Recently, I faced a problem where I needed two different applications to communicate a simple message between each other. I searched around and found many questions regarding this problem. However, there were a lot of vague answers as well.
I figured I would write this in case someone else faced a similar issue and needed a starting point to work from.
Here was the issue I faced:
- The user opens TestAppOne and there is a check to see if TestAppTwo exists.
- For this example we will say that TRUE is returned.
- Since TestAppTwo exists we open it using startActivityForResult(Intent, int).
- When the user is done with TestAppTwo they click a button which sends them back to TestAppOne with the resultCode
- Call finish() on TestAppTwo.
class TestAppOne extends Activity {
//...
private final void startOtherApp() {
//...
// Here we pass "1" to TestAppTwo
this.startActivityForResult(intent, 1);
//...
}
@Override protected void onActivityResult(int pRequestCode, int pResultCode, Intent pData) {
super.onActivityResult(pRequestCode, pResultCode, pData);
// Check the result code that was sent from the calling activity
if( pResultCode == 1 ) {
// The result was successfully sent and received
} else {
// There is something wrong
}
}
}
class TestAppTwo extends Activity {
//...
private void someMethod() {
//...
// Set the result here to be passed back to TestAppOne
this.setResult(1);
this.finish();
}
}
Credits go to:
Android Developer Reference
Let's Share Some Thoughts
Android Forums
