dispatchTouchEvent

by Business Talk » Sat, 09 Jan 2010 02:15:29 GMT


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 How can I programmatically press/release a button? I was playing with
the button.dispatchTouchEvent(motionEvent); but failed to
programmatically generate  the MotionEvent to be passed to the
dispatchTouchEvent



dispatchTouchEvent

by Business Talk » Sat, 09 Jan 2010 02:37:37 GMT


 I found the way to generate the MotionEvent, and it's
MotionEvent.obtain



> dispatchTouchEvent


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dispatchTouchEvent

by jbo » Wed, 27 Jan 2010 04:28:07 GMT


 i , i have a qustion about onTouch event, I have a layout that
consist of 2 elements, a WebView and on top of it a TextView and then
a custom view, that expand all over the screen and is transparent.
With these i want to carch touch events and delegate to the correct
widget either TextView or WebView depending on the touch event
position (MoseEvent).

[code]
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<TextView
android:id="@+id/label"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Type here:"/>

<WebView android:id="@+id/webview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@id/label"/>

</RelativeLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">

<com.frame.TransparentPanel android:id="@+id/transparent_panel"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>

</LinearLayout>

</FrameLayout>
[/code]


[code]
public class TransparentPanel extends LinearLayout
{
private Paint innerPaint, borderPaint ;
private List<PointF> pointsToDraw = new ArrayList<PointF>();
private WebView webview;
private Paint touchPaint;

public TransparentPanel(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}

public TransparentPanel(Context context) {
super(context);
init();
}

private void init() {
touchPaint = new Paint();
touchPaint.setARGB(255, 0, 0, 255);
touchPaint .setAntiAlias(true);
touchPaint .setStyle(Style.STROKE);
touchPaint .setStrokeWidth(2);

innerPaint = new Paint();
innerPaint.setARGB(0, 100, 75, 75); //gray
innerPaint.setAntiAlias(true);

borderPaint = new Paint();
borderPaint.setARGB(255, 255, 255, 255);
borderPaint.setAntiAlias(true);
borderPaint.setStyle(Style.STROKE);
borderPaint.setStrokeWidth(2);
}

public void setInnerPaint(Paint innerPaint) {
this.innerPaint = innerPaint;
}

public void setBorderPaint(Paint borderPaint) {
this.borderPaint = borderPaint;
}

@Override
public boolean onTouchEvent(MotionEvent



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Hi,

You can use threads but all the views, and all the views related APIs,
must be invoked from the main thread (also called UI thread.) To do
this from a background thread, you need to use a Handler. A Handler is
an object that will post messages back to the UI thread for you. You
can also use the various post() method from the View class as they
will use a Handler automatically. In your case, you could do something
like this:

private Handler mHandler;

protected void onCreate(Bundle saved) {
   mHandler = new Handler();
}

// In your Thread
public void run() {
   // ...
  mHandler.post(new Runnable() {
    public void run() { popup.dismiss(); }
  });
}

You can also look at the class called UserTask from the
apps-for-android project:
http://code.google.com/p/apps-for-android/source/browse/trunk/Photostream/src/com/google/android/photostream/UserTask.java

It makes threading/UI interactions even easier.






-- 
Romain Guy
www.curious-creature.org

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