无滚动条GridView少量图片展示_移动开发_编程开发_程序员俱乐部

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.GridView;

public class NoScrollGridView extends GridView {

    private static final String TAG = "NoScrollGridView";
    private static final int BLANK_POSITION = -1;
    private OnTouchBlankPositionListener mTouchBlankPosListener;

    public NoScrollGridView(Context context) {
        super(context);
    }

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

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }

    public interface OnTouchBlankPositionListener {
        boolean onTouchBlankPosition();
    }

    public void setOnTouchBlankPositionListener(OnTouchBlankPositionListener listener) {
        mTouchBlankPosListener = listener;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {

        if (mTouchBlankPosListener != null) {
            if (!isEnabled()) {
                // A disabled view that is clickable still consumes the touch
                // events, it just doesn't respond to them.
                return isClickable() || isLongClickable();
            }
            if (event.getActionMasked() == MotionEvent.ACTION_UP) {
                final int motionPosition = pointToPosition((int) event.getX(), (int) event.getY());
                if (motionPosition == BLANK_POSITION) {
                    return mTouchBlankPosListener.onTouchBlankPosition();
                }
            }
        }
        return super.onTouchEvent(event);
    }
}