问题描述
我想实现删除功能,从列表视图中删除的项目。点击文本删除项目项目应在ListView中删除。
我已经试过,但我在code得到一个错误。
我没有对如何纠正错误的想法。
下面是我的code:
公共查看getView(最终诠释的立场,观点convertView,父母的ViewGroup)
{
最后ViewHolder持有人; 如果(convertView == NULL)
{
convertView = inflater.inflate(R.layout.selecteditemlistview,NULL);
持有人=新ViewHolder(); holder.textViewSelectedText =(TextView中)convertView.findViewById(R.id.selectedtext);
holder.price =(TextView中)convertView.findViewById(R.id.selectitemprice);
holder.image =(ImageView的)convertView.findViewById(R.id.selectitemimage);
holder.qty =(EditText上)convertView.findViewById(R.id.selectqty);
holder.total =(TextView中)convertView.findViewById(R.id.price); holder.deleteButton =(TextView中)convertView.findViewById(R.id.delete);
convertView.setTag(保持器);
}
其他
{
支架=(ViewHolder)convertView.getTag();
}
串金额= holder.qty.getText()的toString()。
最终的双重价格1 = Double.parseDouble(itemprice.get(位置));
INT QUT =的Integer.parseInt(holder.qty.getText()的toString());
双总=(价格1 * QUT);
holder.textViewSelectedText.setText(arr1.get(位置));
holder.price.setText(itemprice.get(位置));
holder.image.setImageBitmap(itemimage.get(位置));
holder.total.setText(将String.valueOf(总)); 最后CartItem mCartItem =(CartItem)的getItem(位置);
holder.mTextView.setText(mCartItem.product_name);
holder.deleteButton.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
对象cartItems;
CustomAdapter myAdapter =新CustomAdapter(CustomAdapter.this,R.layout.selecteditemlistview,cartItems);
ListView控件列表视图=(ListView控件)findViewById(R.id.delete);
listview.setAdapter(myAdapter);
cartItems.remove(对象);
myAdapter.notifyDatasetChanged();
} }); 返回convertView;
} 类ViewHolder
{
公众的TextView deleteButton;
公众的TextView mTextView; TextView的textViewSelectedText = NULL;
TextView的价格= NULL;
ImageView的图像= NULL;
的EditText数量= NULL;
TextView的总= NULL;
}
公共类CartItem {
公众诠释身份证;
公共字符串PRODUCT_NAME;
}
确切的错误是在低于code:
holder.deleteButton.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
对象cartItems;
CustomAdapter myAdapter =新CustomAdapter(CustomAdapter.this,R.layout.selecteditemlistview,cartItems);
ListView控件列表视图=(ListView控件)findViewById(R.id.delete);
listview.setAdapter(myAdapter); 对象的文档,删除= arrayAdapter.getItem([位置]);
arrayAdapter.remove(文档,删除); } });
请帮我解决这个问题。谢谢。
这是我的logcat错误:
12月5日至18日:38:04.630:我/的System.out(514):打印
12月5日至18日:38:04.711:我/的System.out(514):152.00]
12月5日至18日:38:04.711:我/的System.out(514):ARR:1
12月5日至18日:38:04.721:我/的System.out(514):152.0
12月5日至18日:38:04.781:D / AndroidRuntime(514):关闭VM
12月5日至18日:38:04.781:W / dalvikvm(514):主题ID = 1:螺纹未捕获的异常退出(组= 0x4001d800)
12月5日至18日:38:04.811:E / AndroidRuntime(514):致命异常:主要
12月5日至18日:38:04.811:E / AndroidRuntime(514):java.lang.ClassCastException:java.lang.String中
12月5日至18日:38:04.811:E / AndroidRuntime(514):在com.customer.CustomAdapter.getView(CustomAdapter.java:106)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.AbsListView.obtainView(AbsListView.java:1315)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.ListView.makeAndAddView(ListView.java:1727)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.ListView.fillDown(ListView.java:652)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.ListView.fillFromTop(ListView.java:709)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.ListView.layoutChildren(ListView.java:1580)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.AbsListView.onLayout(AbsListView.java:1147)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.view.View.layout(View.java:7035)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.RelativeLayout.onLayout(RelativeLayout.java:909)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.view.View.layout(View.java:7035)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.FrameLayout.onLayout(FrameLayout.java:333)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.view.View.layout(View.java:7035)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.view.View.layout(View.java:7035)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.widget.FrameLayout.onLayout(FrameLayout.java:333)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.view.View.layout(View.java:7035)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.view.ViewRoot.performTraversals(ViewRoot.java:1045)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.os.Handler.dispatchMessage(Handler.java:99)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.os.Looper.loop(Looper.java:123)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在android.app.ActivityThread.main(ActivityThread.java:4627)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在java.lang.reflect.Method.invokeNative(本机方法)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在java.lang.reflect.Method.invoke(Method.java:521)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12月5日至18日:38:04.811:E / AndroidRuntime(514):在dalvik.system.NativeStart.main(本机方法)
您需要的是简单地删除您从中填充适配器的数据集项,然后使用通知适配器 notifyDataSetChanged()
holder.deleteButton.setOnClickListener(新OnClickListener(){
公共无效的onClick(视图v){
yourdataset.remove(位置);
notifyDataSetChanged();
}
});
I am trying to implement Delete functional to delete item from the listview. Click On the Text "Remove Item" Item should be removed from the ListView.I have tried but, I am getting an error in the code.I dont have any Idea of how to correct the errors.
