StartActivityForResult function returned by Android Activity

 

Click the first button, and then enter text on the second page. The text entered in the second Activity appears in the first EditText ,,

The code can understand the startActivityForResult function at a glance.

First Activity

 

Import android. app. Activity;

Import android. content. Intent;

Import android. OS. Bundle;

Import android. util. Log;

Import android. view. View;

Import android. view. View. OnClickListener;

Import android. widget. Button;

Import android. widget. EditText;

 

Public class DataBackActivity extends Activity {

/** Called when the activity is first created .*/

Private static final int REQUESTCODE = 1;

Private Button button;

Private EditText editText;

@ Override

Public void onCreate (Bundle savedInstanceState ){

Super. onCreate (savedInstanceState );

SetContentView (R. layout. main );

Button = (Button) findViewById (R. id. button1 );

EditText = (EditText) findViewById (R. id. editText1 );

Button. setOnClickListener (new MyButtonLIstener ());

}

Class MyButtonLIstener implements OnClickListener {

 

@ Override

Public void onClick (View v ){

// TODO Auto-generated method stub

Intent intent = new Intent ();

Intent. setClass (DataBackActivity. this, To. class );

StartActivityForResult (intent, REQUESTCODE );

}

} Www.2cto.com

/* (Non-Javadoc)

* @ See android. app. Activity # onActivityResult (int, int, android. content. Intent)

*/

@ Override

Protected void onActivityResult (int requestCode, int resultCode, Intent data ){

// TODO Auto-generated method stub

If (requestCode = REQUESTCODE ){

Switch (resultCode ){

Case RESULT_ OK:

String dateString = data. getExtras (). getString ("Da ");

Log. I ("----------->", dateString );

EditText. setText (dateString );

Break;

 

Default:

Break;

}

}

Super. onActivityResult (requestCode, resultCode, data );

}

}

 

Second Activity

 

Package rw. data;

 

Import android. app. Activity;

Import android. content. Intent;

Import android. OS. Bundle;

Import android. view. View;

Import android. view. View. OnClickListener;

Import android. widget. Button;

Import android. widget. EditText;

 

Public class To extends Activity {

/** Called when the activity is first created .*/

Private Button button;

Private EditText editText;

@ Override

Public void onCreate (Bundle savedInstanceState ){

Super. onCreate (savedInstanceState );

SetContentView (R. layout. );

Button = (Button) findViewById (R. id. button1 );

EditText = (EditText) findViewById (R. id. editText1 );

Button. setOnClickListener (new MyButtonLIstener ());

}

Class MyButtonLIstener implements OnClickListener {

 

@ Override

Public void onClick (View v ){

// TODO Auto-generated method stub

Intent intent = new Intent ();

Intent. putExtra ("Da", editText. getText (). toString ());

To. this. setResult (RESULT_ OK, intent );

To. this. finish ();

}

}

}

 

 

 

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