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

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

            }
}); 

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

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

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

//kotlin code
editText.
                filters = arrayOf<InputFilter>(object : InputFilter.AllCaps() {
            override fun filter(source: CharSequence, start: Int, end: Int, dest: Spanned, dstart: Int, dend: Int): CharSequence {
                return source.toString().toLowerCase()
            }
        })
        
//xml layout
<?xml version="1.0" encoding="utf-8"?>

hilfritz

//recyclerview list item layout xml with scrollable textview
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    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"
    >            <TextView

hilfritz

private void animateCountdown(final View textView){
        ValueAnimator valueAnimator = ValueAnimator.ofFloat(1f, 0f);
        valueAnimator.setDuration(800);
        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                float alpha = Float.parseFloat(animation.getAnimatedValue().toString());
                textView.setAlpha(alpha);
            }
        });

hilfritz

/**
* Usage:
*        val limit0to24 = EditTextInputFilter(0, 23)
*        val limitChars = EditTextInputFilter(arrayListOf("a","b","c","d","e","f","g","h", "ab", "cd"))
*        input1.setFilters(arrayOf(limit0to24))
*        input2.setFilters(arrayOf(limitChars))
* 
*/

class EditTextInputFilter : InputFilter {

hilfritz

-------------------------------------------------------------------
------------------------build.gradle-------------------------------
-------------------------------------------------------------------
/**
* RxJava2 and RxAndroid2 gradle setup
    implementation 'com.android.support:design:26.1.0'
    compile group: 'io.reactivex.rxjava2', name: 'rxjava', version: '2.1.5'
    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
*/