hilfritz

public class Logger {

    public static final void logd(String tag, String message){
        Logger.d(tag, message);
    }
    public static void d(String TAG, String message) {
        int maxLogSize = 1000;
        for(int i = 0; i <= message.length() / maxLogSize; i++) {
            int start = i * maxLogSize;
            int end = (i+1) * maxLogSize;

hilfritz

https://github.com/MindorksOpenSource/android-interview-questions#data-structures-and-algorithms
https://www.toptal.com/android/interview-questions
What is a ContentProvider and what is it typically used for?
-A ContentProvider manages access to a structured set of data. It encapsulates the data and provide mechanisms for defining data security. ContentProvider is the standard interface that connects data in one process with code running in another process.

Under what condition could the code sample below crash your application? How would you modify the code to avoid this potential problem? Explain your answer.

    Intent sendIntent = new Intent();
    sendIntent.setAction(Intent.ACTION_SEND);

hilfritz

 /**
     * from here: https://stackoverflow.com/questions/22186778/using-math-round-to-round-to-one-decimal-place
     * @param value double value with decimal places 123.123456789
     * @param precision 1 number of decimal places desired ex. 1 (result => 123.1)
     * @return
     */
    public static double roundToDecimalPlaces(double value, int precision) {
        int scale = (int) Math.pow(10, precision);
        return (double) Math.round(value * scale) / scale;
    }

hilfritz

AsyncTask.execute(new Runnable() {
            @Override
            public void run() {
              //ADD YOUR CODE TO EXECUTE IN BACKGROUND THREAD HERE

            }
}); 

hilfritz

 public static void openPDFFiile(Context context,File file){
        //OPEN THE PDF
        String mimeTypeStr = "application/pdf";
        Intent intent2 = new Intent(Intent.ACTION_VIEW);
        //intent2.setDataAndType(uri, mimeTypeStr);

        //Uri apkURI = FileProvider.getUriForFile(
        //        context,
        //        context.getApplicationContext()
        //                .getPackageName() + ".provider", file);

hilfritz

//https://stackoverflow.com/questions/7189948/full-screen-dialogfragment-in-android
override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        //val dialog = super.onCreateDialog(savedInstanceState)

        // request a window without the title
        //dialog.window!!.requestFeature(Window.FEATURE_NO_TITLE)

        // the content
        val root = RelativeLayout(activity)
        root.layoutParams = ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)

hilfritz

 override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setStyle(DialogFragment.STYLE_NORMAL, android.R.style.Theme_Black_NoTitleBar_Fullscreen)
    }

hilfritz

1. Find the longest String in an array of Strings


     //ANSWER:
 	public String getLongestStringInArray(String[] array){

        int index = 0;
        int elementLength = array[0].length();
        int arraySize = array.length;
        for(int i=1; i< arraySize; i++) {

hilfritz

//https://stackoverflow.com/questions/25457737/how-to-create-an-observable-from-onclick-event-android

Observable<View> clickEventObservable = Observable.create(new Observable.OnSubscribe<View>() {
        @Override
        public void call(final Subscriber<? super View> subscriber) {
            viewIWantToMonitorForClickEvents.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (subscriber.isUnsubscribed()) return;
                    subscriber.onNext(v);

hilfritz

//issue happens one pre lolipop devices
//https://stackoverflow.com/questions/27083091/recyclerview-inside-scrollview-is-not-working

//must use NestedScrollView

fix: 
mRecyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
        int action = e.getAction();