[英]Dynamically creating ImageButtons from an ArrayList to a RelativeLayout in Java
我正在尝试从Android中的ArrayList动态创建ImageButton。 我已经尝试了多种方法来使此工作正常进行,但有时会出现一个神秘的“按钮”,该按钮不在列表中,但仍然会出现。 我使用相对布局,因为基于ArrayList中的项目数,按钮应该具有不同的大小和不同的设计。 任何帮助,将不胜感激。
public void handlers() //throws Exception
{
ArrayList<WarehouseProductItemExt> coffeeItemList = globals.GetCoffeeItems();
for(final WarehouseProductItemExt wpi : coffeeItemList)
{
count ++;
butt = new Button(this);
butt.setBackgroundDrawable(Coffee);
butt.setId(count);
RelativeLayout.LayoutParams params = getLayout(count, coffeeItemList.size());
butt.setLayoutParams(params);
butt.setText(wpi.name);
layout.addView(butt);
butt.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
//Handler handler = new Handler();
//handler.postDelayed(new Runnable() {
//public void run()
//{
//butt.setBackgroundDrawable(Coffee);
// }
//}, 100); // 100ms delay
double price = 0.0;
for(WarehouseProductItemPricing wpip : wpi.prices)
{
if(wpip.idPriceLevelType == 1)
{
price = wpip.price;
}
}
Boolean itemExistsInList = false;
for(TableItems ti : tableItems)
{
if(ti.getIdWarehouseProductItem() == wpi.idWarehouseProductItem)
{
itemExistsInList = true;
Globals globals = Globals.getInstance();
globals.addItemToCart(wpi);
ti.setQuantity(ti.getQuantity() + 1);
}
}
if(!itemExistsInList)
{
TableItems n = new TableItems(wpi.name, 1, price, wpi.idWarehouseProductItem);
Globals globals = Globals.getInstance();
globals.addItemToCart(wpi);
tableItems.add(n);
}
//butt.setBackgroundDrawable(selectButt);
Intent na = new Intent(".ShoppingCartActivity");
startActivity(na);
finish();
}
});
}
private android.widget.RelativeLayout.LayoutParams getLayout(int count, int size)
{
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(200, 360);
switch(size)
{
case 1:
params = new RelativeLayout.LayoutParams(200, 360);
switch(count){
case 1:
params.addRule(RelativeLayout.CENTER_IN_PARENT);
break;
default:
break;
}
break;
case 2:
params = new RelativeLayout.LayoutParams(200, 360);
switch(count){
case 1:
params.addRule(RelativeLayout.CENTER_VERTICAL);
params.setMargins(200, 0, 200, 0);
break;
case 2:
params.addRule(RelativeLayout.RIGHT_OF, 1);
params.addRule(RelativeLayout.CENTER_VERTICAL);
params.setMargins(200, 0, 200, 0);
break;
default:
break;
}
break;
case 3:
params = new RelativeLayout.LayoutParams(200, 360);
switch(count){
case 1:
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.setMargins(200, 0, 0, 0);
break;
case 2:
params.addRule(RelativeLayout.CENTER_IN_PARENT);
params.setMargins(0, 0, 0, 0);
break;
case 3:
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.setMargins(0, 0, 200, 0);
break;
default:
break;
}
break;
case 4:
params = new RelativeLayout.LayoutParams(200, 360);
switch(count){
case 1:
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.setMargins(50, 250, 0, 0);
break;
case 2:
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.addRule(RelativeLayout.RIGHT_OF, 1);
params.setMargins(100, 0, 100, 250);
break;
case 3:
params.addRule(RelativeLayout.RIGHT_OF, 2);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.setMargins(0, 250, 100, 0);
break;
case 4:
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.addRule(RelativeLayout.RIGHT_OF, 3);
params.setMargins(0, 0, 50, 250);
break;
default:
break;
}
break;
case 5:
params = new RelativeLayout.LayoutParams(170, 306);
switch(count){
case 1:
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.setMargins(50, 0, 0, 50);
break;
case 2:
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.addRule(RelativeLayout.RIGHT_OF, 1);
params.setMargins(50, 50, 0, 0);
break;
case 3:
params.addRule(RelativeLayout.RIGHT_OF, 2);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.setMargins(50, 0, 0, 50);
break;
case 4:
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.addRule(RelativeLayout.RIGHT_OF, 3);
params.setMargins(50, 50, 0, 0);
break;
case 5:
params.addRule(RelativeLayout.RIGHT_OF, 4);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.setMargins(50, 0, 0, 50);
break;
default:
break;
}
break;
case 6:
params = new RelativeLayout.LayoutParams(200, 360);
switch(count){
case 1:
params.addRule(RelativeLayout.CENTER_IN_PARENT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.setMargins(0, 0, 0, 0);
break;
case 2:
params.addRule(RelativeLayout.BELOW, 1);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.setMargins(0, 0, 0, 0);
break;
case 3:
params.addRule(RelativeLayout.RIGHT_OF, 2);
params.addRule(RelativeLayout.BELOW, 1);
