increase View Touch Area - Android User Interface

Android examples for User Interface:Touch Event

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Description

increase View Touch Area

Demo Code


//package com.java2s;
import android.graphics.Rect;
import android.util.Log;
import android.view.TouchDelegate;
import android.view.View;

public class Main {
    private static final String TAG = "ComponentHelper";

    public static void increaseTouchArea(final View view, View parent,
            final int pixels) {
        if (parent == null) {
            Log.w(TAG,/*from w  w w  .j  a v  a2 s.  c o  m*/
                    "The parent for the exit button is null: can't expand the touch area");
        } else {
            parent.post(new Runnable() {
                @Override
                public void run() {
                    Rect delegateArea = new Rect();
                    View delegate = view;
                    delegate.getHitRect(delegateArea);
                    delegateArea.left -= pixels;
                    delegateArea.right += pixels;
                    delegateArea.top -= pixels;
                    delegateArea.bottom += pixels;
                    TouchDelegate expandedArea = new TouchDelegate(
                            delegateArea, delegate);
                    if (View.class.isInstance(delegate.getParent())) {
                        ((View) delegate.getParent())
                                .setTouchDelegate(expandedArea);
                    }
                }
            });
        }
    }
}

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