Use onactivityresult android

Question

I want to call a method from mainactivity in other actions. To do this, I researched a lot and found that using OnActivityResult is the best option. Can someone explain how to use this method with an example? I came across similar questions, but found them confusing. Thanks!

EDIT: I have a user dialog in my application. He asks users if they want to start a new game or not, and she has two yes and no buttons. I want to implement the above method just to get the button pressed.

Answer 1

Define a constant

 public static final REQUEST_CODE = 1; 

Invoke your own dialogue with intent

 Intent intent = new Intent(Activity.this, CustomDialogActivity.class); startActivityForResult(intent , REQUEST_CODE); 

Now use onActivityResult to get the result

 @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { try { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) { String requiredValue = data.getStringExtra("Key"); } } catch (Exception ex) { Toast.makeText(Activity.this, ex.toString(), Toast.LENGTH_SHORT).show(); } } 

In user interactive mode, use this code to set the result.

 Intent intent = getIntent(); intent.putExtra("key", value); setResult(RESULT_OK, intent); finish(); 

Answer 2

Here is an example, please check http://developer.android.com/training/basics/intents/result.html

Answer 3

Run action:

you need to pass an additional integer argument to the startActivityForResult () method. You can do this by specifying a constant or just put an integer. The integer argument is the "request code" that identifies your request. When you get an Intent result, the callback provides the same request code so that your application can correctly identify the result and determine how to handle it.

 static final int ASK_QUESTION_REQUEST = 1; // Create an Intent to start SecondActivity Intent askIntent = new Intent(FirstActivity.this, SecondActivity.class); // Start SecondActivity with the request code startActivityForResult(askIntent, ASK_QUESTION_REQUEST); 

Return Result:

After completing your work in the second class of activity, simply set the result and call this activity where it came from, and finally, do not forget to write the finish () statement.

 // Add the required data to be returned to the FirstActivity sendIntent.putExtra(Result_DATA, "Your Data"); // Set the resultCode to Activity.RESULT_OK to // indicate a success and attach the Intent // which contains our result data setResult(RESULT_OK, sendIntent); // With finish() we close the SecondActivity to // return to FirstActivity finish(); 

Get the result:

When you are done with follow-up and return, the system calls your onActivityResult () activity. This method includes three arguments:

@ The request code that you passed to startActivityForResult (). @ The result code indicated by the second action. This is either RESULT_OK if the operation was successful, or RESULT_CANCELED if the operation was not completed @Intent, which carries the result data.

 @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); // check if the request code is same as what is passed here it is 1 if (requestCode == ASK_QUESTION_REQUEST) { // Make sure the request was successful if (resultCode == RESULT_OK) { final String result = data.getStringExtra(SecondActivity.Result_DATA); // Use the data - in this case display it in a Toast. Toast.makeText(this, "Result: " + result, Toast.LENGTH_LONG).show(); } } } 

For more details see this demo. Getting the result from Activity.

Answer 4

1. In your FirstActivity class, write the following code to proceed to the second action using Intent.

 Intent i = new Intent(this, SecondActivity.class); startActivityForResult(i, 100); 

2. In your secondActivity class, write the following code for the onClick event For example: in SecondActivity, if you want to send data back:

 Intent intent= new Intent(); intent.putExtra("result",result); setResult(RESULT_OK,intent); finish(); 

3. Now in your FirstActivity class, write the following code for the onActivityResult () method.

 @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == 100 && resultCode == Activity.RESULT_OK){ String result=data.getStringExtra("result"); Log.e("Result",result); } }