我有一个 listView 有 checkTextView 和一个 textView 作为每个 textView 中的项目。checkedTextView 值将从数据库表中填充。对于每个值，数据库中都有一个计时器值为 10、15、30 的列。一旦检查了checkedTextView，我检查计时器列中是否有一个值，如果存在，我设置textView，计时器值每秒更新一次。如果第一个元素具有计时器值，则 textView 会填充计时器 mm:ss 值。当我向下滚动时，会有一些其他的 listView 项目填充了相同的值不正确。
这是因为该位置返回了错误的值吗？我在某处读到当我们滚动时视图会刷新。例如：如果项目 1 填充了该值，当我滚动时我发现元素 6 也具有该值
下面是适配器类
public class MethodLazyAdapter extends BaseAdapter {
Activity activity;
private String[] preparationSteps;
private String[] timeToPrepare;
private String[] arrowValue;
private int [] noOfStepsFlag;
String recipeID;
ListView list;
Intent intent;
Context context;
int minutes;
int noOfSteps;
private HashMap<Integer, Boolean> mIsChecked = new HashMap<Integer, Boolean>();
private ArrayList<Boolean> itemChecked = new ArrayList<Boolean>();
private static LayoutInflater inflater=null;
MediaPlayer player;
String vibratorService;
Vibrator vibrator;
public MethodLazyAdapter(Activity a,String[] preparationSteps,String [] timeToPrepare,String [] arrowValue,int noOfSteps,ListView list) {
this.activity = a;
this.preparationSteps = preparationSteps;
this.timeToPrepare= timeToPrepare;
this.arrowValue=arrowValue;
this.list=list;
this.noOfSteps = noOfSteps;
noOfStepsFlag = new int[noOfSteps];
for(int i=0;i<noOfSteps;i++){
noOfStepsFlag[i]=0;
itemChecked.add(i, false);
}
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public View getView(final int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.method_item, null);
final CheckedTextView checkedTextView = (CheckedTextView)vi.findViewById(R.id.checkedTextView);
checkedTextView.setText(preparationSteps[position]);
final TextView textView = (TextView)vi.findViewById(R.id.textView1);
final AlertDialog.Builder alert = new AlertDialog.Builder(activity);
checkedTextView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
((CheckedTextView) v).toggle();
if(checkedTextView.isChecked())
itemChecked.set(position, true);
else if(!checkedTextView.isChecked())
itemChecked.set(position,false);
if(!timeToPrepare[position].equals("NA") && checkedTextView.isChecked() && noOfStepsFlag[position]==0){
noOfStepsFlag[position]=1;
playAudio();
new CountDownTimer(Integer.parseInt(timeToPrepare[position])*60*1000, 500) { //the timer runs for 30 seconds in this case
public void onTick(long leftTimeInMilliseconds) {
long seconds = leftTimeInMilliseconds / 1000;
textView.setText(String.format("%02d", seconds / 60) + ":" + String.format("%02d", seconds % 60));
}
public void onFinish() {
textView.setText("Done");
alert.setTitle("Done!!");
alert.setMessage(arrowValue[position]);
alert.setIcon(R.drawable.savai_upma);
playAudio();
vibratorService = Context.VIBRATOR_SERVICE;
vibrator = (Vibrator)activity.getSystemService(vibratorService);
vibrator.vibrate(1000); //vibrate for 1sec.
alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Some code
}
});
alert.show();
}
}.start();
}
}
private void playAudio() {
// TODO Auto-generated method stub
player = MediaPlayer.create(activity, R.raw.facebook_ringtone_pop);
player.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer player) {
// TODO Auto-generated method stub
player.release();
}
});
player.start();
}
});
/*
* The checkedTextView click state is saved in array itemChecked when the row is clicked and by default its set
* to false.
* Outside onClick the checkTextView row will be checked or unchecked from the
* value stored in array itemChecked.
*/
checkedTextView.setChecked(itemChecked.get(position));
return vi;
}
public int getCount() {
return preparationSteps.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
}
checkedTextView 已正确切换，但 textView 值填充不正确。请帮忙。