Intent intended for data transfer between activity

http://blog.sina.com.cn/s/blog_83940dfb0100veas.html

For data transfer between activity

in the start activity, the data is sent

protected void OnCreate (Bundle saveinstancestate) {

Super.oncreate (saveinstancestate);

Setcontentview (r.layout.thisactivity);

Intent Intent = new Intent ();

Set the start activity and target activity to indicate that the data is transferred from this activity to the next activity

Intent.setclass (Thisactivity.this,targetactivity.class);

Binding Data

Intent.putextra ("username", username);//You can also bind an array

Intent.putextra ("Userpass", Userpass);

Open target Activity

StartActivity (Intent);

}

in the target activity, receive the data:

protected void OnCreate (Bundle saveinstancestate) {

Super.oncreate (saveinstancestate);

Setcontentview (r.layout.targetactivity);

Get Intent

Intent Intent = Getintent ();

Reading data

String name = Intent.getstringextra ("username");

String pass = Intent.getstringextra ("Userpass");

}

Bundles (bundles) can also be applied

in the start activity, send the data:

protected void OnCreate (Bundle saveinstancestate) {

Super.oncreate (saveinstancestate);

Setcontentview (r.layout.thisactivity);

Intent Intent = new Intent ();

Set the start activity and target activity to indicate that the data is transferred from this activity to the next activity

Intent.setclass (Thisactivity.this,targetactivity.class);

Bind multiple data at once

Bundle bundle = new bundle ();

Bundle.putstring ("username", username);

Bundle.putstring ("Userpass", Userpass);

Intent.putextras (bundle);

Open target Activity

StartActivity (Intent);

}

in the target activity, receive the data:

protected void OnCreate (Bundle saveinstancestate) {

Super.oncreate (saveinstancestate);

Setcontentview (r.layout.targetactivity);

Get Intent

Intent Intent = Getintent ();

Reading data

Bundle bundle = Intent.getextras ();

String name = bundle.getstring ("username");

String pass = bundle.getstring ("Userpass");

}

When you need to return data from the target activity to the original activity, you can use the above method to define a new Intent to pass the data, or you can use Startactivityforresult (Intent Intent, int Requestcode); method.

In the start activity, send the data:

protected void OnCreate (Bundle saveinstancestate) {

Super.oncreate (saveinstancestate);

Setcontentview (r.layout.thisactivity);

Intent Intent = new Intent ();

Set the start activity and target activity to indicate that the data is transferred from this activity to the next activity

Intent.setclass (Thisactivity.this,targetactivity.class);

Binding Data

Intent.putextra ("username", username);//You can also bind an array

Intent.putextra ("Userpass", Userpass);

Open target Activity

Startactivityforresult (intent,1);

}

//need to override Onactivityresult method

protected void Onactivityresult (int requestcode, int resultcode, Intent Intent) {

Super.onactivityresult (requestcode,resultcode,intent);

Determine if the result code is the same as the result code of the callback

if (ResultCode = = 1) {

Get backhaul data

String name = Intent.getstringextra ("name");

String pass = Intent.getstringextra ("Pass");

Working with Data

......

}

in the target activity, receive the data:

protected void OnCreate (Bundle saveinstancestate) {

Super.oncreate (saveinstancestate);

Setcontentview (r.layout.targetactivity);

Get Intent

Intent Intent = Getintent ();

Reading data

String name = Intent.getstringextra ("username");

String pass = Intent.getstringextra ("Userpass");

Get new data from EditText to name and pass

Name = Edittext1.gettext (). toString ();

pass = Edittext2.gettext (). ToString ()

Data changes, you need to pass the changed value back to the original activity

Intent.putextra ("name", name);

Intent.putextra ("Pass", pass);

Setresult (int resultcode,intent Intent) method

Setresult (1,intent);

Destroying this activity will automatically return to the previous activity when the activity is destroyed.

Finish ();

}

Intent intended for data transfer between activity