android--Return of activity jumps (no return value and return value)--No return value

First, no return value

Jump page, and the first page of the EditText input data through the button to the second page edittext display, click on the second page of the

Return button buttons to return to the first page (changing the contents of the second page of EditText cannot be returned to the first page)

--normal way, no way to return a value

1. Set the ID for the first page edittext and button

2. Set button's click-Listen

(1) Get the view instance and find the EditText by EditText ID

(2) Get the content and convert it into textual form

GetText (). ToString ()

(3) Set Intent (intent) to tell the second page, I'm going to jump

Intent in = new Intent (this,excise2.class);

(4) At the same time, the input text content is stored and passed through intent.

In.putextra ("Myet", str);

(5) Start jump

StartActivity (in);

3. Accept the page with EditText receive

(1) Set ID to accept page edittext and button

(2) Create a second page

public class Excise2 extends Activity {
@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.LAYOUT.EXCISE2);

(3) Receiving intent intent get

Intent in = Getintent ();

(4) Take the data that is stored get get

String str = In.getextras (). getString ("Myet");

(5) Display data

Manipulating View Instances

EditText mytv= (EditText) Findviewbyid (R.id.jieshouzhi);

Restores the contents of the input box (set) set

Mytv.settext (str);

4. Set the button's tap to listen

Finish ();

Excise1.xml

<EditTextAndroid:layout_width= "200DP"Android:layout_height= "Wrap_content"android:textsize= "40DP"Android:id= "@+id/ett"        />    <ButtonAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Pass value to third page"android:textsize= "40DP"Android:id= "@+id/chuanzhi"Android:layout_margintop= "100DP"Android:onclick= "Clickcz"        />

Excise1.java

  Public voidClickcz (view view) {//toast static methods are called directly with the class name and do not need to be instantiated//Build A Toast Method instance method call method chainToast.maketext ( This, "This is triggered by mouse click monitoring", Toast.length_long). Show (); //get the information you want to pass//Get View instanceEditText ett =(EditText) Findviewbyid (R.id.ett); //Get contentString str =Ett.gettext (). toString (); //Jump Diversion IntentIntent in =NewIntent ( This, Excise2.class); //Store content via intent//The Extra extension is actually a hashmap, and the limit PutExtra is a bundleIn.putextra ("Myet", str); //start jump no return value of the notationstartactivity (in);

Excise2.xml

<EditTextAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:text= "Excise2 third page"android:textsize= "40DP"Android:id= "@+id/jieshouzhi"        />    <ButtonAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_margintop= "150DP"Android:text= "Back"android:textsize= "40DP"Android:id= "@+id/clickec3"Android:onclick= "CLICKEC3"        />

Excise2.java

 Public classExcise2extendsActivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.LAYOUT.EXCISE2); //Receive Information//1. Acceptance of the intention to pass overIntent in = getintent (); //2. Fetching DataString str = in.Getextras (). getString("Myet"); //3. Where is the display//Manipulating View InstancesEditText mytv=(EditText) Findviewbyid (R.id.jieshouzhi); //restores the contents of the input box (set) SetMytv.settext (str); } Public voidClickec4 (View v) {//Closefinish (); }}

android--Return of activity jumps (no return value and return value)--No return value