public class AmountView extends LinearLayout implements View.OnClickListener, TextWatcher {
private static final String TAG =
"AmountView";
private int amount =
1;
private int goods_storage =
1;
private OnAmountChangeListener mListener;
private EditText etAmount;
private Button btnDecrease;
private Button btnIncrease;
public AmountView(Context context) {
this(context,
null);
}
public AmountView(Context context, AttributeSet attrs) {
super(context, attrs);
LayoutInflater.from(context).inflate(R.layout.view_amount,
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, LayoutParams.WRAP_CONTENT);
int tvWidth = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_tvWidth,
80);
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;
}
@Override
public void onClick(View v) {
int i = v.getId();
if (i == R.id.btnDecrease) {
if (amount >
1) {
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 (mListener !=
null) {
mListener.onAmountChange(
this, amount);
}
}
public interface OnAmountChangeListener {
void onAmountChange(View view,
int amount);
}
}
<LinearLayout xmlns:android=
"http://schemas.android.com/apk/res/android"
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:focusable=
"true"
android:divider=
"@drawable/divider"
android:background=
"@drawable/bg_amount_layout"
android:showDividers=
"middle"
android:orientation=
"horizontal">
<Button
android:
id=
"@+id/btnDecrease"
android:layout_width=
"0dp"
android:layout_height=
"match_parent"
android:layout_weight=
"1"
android:gravity=
"center"
android:background=
"@drawable/btn_amount"
android:
text=
"-"/>
<EditText
android:
id=
"@+id/etAmount"
android:layout_width=
"0dp"
android:layout_height=
"match_parent"
android:minWidth=
"60dp"
android:layout_weight=
"2"
android:background=
"@null"
android:inputType=
"number"
android:gravity=
"center"
android:
text=
"1"/>
<Button
android:
id=
"@+id/btnIncrease"
android:layout_width=
"0dp"
android:layout_height=
"match_parent"
android:layout_weight=
"1"
android:gravity=
"center"
android:background=
"@drawable/btn_amount"
android:
text=
"+"/>
</LinearLayout>
public class MainActivity extends AppCompatActivity {
private AmountView mAmountView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAmountView = (AmountView) findViewById(R.id.amount_view);
mAmountView.setGoods_storage(
50);
mAmountView.setOnAmountChangeListener(
new AmountView.OnAmountChangeListener() {
@Override
public void onAmountChange(View view,
int amount) {
Toast.makeText(getApplicationContext(),
"Amount=> " + amount, Toast.LENGTH_SHORT).show();
}
});
}
}
<tes
.demp3
.AmountView
android:id=
"@+id/amount_view"
android:layout_width=
"match_parent"
android:layout_height=
"match_parent">
</tes
.demp3
.AmountView>
在drawable下三个文件： bg_amount_layout，btn_amount，divider.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#FFFFFF" />
<stroke
android:width="1dp"
android:color="@color/divider" />
<padding
android:bottom="1dp"
android:left="1dp"
android:right="1dp"
android:top="1dp" />
</shape>
<selector
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="@color/divider" />
<item android:state_enabled="false" android:drawable="@color/divider" />
<item android:drawable="@android:color/white" />
</selector>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<size
android:width="0.5dp"/>
<solid android:color="@color/divider"/>
</shape>
atttrs.xml:
<resources>
<declare-styleable name="AmountView">
<attr name="btnWidth" format="dimension" />
<attr name="tvWidth" format="dimension" />
<attr name="tvTextSize" format="dimension"/>
<attr name="btnTextSize" format="dimension"/>
</declare-styleable>
</resources>
colors.xml:
<resources>
<color name="colorPrimary">#3F51B5
</color>
<color name="colorPrimaryDark">#303F9F
</color>
<color name="colorAccent">#FF4081
</color>
<color name="divider">#ffd2d2d2
</color>
</resources>
