我有一个简单的问题。我有一个SeekBar列表。我的要求是当用户将第一个SeekBar拖动到70％时，下一个应停在30％。在我的情况下，如何将SeekBar进度停止到特定值或％？
public class ProductsAdapter extends BaseAdapter {
private ArrayList<Products> list;
//private LayoutInflater layoutInflater;
private int shelfShareSum;
private int remainingShelfShare;
private static HashMap<String, Integer> shelfShareValues = new HashMap<String, Integer>();
private HashMap<Integer, Integer> productShelfShareMap = new HashMap<Integer, Integer>();
private Context con;
private SQLiteDatabase database;
private SQLiteOpenHelper dbHelper;
//SparseIntArray seekbarValuePos = new SparseIntArray();
public ProductsAdapter(Context context, ArrayList<Products> list){
this.list = list;
//layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
dbHelper = new DBHelper(context);
database = dbHelper.getWritableDatabase();
this.con = context;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
final shelfShareHolder holder;
if (row == null){
LayoutInflater mInflater = (LayoutInflater) con.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = mInflater.inflate(R.layout.shelf_share_list_view, null);
holder = new shelfShareHolder();
holder.productTextView = (TextView) row.findViewById(R.id.shelfShareProductTextView);
holder.percentTextView = (TextView) row.findViewById(R.id.seekbarValue);
holder.shelfShareSeekbar = (SeekBar) row.findViewById(R.id.seekBar1);
row.setTag(holder);
}else {
holder = (shelfShareHolder) row.getTag();
}
Products p = list.get(position);
//int pID = p.getProductID();
int prog = p.getSetSlider();
holder.shelfShareSeekbar.setProgress(list.get(position).getSetSlider());
holder.shelfShareSeekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
//shelfShareSum = progress;
holder.percentTextView.setText(String.valueOf(progress));
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
remainingShelfShare = 100 - shelfShareSum;
Integer preV = productShelfShareMap.get(((Products)list.get(position)).getProductID());
if(preV == null){
holder.shelfShareSeekbar.setMax(remainingShelfShare);
}else {
holder.shelfShareSeekbar.setMax(Integer.parseInt(holder.percentTextView.getText().toString()) + remainingShelfShare);
}
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
/*shelfShareSum +=Integer.parseInt(seekBarValue.getText().toString());
Log.i("SUM", "onStopTrackingTouch: "+shelfShareSum);
seekBar.setMax(shelfShareSum);*/
list.get(position).setSetSlider(seekBar.getProgress());
shelfShareSum = 0;
//remainingShelfShare = 100;
productShelfShareMap.put(((Products)list.get(position)).getProductID(), Integer.parseInt(holder.percentTextView.getText().toString()));
for (HashMap.Entry<Integer, Integer> entry : productShelfShareMap.entrySet()){
shelfShareSum += entry.getValue();
}
shelfShareValues.put(((Products)list.get(position)).getShelfShareID()+"-"+((Products)list.get(position)).getProductID(), Integer.parseInt(holder.percentTextView.getText().toString()));
//shelfShareValues.put(((Products)list.get(position)).getShelfShareID()+"-"+((Products)list.get(position)).getCategoryID(), Integer.parseInt(holder.percentTextView.getText().toString())+"-"+((Products)list.get(position)).getProductID());
//Info.getInstance().setShelfSharePercent(shelfShareValues);
}
});
holder.productTextView.setText(((Products)list.get(position)).getProductName());
return row;
}
public static HashMap<String, Integer> sendshelfShareValuesMap(){
return shelfShareValues;
}
private static class shelfShareHolder{
TextView productTextView;
SeekBar shelfShareSeekbar;
TextView percentTextView;
}
}
答案 0 :(得分：2)
为了有这种行为，我们可以有一个指针，它的值可以使任何搜索栏最多可以达到多少％。并且可以在每次拖动时更新。
对于下面的演示，我假设我们从服务器获得的任何进度值都是正确的，就像你告诉我的那样。
ProgressModel.java ：用于存储进度信息的pojo类。
public class ProgressModel {
//default value set to zero
public int progress = 0;
}
ListAdapter.java ：一个虚拟适配器类，它将调整所有具有所需进度逻辑的项目。
public class ListAdapter extends ArrayAdapter<ProgressModel> {
private Context mContext;
private ArrayList<ProgressModel> mProgressModels;
//set default to 100.
private int currentMaxProgress = 100;
public void setCurrentMaxProgress(int progress) {
currentMaxProgress = progress;
}
public ListAdapter(Context context, ArrayList<ProgressModel> progressModels) {
super(context, R.layout.list_item, progressModels);
mContext = context;
mProgressModels = progressModels;
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
ViewHolder holder = new ViewHolder();
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
holder.seekBar = convertView.findViewById(R.id.seekBar);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final ProgressModel progressModel = mProgressModels.get(position);
holder.seekBar.setProgress(progressModel.progress);
final ViewHolder finalHolder = holder;
holder.seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean b) {
//check how much percentage user has dragged and if it exceeds the max limit, show a warning message, and send the seekbar back to its position
if (progress - progressModel.progress > currentMaxProgress) {
finalHolder.seekBar.setProgress(progressModel.progress);
Toast.makeText(mContext, "Cant go beyond " + currentMaxProgress + "%", Toast.LENGTH_LONG).show();
} else {
progressModel.progress = progress;
notifyDataSetChanged();
updateCurrentMaxProgress();
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
return convertView;
}
//update the currentMaxProgress by iterating over whole array
private void updateCurrentMaxProgress() {
int totalProgress = 0;
for(int i = 0; i < mProgressModels.size(); i++){
totalProgress = totalProgress + mProgressModels.get(i).progress;
}
setCurrentMaxProgress(100 - totalProgress);
}
public static class ViewHolder {
SeekBar seekBar;
}
}
MainActivity.java ：
public class MainActivity extends AppCompatActivity {
ListAdapter mListAdapter;
ArrayList<ProgressModel> mProgressModels = new ArrayList<>();
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView mListView = findViewById(R.id.list_view);
mListAdapter = new ListAdapter(this, mProgressModels);
mListView.setAdapter(mListAdapter);
loadDataFromServer();
}
//assuming from server side it'll always be correct.
public void loadDataFromServer(){
int totalProgress = 0;
for(int i = 1; i<=4; i++){
int progress = i * 10;
ProgressModel progressModel = new ProgressModel();
progressModel.progress = progress;
mProgressModels.add(progressModel);
totalProgress = totalProgress + progress;
}
mListAdapter.setCurrentMaxProgress(100 - totalProgress);
mListAdapter.notifyDataSetChanged();
}
}