("file:///android_asset/my_local_page1.html");

}

private Location fakeGetLocation() {

// faking the obtaining of a location object (discussed later!)

Location fake = new Location("fake");

Random generator = new Random();

double latSign = 1;

if ( generator.nextDouble() <= 0.5) latSign = -1;

fake.setLatitude(generator.nextDouble() * 90 * latSign);

double lonSign = 1;

if ( generator.nextDouble() <= 0.5) lonSign = -1;

fake.setLongitude(generator.nextDouble() * 180 * lonSign);

return fake;

}

// //////////////////////////////////////////////////////////////////

// An object of type "MyLocater" will be used to pass data back and

// forth between the Android app and the JS code behing the html page.

public class MyLocater {

public String spy = "XXX";

public double getLatitude() {

if (mostRecentLocation == null){

return (0);

}

else {

return mostRecentLocation.getLatitude();

}

public double getLongitude() {

if (mostRecentLocation == null){

return (0);

}

else {

return mostRecentLocation.getLongitude();

}

public void htmlPassing2Android(String dataFromHtml) {

// changes to the HTML place-holders lat & lon can

// be seen here. There is an HTML button that

// when clicked calls this Android method.

spy = dataFromHtml;

Toast.makeText(getApplicationContext(), spy, 1).show();

}

}//MyLocater

}

3. WebView – Google Maps V3

<?xmlversion="1.0"encoding="utf-8"?>

LinearLayout

xmlns:android="

android:orientation="horizontal"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

WebView

android:id="@+id/webview"

android:layout_width="fill_parent"

android:layout_height="fill_parent"/>

</LinearLayout

res/assests/webview_map.html

<!DOCTYPE html

<html>

<head>

html { height: 100% }

body { height: 100%; margin: 0px; padding: 0px }

#map_canvas { height: 100% }

</style>

src="

</script>

function initialize() {

varlatlng = new google.maps.LatLng(9.938095, -84.054433);

var myOptions = {

zoom: 15,

center: latlng,

mapTypeId: google.maps.MapTypeId.ROADMAP

};

var map = new google.maps.Map(document.getElementById("map_canvas"),

myOptions);

}

</script>

</head>

</body>

</html>

Add to Manifest

uses-permissionandroid:name="android.permission.INTERNET"/>

uses-permissionandroid:name="android.permission.ACCESS_COARSE_LOCATION"/>

Code

// WebView3

// Loads a local html file on a WebView. The html file contains

// a JS script method to show a Google Map V3 centered around

// UCR San Jose CR (zoom level 13/23, centered, sensor=true)

// The image on the phone is the same that would be displayed

// by a browser in other device (laptop, iPhone,...)

// ------

package ucr.googlemaps;

import android.app.Activity;

import android.os.Bundle;

import android.webkit.WebView;

public class Main extends Activity {

WebView browser;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

// connect browser to local html file defining mapping operation

browser = (WebView) findViewById(R.id.webview);

browser.getSettings().setJavaScriptEnabled(true);

browser.loadUrl("file:///android_assets/webview_map.html");

}

4. WebView – Google Maps V3 – Passing Object to JS (not show here)

// WEBVIEW4

// Uses Google Maps V3 JS scripting. A map is displayed on a WebView.

// Android code provides current device's location. This data is

// used to center a Google map on the given coordinates.

// (test with a real device)

Using Dialog Boxes

// create a simple dialog box (Yes/No/Cancel)

package cis493.selectionwidgets;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

publicclass AlertDialogDemo extends Activity {

Button btnGo;

EditText txtMsg;

String msg;

@Override

publicvoid onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

txtMsg = (EditText)findViewById(R.id.txtMsg);

btnGo = (Button) findViewById(R.id.btnGo);

btnGo.setOnClickListener(new OnClickListener() {

@Override

publicvoid onClick(View arg0) {

AlertDialog diaBox = makeDialogBox();

diaBox.show();

//WARNING: (in general...)

//after showing a dialog you should have NO more

//code. Let the buttons of the dialog box handle

//the rest of the logic. For instance, in this

//example a modal dialog box is displayed (once shown

//you can not do anything to the parent until the

//child is closed) however the code in the parent

//continues to execute after the show() method is

//called.

txtMsg.setText("I am here!");

}

});

}//onCreate

private AlertDialog makeDialogBox(){

AlertDialog myQuittingDialogBox =

new AlertDialog.Builder(this)

//set message, title, and icon

.setTitle("Terminator")

.setMessage("Are you sure that you want to quit?")

.setIcon(R.drawable.ic_menu_end_conversation)

//set three option buttons

.setPositiveButton("Yes", new DialogInterface.OnClickListener() {

publicvoid onClick(DialogInterface dialog, int whichButton) {

//whatever should be done when answering "YES" goes here

msg = "YES " + Integer.toString(whichButton);

txtMsg.setText(msg);

}

})//setPositiveButton

.setNeutralButton("Cancel",new DialogInterface.OnClickListener() {

publicvoid onClick(DialogInterface dialog, int whichButton) {

//whatever should be done when answering "CANCEL" goes here

msg = "CANCEL " + Integer.toString(whichButton);

txtMsg.setText(msg);

}//OnClick

})//setNeutralButton

.setNegativeButton("NO", new DialogInterface.OnClickListener() {

publicvoid onClick(DialogInterface dialog, int whichButton) {

//whatever should be done when answering "NO" goes here

msg = "NO " + Integer.toString(whichButton);

txtMsg.setText(msg);

}

})//setNegativeButton

.create();

return myQuittingDialogBox;

}

}//AndSelectionWidgets

main.xml

LinearLayout

android:id="@+id/LinearLayout01"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

xmlns:android="

android:orientation="horizontal"

Button

android:text="GO"

android:id="@+id/btnGo"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_margin="5px"/>

EditText

android:hint="click the button"

android:id="@+id/txtMsg"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_margin="5px" />

</LinearLayout