Tag Archives: example

17,340 views

Create About Dialog Android Example

Wiktionary – SDK samples Android protected void showAbout() { // Inflate the about message contents View messageView = getLayoutInflater().inflate(R.layout.about, null, false);   // When linking text, force to always use default color. This works // around a pressed color state … Continue reading

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4,591 views

Include xml into another xml Android Example

How include layout defined in other xml file into another xml file example: res/layout/my_layout.xml into main.xml <include layout="@layout/my_layout" android:id="@+id/idMyLayout" />

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13,820 views

Cross Button in EditText Android

Cross Button in EditText Android for deleting clearing text in EditText Example source code: Example allow delete text in EditText by cross button, or do Button click performance. main.xml type your package name and class Put into drawable folder cross … Continue reading

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36,123 views

SparseArray instead HashMap Android example

Old code with HashMap Map<Integer, Bitmap> _bitmapCache = new HashMap<Integer, Bitmap>(); private void fillBitmapCache() { _bitmapCache.put(R.drawable.icon, BitmapFactory.decodeResource(getResources(), R.drawable.icon)); _bitmapCache.put(R.drawable.abstrakt, BitmapFactory.decodeResource(getResources(), R.drawable.abstrakt)); _bitmapCache.put(R.drawable.wallpaper, BitmapFactory.decodeResource(getResources(), R.drawable.wallpaper)); _bitmapCache.put(R.drawable.scissors, BitmapFactory.decodeResource(getResources(), }   Bitmap bm = _bitmapCache.get(R.drawable.icon); Lint warning: Use new SparseArray(…) instead for better … Continue reading

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3,855 views

How to save the state of Activity – Android

onSaveInstanceState, onRestoreInstanceState , save preferences int mCurrentPhotoIndex = 0; @Override protected void onSaveInstanceState(Bundle outState) { outState.putInt("photo_index", mCurrentPhotoIndex); super.onSaveInstanceState(outState); }   @Override protected void onRestoreInstanceState(Bundle savedInstanceState) { mCurrentPhotoIndex = savedInstanceState.getInt("photo_index"); super.onRestoreInstanceState(savedInstanceState); }   // or save preferences for new start of … Continue reading

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2,706 views

Throwing multiple exceptions Java

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 }   … Continue reading

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4,513 views

Java pass variable as reference

Integer, Float, String, List passed as reference in JAVA example source code: // List passed as reference JAVA List<Integer>list = new ArrayList<Integer>();   public void fc (List<Integer>listRef){ listRef.add(7); listRef.add(5); } fc(list); // 7, 5     // String passed as … Continue reading

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13,930 views

How to programmatically set the button style – Android

How set rounded corners and own styles ActivityMy.java Button btn.setBackgroundResource(R.drawable.back_button_answer); \res\drawable\back_button_answer.xml <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" > <corners android:radius="10dip" /> <!– background –>   <gradient android:startColor="#D6D7D6" android:centerColor="#E2E2E2" android:centerY="0.75" android:endColor="#D6D7D6" android:angle="270" />   <stroke android:width="2dip" android:color="#fff"/> </shape>

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3,063 views

LinkedMap HashMap Java

Map<Float,String> linkedHashMap = new LinkedHashMap<Float, String>();   linkedHashMap.put(14.f, "text"); linkedHashMap.put(13.f, "text"); linkedHashMap.put(10.f, "text"); linkedHashMap.put(11.f, "text"); linkedHashMap.put(2.f, "text"); linkedHashMap.put(3.f, "text"); linkedHashMap.put(1.f, "text"); linkedHashMap.put(7.f, "text"); linkedHashMap.put(23.f, "text");   for (Entry<Float,String> entry : linkedHashMap.entrySet()) { System.out.println(entry.getKey()); } 14.0 13.0 10.0 11.0 2.0 3.0 … Continue reading

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10,485 views

java.lang.NullPointerException: println needs a message

Problemi is in e.getMessage() what can return null and Log.e (String tag, String msg) will throws an new exception !!!! Problem and solution: try { int [] i = {1}; int z = i[5]; } catch (ArrayIndexOutOfBoundsException e) { String … Continue reading

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