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Android学习资源分享合集(1)-视频资源
效果图:
源码地址(github)
最近写了一个收银键盘，键盘主要是根据GridView+EditText结合来写的.
1.GridView如下：
"2dp"
android:verticalSpacing="2dp"
android:inputType="numberDecimal"
android:editable="false"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:numColumns="3"
android:id="@+id/gridview"> 复制代码2.然后自己写了一个PayKeyAdapter，设置了键盘的文字和类型。
public class PayKeyAdapter extends BaseAdapter {
private Context mContext;
private Context context;
public PayKeyAdapter(Context context) {
this.context=context;
}
private String[] texts = {
//九宫格图片下方文字的设置
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
".",
"0",
"✖"
};
private String[] types = {
//存放在text的tag中
"num",
"num",
"num",
"num",
"num",
"num",
"num",
"num",
"num",
"point",
"num",
"back",
};
@Override
public int getCount() {
return texts.length;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View view, ViewGroup viewgroup) {
ImgTextWrapper wrapper;
if(view==null) {
wrapper = new ImgTextWrapper();
LayoutInflater inflater = LayoutInflater.from(context);
view = inflater.inflate(R.layout.grid_menu_item_pay, null);
view.setTag(wrapper);
view.setPadding(26, 26, 26, 26); //每格的间距
} else {
wrapper = (ImgTextWrapper)view.getTag();
}
wrapper.textView = (TextView)view.findViewById(R.id.GridTextView);
wrapper.iv_back= (ImageView) view.findViewById(R.id.iv_back);
if (position<11){
wrapper.textView.setVisibility(View.VISIBLE);
wrapper.iv_back.setVisibility(View.GONE);
wrapper.textView.setText(texts[position]);
}else {
wrapper.textView.setVisibility(View.GONE);
wrapper.iv_back.setVisibility(View.VISIBLE);
}
wrapper.textView.setTag(types[position]);
if(types[position].equals("back")
|| types[position].equals("cancel")
|| types[position].equals("equal")){
// wrapper.textView.setBackgroundResource(R.drawable.btn_cell_delete);
}else if(types[position].equals("pay")){
// wrapper.textView.setBackgroundResource(R.drawable.btn_cell_pay);
// wrapper.textView.setTextColor(Color.WHITE);
}
// wrapper.textView = (TextView)view.findViewById(R.id.GridItemText);
// wrapper.textView.setText(texts[position]);
// wrapper.textView.setTag(payTypes[position]);
return view;
}
class ImgTextWrapper {
ImageView iv_back;
TextView textView;
}
}复制代码3.核心的语法在GridView的setOnItemClickListener事件.
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView adapterView, View view, int i, long l) {
String keyType = view.findViewById(R.id.GridTextView).getTag().toString();
String textValue = ((TextView)view.findViewById(R.id.GridTextView)).getText().toString();
String editText = editMemberAmount.getText().toString();
if(keyType.equals("num")){
//数字键
try{
String orgValue = numList.get(numIndex);
if(editText.equals("0")){
editMemberAmount.setText(textValue);
}else{
//小数点最多只能后两位
if(orgValue.equals("0.00")){
orgValue=textValue;
numList.set(numIndex, textValue);
editMemberAmount.setText(textValue);
return;
}
if(orgValue.lastIndexOf(".")!=-1 && orgValue.lastIndexOf(".")"只能输入小数点后两位",Toast.LENGTH_SHORT).show();
}else{
if(editText.length()>=18){
Toast.makeText(getApplicationContext(),"一次输入算式无法超过18个字符",Toast.LENGTH_SHORT).show();
return;
}
int numLen = orgValue.length();
if(orgValue.lastIndexOf(".")!=-1){
numLen = orgValue.lastIndexOf(".")+1;
}
if(numLen==7){
Toast.makeText(getApplicationContext(),"收款金额不能超过7位数",Toast.LENGTH_SHORT).show();
}else{
numList.set(numIndex, orgValue+textValue);
editMemberAmount.setText(editText+textValue);
}
}
}
}catch(Exception e){
numIndex=0;
numList=new ArrayList();
numList.add(textValue);
editMemberAmount.setText(textValue);
}
}
if(keyType.equals("back")){
//退格
try{
if(editText.lastIndexOf("+") == editText.length()-1){
//最后为加则减少一位
numList.set(numIndex,"");
numIndex--;
editMemberAmount.setText(editText.substring(0,editText.length()-1));
}else{
String orgValue = numList.get(numIndex);
if(!orgValue.equals("")){
numList.set(numIndex, orgValue.substring(0,orgValue.length()-1));
}
if(editText.equals("0")||editText.length()==1){
editMemberAmount.setText("0.00");
numList.set(numIndex,"0.00");
}else{
editMemberAmount.setText(editText.substring(0,editText.length()-1));
}
}
}catch(Exception e){
numIndex=0;
numList=new ArrayList();
numList.add("0");
editMemberAmount.setText("");
}
}
if(keyType.equals("point")){
//小数点
try{
String orgValue = numList.get(numIndex);
if(orgValue.lastIndexOf(".")!=-1){
Toast.makeText(getApplicationContext(),"已存在小数点",Toast.LENGTH_SHORT).show();
}else{
if(editText.lastIndexOf("+") == editText.length()-1){
//最后为加则补0
numList.set(numIndex, orgValue+"0"+textValue);
editMemberAmount.setText(editText+"0"+textValue);
}else{
numList.set(numIndex, orgValue+textValue);
editMemberAmount.setText(editText+textValue);
}
}
}catch(Exception e){
numIndex=0;
numList=new ArrayList();
numList.add("0.");
editMemberAmount.setText("0.");
}
}
}
});复制代码 4.具体的完整项目请访问我的github，地址在上方已贴出.
我的公众号如下，希望大家多多支持：