Round number float - double to int - long Java example
int nf = Math.round(5.789f);
System.out.print(nf); // 6
float f = 28.611f;
int n3 = Math.round(f);
System.out.println(n3); // 29
double d = 1234.56;
long lon = Math.round(d);
System.out.println(lon); // 1235
int diff = 90 - 40;
// float fDeleni = diff / 10; // error code
float fDeleni = (float)diff / 10.f; // ok
int nRound = Math.round(fDeleni);
// Caution:
int n2 = (int) 8.999f;
System.out.println(n2); // 8
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Throws multiple exceptions Java example source code
public void callFc()
throws IndexOutOfBoundsException, ArithmeticException
{
// my code for example:
String[] sArray = {"aa","bb"};
String str = sArray[5]; // IndexOutOfBoundsException
int n = 5 / 0; // ArithmeticException
}
public void someFC (){
try{
callFc();
}
catch(IndexOutOfBoundsException e){
Log.e("TAG", e.toString());
}
catch(ArithmeticException e2){
Log.e2("TAG",e2.toString());
}
}
Android Studio ADB restart mobile device from USB every time if RUN of DEBUG button pressed
Try to close the mobile application on your device completely before starting again from Android Studio.Close every fragment.
The problem occurs when the application has multiple fragments.
Date: 13.07.2020 - 08:23
Use this code for example in some method or function
// public Object getSystemService (String name)
// Return the handle to a system-level service by name.
// The class of the returned object varies by the requested name.
InputMethodManager inputMethodManager = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
//public boolean hideSoftInputFromWindow (IBinder windowToken, int flags)
//EditText myEdit = (EditText)findViewById(R.id.idEditText);
inputMethodManager .hideSoftInputFromWindow(myEdit.getWindowToken(), 0);
Click to Android version combobox - drop down menu and select your version, which just using (have instaled). For example: You updated ADT by SDK manager, but forget to update Android version. You can use lower version from drop down menu, which using your project, or do update of Android by SDK manager.
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];
}
Editace: 2012-07-15 14:42:42
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Url:round-number-float-to-int-java-example
