PendingIntent in Android

2012-02-01T00:47:00.000-08:00

Hi, Sweet Day

What Is PendingIntent ?

A PendingIntent has defined Activity, Broadcast or Service within it, and those can be sent to other applications to use it.

Why PendingIntent ?

I can define my Intent (Activity, BroadcastReceiver or Service) and can send to other application to use it. Why PendingIntent is required ?

If I create Intent,
Intent bIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

and sending "bIntent" to other application , which is not having permission (android.permission.BLUETOOTH_ADMIN).

So, When I do,
startActivity(bIntent);

It will never launch bluetooth enabling Activity.

If we use PendingIntent, the application (which use PendingIntent) no need to have permission. But the application which creates PendingIntent must have required permission for Intents.

PendingIntent can be created using it's static methods getActivity(), getBroadcast() and getService().

Let's see sample for PendingIntent,

public class IParcel implements Parcelable

{

PendingIntent pIntent = null;

public IParcel(PendingIntent pi)

{

pIntent = pi;

}

public IParcel(Parcel in)

{

pIntent = (PendingIntent)in.readValue(null);

}

public static Parcelable.Creator<IParcel> CREATOR = new Parcelable.Creator<IParcel>(){

@Override

public IParcel createFromParcel(Parcel source) {

// TODO Auto-generated method stub

return new IParcel(source);

}

@Override

public IParcel[] newArray(int size) {

// TODO Auto-generated method stub

return null;

}

};

@Override

public int describeContents() {

// TODO Auto-generated method stub

return 0;

}

@Override

public void writeToParcel(Parcel dest, int flags) {

// TODO Auto-generated method stub

dest.writeValue(pIntent);

}

public class FirstApp extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

Intent myIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

PendingIntent pIntent = PendingIntent.getActivity(this, 0, myIntent,PendingIntent.FLAG_ONE_SHOT);//FLAG_ONE_SHOT - only once pIntent can use the myIntent

IParcel ip = new IParcel(pIntent);

Intent sndApp = new Intent();

sndApp.setComponent(new ComponentName("com.myapp", "com.myapp.SecondApp"));

sndApp.putExtra("obj",ip);

startActivity(sndApp);

}

public class SecondApp extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

IParcel pc = getIntent().getExtras().getParcelable("obj");

if(pc != null){

pc.pIntent.send(); // this will launch the bluetooth enabling activity

}

This is my first blog.I hope this is not bad one.
Suggestions are welcome.

Thanks.

Android - Pending Intent

PendingIntent in Android