Codeandroidmeetup3 Presentation 090727194330 Phpapp01

8/13/2019 Codeandroidmeetup3 Presentation 090727194330 Phpapp01

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Intents &

Intent Filterscodeandroid.org


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Intents & Intents Filter

Intents : request for an action to beperformed (usually on a set of data)

Intent Filters : register Activities, Services,and Broadcast Receivers (as being capable

of performing an action on a set of data) Broadcast Receivers : listens to intents


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Intents

Support interaction between any

application components available on anAndroid device

start a new Activity broadcast messages (broadcast intents)


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IntentsStarting a new Activity

Intent intent = new Intent (......................);startActivity(intent);


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Intent intent = new Intent (Intent.ACTION_DIAL, Uri.parse(tel:93675359));

startActivity(intent);

Dial a number

Intent intent = new Intent (Intent.ACTION_VIEW, Uri.parse(http://codeandroid.org));


Launch a website
http://codeandroid.org/http://codeandroid.org/


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Intent intent = new Intent (this, HelloWorld.class);


Launch an Activity

Intent intent = new Intent (this, HelloWorld.class);

intent.putExtra(title,Hello codeandroid);startActivity(intent);

Launch an Activity


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Intent Filters

AndroidManifest.xml

Intent intent = new Intent (this, HelloWorld.class);startActivity(intent);

Launch Hello World


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Intent Filters

Required for Intent resolution tomatch Intents to Activities, Services, orBroadcastReceivers

Most Intent Filters are declared in

AndroidManifest.xml of an application


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Intent Filters

AndroidManifest.xml

Intent intent = new Intent (org.codeandroid.intentstest.HelloWorld);startActivity(intent);

Launch Hello World


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Intent Filters

AndroidManifest.xml

Intent intent = new Intent (Intent.ACTION_VIEW, Uri.parse(http://androidium.org));startActivity(intent);

Launch Hello World
http://codeandroid.org/http://codeandroid.org/http://codeandroid.org/http://www.androidium.org/http://www.androidium.org/


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Intent Filters

AndroidManifest.xml
http://www.androidium.org/http://www.androidium.org/http://www.androidium.org/


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Intent Filters

AndroidManifest.xml

Intent intent = new Intent (Intent.ACTION_VIEW, Uri.parse(codeandroid://));startActivity(intent);

Launch Hello World


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IntentsLaunch the Android Market

Uri marketUri = Uri.parse(http://market.android.com/search?q=pname:com.buuuk.buUuk)

Intent intent = new Intent (Intent.ACTION_VIEW, marketUri);startActivity(intent);

Uri marketUri = Uri.parse(market://search?q=pname:com.buuuk.buUuk)Intent intent = new Intent (Intent.ACTION_VIEW, marketUri);startActivity(intent);
http://market.android.com/search?q=%5Bhttp://market.android.com/search?q=%5Bhttp://market.android.com/search?q=%5Bhttp://market.android.com/search?q=%5B


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IntentsBroadcast Intents

broadcast messages betweencomponents with the sendBroadcastmethod

makes an application more open, bybroadcasting to current and otherapplications


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IntentsBroadcast Intents

Intent intent = newIntent(org.codeandroid.intentstest.TestBroadcastReceiver);sendBroadcast(intent);


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Broadcast Receivers

listen to Broadcast Intents must be registered (either in code or

within the app manifest

use Intent Filter to specify whichIntents it is listening for


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Broadcast Receiversregistered inside code

IntentFilter filter = new IntentFilter(org.codeandroid.intentstest.TestBroadcastReceiver);TestBroadcastReceiver receiver = new TestBroadcastReceiver();

registerReceiver(receiver, filter);

public class TestBroadcastReceiverextends Broadcast Receiver{

@Overridepublic void onReceive(Context context, Intent intent){

(.................... do something here................)

}

}


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Broadcast Receiversregister in app manifest

public class CameraPressed extends Broadcast Receiver{@Overridepublic void onReceive(Context context, Intent intent){

(.................... do something here................)

}

}

Codeandroidmeetup3 Presentation 090727194330 Phpapp01

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