key event problem

mpathare · by **mpathare** » Mon May 25, 2009 2:51 pm

Thats right. Also, I haven't used xml for the ScrollView like you. I did it in java. I am stumped...

mangaluve · by **mangaluve** » Mon May 25, 2009 3:02 pm

Hm but if you're using my code, where do you create the scrollview (I cannot see it in your activity). Post the "modification" of my code, that one that's not working, and I can take a look at it

mpathare · by **mpathare** » Mon May 25, 2009 3:19 pm

Here you go.

main.xml

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<?xml version="1.0" encoding="utf-8"?>
 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 
        android:orientation="vertical" 
 
        android:layout_width="fill_parent" 
 
        android:layout_height="fill_parent">
 
        <TextView 
 
                android:text="APPNAME" 
 
                android:textSize="30px" 
 
                android:layout_width="fill_parent" 
 
                android:layout_height="wrap_content"
 
                android:height="35px"
 
                android:layout_weight="1" 
 
                android:gravity="center"/>
 
        <TextView 
 
                android:text="Press the menu button to start" 
 
                android:textSize="15px"
 
                android:height="20px" 
 
                android:layout_width="fill_parent" 
 
                android:layout_height="wrap_content"
 
                android:layout_weight="0" 
 
                android:gravity="center"/>
 
</LinearLayout>
 
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Activity

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public class Test extends Activity {
 
/** Called when the activity is first created. */
 
private MyView mGv;
 
private GameScrollView mGsv;
 
@Override
 
public void onCreate(Bundle savedInstanceState) {
 
    super.onCreate(savedInstanceState);
 
    setContentView(R.layout.main);
 
}
 
@Override
 
public boolean onCreateOptionsMenu(Menu menu) {
 
    boolean result = super.onCreateOptionsMenu(menu);
 
    menu.add(0, 1, 0, "new");
 
    menu.add(0, 2, 0, "exit");
 
    return result;
 
}
 
@Override
 
public boolean onOptionsItemSelected(MenuItem item) {
 
    switch (item.getItemId()) {
 
    case 1:
 
        mGv = new MyView(this);
 
        mGsv = new GameScrollView(this);
 
        mGsv.addView(mGv);
 
        setContentView(mGsv);
 
        return true;
 
    case 2:
 
        finish();
 
        return true;
 
    }
 
    return false;
 
}
 
}
 
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Scroll View

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public class GameScrollView extends ScrollView{
 
        public GameScrollView(Context context) {
 
                super(context);
 
        }
 
        @Override
 
        public boolean onInterceptTouchEvent (MotionEvent ev){
 
                return false;
 
        }
 
}
 
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Child View

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public class MyView extends View implements OnKeyListener, OnTouchListener{
 
        //called by parent view to get the measurement of a child view
 
        @Override
 
        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 
                setMeasuredDimension(480, 400);
 
        }
 
        public MyView(Context context) {
 
                super(context);
 
                this.setOnKeyListener(this);
 
                this.setOnTouchListener(this);
 
        setFocusable(true);
 
        setFocusableInTouchMode(true);
 
        }
 
        @Override 
 
        protected void onDraw(Canvas canvas) {
 
        Paint paint = new Paint();
 
        paint.setColor(0xFFFF0000);
 
        canvas.drawRect(0, 0, 500, 500, paint);         }//end onDraw
 
        @Override
 
        public boolean onKey(View v, int keyCode, KeyEvent event){
 
                if(event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_DPAD_CENTER){
 
                        Log.w("gameview", "inside onkey");
 
                        return true;
 
                }
 
                else{
 
                        return false;
 
                }
 
        }
 
        @Override
 
        public boolean onTouch(View v, MotionEvent event){
 
                return true;
 
        }
 
}
 
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mangaluve · by **mangaluve** » Mon May 25, 2009 3:47 pm

Try to put a call to requestFocus() at the end of the constructor of MyView, at least your code works for me when I try that.. It could be that the View doesnt have focus (the setFocusable only says that it Can have focus)

mpathare · by **mpathare** » Mon May 25, 2009 3:53 pm

Whew! That worked

I don't get my you have to explicitly request focus. I don't need it for touch events...why for key events? Also, why would it not be required when you create the view in xml?

Thanks for all your help man!

mangaluve · by **mangaluve** » Mon May 25, 2009 5:34 pm

Finally

I dont really know, perhaps your View doesn't have focus because you press the menu and create the View there... if you create it in onCreate it will be focused automatically. Also, key events are a little bit different from touch event.. I mean, if you touch the View, it should get focus. But when you press a key, especially the back key, you dont really know which View to focus.

I still got a lot to learn

key event problem

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