Implicit Intents

When using implicit intents, we have to check at least one app has to be there in the device to handle the intent. The way to check the sendIntent is,



Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, textMessage);
sendIntent.setType(HTTP.PLAIN_TEXT_TYPE); // "text/plain" MIME type
startActivity(sendIntent);


if (sendIntent.resolveActivity(getPackageManager()) != null) {
   startActivity(sendIntent);
}

Comments

Post a Comment

Popular posts from this blog

Open Gallery and get the selected image in appplication

In this, the screen will have a button to open the android device Gallery and from there if we select any image, that image we can get it in the application.

The code snipped for opening the Gallery is,


Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, 1);


We are opening the gallery as a sub activity of our application, because onActivityResult() will get called after selecting the image from gallery. So in onACtivityResult(), we will get the Uri of the selected image and from Mediastore contentprovider, we can get the selected image as bitmap. After that, for showing it in the application, just setting the image in a ImageView.

The complete code is,


public class GalWalActivity extends Activity {

private ImageView selectedImage;
private Bitmap currentImage;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentVie…
Read more

AlarmManager and Notification in Android

Image
In this, I am going to explain AlarmManager and Notification. For Notifying Users in Android, we can use mainly 3 methods as,

Dialog
Toast
Notification

The full picture of this can seen here

AlarmManager, we can use in two ways, as

-To start some action, if a particular event happens,
-To do some particular actions in every time interval.

As specified in Android developer site, we will use AlarmManager, when we need to do some actions, even if our application is not running. For normal timing operations use handlers.

For using AlaramManager, first we need to declare the BroadcastReceiver in Manifest file as,

<receiver android:name=".TimeAlarm" />
We need to get the object of the AlarmManager using getSystemService(), then define an intent with parameters as the current context and the BoradcastReceiver class(TimeAlarm). Then define a pendingIntent, we will get the object of it using PendingIntent.getBroadcast(). Now we can call the set() of AlarmManager for doing some ac…
Read more

Dismiss or Cancel dialog by swipe gesture

Dismiss dialog by all four swipe gestures as swipe right to left, left to right, top to bottom, bottom to top First, create a inner class in custom dialogFragment class for the the SimpleGestureListener as, class MyGestureDetector extends GestureDetector.SimpleOnGestureListener { private static final int SWIPE_MIN_DISTANCE = 120; private static final int SWIPE_THRESHOLD_VELOCITY = 200; public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { // swipe right to left dismiss(); } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { // swipe left to right dismiss(); } else if (e1.ge…
Read more