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androidandroid-intentbundle

Simple example for Intent and Bundle


I'm new to android with almost no knowledge about Java and XML. I'm learning it through pdfs that i'm getting on net. I have learnt about Toast, a bit about Intents but me not able to understand anything about Bundles. I have understood that they are used to pass data from one activity to another but I'm not able to implement this.

please give a simple example to implement the same.

as for example I have just created two activities namely , Main_Activity and Other_Activity, and i haven't done anything to them yet.

Please give the simplest example so that i can learn to implement.

Thanks in advance!!


Solution

  • For example :

    In MainActivity :

    Intent intent = new Intent(this, OtherActivity.class);
    intent.putExtra(OtherActivity.KEY_EXTRA, yourDataObject);
    startActivity(intent);
    

    In OtherActivity :

    public static final String KEY_EXTRA = "com.example.yourapp.KEY_BOOK";
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
    
      String yourDataObject = null;
    
      if (getIntent().hasExtra(KEY_EXTRA)) {
          yourDataObject = getIntent().getStringExtra(KEY_EXTRA);
      } else {
          throw new IllegalArgumentException("Activity cannot find  extras " + KEY_EXTRA);
      }
      // do stuff
    }
    

    More informations here : http://developer.android.com/reference/android/content/Intent.html