如何在 ListView 中设置 Counter 应用
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【中文标题】如何在 ListView 中设置 Counter 应用【英文标题】：How set Counter app inside ListView 【发布时间】：2016-03-25 01:45:13 【问题描述】：首先我创建了一个计数器应用程序，它有两个 Button 和一个 EditText，其中一个 Button 具有增加计数的功能，而另一个具有减少计数的功能，这些结果显示在 EditText 中。 现在我希望将此计数器应用程序放置在 ListView 中。至少需要十个 Counter App 才能放置在 ListView 中。我尝试了一些代码，下面会附上一些图片。
我试过的代码附在下面
反活动
public class CounterActivity extends AppCompatActivity
private ListView lstCount;
private CustomAdapter adapter;
private ArrayList<CountModel> mCount = new ArrayList<CountModel>();
final Context context = this;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_counter);
lstCount = (ListView)findViewById(R.id.lst_counter);
adapter = new CustomAdapter(this,mCount);
lstCount.setAdapter(adapter);
计数器模型
public class CountModel
public EditText edtCount;
public Button btnDec;
public Button btnInc;
public EditText getEdtCount()
return edtCount;
public void setEdtCount(EditText edtCount)
this.edtCount = edtCount;
public Button getBtnDec()
return btnDec;
public void setBtnDec(Button btnDec)
this.btnDec = btnDec;
public Button getBtnInc()
return btnInc;
public void setBtnInc(Button btnInc)
this.btnInc = btnInc;
public CountModel(Button btnDec ,EditText edtCount , Button btnInc)
this.btnDec = btnDec;
this.edtCount = edtCount;
this.btnInc = btnInc;
public CountModel()
自定义适配器
public class CustomAdapter extends BaseAdapter
int counter = 0;
int maxcounter=20;
private ArrayList<CountModel>mCount = new ArrayList<CountModel>();
Context context;
public CustomAdapter(Context context, ArrayList<CountModel> count)
this.context = context;
this.mCount=count;
@Override
public int getCount()
return mCount.size();
@Override
public Object getItem(int position)
return mCount.get(position);
@Override
public long getItemId(int position)
return mCount.indexOf(getItemId(position));
@Override
public View getView(int position, View convertView, ViewGroup parent)
MyViewHolder myViewHolder = null;
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.activity_counter, null);
myViewHolder = new MyViewHolder();
myViewHolder.btnDec = (Button) convertView.findViewById(R.id.btn_dec);
myViewHolder.btnInc = (Button) convertView.findViewById(R.id.btn_inc);
myViewHolder.edtCount = (EditText) convertView.findViewById(R.id.edt_count);
convertView.setTag(myViewHolder);
else
myViewHolder = (MyViewHolder) convertView.getTag();
final String mEdtCount = myViewHolder.edtCount.toString();
myViewHolder.edtCount.setOnEditorActionListener(mCount.get(position).getEdtCount());
myViewHolder.btnDec.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
if (counter >0 && counter <=20)
counter--;
mEdtCount.setText(Integer.toString(counter));
else
if (counter<0)
mEdtCount.setText(Integer.toString(counter));
.mCount.get(position).getBtnDec());
myViewHolder.btnInc.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
counter++;
if (counter >0 && counter <=20)
mEdtCount.setText(Integer.toString(counter));
else if(counter >20)
counter--;
mEdtCount.setText(Integer.toString(maxcounter));
.mCount.get(position).getBtnInc());
return convertView;
private class MyViewHolder
Button btnInc;
Button btnDec;
EditText edtCount;
我正面临这些错误
C:\Users\Rahul\Documents\androidStudioWorkSpace\CounterInListView\app\src\main\java\com\example\rahul\counterinlistview\CustomAdapter.java
Error:(61, 21) error: cannot find symbol variable mEdtCount
Error:(67, 30) error: cannot find symbol method setText(String)
Error:(70, 30) error: cannot find symbol method setText(String)
Error:(74, 10) error: cannot find symbol variable mCount
Error:(80, 30) error: cannot find symbol method setText(String)
Error:(83, 30) error: cannot find symbol method setText(String)
Error:(87, 10) error: cannot find symbol variable mCount
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
Information:BUILD FAILED
【问题讨论】：
【参考方案1】：尝试改变这个：
final String mEdtCount = myViewHolder.edtCount.toString();
到这里：
final EditText mEdtCount = myViewHolder.edtCount;
【讨论】：
【参考方案2】：将此编码部分替换为您的代码
final String mEdtCount = myViewHolder.edtCount.getText().toString();
myViewHolder.edtCount.setOnEditorActionListener(mCount.get(position).getEdtCount());
myViewHolder.btnDec.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
if (counter >0 && counter <=20)
counter--;
myViewHolder.edtCount.setText(Integer.toString(counter));
else
if (counter<0)
myViewHolder.edtCount.setText(Integer.toString(counter));
.mCount.get(position).getBtnDec());
myViewHolder.btnInc.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
counter++;
if (counter >0 && counter <=20)
myViewHolder.edtCount.setText(Integer.toString(counter));
else if(counter >20)
counter--;
myViewHolder.edtCount.setText(Integer.toString(maxcounter));
.mCount.get(position).getBtnInc());
【讨论】：
你做错了，你没有正确获得edittext，而是你使用了字符串，这就是发生错误的原因。 仍然面临这些错误Error:(61, 89) error: incompatible types: EditText cannot be converted to OnEditorActionListener Error:(74, 10) error: cannot find symbol variable mCount Error:(87, 10) error: cannot find symbol variable mCount Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output Error:Execution failed for task ':app:compileDebugJavaWithJavac'. > Compilation failed; see the compiler error output for details.
为什么要使用 setOnEditorActionListener？它的目的是什么？
点击增减按钮显示计数器结果
setOnEditorActionListener 用于 TextViews，因此最好将 TextView 显示为查看您的代码，它将解决您的问题，因为一切正常以上是关于如何在 ListView 中设置 Counter 应用的主要内容，如果未能解决你的问题，请参考以下文章