Random number Java
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Generate random number Android Java example source code.
Random rand = new Random();
int i = rand.nextInt() % 256; // range -255 +255
System.out.print(i + "
"); // -184
i = Math.abs(rand.nextInt() % 12); // range 0 +11
System.out.print(i); // 7
// Math.random() start with 0. e.g. 0.35981234
int nRan = (int) (Math.random()*10); // 0 - 10
// nextDouble(), nextFloat(), nextInt(), nextLong() returns 0 - 10
import java.util.Random;´
Random r = new Random();
int nRan = r.nextInt(); // 0 - 10
double dRan = r.nextDouble() * 10; // e.g. 7.496285271597397
nextDouble – return 0 - 1
nextFloat – same as double
nextInt – -2147483648 +2147483647
nextLong – -922337203685775808 +9223372036854775807
nextGaussian – 0.0 aberation 1.0.
397LW NO topic_id
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Další témata ....(Topics)
StringBuilder, res/raw folder, try catch finaly throws, BufferedReader, InputStream, openRawResource, getResources Android example
MainActivity.java
MainActivity.java
public class MainActivity extends Activity {
TextView txtV;
Context cntx;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
txtV = (TextView)findViewById(R.id.idLabel);
cntx = this;
try {
StringBuilder strBuilder = myFunction(cntx);
txtV.setText(strBuilder);
} catch (IOException e) {
e.printStackTrace();
}
}
private StringBuilder myFunction(Context context) throws IOException {
final Resources resources = context.getResources();
InputStream inputStream = resources.openRawResource(R.raw.my_file);
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder strBuild = new StringBuilder();
try {
String line;
while ((line = reader.readLine()) != null) {
strBuild.append(line);
}
} finally {
reader.close();
}
return strBuild;
}
}
InputStream, getResources(),openRawResource()
java.io.InputStream is;
is = context.getResources().openRawResource(R.drawable.my_image);
Drawable mDrawable = context.getResources().getDrawable(R.drawable.button);
mDrawable.setBounds(150, 20, 300, 100);
Drawable[] mDrawables;
int[] resIDs = new int[] {
R.drawable.btn_ok,
R.drawable.btn_storno,
R.drawable.btn_help
};
mDrawables = new Drawable[resIDs.length];
Drawable prev = mDrawable;
for (int i = 0; i < resIDs.length; i++) {
mDrawables[i] = context.getResources().getDrawable(resIDs[i]);
mDrawables[i].setDither(true);
addToTheRight(mDrawables[i], prev);
prev = mDrawables[i];
}
No executable code found at line ....
Try one from this solution:
1.) uninstall app from test device, try to debugg app
or
2.) open module gradle file and set minifyEnabled to false in debug condition
Try one from this solution:
1.) uninstall app from test device, try to debugg app
or
2.) open module gradle file and set minifyEnabled to false in debug condition
debug {
minifyEnabled false
}
static boolean mbThemeLight = false;
@Override
public void onCreate(Bundle savedInstanceState) {
if(mbThemeLight)
setTheme(android.R.style.Theme_Light);
super.onCreate(savedInstanceState);
// bla bla bla..........
}
private void switchTheme(){
mbThemeLight = true;
this.recreate();
}
| Brand | Samsung |
| Model (codename) | i9250 Galaxy Nexus |
| Cena, včetně DPH | 9000 |
| Veikost Displaye v palcích | 4.65 |
| Display-resolution | 1280x720 |
| Dotek-typ | kapacitní |
| CPU typ | |
| CPU MHz | 1200 |
| CPU core | 2 |
| L2 cache | |
| RAM | 1 GB |
| ROM | 16 - 32 GB |
| GPU | TI OMAP 4460 1,2 GHz dual-core |
| NenaMark2 Benchmark | |
| GPU-GLBenchmark | |
| Baterie mAh | 1750 |
| Foto MPx | 5 |
| Autofocus | yes |
| Video | 480p - 30 frames/s |
| Official Android ICS | Android 4.0 Ice Cream Sandwich |
| CyanogenMod support | |
| Dotek-prstů-max | |
| Display-ppi | |
| Display-retina | |
| Network | GSM&EDGE: 850 / 900 / 1.800 / 1.900 |
| Connectivity | |
| Pozn. |
samsung-i9250-galaxy-nexus image
Editace: 2013-12-09 10:54:07
Počet článků v kategorii: 397
Url:random-number-java
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