android

[Solved] Eclipse:error missing (,} [closed]

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The error messages are very descriptive. Check file MainActivity.java, line 65 and fix it. Similar for line 86. Anyway, these are the errors: Syntax error on token “)”, { expected MainActivity.java /CalculatorVamalV2/src/com/elitiv/calculatorvamalv2 line 65 Java Problem You missed a close brace } in the inner class definition: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); … Read more

[Solved] Which one is better between pure data class and a normal class with business logic in Kotlin?

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Semantically speaking set() is not the best naming for what you’re actually doing. Since Kotlin supports extension functions, you can have both of the approaches at once. data class BluetoothDef( val isChecked: Boolean = true, val status: Boolean = false ) : DeviceDef fun BluetoothDef.with(context: Context) { BluetoothHelper(context).setBluetooth(this) } 0 solved Which one is better … Read more

[Solved] Sort a class array by a string attribute in Java

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For Java 8 use a lambda expression and the Arrays sort function: Users[] someUsers = {user1, user2, user3}; Arrays.sort(someUsers, (a,b) -> a.firstName.compareTo(b.firstName)); For previous versions use a Collection Comparator: Users[] someUsers = {user1, user2, user3}; List<Users> userList = new ArrayList<Users>(Arrays.asList(someUsers)); Comparator<Users> comparator = new Comparator<Users>() { @Override public int compare(Users left, Users right) { return … Read more

[Solved] How to replace several characters on a single string to desired characters (java)?

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public class TranslateChar { /** @param args */ public static void main(final String[] args) { final Map<Character, Character> mapCharCod = new HashMap<>(36); final Map<Character, Character> mapCharDecod = new HashMap<>(36); mapCharCod.put(‘A’, ‘Z’); mapCharCod.put(‘B’, ‘X’); mapCharCod.put(‘C’, ‘Y’); mapCharDecod.put(‘Z’, ‘A’); mapCharDecod.put(‘X’, ‘B’); mapCharDecod.put(‘Y’, ‘C’); final String toCod = “CAB”; StringBuilder sb = new StringBuilder(“{“); for (final char c … Read more

[Solved] android: does anyone see a – componentinfo java.lang.nullpointerexception? [closed]

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You are getting your null pointer exception on 21 and below because getHeight and getWidth were added then. Try this ; if ( Integer.valueOf(android.os.Build.VERSION.SDK_INT) < 13 ) { Display display = getWindowManager().getDefaultDisplay(); int width = display.getWidth(); int height = display.getHeight(); } else { Display display = getWindowManager().getDefaultDisplay(); Point size = new Point(); display.getSize(size); int width … Read more

[Solved] how to design form like google calender event in android? [closed]

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You can achieve that by using PercentageRelativeLayout. Try this XML code: <?xml version=”1.0″ encoding=”utf-8″?> <android.support.percent.PercentRelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:app=”http://schemas.android.com/apk/res-auto” xmlns:tools=”http://schemas.android.com/tools” android:orientation=”vertical” android:layout_width=”match_parent” android:layout_height=”match_parent” android:padding=”20dp” android:layout_margin=”10dp”> <android.support.percent.PercentRelativeLayout android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:id=”@+id/from_layout” android:layout_margin=”5dp”> <TextView android:text=”FROM” android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:id=”@+id/textView8″ android:textSize=”24sp” style=”@android:style/Widget.DeviceDefault.Light.TextView” /> <Spinner app:layout_widthPercent=”60%” android:layout_height=”wrap_content” android:id=”@+id/spinner2″ android:layout_below=”@+id/textView8″ android:spinnerMode=”dialog” style=”@style/Platform.Widget.AppCompat.Spinner” /> <Spinner app:layout_widthPercent=”40%” android:layout_height=”wrap_content” android:id=”@+id/spinner4″ android:layout_toRightOf=”@+id/spinner2″ android:gravity=”start” android:layout_below=”@+id/textView8″ android:spinnerMode=”dialog” style=”@style/Platform.Widget.AppCompat.Spinner” /> </android.support.percent.PercentRelativeLayout> … Read more

[Solved] Detect a color of a sprite

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Get all the sprite(10) in a arrayMap. And get the color value or you can say current sprite, Using this key get map value when you are setting the color or sprite. ArrayMap<Sprite, String> arrayMap=new ArrayMap<Sprite, String>(); arrayMap.put(sprite1, “Red”); arrayMap.put(sprite2, “Yellow”); arrayMap.put(sprite3, “Black”); arrayMap.put(sprite4, “Pink”); arrayMap.put(sprite5, “Color1”); arrayMap.put(sprite6, “Color2”); arrayMap.put(sprite7, “Color3”); arrayMap.put(sprite8, “Color4”); arrayMap.put(sprite9, “Color5”); … Read more

[Solved] how to split a string which contains of ( \n : , .)

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You can use Pattern for regex split String fields = “name[Employee Name], employeeno[Employee No], dob[Date of Birth], joindate[Date of Joining]”; Pattern pattern = Pattern.compile(“\\[.+\\]+?,?\\s*” ); String[] split = pattern.split(fields); References: How to split this string using Java Regular Expressions 0 solved how to split a string which contains of ( \n : , .)

[Solved] android studio : findViewById return NULL Pointer [duplicate]

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<RelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:tools=”http://schemas.android.com/tools” android:layout_width=”match_parent” android:layout_height=”match_parent” android:paddingBottom=”@dimen/activity_vertical_margin” android:paddingLeft=”@dimen/activity_horizontal_margin” android:paddingRight=”@dimen/activity_horizontal_margin” android:paddingTop=”@dimen/activity_vertical_margin” tools:context=”bd2c.bd2c_appdemo.MainActivity”> <TextView android:id=”@+id/principal” android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:text=”@string/app_text” /> </RelativeLayout> This is your fixed layout select all copy that and go to your layout select all and paste this. Bingo 🙂 solved android studio : findViewById return NULL Pointer [duplicate]