Android(安卓)购物车加减功能的实现代码

Android 实现购物车加减功能，效果图如下所示：

public class adderView extends LinearLayout implements View.OnClickListener, TextWatcher {  private int amount = 0; //购买数量  private int goods_storage = Integer.MAX_VALUE; //商品库存  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"?>

到此这篇关于Android 购物车加减功能的实现代码的文章就介绍到这了,更多相关android 购物车加减内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

更多相关文章

随机推荐