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问题描述
我有一个ListView由code下面显示了CustomAdapter来填充数据。
1）在ListView行是可以点击的onItemClick我出现两个按钮夺回/审查。
2）。当我点击其他行这是在previous行应隐藏可见的按钮。
3）。当我滚动列表中的所有按钮都看不见再次，这是不应该的。
我已经实现了点没有。 1本code，但我怎么能达到2,3。我怎么能修改适配器 getView（）方法或 onItemClick（）使事情工作正确的。
//初始化列表视图与适配器
AttempListView.setAdapter（新AttemptedExcerciseAdapter（mAttem precord，AttemptedExercise.this））;
//不同的适配器类放置值
公共类AttemptedExcerciseAdapter延伸BaseAdapter {
的HashMap＆LT;整数，AttemptedRecord＆GT; mHashMap;
上下文mContext;
的LinearLayout mLLButton;公共AttemptedExcerciseAdapter（）{
// TODO自动生成构造函数存根
}公共AttemptedExcerciseAdapter（HashMap的＆LT;整数，AttemptedRecord＆GT; mAttem precord，上下文mContext）{
this.mHashMap = mAttem precord;
this.mContext = mContext;
}
@覆盖
公众诠释的getCount（）{
返回mHashMap.size（）;
}
@覆盖
公共对象的getItem（INT为arg0）{
返回null;
}
@覆盖
众长getItemId（INT为arg0）{
返回0;
}
@覆盖
公共查看getView（最终诠释的立场，观点convertView，ViewGroup中ARG2）{
如果（convertView == NULL）{
@燮pressWarnings（静态访问）
LayoutInflater layoutInflater =（LayoutInflater）mContext.getSystemService（AttemptedExercise.LAYOUT_INFLATER_SERVICE）;
convertView = layoutInflater.inflate（R.layout.exerciselistlayout，NULL）;
} TextView的attempChapter_name =（TextView中）convertView.findViewById（R.id.TVchapterexercisechapterName）;
TextView的attemptQues =（TextView中）convertView.findViewById（R.id.tvexercisesuccessrate）;
TextView的attemptSR =（TextView中）convertView.findViewById（R.id.tvexerciseperquestiontime）; 按钮ReviewButton =（按钮）convertView.findViewById（R.id.ReviewButton）;
按钮RetakeButton =（按钮）convertView.findViewById（R.id.RetakeButton）;
的LinearLayout mLLtext =（的LinearLayout）convertView.findViewById（R.id.LLText）;
mLLButton =（的LinearLayout）convertView.findViewById（R.id.LLButton）; mLLButton.setVisibility（View.INVISIBLE）;
mLLtext.setVisibility（View.VISIBLE）;
的System.out.println（数据值是...+职位+ mHashMap.get（位置+ 1）.getChapter_name（））; attempChapter_name.setText（mHashMap.get（位置+1）.getChapter_name（））;
attemptQues.setText（+ mHashMap.get（位置+ 1）.getTimePerQues（）+秒/疑问句）;
attemptSR.setText（+ mHashMap.get（位置+1）.getSuccess_rate（）+％）; 返回convertView;
}
}
//项目点击监听器列表视图
公共类ExcerciseItemClickListener实现OnItemClickListener {
的ArrayList＆LT;整数GT; rowNo =新的ArrayList＆LT;整数GT;（）; @覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;为arg0，ARG1观，诠释ARG2，长ARG3）{ 的System.out.println（点击工作...+ ARG2）; arg1.findViewById（R.id.LLButton）.setVisibility（View.INVISIBLE）; rowNo.clear（）; rowNo.add（ARG2）; 如果（rowNo.size（）== 1）
{
AttemptedRecord mRecordExcerciseItem = mAttem precord.get（ARG2 + 1）; 最终诠释chapter_id = mRecordExcerciseItem.getChapter_id（）;
最终诠释test_id = mRecordExcerciseItem.getTest_id（）;
最终诠释subject_id = mRecordExcerciseItem.getSubject_id（）; 的System.out.println（企图列表的大小是......+ mAttem precord.size（））; arg1.findViewById（R.id.LLText）.setVisibility（View.INVISIBLE）;
arg1.findViewById（R.id.LLTake）.setVisibility（View.INVISIBLE）;
arg1.findViewById（R.id.LLButton）.setVisibility（View.VISIBLE）; 按钮复习=（按钮）arg1.findViewById（R.id.ReviewButton）;
按钮重拍=（按钮）arg1.findViewById（R.id.RetakeButton）; review.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{ DBHelper mDbHelper =新DBHelper（AttemptedExercise.this）;
mDbHelper.createOrOpenDatabase（仪表盘）;
光标chpater_exercise_Cursor = mDbHelper.rawQuery（选择practice_test_summary current_test_id那里test_id =+ test_id +的顺序由test_datetime递减限制1）; chpater_exercise_Cursor.moveToFirst（）; 长current_test_id = chpater_exercise_Cursor.getLong（0）;
chpater_exercise_Cursor.close（）; 的System.out.println（当前测试的id值是......+ current_test_id）; 意图reviewIntent =新意图（AttemptedExercise.this，PracticeReview.class）;
reviewIntent.addFlags（Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NO_HISTORY）;
如果（current_test_id大于0）{
reviewIntent.putExtra（current_test_id，current_test_id）;
startActivity（reviewIntent）;
}
}
}）; retake.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
的System.out.println（测试值id试验开始时是...+ test_id）;
Toast.makeText（AttemptedExercise.thischapter_id+ chapter_id +COURSE_ID+test_id+ test_id +subject_id+ subject_id，Toast.LENGTH_LONG）.show（）;
StartTest（4，subject_id，chapter_id，test_id）;
}
}）;
}
}
}
解决方案
如果你能奶源添加在 getView ClickListeners code>像这样
convertView.setOnClickListener（新OnClickListener（）{ @覆盖
公共无效的onClick（视图v）{
curruntButtonClickPosition =位置;
//可见你在这里按钮
notifyDataSetChanged（）;
}
}）;
和 getView
如果（curruntButtonClickPosition =位置）
// mLLButton可见
其他
// mLLButton无形
添加 curruntButtonClickPosition 在 AttemptedExcerciseAdapter 类地球仪变量和-1初始化。
I have a listview to populate data with a CustomAdapter as shown below by code.
