I am working on an application that requires to monitor MotionEvents
between activities of the application. It
consists of a RootActivity and a ChildActivity. The RootActivity will
open the ChildActivity via an intent which
occurs at the moment the ACTION_DOWN event is received. However, the
RootActivity is suppose to perform some action upon receiving the
corresponding ACTION_UP that is to follow the ACTION_DOWN that was
used to create the ChildActivity. Below is a snippet of code to help
with the explanation. This code works fine up to 1.6 of Android.
However, in 2.0 and above of Android this no longer works and I am
unable to receive any MotionEvents on the RootActivity once the
ChildActivity has been created.
Questions:
- How can I recieve the corresponding ACTION_UP on the RootActivity
once the ChildActivity has been created?
- Is there any way to know using code the state of the screen to check
if it is being pressed or not?
Code:
public class RootActivity extends Activity implements OnTouchListener
{
private ListView list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.rootview);
list = (ListView) findViewById(R.id.rootlist);
list.setOnTouchListener(this);
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
// Print Log
return super.dispatchTouchEvent(ev);
}
public boolean onTouch(View v, MotionEvent event) {
switch( event.getAction() ) {
case MotionEvent.ACTION_DOWN:
Intent intent = new
Intent(actions.CREATE_CHILD_ACTIVITY);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(intent);
break;
case MotionEvent.ACTION_UP:
//Perform some action
break;
}
return true;
}
}
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