Install Node.js on Ubuntu
curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash - sudo apt-get install -y nodejs
curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash - sudo apt-get install -y nodejs
curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash - sudo apt-get install -y nodejs
curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash - sudo apt-get install -y nodejs
@Override public void setUserVisibleHint(boolean visible) { super.setUserVisibleHint(visible); if (visible && isResumed()) { //Only manually call onResume if fragment is already visible //Otherwise allow natural fragment lifecycle to call onResume onResume(); } } @Override public void onResume() { super.onResume(); if (!getUserVisibleHint()) { return; } //INSERT CUSTOM CODE HERE }
References
http://stackoverflow.com/questions/10024739/how-to-determine-when-fragment-becomes-visible-in-viewpager
https://developer.android.com/reference/android/app/Fragment.html#setUserVisibleHint(boolean)
https://developer.android.com/reference/android/app/Fragment.html#setMenuVisibility(boolean)
tracker-preferences
References
https://ask.fedoraproject.org/en/question/9822/how-do-i-disable-tracker-in-gnome/
sudo apt-get install python-software-properties sudo apt-add-repository ppa:libreoffice/ppa sudo apt update
Invalidate the whole view. If the view is visible, onDraw(android.graphics.Canvas) will be called at some point in the future.
This must be called from a UI thread. To call from a non-UI thread, call postInvalidate().
gauge.invalidate();
References
https://developer.android.com/reference/android/view/View.html#invalidate()
http://stackoverflow.com/questions/10647558/when-its-necessary-to-execute-invalidate-on-a-view
@Entity @Table(name = "region", indexes = {@Index(name = "my_index_name", columnList="iso_code", unique = true), @Index(name = "my_index_name2", columnList="name", unique = false)}) public class Region{ @Column(name = "iso_code", nullable = false) private String isoCode; @Column(name = "name", nullable = false) private String name; }
or
@Entity @Table(name = "company__activity", indexes = {@Index(name = "i_company_activity", columnList = "activity_id,company_id")}) public class CompanyActivity{
References
http://stackoverflow.com/questions/3405229/specifying-an-index-non-unique-key-using-jpa
public class Java8Tester { public static void main(String args[]){ System.out.println("Using Java 7: "); // Count empty strings List<String> strings = Arrays.asList("abc", "", "bc", "efg", "abcd","", "jkl"); System.out.println("List: " +strings); long count = getCountEmptyStringUsingJava7(strings); System.out.println("Empty Strings: " + count); count = getCountLength3UsingJava7(strings); System.out.println("Strings of length 3: " + count); //Eliminate empty string List<String> filtered = deleteEmptyStringsUsingJava7(strings); System.out.println("Filtered List: " + filtered); //Eliminate empty string and join using comma. String mergedString = getMergedStringUsingJava7(strings,", "); System.out.println("Merged String: " + mergedString); List<Integer> numbers = Arrays.asList(3, 2, 2, 3, 7, 3, 5); //get list of square of distinct numbers List<Integer> squaresList = getSquares(numbers); System.out.println("Squares List: " + squaresList); List<Integer> integers = Arrays.asList(1,2,13,4,15,6,17,8,19); System.out.println("List: " +integers); System.out.println("Highest number in List : " + getMax(integers)); System.out.println("Lowest number in List : " + getMin(integers)); System.out.println("Sum of all numbers : " + getSum(integers)); System.out.println("Average of all numbers : " + getAverage(integers)); System.out.println("Random Numbers: "); //print ten random numbers Random random = new Random(); for(int i=0; i < 10; i++){ System.out.println(random.nextInt()); } System.out.println("Using Java 8: "); System.out.println("List: " +strings); count = strings.stream().filter(string->string.isEmpty()).count(); System.out.println("Empty Strings: " + count); count = strings.stream().filter(string -> string.length() == 3).count(); System.out.println("Strings of length 3: " + count); filtered = strings.stream().filter(string ->!string.isEmpty()).collect(Collectors.toList()); System.out.println("Filtered List: " + filtered); mergedString = strings.stream().filter(string ->!string.isEmpty()).collect(Collectors.joining(", ")); System.out.println("Merged String: " + mergedString); squaresList = numbers.stream().map( i ->i*i).distinct().collect(Collectors.toList()); System.out.println("Squares List: " + squaresList); System.out.println("List: " +integers); IntSummaryStatistics stats = integers.stream().mapToInt((x) ->x).summaryStatistics(); System.out.println("Highest number in List : " + stats.getMax()); System.out.println("Lowest number in List : " + stats.getMin()); System.out.println("Sum