ListView add item click item basic Android example code
Definition of ListView in layout main.xml file Android example
Code in Main.java ListView example source code Java Android
<ListView android:id="@+id/idListView"
android:background="#7700CC00"
android:layout_height="wrap_content"
android:layout_width="fill_parent" />
Code in Main.java ListView example source code Java Android
public class Main extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView mlistView = (ListView) findViewById(R.id.idListView);
mlistView.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,
new String[] {"Game", "Help", "Home site"}));
mlistView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text Game, Help, Home
Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
Toast.LENGTH_SHORT).show();
}
});
}
}
396LW NO topic_id
AD
Další témata ....(Topics)
Read file from URL to array of byte and convert to UTF-8 String Android examle source code.
URL urlLoc = new URL("//myweb.com/myfile.html");
URLConnection conexion = urlLoc.openConnection();
conexion.setConnectTimeout(4000);
conexion.setReadTimeout(1000);
conexion.connect();
// downlod the file
InputStream input = new BufferedInputStream(urlLoc
.openStream());
StringBuffer responseBuffer = new StringBuffer();
byte[] byteArray = new byte[1024];
while (input.read(byteArray) != -1)
{
String res = new String(byteArray, "UTF-8");
responseBuffer.append(res);
byteArray = null;
byteArray = new byte[1024];
}
String response = responseBuffer.toString().trim();
Bitmap size calculation:
bmpHeight * bmpWidth
For example:
Resolution of image 1024x860 = 880 640 pixels
If every pixel get 4 byte of memory:
880 640x4= 3 522 560 (3.5MB)
Get bitmap size without allocation of memory:
Get Memory size:
Make your bitmap not bigger as maxMemory size
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
bmpHeight * bmpWidth
For example:
Resolution of image 1024x860 = 880 640 pixels
If every pixel get 4 byte of memory:
880 640x4= 3 522 560 (3.5MB)
Get bitmap size without allocation of memory:
BitmapFactory.Options options = new BitmapFactory.Options();
// If set to true, the decoder will return null (no bitmap), but the out... fields will still
// be set, allowing the caller to query the bitmap without having to allocate the memory for its pixels.
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(getResources(), R.drawable.my_image, options);
int imageHeight = options.outHeight; // 1024
int imageWidth = options.outWidth; // 860
String imageType = options.outMimeType; // .jpg .png .gif
Get Memory size:
Make your bitmap not bigger as maxMemory size
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
float density = getResources().getDisplayMetrics().density;
Debug.MemoryInfo memoryInfo = new Debug.MemoryInfo();
Debug.getMemoryInfo(memoryInfo);
final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
final int freeMemory = (int) (Runtime.getRuntime().freeMemory() / 1024);
String memMessage = String.format(
"Free=%d kB,
MaxMem=%d kB,
Memory: Pss=%.2f MB, Private=%.2f MB, Shared=%.2f MB",
freeMemory,
maxMemory,
memoryInfo.getTotalPss() / 1024.0,
memoryInfo.getTotalPrivateDirty() / 1024.0,
memoryInfo.getTotalSharedDirty() / 1024.0);
((TextView)findViewById(R.id.textViewInfo)).setText(memMessage );
public class MainClass extends Activity {
ActivityManager activityManager;
MemoryInfo memoryInfo;
final String TAG = "MemInfo";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
memoryInfo = new ActivityManager.MemoryInfo();
activityManager.getMemoryInfo(memoryInfo);
Log.i(TAG, " memoryInfo.availMem " + memoryInfo.availMem);
Log.i(TAG, " memoryInfo.lowMemory " + memoryInfo.lowMemory);
Log.i(TAG, " memoryInfo.threshold " + memoryInfo.threshold);
Toast.makeText(getApplicationContext(), String.valueOf( memoryInfo.availMem), Toast.LENGTH_LONG)
.show();
} // end onCreate
}
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

Open your workspace folder and subfolder .metadata:
C:\Users\workspace\.metadata\
Delete .lock file
C:\Users\workspace\.metadata\
Delete .lock file
Editace: 2011-09-16 11:48:11
Počet článků v kategorii: 396
Url:listview-add-item-click-item-basic-android-example-code