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This article introduces the relevant knowledge of "how to transfer values between Activity in Android". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Method 1: 1 passes a value to 2

Activity1:

Java code

Final Intent intent = new Intent (mCtx,Activity1.class); / / pass the current user to intent.putExtra ("user", mUser); startActivity (intent)

Inside mUser is an object, which is actually a Map, and "user" is the key of the object mUser.

Activity2:

Java code

MUser = (User) getIntent () .getSerializableExtra ("user")

MUser is the object, getIntent () is the method of Activity, it is worth noting that the resulting mUser is not a reference, but new an object and assign a value, if this thing is to be passed back, startActivity (intent); it is useless.

So use method 2:

Activity1:

Java code

Intent.setClass (mCtx, Activity2.class); intent.putExtra ("user", mUser); startActivityForResult (intent, 1)

And in Activity1

Java code

Protected void onActivityResult (int requestCode, int resultCode, Intent data) {super.onActivityResult (requestCode, resultCode, data); if (resultCode==1 | | data.getSerializableExtra ("putUserbyhua")! = null) mUser= (User) getIntent (). GetSerializableExtra ("putUserbyhua");}

Activity2:

Get the passed value

Java code

MIntent = getIntent () mUser= (User) mIntent.getSerializableExtra (UserConst.USER_DATA)

Jump to 1 when you press the return key

Java code

@ Override public boolean onKeyDown (int keyCode, KeyEvent event) {if (keyCode = = KeyEvent.KEYCODE_BACK) {final Intent intent=new Intent (); intent.setClass (mCtx, Activity2.class); intent.putExtra ("putUserbyhua", mUser); this.setResult (1); this.finish ();} return super.onKeyDown (keyCode, event);} "how to transfer values between Activity in Android". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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