Here is my code:
public View getView(final int position, View convertView, ViewGroup parent)
{
final ViewHolder holder;
if (convertView == null)
{
convertView = inflater.inflate(R.layout.selecteditemlistview, null);
holder = new ViewHolder();
holder.textViewSelectedText = (TextView)convertView.findViewById(R.id.selectedtext);
holder.price=(TextView)convertView.findViewById(R.id.selectitemprice);
holder.image=(ImageView)convertView.findViewById(R.id.selectitemimage);
holder.qty=(EditText)convertView.findViewById(R.id.selectqty);
holder.total=(TextView)convertView.findViewById(R.id.price);
holder.deleteButton = (TextView) convertView.findViewById(R.id.delete);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
String amount=holder.qty.getText().toString();
final Double price1=Double.parseDouble(itemprice.get(position));
int qut=Integer.parseInt(holder.qty.getText().toString());
Double total=(price1*qut);
holder.textViewSelectedText.setText(arr1.get(position));
holder.price.setText(itemprice.get(position));
holder.image.setImageBitmap(itemimage.get(position));
holder.total.setText(String.valueOf(total));
final CartItem mCartItem = (CartItem) getItem(position);
holder.mTextView.setText(mCartItem.product_name);
holder.deleteButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Object cartItems;
CustomAdapter myAdapter = new CustomAdapter(CustomAdapter.this, R.layout.selecteditemlistview, cartItems);
ListView listview = (ListView) findViewById(R.id.delete);
listview.setAdapter(myAdapter);
cartItems.remove(object);
myAdapter.notifyDatasetChanged();
}
});
return convertView;
}
class ViewHolder
{
public TextView deleteButton;
public TextView mTextView;
TextView textViewSelectedText = null;
TextView price=null;
ImageView image=null;
EditText qty=null;
TextView total=null;
}
public class CartItem {
public int id;
public String product_name;
}
The Exact error is in the below code:
holder.deleteButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Object cartItems;
CustomAdapter myAdapter = new CustomAdapter(CustomAdapter.this, R.layout.selecteditemlistview, cartItems);
ListView listview = (ListView) findViewById(R.id.delete);
listview.setAdapter(myAdapter);
Object toRemove = arrayAdapter.getItem([POSITION]);
arrayAdapter.remove(toRemove);
}
});
Please Help me to solve this problem. Thank you..
This are my Logcat errors:
05-18 12:38:04.630: I/System.out(514): Printing
05-18 12:38:04.711: I/System.out(514): [152.00]
05-18 12:38:04.711: I/System.out(514): arr: 1
05-18 12:38:04.721: I/System.out(514): 152.0
05-18 12:38:04.781: D/AndroidRuntime(514): Shutting down VM
05-18 12:38:04.781: W/dalvikvm(514): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-18 12:38:04.811: E/AndroidRuntime(514): FATAL EXCEPTION: main
05-18 12:38:04.811: E/AndroidRuntime(514): java.lang.ClassCastException: java.lang.String
05-18 12:38:04.811: E/AndroidRuntime(514): at com.customer.CustomAdapter.getView(CustomAdapter.java:106)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.AbsListView.obtainView(AbsListView.java:1315)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.ListView.makeAndAddView(ListView.java:1727)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.ListView.fillDown(ListView.java:652)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.ListView.fillFromTop(ListView.java:709)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.ListView.layoutChildren(ListView.java:1580)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.AbsListView.onLayout(AbsListView.java:1147)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.view.View.layout(View.java:7035)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:909)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.view.View.layout(View.java:7035)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.view.View.layout(View.java:7035)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.view.View.layout(View.java:7035)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.view.View.layout(View.java:7035)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.view.ViewRoot.performTraversals(ViewRoot.java:1045)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.os.Handler.dispatchMessage(Handler.java:99)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.os.Looper.loop(Looper.java:123)
05-18 12:38:04.811: E/AndroidRuntime(514): at android.app.ActivityThread.main(ActivityThread.java:4627)
05-18 12:38:04.811: E/AndroidRuntime(514): at java.lang.reflect.Method.invokeNative(Native Method)
05-18 12:38:04.811: E/AndroidRuntime(514): at java.lang.reflect.Method.invoke(Method.java:521)
05-18 12:38:04.811: E/AndroidRuntime(514): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-18 12:38:04.811: E/AndroidRuntime(514): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-18 12:38:04.811: E/AndroidRuntime(514): at dalvik.system.NativeStart.main(Native Method)
What you need is simply remove the dataset item from which you are populating your Adapter and then notify the adapter using notifyDataSetChanged()
holder.deleteButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
yourdataset.remove(position);
notifyDataSetChanged();
}
});
这篇关于OnClicking在Android的ListView中删除项目的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!