1.) The listview rows are clickable and onItemClick I show up two buttons retake/review.
2.) When I click on other row the buttons which were visible on the previous row should hide.
3.) When I scroll the list all buttons are again invisible , that should not happen.
I have achieved the point no. 1 by this code , but how could I achieve 2,3. How could I modify getView() method of adapter or onItemClick() so that things work proper.
//Initialized listview with adapter
AttempListView.setAdapter(new AttemptedExcerciseAdapter(mAttempRecord,AttemptedExercise.this));
//A different adapter class to place values
public class AttemptedExcerciseAdapter extends BaseAdapter{
HashMap<Integer, AttemptedRecord> mHashMap;
Context mContext;
LinearLayout mLLButton;
public AttemptedExcerciseAdapter() {
// TODO Auto-generated constructor stub
}
public AttemptedExcerciseAdapter(HashMap<Integer, AttemptedRecord> mAttempRecord,Context mContext) {
this.mHashMap = mAttempRecord;
this.mContext=mContext;
}
@Override
public int getCount() {
return mHashMap.size();
}
@Override
public Object getItem(int arg0) {
return null;
}
@Override
public long getItemId(int arg0) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup arg2) {
if (convertView == null) {
@SuppressWarnings("static-access")
LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(AttemptedExercise.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.exerciselistlayout, null);
}
TextView attempChapter_name = (TextView) convertView.findViewById(R.id.TVchapterexercisechapterName);
TextView attemptQues = (TextView) convertView.findViewById(R.id.tvexercisesuccessrate);
TextView attemptSR = (TextView) convertView.findViewById(R.id.tvexerciseperquestiontime);
Button ReviewButton = (Button) convertView.findViewById(R.id.ReviewButton);
Button RetakeButton = (Button) convertView.findViewById(R.id.RetakeButton);
LinearLayout mLLtext = (LinearLayout) convertView.findViewById(R.id.LLText);
mLLButton = (LinearLayout) convertView.findViewById(R.id.LLButton);
mLLButton.setVisibility(View.INVISIBLE);
mLLtext.setVisibility(View.VISIBLE);
System.out.println("data value is..."+position+mHashMap.get(position + 1).getChapter_name());
attempChapter_name.setText(mHashMap.get(position+1).getChapter_name());
attemptQues.setText(" " + mHashMap.get(position+1).getTimePerQues() + " sec/ques");
attemptSR.setText(" " + mHashMap.get(position+1).getSuccess_rate() + " %");
return convertView;
}
}
//Item click listener for listview
public class ExcerciseItemClickListener implements OnItemClickListener {
ArrayList<Integer> rowNo=new ArrayList<Integer>();
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
System.out.println("click working..."+arg2);
arg1.findViewById(R.id.LLButton).setVisibility(View.INVISIBLE);
rowNo.clear();
rowNo.add(arg2);
if(rowNo.size()==1)
{
AttemptedRecord mRecordExcerciseItem = mAttempRecord.get(arg2 + 1);
final int chapter_id = mRecordExcerciseItem.getChapter_id();
final int test_id = mRecordExcerciseItem.getTest_id();
final int subject_id = mRecordExcerciseItem.getSubject_id();
System.out.println("attempted list size is..."+mAttempRecord.size());
arg1.findViewById(R.id.LLText).setVisibility(View.INVISIBLE);
arg1.findViewById(R.id.LLTake).setVisibility(View.INVISIBLE);
arg1.findViewById(R.id.LLButton).setVisibility(View.VISIBLE);
Button review=(Button) arg1.findViewById(R.id.ReviewButton);
Button retake=(Button) arg1.findViewById(R.id.RetakeButton);
review.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DBHelper mDbHelper = new DBHelper(AttemptedExercise.this);
mDbHelper.createOrOpenDatabase("Dashboard");
Cursor chpater_exercise_Cursor = mDbHelper.rawQuery("select current_test_id from practice_test_summary where test_id="+test_id+" order by test_datetime desc limit 1");
chpater_exercise_Cursor.moveToFirst();
Long current_test_id =chpater_exercise_Cursor.getLong(0);
chpater_exercise_Cursor.close();
System.out.println("value of current test id is...."+current_test_id);
Intent reviewIntent = new Intent(AttemptedExercise.this, PracticeReview.class);
reviewIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NO_HISTORY);
if (current_test_id > 0) {
reviewIntent.putExtra("current_test_id", current_test_id);
startActivity(reviewIntent);
}
}
});
retake.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("test id value when test starts is... "+test_id);
Toast.makeText(AttemptedExercise.this, "chapter_id" + chapter_id + " course_id" + " test_id" + test_id + " subject_id" + subject_id, Toast.LENGTH_LONG).show();
StartTest(4, subject_id, chapter_id, test_id);
}
});
}
}
}
解决方案
if you can mange to add ClickListeners of the list in getView like this
convertView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
curruntButtonClickPosition=position;
//Visible you button here
notifyDataSetChanged();
}
});
and in getView
if(curruntButtonClickPosition=position)
//mLLButton visible
else
//mLLButton invisible
add curruntButtonClickPosition globle variable in AttemptedExcerciseAdapter class and init with -1.
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