Snippets

Small pieces of code that can be copy/paste-ed on your project

Snippets, Solutions

Android HttpResponse content(body) to String

Usually I use the following code to convert a Http response content to String:   BufferedReader in = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); StringBuilder responseBuilder = new StringBuilder(); String line = “”; while ((line = in.readLine()) != null) { responseBuilder.append(line); } in.close(); Log.e(“WS RESPONSE”, responseBuilder.toString()); It is not a bad idea but I found over the internet that […]

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Snippets, Solutions

Android ExpandableListView Scroll to Expanded Group Position

Once I had this problem: I had an ExapandableListView with groups and children. When I wanted to expand a group the list was scrolling to the end every time. After a little search I’ve figured it out what the problem was. In my xml file where my ExpandableListView was created, I had this attribute: android:transcriptMode=”alwaysScroll”

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Snippets

Set the application icon

To set the application icon in Android you have to open the project’s Manifest.xml file and add the following attribute to the application tag: <application android:icon=”drawable resource”> Before you do that make sure you add the icon image in one of your drawable directories.. If you called your icon: app_icon.png then the application tag should look

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Snippets, Solutions

Add image to email intent in Android

How to add image to an email intent in Android: // build a email sending intent Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); emailIntent.setType(“image/png”); // set the email subject emailIntent.putExtra(Intent.EXTRA_SUBJECT, “email subject”); // set the email image path for the attachment emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(“file://” + mEmailImagePath)); // set the body of the email emailIntent.putExtra(Intent.EXTRA_TEXT, “some text message”);

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Snippets, Tutorial

Android Vibrate on Click

If you want to make the phone to vibrate when you click on a button from your application: 1. You have to declare in your AndroidManifest.xml the permission: <uses-permission android:name=”android.permission.VIBRATE”/> 2. Now go to the class you want to put the vibration and in onCreate put this code: final Vibrator vibe = (Vibrator) yourActivity.this.getSystemService(Context.VIBRATOR_SERVICE); //replace

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Snippets, Tutorial

Android EditText text changes Listener

If you want “listen” to the text changes from an EditText you have to use the TextWatcher. Bellow I will show you an example of TextWatcher: //first, we create an EditText EditText answer = new EditText(this); //second, we create the TextWatcher TextWatcher textWatcher = new TextWatcher() { @Override public void beforeTextChanged(CharSequence charSequence, int i, int

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Snippets, Tutorial

Android How To Make an AlertDialog

To make an AlertDialog you have to write this code: AlertDialog.Builder alertDelete = new AlertDialog.Builder(ListsActivity.this); //HERE YOU WILL WRITE THE MESSAGE YOU WANT alertDelete.setMessage(R.string.delete_confirm); //HERE IS THE POSITIVE BUTTON. YOU HAVE TO SET THE BUTTON NAME AND A CLICK LISTENER alertDelete.setPositiveButton(getString(R.string.yes),new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { //YOUR ACTION } });

Snippets

How to make a background button selector in XML?

Step 1: Create an XML in the drawable folder and name it selected_item.xml (or any another name you want but to be suggestive). The code in this xml will be: <shape android=”http://schemas.android.com/apk/res/android” shape=”rectangle”> <solid color=”#80000000″></solid> </shape> The color=”#80000000″ is transparent black. Step 2: Create an XML again, in the drawable folder an name it not_selected.xml. The code

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