這篇文章主要為大家展示了Android如何實現(xiàn)購物車加減功能，內(nèi)容簡而易懂，希望大家可以學(xué)習(xí)一下，學(xué)習(xí)完之后肯定會有收獲的，下面讓小編帶大家一起來看看吧。
創(chuàng)新互聯(lián)網(wǎng)站設(shè)計，為客戶量身定制各類網(wǎng)站建設(shè)業(yè)務(wù)，包括企業(yè)型、電子商務(wù)型、響應(yīng)式網(wǎng)站建設(shè)、行業(yè)門戶型等各類網(wǎng)站，實戰(zhàn)經(jīng)驗豐富，成功案例眾多。以客戶利益為出發(fā)點，創(chuàng)新互聯(lián)網(wǎng)站制作為客戶規(guī)劃、按需定制網(wǎng)站符合企業(yè)需求、帶有營銷價值的網(wǎng)絡(luò)建站方案認(rèn)真對待每一個客戶，我們不用口頭的語言來吹擂我們的優(yōu)秀，上千家的成功案例見證著我們的成長。
Android 實現(xiàn)購物車加減功能，效果圖如下所示：
重慶分公司
重慶分公司
public class adderView extends LinearLayout implements View.OnClickListener, TextWatcher {
private int amount = 0; //購買數(shù)量
private int goods_storage = Integer.MAX_VALUE; //商品庫存
private OnAmountChangeListener mListener;
private EditText etAmount;
private Button btnDecrease;
private Button btnIncrease;
public adderView(Context context) {
this(context, null);
}
public adderView(Context context, AttributeSet attrs) {
super(context, attrs);
LayoutInflater.from(context).inflate(R.layout.number_adder, this);
etAmount = (EditText) findViewById(R.id.etAmount);
btnDecrease = (Button) findViewById(R.id.btnDecrease);
btnIncrease = (Button) findViewById(R.id.btnIncrease);
btnDecrease.setOnClickListener(this);
btnIncrease.setOnClickListener(this);
etAmount.addTextChangedListener(this);
TypedArray obtainStyledAttributes = getContext().obtainStyledAttributes(attrs, R.styleable.AmountView);
int btnWidth = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_btnWidth, 100);
int tvWidth = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_tvWidth, 200);
int tvTextSize = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_tvTextSize, 0);
int btnTextSize = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_btnTextSize, 0);
obtainStyledAttributes.recycle();
LayoutParams btnParams = new LayoutParams(btnWidth, LayoutParams.MATCH_PARENT);
btnDecrease.setLayoutParams(btnParams);
btnIncrease.setLayoutParams(btnParams);
if (btnTextSize != 0) {
btnDecrease.setTextSize(TypedValue.COMPLEX_UNIT_PX, btnTextSize);
btnIncrease.setTextSize(TypedValue.COMPLEX_UNIT_PX, btnTextSize);
}
LayoutParams textParams = new LayoutParams(tvWidth, LayoutParams.MATCH_PARENT);
etAmount.setLayoutParams(textParams);
if (tvTextSize != 0) {
etAmount.setTextSize(tvTextSize);
}
}
public void setOnAmountChangeListener(OnAmountChangeListener onAmountChangeListener) {
this.mListener = onAmountChangeListener;
}
public void setGoods_storage(int goods_storage) {
this.goods_storage = goods_storage;
}
public void setTextCount(int count){
this.amount = count;
this.etAmount.setText(amount+"");
}
@Override
public void onClick(View v) {
int i = v.getId();
if (i == R.id.btnDecrease) {
if (amount > 0) {
amount--;
etAmount.setText(amount + "");
}
} else if (i == R.id.btnIncrease) {
if (amount < goods_storage) {
amount++;
etAmount.setText(amount + "");
}
}
etAmount.clearFocus();
if (mListener != null) {
mListener.onAmountChange(this, amount);
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
if (s.toString().isEmpty())
return;
amount = Integer.valueOf(s.toString());
if (amount > goods_storage) {
etAmount.setText(goods_storage + "");
return;
}
if (amount == 0){
// btnDecrease.setBackgroundResource(R.drawable.jian);
}
if (amount > 0){
// btnDecrease.setBackgroundResource(R.drawable.lvjian);
}
if (mListener != null) {
mListener.onAmountChange(this, amount);
}
}
public interface OnAmountChangeListener {
void onAmountChange(View view, int amount);
}<?xml version="1.0" encoding="utf-8"?>
以上就是關(guān)于Android如何實現(xiàn)購物車加減功能的內(nèi)容，如果你們有學(xué)習(xí)到知識或者技能，可以把它分享出去讓更多的人看到。
