本文介绍了问题来选择onViewCreated()中的复选框的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在onViewCreated()中启动应用程序时，我需要自动选择所有复选框.
I need to select automatically all checkboxes when I launch my app in onViewCreated().
使用以下代码:
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
lv = (ListView)getView().findViewById(R.id.listview);
displayPlanetList();
for (int i=0;i<plAdapter.getCount();i++) {
Planet p=plAdapter.getItem(i);
//if(p.getId()==3) {
//System.out.println("NOME PIANETA:" + p.getName());
p.setSelected(true);
//}
p.setSelected(true);
System.out.println("NOME PIANETA2:" + p.isSelected());
}
}
在LOGCAT中，我连续5次看到true，但没有看到复选框处于选中状态(因此视图).
In LOGCAT I see true for 5 times but I don't see checkboxes checked (so the View).
谁可以帮助我?
这就是全部代码:
public class MyListFragment extends Fragment /*implements
CompoundButton.OnCheckedChangeListener, View.OnClickListener*/ {
ListView lv;
ArrayList<Planet> planetList;
static PlanetAdapter plAdapter;
private TextView txtName;
private TextView txtEmail;
private Button btnLogout;
ListView listView;
String user = "";
private Spinner spinner;
String selState;
EditText cristo;
private String zao;
CheckBox ck;
//private SQLiteHandler db;
private SessionManager session;
BirraAdapter biAdapter;
PlanetAdapter.PlanetHolder holder;
private static Context context = null;
private static FragmentActivity mInstance;
ArrayList<Integer> hm=new ArrayList<>();
HashMap<Integer,String> ar=new HashMap<>();
Integer[] imageId = {
R.mipmap.androtuto,
R.mipmap.ic_launcher,
R.mipmap.ic_launcher,
R.mipmap.ic_launcher,
R.mipmap.ok,
/*R.drawable.image6,
R.drawable.image7
Environment.getExternalStorageDirectory()" +
" .getAbsolutePath() + /ordinazioni/16:Maggio:2017-13:36:38 Pm.xml*/
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the custom_spinner_items for this fragment
//super.onDestroy();
SharedPreferences settings = getContext().getSharedPreferences("states", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.clear();
editor.commit();
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_list2, container, false);
//ck=(CheckBox)rootView.findViewById(R.id.chk_box);
//lv = (ListView) rootView.findViewById(R.id.listview);
//ListAdapter listAdapter = new MyListAdapter(getContext());
//lv.setAdapter(listAdapter);
context = getActivity();
mInstance = getActivity();
btnLogout = (Button) rootView.findViewById(R.id.btnLogout);
return rootView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
lv = (ListView)getView().findViewById(R.id.listview);
displayPlanetList();
for (int i=0;i<plAdapter.getCount();i++) {
Planet p=plAdapter.getItem(i);
//if(p.getId()==3) {
// System.out.println("NOME PIANETA:" + p.getName());
p.setSelected(true);
//}
System.out.println("NOME PIANETA2:" + p.isSelected());
}
}
private void displayPlanetList() {
planetList = new ArrayList<Planet>();
planetList.add(new Planet(1, "Margherita", "6", "€", "(pomodoro e mozzarella)"));
planetList.add(new Planet(2,"Diavola", "7","€","(pomodoro,mozzarella e salsiccia piccante)"));
planetList.add(new Planet(3,"Bufalina", "5","€","(pomodoro e mozzarella di bufala)"));
planetList.add(new Planet(4, "Marinara", "5", "€", "(pomodoro)"));
planetList.add(new Planet(5,"Viennese", "4", "€", "(pomodoro,mozzarella e wrustel)"));
plAdapter = new PlanetAdapter(planetList, getContext(),imageId) {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
String pero="";
int la=0;
int pos = lv.getPositionForView(buttonView);
System.out.println("POS:"+pos);
if (pos != ListView.INVALID_POSITION) {
Planet p = planetList.get(pos);
p.setSelected(isChecked);
Toast.makeText(
getActivity(),
"Clicked on Pizza: " + la + ". State: is "
+ isChecked, Toast.LENGTH_SHORT).show();
}
}
};
lv.setAdapter(plAdapter);
}
自定义适配器:
public abstract class PlanetAdapter extends ArrayAdapter<Planet> implements CompoundButton.OnCheckedChangeListener, View.OnClickListener
{
private List<Planet> planetList;
private Context context ;
ArrayList<Birra> objects;
public boolean Checked;
private Integer[] imageId;
String ciao;
static PlanetAdapter plAdapter;
String selState ;
public PlanetAdapter(List<Planet> planetList, Context context,Integer[] imageId) {
super(context, R.layout.single_listview_item,planetList);
this.planetList = planetList;
this.context = context;
this.imageId = imageId;
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
}
@Override
public void onClick(View v) {
}
public class PlanetHolder {
public TextView planetName;
public TextView distView;
public TextView valuta;
public CheckBox chkBox;
// public EditText edit;
public TextView caratteristica;
public TextView id;
public ImageView imageView;
public Spinner spinner;
public NumberPicker np;
}
@Override
public int getCount() {
return planetList.size();
}
@Override
public Planet getItem(int position) {
return planetList.get(position);
}
@Override
public View getView(final int position, final View convertView, final ViewGroup parent) {
View row = convertView;
