Inside: Adapters, Custom Adapters, Intents, Activities, Permissions.

1. Cloud
InteractionDesign
Android

2. ListAdapter / StringAdapter

3. ListAdapter / StringAdapter
Mapping Model to UI (MVVM-like-ish)

8. Custom Lists

9. Custom Lists

10. Custom Lists

11. Custom Lists

17. Activities
Starting Another Activity

18. Intent
an object that provides runtime binding between
separate components (such as two activities)

19. Intent
carry a collection of various data types as
key-value pairs called extras through putExtra()

20. It’s a good practice..
to define keys for intent extras using your app's package
name as a prefix. This ensures they are unique, in case your
app interacts with other apps.

21. AndroidManifest.xml
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-­‐filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-­‐filter>
</activity>
<activity
android:name=".DisplayMessageActivity"
android:label="@string/title_activity_display_message" >
<meta-­‐data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.intetsample.MainActivity" />
</activity>
</application>

22. Starting Another Activity
• In the first activity:
public void onClickLaunchSecondActivity(View view) {
Intent intent = new Intent(this, SecondActivity.class);
EditText editText = (EditText) findViewById(R.id.editTxtMsg);
String message = editText.getText().toString();
intent.putExtra("MainActivityMsg", message);
startActivity(intent);
}
• In the second activity:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second_activity);
((TextView)findViewById(R.id.txtviewMsgList)).
setText(this.getIntent().getExtras().getString("MainActivityMsg"));
}

23. Starting Another Activity
• In the first activity:
public void onClickLaunchSecondActivity(View view) {
Intent intent = new Intent(this, SecondActivity.class);
EditText editText = (EditText) findViewById(R.id.editTxtMsg);
String message = editText.getText().toString();
intent.putExtra("MainActivityMsg", message);
startActivity(intent);
}
• In the second activity:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second_activity);
((TextView)findViewById(R.id.txtviewMsgList)).
setText(this.getIntent().getExtras().getString("MainActivityMsg"));
}

24. What we did is calling
Explicit Intents
Intent(this, SecondActivity.class)

25. So what is
Implicit Intents?

26. Implicit Intents
public class ImplicitIntentActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_implicit_intent);
final ImageView image = (ImageView)findViewById(R.id.imageView);
image.setImageURI((Uri)getIntent().getExtras().get(Intent.EXTRA_STREAM));
}
}

32. Activity
Life Cycle

33. Activity Life Cycle
http://developer.android.com/reference/android/app/Activity.html

35. onPasue()
@Override
public void onPause() {
// Always call the superclass method first
super.onPause();
// Release the Camera because
// we don't need it when paused
// and other activities might need to use it.
if (mCamera != null) {
mCamera.release()
mCamera = null;
}
}

36. onResume()
@Override
public void onResume() {
// Always call the superclass method first
super.onResume();
// Get the Camera instance as the activity
// achieves full user focus
if (mCamera == null) {
// Local method to handle camera init
initializeCamera();
}
}

37. Recreating activity
onSaveInstanceState

38. Permissions

39. Permissions

40. Permissions

41. Permissions