例如,必须绘制图像布局。
我将ImageView
膨胀为布局。当我在屏幕上滑动时,我需要将每个圆圈的颜色更改为绿色。我应该怎么做。我尝试使用手势检测器,但无法获得所需的东西。
这是我的代码。我通过放大图像视图来创建此视图。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(1024);
setContentView(R.layout.test);
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
height = displaymetrics.heightPixels;
width = displaymetrics.widthPixels;
count = width/30;
totalCircles = count * (height/30);
horizontalSpace = width%30;
verticalSpace = height%30;
mRelativeLayout = (RelativeLayout)findViewById(R.id.fl);
mRelativeLayout.setPadding(horizontalSpace/2, verticalSpace/2, horizontalSpace/2, verticalSpace/2);
for(int i=1;i<totalCircles+1;i++){
myButton = new ImageView(this);
myButton.setId(i);
myButton.setImageResource(R.drawable.circle_grey);
LayoutParams lp = new LayoutParams(0,0);
if(i%count != 1){
lp.addRule(RelativeLayout.RIGHT_OF, imgViews.get(i-2).getId());
if(imView != null){
lp.addRule(RelativeLayout.BELOW, imView.getId());
}
if(i%count == 0){
imView = myButton;
}
}else{
if(imView != null){
lp.addRule(RelativeLayout.BELOW, imView.getId());
}
}
mRelativeLayout.addView(myButton,lp);
myButton.getLayoutParams().width = 30;
myButton.getLayoutParams().height = 30;
imgViews.add(myButton);
myButton.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_DOWN){
System.out.println("Inside touch listener");
ImageView imV = (ImageView)v;
imV.setImageResource(R.drawable.circle_green);
}
return false;
}
});
}
}
最佳答案
Jack K Fouani的回答部分正确。代替imagView.onTouch
,您需要使用gridview.onTouch
。
请检查此样本。
gv.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
float currentXPosition = event.getX();
float currentYPosition = event.getY();
int position = gv.pointToPosition((int)currentXPosition, (int) currentYPosition);
//using the position obtained you can change the imageview color.
}
return true;
}
});