PlanetHolder holder = null;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(R.layout.single_listview_item, parent, false);
holder = new PlanetHolder();
holder.planetName = (TextView) row.findViewById(R.id.name);
holder.distView = (TextView) row.findViewById(R.id.dist);
holder.valuta = (TextView) row.findViewById(R.id.valuta);
holder.chkBox = (CheckBox) row.findViewById(R.id.chk_box);
// holder.edit = (EditText) row.findViewById(R.id.editText);
holder.spinner = (Spinner) row.findViewById(R.id.simpleSpinner);
holder.np=(NumberPicker)row.findViewById(R.id.np);
// holder.edit2 = (EditText) row.findViewById(R.id.editText2);
// holder.iterator = (Button) row.findViewById(R.id.iterator);
// Button iterator=(Button) row.findViewById(R.id.iterator);
// iterator.setOnClickListener(this.PlanetHolder);
holder.caratteristica=(TextView) row.findViewById(R.id.caratteristica);
holder.imageView = (ImageView) row.findViewById(R.id.ivImage);
// holder.edit.setVisibility(View.GONE);
// holder.edit.setEnabled(false);
holder.spinner.setVisibility(View.GONE);
// holder.edit.setVisibility(View.GONE);
// holder.id = (TextView) row.findViewById(R.id.id);
row.setTag(holder);
} else {
holder = (PlanetHolder) row.getTag();
}
final Planet p = planetList.get(position);
System.out.println("stampato P" + p);
holder.imageView.setImageResource(imageId[position]);
holder.planetName.setText(p.getName());
holder.distView.setText("" + p.getDistance());
holder.valuta.setText("" + p.getValuta());
holder.chkBox.setChecked(p.isSelected());
holder.chkBox.setTag(p);
holder.caratteristica.setText(p.getCaratteristica());
// holder.edit.setEnabled(false);
SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE);
boolean isChecked = states.getBoolean("holder.chkBox" + holder.planetName.getText().toString(), false);
System.out.println(isChecked);
if (isChecked) {
holder.spinner.setVisibility(View.VISIBLE);
holder.np.setVisibility(View.VISIBLE);
} else {
holder.chkBox.setChecked(false);
// holder.edit.setVisibility(View.GONE);
// holder.edit.setEnabled(false);
holder.spinner.setVisibility(View.GONE);
holder.np.setVisibility(View.GONE);
}
final PlanetHolder finalHolder2 = holder;
holder.chkBox.setOnCheckedChangeListener(PlanetAdapter.this);
// final BirraHolder finalHolder = birraHolder;
final PlanetHolder finalHolder = holder;
Planet z=getItem(position);
System.out.println(z);
final PlanetHolder finalHolder1 = holder;
final PlanetHolder finalHolder3 = holder;
holder.chkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
if (finalHolder.chkBox.isChecked()) {
// finalHolder.edit.setVisibility(View.VISIBLE);
// finalHolder.edit.setEnabled(true);
finalHolder.spinner.setVisibility(View.VISIBLE);
finalHolder.np.setVisibility(View.VISIBLE);
finalHolder.np.setMaxValue(10);
finalHolder.np.setMinValue(0);
finalHolder.np.setWrapSelectorWheel(true);
// finalHolder.np.getMinValue();
// System.out.println("valore picker alla selezione della checkbox"+finalHolder.np.getMinValue());
// finalHolder.edit2.setVisibility(View.VISIBLE);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
getContext(),
R.array.country_arrays,
android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//finalHolder.spinner.setAdapter(adapter);
finalHolder.spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
finalHolder.spinner.setSelection(position);
// selState = finalHolder.spinner.getSelectedItem().toString();
// p.setQuantità(finalHolder.edit.getText().toString().trim());
p.setTipo(finalHolder.spinner.getSelectedItem().toString());
// finalHolder.edit2.setText(selState);
// System.out.println(selState);
System.out.println("p.getTipo()"+p.getTipo());
/* Toast.makeText(
getContext(),
"Clicked on Planet: " + selState + "", Toast.LENGTH_SHORT).show();*/
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
finalHolder.np.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
p.setQuantità2(newVal);
System.out.println(p.getQuantità2());
SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = states.edit();
editor.putInt("finalHolder.picker" + finalHolder.planetName.getText().toString(), finalHolder.np.getId());
editor.commit();
}
});
SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = states.edit();
editor.putBoolean("holder.chkBox" + finalHolder.planetName.getText().toString(), true);
editor.commit();
/* SharedPreferences states = getContext().getSharedPreferences("states", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = states.edit();
editor.putBoolean("holder.chkBox" + finalHolder.planetName.getText().toString(), true);
editor.commit();*/
//Utility.putPizzaItem(p);
//Utility.getPizzaItem(p);
} else {
finalHolder.spinner.setVisibility(View.GONE);
finalHolder.np.setVisibility(View.GONE);
finalHolder.np.setValue(0);
}
}
});
return row;
}
推荐答案
在for循环结束后，尝试使用plAdapter.notifyDataSetChanged().设置完值后，在适配器中，必须刷新列表视图.
Try with plAdapter.notifyDataSetChanged() after for loop ends. In adapter after set the value, you have to refresh the listview.
这篇关于问题来选择onViewCreated()中的复选框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！