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解决ListView的item含有RadioGroup,滑动错乱问题,从国外大神博借鉴过来的

2016-07-05 22:44 459 查看
直接上代码:

MainActivity

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
private ListView listView;
private ArrayList<Model> dataList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
dataList = new ArrayList<Model>();
setData();
listView = (ListView)findViewById(R.id.ListView01);

CustomListAdapter cadapter = new CustomListAdapter(MainActivity.this, dataList);
listView.setAdapter(cadapter);

}
private void setData(){

Model m = new Model("Ik word op de hoogte gehouden van de ontwikkelingen binnen onze organisatie.");

dataList.add(m);

Model m1 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m1);
Model m2 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m2);
Model m3 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m3);
Model m4 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m4);
Model m5 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m5);
Model m6 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m6);
Model m7 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m7);
Model m8 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m8);
Model m9 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m9);
Model m10 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m10);
Model m11 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m11);
Model m12 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m12);
Model m13 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m13);
Model m14 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m14);
Model m15 = new Model("Ik sta achter de huidige koers van onze organisatie.");
dataList.add(m15);
}
}


适配器类:

import java.util.ArrayList;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;

public class CustomListAdapter extends BaseAdapter {

LayoutInflater inflater;

ArrayList<Model> list;

public CustomListAdapter(Context context, ArrayList<Model> data) {
// TODO Auto-generated constructor stub
inflater = LayoutInflater.from(context);
this.list = data;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return list.get(position);
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View v = convertView;
ViewHolder holder = null;

if (v == null) {
v = inflater.inflate(R.layout.item, parent, false);
holder = new ViewHolder(v);
v.setTag(holder);
holder.group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

public void onCheckedChanged(RadioGroup group,
int checkedId) {
Integer pos = (Integer) group.getTag();
Model element = list.get(pos);

4000
switch (checkedId) { // set the Model to hold the
// answer the user picked
case R.id.answer0:
element.current = Model.ANSWER_ONE_SELECTED;
break;
case R.id.answer1:
element.current = Model.ANSWER_TWO_SELECTED;
break;
case R.id.answer2:
element.current = Model.ANSWER_THREE_SELECTED;
break;
case R.id.answer3:
element.current = Model.ANSWER_FOUR_SELECTED;
break;
default:
element.current = Model.NONE; // Something was
// wrong set to
// the default
}

}
});
} else {
holder = (ViewHolder) v.getTag();
}
holder.group.setTag(new Integer(position)); // I passed the current
// position as a tag

holder.t.setText(list.get(position).question); // Set the question body

if (list.get(position).current != Model.NONE) {
RadioButton r = (RadioButton) holder.group.getChildAt(list.get(position).current);
r.setChecked(true);
} else {
holder.group.clearCheck(); // This is required because although the
// Model could have the current
// position to NONE you could be dealing
// with a previous row where
// the user already picked an answer.

}
return v;
}

class ViewHolder {
TextView t = null;
RadioGroup group;

ViewHolder(View v) {
t = (TextView) v.findViewById(R.id.textView1);
group = (RadioGroup) v.findViewById(R.id.group_me);
}

}

}


model类:

public class Model {

String question; // hold the question
int current = NONE; // hold the answer picked by the user, initial is NONE(see below)
public static final int NONE = 1000; // No answer selected
public static final int ANSWER_ONE_SELECTED = 0; // first answer selected
public static final int ANSWER_TWO_SELECTED = 1; // second answer selected
public static final int ANSWER_THREE_SELECTED = 2; // third answer selected
public static final int ANSWER_FOUR_SELECTED = 3; // forth answer selected

public Model(String question) {
this.question = question;
}

}


布局文件:

item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<RadioGroup
android:id="@+id/group_me"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<RadioButton
android:id="@+id/answer0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="false"
android:text="Ans0" />

<RadioButton
android:id="@+id/answer1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="false"
android:text="Ans1" />

<RadioButton
android:id="@+id/answer2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="false"
android:text="Ans2" />

<RadioButton
android:id="@+id/answer3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="false"
android:text="Ans3" />
</RadioGroup>

</LinearLayout>


main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="nihao" />

<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/ListView01"
></ListView>
</LinearLayout>


githup代码链接:

https://github.com/DevExchanges/RatingBar-ListView
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标签:  RadioGroup 滑动错乱