Android Widget OnClick Example

Difference between "@+id/” and "@id/” in Android
android:id="@+id/xxx" unique identifier of view
@id/ a reference to the unique identifier

 <TextView
        android:id="@+id/first_element_id"
        .........
 />
    <TextView
        android:id="@+id/second_element_id"
        android:layout_below="@id/first_element_id"
        ..........
 />

Html.fromHtml(), setText(), textView.setText(Html.fromHtml(String htmlFormat)), Android example.

TextView mIdTextOk = (TextView)findViewById(R.id.idTextOk);
int _nOk = 57;
// number 57 will bold style
mIdTextOk.setText(Html.fromHtml( "OK: "+"<b>"+_nOk+"</b>")); 

Basic shortcuts for Android Emulator.

Emulated Device Key	Keyboard Key
Home	HOME
Menu (left softkey)	F2 or Page-up button
Star (right softkey)	Shift-F2 or Page Down
Back	ESC
Call/dial button	F3
Hangup/end call button	F4
Search	F5
Power button	F7
Audio volume up button	KEYPAD_PLUS, Ctrl-5
Audio volume down button	KEYPAD_MINUS, Ctrl-F6
Camera button	Ctrl-KEYPAD_5, Ctrl-F3
Switch to previous layout orientation (for example, portrait, landscape)	KEYPAD_7, Ctrl-F11
Switch to next layout orientation (for example, portrait, landscape)	KEYPAD_9, Ctrl-F12
Toggle cell networking on/off	F8
Toggle code profiling	F9 (only with -trace startup option)
Toggle fullscreen mode	Alt-Enter
Toggle trackball mode	F6
Enter trackball mode temporarily (while key is pressed)	Delete
DPad left/up/right/down	KEYPAD_4/8/6/2
DPad center click	KEYPAD_5
Onion alpha increase/decrease	KEYPAD_MULTIPLY(*) / KEYPAD_DIVIDE(/)

More about Android Emulator

Brand	Motorola
Model (codename)	Droid Razr
Price (cena, včetně DPH v KCZ)	10800 / 06.2012
Display size in Inch (v palcích)	4.3
Display-resolution	540x960
Dotek-typ	capacitive
CPU typ	TI 4430
CPU MHz	1.2 GB
CPU core	2
L2 cache
RAM	1024
ROM	15600
GPU	SGX540
NenaMark2 Benchmark
GPU-GLBenchmark	3299
Baterie mAh	1780
Foto MPx	8
Autofocus	AF
Video	HD video 30 frames/s
Official Android ICS	Google Android 2.3.5 (Gingerbread)
CyanogenMod support
Dotek-prstů-max	10
Display-ppi	256
Display-retina	79%
Networks
Connectivity	GSM: 850/900/1800/1900 MHz, EDGE, GPRS 3G: 900/2100 MHz, HSDPA, HSUPA, HSPA+ Bluetooth: 4.0 (EDR, A2DP, FTP, PBAP, AVRCP) Wi-Fi: 802.11b/g/n PC: microUSB, USB 2.0, microHDMI Senzors: proximity, gyroskop, akcelerometr GPS: yes, A-GPS, digital compas
Note	Super AMOLED Display

Motorola Droid Razr image

Try this code:

final String ERROR = "my error message....";

 private class DownloadWebPageTask extends AsyncTask<String, Void, String> {
// some code and method ..... see AsyncTask

       @Override
        protected String doInBackground(String... urls) {

              URL urlL = null;
                try {
                    urlL = new URL(url);//"//chmi.cz..../"
                    HttpURLConnection urlConnection = null;
                    try {
                         urlConnection = (HttpURLConnection) urlL.openConnection();
                        InputStream in = new BufferedInputStream(urlConnection.getInputStream());
                      response =  readStream(in);
                        return response;
                    } catch (IOException e) {
                        //throw new RuntimeException(e);

                    } finally {
                        if(urlConnection != null)
                            urlConnection.disconnect();
                        return ERROR;
                    }
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                    return ERROR;
                }
           }
            return response;
        }

        private String readStream(InputStream is) {
            try {
                ByteArrayOutputStream bo = new ByteArrayOutputStream();
                int i = is.read();
                while(i != -1) {
                    bo.write(i);
                    i = is.read();
                }
                return bo.toString();
            } catch (IOException e) {
                return "";
            }
        }