of all numbers : " + stats.getSum()); System.out.println("Average of all numbers : " + stats.getAverage()); System.out.println("Random Numbers: "); random.ints().limit(10).sorted().forEach(System.out::println); //parallel processing count = strings.parallelStream().filter(string -> string.isEmpty()).count(); System.out.println("Empty Strings: " + count); } private static int getCountEmptyStringUsingJava7(List<String> strings){ int count = 0; for(String string: strings){ if(string.isEmpty()){ count++; } } return count; } private static int getCountLength3UsingJava7(List<String> strings){ int count = 0; for(String string: strings){ if(string.length() == 3){ count++; } } return count; } private static List<String> deleteEmptyStringsUsingJava7(List<String> strings){ List<String> filteredList = new ArrayList<String>(); for(String string: strings){ if(!string.isEmpty()){ filteredList.add(string); } } return filteredList; } private static String getMergedStringUsingJava7(List<String> strings, String separator){ StringBuilder stringBuilder = new StringBuilder(); for(String string: strings){ if(!string.isEmpty()){ stringBuilder.append(string); stringBuilder.append(separator); } } String mergedString = stringBuilder.toString(); return mergedString.substring(0, mergedString.length()-2); } private static List<Integer> getSquares(List<Integer> numbers){ List<Integer> squaresList = new ArrayList<Integer>(); for(Integer number: numbers){ Integer square = new Integer(number.intValue() * number.intValue()); if(!squaresList.contains(square)){ squaresList.add(square); } } return squaresList; } private static int getMax(List<Integer> numbers){ int max = numbers.get(0); for(int i=1;i < numbers.size();i++){ Integer number = numbers.get(i); if(number.intValue() > max){ max = number.intValue(); } } return max; } private static int getMin(List<Integer> numbers){ int min = numbers.get(0); for(int i=1;i < numbers.size();i++){ Integer number = numbers.get(i); if(number.intValue() < min){ min = number.intValue(); } } return min; } private static int getSum(List numbers){ int sum = (int)(numbers.get(0)); for(int i=1;i < numbers.size();i++){ sum += (int)numbers.get(i); } return sum; } private static int getAverage(List<Integer> numbers){ return getSum(numbers) / numbers.size(); } }
References
https://www.tutorialspoint.com/java8/java8_streams.htm
http://www.drdobbs.com/jvm/lambdas-and-streams-in-java-8-libraries/240166818
DisplayMetrics displayMetrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(displayMetrics); int height = displayMetrics.heightPixels; int width = displayMetrics.widthPixels;
In a view you need to do something like this:
((Activity) getContext()).getWindowManager() .getDefaultDisplay() .getMetrics(displayMetrics);
Or
public static int getScreenWidth() { return Resources.getSystem().getDisplayMetrics().widthPixels; } public static int getScreenHeight() { return Resources.getSystem().getDisplayMetrics().heightPixels; }
References
http://stackoverflow.com/questions/4743116/get-screen-width-and-height
build.gradle
dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) compile 'com.android.support:appcompat-v7:25.3.1' compile 'com.android.support.constraint:constraint-layout:1.0.2' testCompile 'junit:junit:4.12' compile 'com.android.support:percent:25.3.1' }
activity_main.xml
<?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:layout_width="match_parent" android:layout_height="match_parent" tools:context="ir.mhdr.a081.MainActivity"> <View android:background="@color/colorPrimary" app:layout_heightPercent="50%" app:layout_marginLeftPercent="25%" app:layout_marginTopPercent="25%" app:layout_widthPercent="50%" android:id="@+id/viewColor"> </View> <android.support.percent.PercentFrameLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/viewColor" android:layout_centerInParent="true" android:layout_alignParentBottom="true"> <View android:layout_gravity="center" android:background="@color/colorAccent" app:layout_heightPercent="30%" app:layout_widthPercent="50%" /> </android.support.percent.PercentFrameLayout> </android.support.percent.PercentRelativeLayout>
References
https://github.com/mhdr/AndroidSamples/tree/master/081
https://developer.android.com/reference/android/support/percent/PercentRelativeLayout.html
https://developer.android.com/reference/android/support/percent/PercentFrameLayout.html
https://developer.android.com/topic/libraries/support-library/packages.html
root build.gradle
allprojects { repositories { jcenter() maven { url "https://jitpack.io" } } }
build.gradle
dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) compile 'com.android.support:appcompat-v7:25.3.1' compile 'com.github.Paroca72:sc-widgets:2.1.2' testCompile 'junit:junit:4.12' }
References
https://github.com/mhdr/AndroidSamples/tree/master/080