According to deliver Android's development and data backhaul way steps

The step of communicating data using the bundle:

Mainactivity:

1. Create a new Intent, and initialization
2. Create a Bundle
3. PutCharSequence call function key-value pair is inserted (according to the type of Value may be)
4. Use intent.putExtras (bundle) transmitting bundle
5. startActivity (intent) to boot activity of

Main2activity：

1. 获取Intent：Intent intent =getIntent();
2. 获取bundle：Bundle bundle =intent.getExtras();
3. Use bundle.getString (key) Get value (depending on the type of Value)

Call another activity and return the result of steps:

Mainactivity:

1. Create a new Intent, and initialization
2. Using the startActivityForResult (intent, code) ; function and populate objects and intent parameters requestcode (code custom values, e.g. ox11)

optionActivity：

1. Initialization intent and bundle, and to return data into a bundle
2. intent.putExtras(bundle);
3. Use setResult ( code , Intent); returns the content provided
4. Finish（）；