params.setMargins(100, 0, 100, 0);
break;
case 4:
params.addRule(RelativeLayout.BELOW, 1);
params.addRule(RelativeLayout.CENTER_HORIZONTAL);
params.setMargins(0, 0, 0, 0);
break;
case 5:
params.addRule(RelativeLayout.BELOW, 1);
params.addRule(RelativeLayout.RIGHT_OF, 4);
params.setMargins(100, 0, 100, 0);
break;
case 6:
params.addRule(RelativeLayout.BELOW, 1);
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
params.setMargins(0, 0, 0, 0);
break;
default:
break;
}
break;
case 7:
params = new RelativeLayout.LayoutParams(125, 225);
switch(count){
case 1:
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.setMargins(50, 0, 0, 0);
break;
case 2:
params.addRule(RelativeLayout.RIGHT_OF, 1);
params.addRule(RelativeLayout.ABOVE, 1);
params.setMargins(50, 0, 0, 0);
break;
case 3:
params.addRule(RelativeLayout.RIGHT_OF, 2);
params.addRule(RelativeLayout.ABOVE, 2);
params.setMargins(50, 0, 0, 0);
break;
case 4:
params.addRule(RelativeLayout.CENTER_IN_PARENT);
params.setMargins(0, 0, 0, 0);
break;
case 5:
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
params.setMargins(0, 0, 50, 0);
break;
case 6:
params.addRule(RelativeLayout.BELOW, 7);
params.addRule(RelativeLayout.LEFT_OF, 7);
params.setMargins(0, 0, 50, 0);
break;
case 7:
params.addRule(RelativeLayout.BELOW, 6);
params.addRule(RelativeLayout.LEFT_OF, 6);
params.setMargins(0, 0, 50, 0);
break;
default:
break;
}
break;
case 8:
params = new RelativeLayout.LayoutParams(180, 144);
switch(count){
case 1:
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.width = 180;
params.height = 324;
params.setMargins(200, 50, 20, 0);
break;
case 2:
params.addRule(RelativeLayout.RIGHT_OF, 1);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.width = 180;
params.height = 324;
params.setMargins(20, 50, 20, 0);
break;
case 3:
params.addRule(RelativeLayout.RIGHT_OF, 2);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.width = 180;
params.height = 324;;
params.setMargins(20, 50, 20, 0);
break;
case 4:
params.addRule(RelativeLayout.RIGHT_OF, 3);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.width = 180;
params.height = 324;
params.setMargins(20, 50, 20, 0);
case 5:
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.width = 180;
params.height = 324;
params.setMargins(20, 0, 100, 0);
break;
case 6:
params.addRule(RelativeLayout.LEFT_OF, 5);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.width = 180;
params.height = 324;
params.setMargins(20, 0, 20, 0);
break;
case 7:
params.addRule(RelativeLayout.LEFT_OF, 6);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.width = 180;
params.height = 324;
params.setMargins(20, 0, 20, 0);
break;
case 8:
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.width = 180;
params.height = 324;
params.addRule(RelativeLayout.LEFT_OF, 7);
params.setMargins(0, 0, 20, 0);
break;
default:
break;
}
break;
default:
break;
}
return params;
}
因此,我认为问题可能出在开关盒的格式化问题上? (绝对是菜鸟的错误),但是在通过开关案例缓慢调试之后,我已经解决了问题。 这是一个切换案例的代码,该案例从arrayList动态创建8个ImageButton。
case 8:
params = new RelativeLayout.LayoutParams(180, 144);
switch(count){
case 1:
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.width = 180;
params.height = 324;
params.setMargins(300, 40, 30, 0);
break;
case 2:
params.addRule(RelativeLayout.RIGHT_OF, 1);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.width = 180;
params.height = 324;
params.setMargins(20, 40, 30, 0);
break;
case 3:
params.width = 180;
params.height = 324;
params.addRule(RelativeLayout.RIGHT_OF, 2);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.setMargins(0, 40, 30, 0);
break;
case 4:
params.width = 180;
params.height = 324;
params.addRule(RelativeLayout.RIGHT_OF, 3);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.setMargins(0, 40, 30, 0);
break;
case 5:
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.width = 180;
params.height = 324;
params.setMargins(40, 0, 300, 0);
break;
case 6:
params.addRule(RelativeLayout.LEFT_OF, 5);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.height = 324;
params.width = 180;
params.setMargins(40, 0, 0, 0);
break;
case 7:
params.addRule(RelativeLayout.LEFT_OF, 6);
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.width = 180;
params.height = 324;
params.setMargins(40, 0, 0, 0);
break;
case 8:
params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
params.width = 180;
params.height = 324;
params.addRule(RelativeLayout.LEFT_OF, 7);
break;
default:
break;
}
break;
default:
break;
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