java - Android Studio ListView 复选框保存

Question

我已经在 stackoverflow 上查看了有关此问题的其他一些问题，但是我无法将其实现到我的代码中，因为我认为我所做的事情有点不同。我仍在学习 Android Studio，所以请容忍我的任何愚蠢行为。

我希望在当前 ListView 的右侧创建复选框，当用户重新加载应用程序时，选中该复选框将保持该状态。

XML:

<TextView
    android:id="@+id/textView3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:text="Which Will Be Next"
    android:textAllCaps="false"
    android:textColor="#f1b75a"
    android:textSize="32sp"
    android:textStyle="bold"  />

<ListView
    android:id="@+id/results_listview"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_below="@+id/textView3"></ListView>
</RelativeLayout>

Activity 代码:

public class .... extends AppCompatActivity {



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_all_flavour);

    ListView resultListView = (ListView) findViewById(R.id.results_listview);

    HashMap<String, String> nameAddress = new HashMap<>();
    nameAddress.put("exmp ", "Locate");


    List<HashMap<String, String>> listItems = new ArrayList<>();
    SimpleAdapter adapter = new SimpleAdapter(this, listItems, R.layout.list_item, new String[]{"First Address", "Second Address"},new int[]{R.id.tv1, R.id.tv3});

    Iterator it  = nameAddress.entrySet().iterator();
    while (it.hasNext()){
        HashMap<String, String> resultsMap = new HashMap<>();
        Map.Entry pair  = (Map.Entry)it.next();
        resultsMap.put("First Address", pair.getKey().toString());
        resultsMap.put("Second Address", pair.getValue().toString());
        listItems.add(resultsMap);

    }

    resultListView.setAdapter(adapter);


}


}

列出 Items.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<CheckedTextView
    android:id="@+id/tv1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textColor="#ffa200"
    android:textSize="21sp"
    android:textStyle="bold"
    android:drawableLeft="?android:attr/listChoiceIndicatorMultiple"
    />
<CheckedTextView
    android:id="@+id/tv3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textColor="#ffffff"
    android:textSize="16sp"
    android:textStyle="bold"

    />

</LinearLayout>

感谢任何帮助:)

Answer 1

我建议你可以使用Recyclerview代替listview，试试这个方法

public class CardViewDataAdapter extends
  RecyclerView.Adapter<CardViewDataAdapter.ViewHolder> {

 private List<Student> stList;

 public CardViewDataAdapter(List<Student> students) {
  this.stList = students;

 }

 // Create new views
 @Override
 public CardViewDataAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
   int viewType) {
  // create a new view
  View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
    R.layout.cardview_row, null);

  // create ViewHolder

  ViewHolder viewHolder = new ViewHolder(itemLayoutView);

  return viewHolder;
 }

 @Override
 public void onBindViewHolder(ViewHolder viewHolder, int position) {

  final int pos = position;

  viewHolder.tvName.setText(stList.get(position).getName());

  viewHolder.tvEmailId.setText(stList.get(position).getEmailId());

  viewHolder.chkSelected.setChecked(stList.get(position).isSelected());

  viewHolder.chkSelected.setTag(stList.get(position));


  viewHolder.chkSelected.setOnClickListener(new View.OnClickListener() {
   public void onClick(View v) {
    CheckBox cb = (CheckBox) v;
    Student contact = (Student) cb.getTag();

    contact.setSelected(cb.isChecked());
    stList.get(pos).setSelected(cb.isChecked());

    Toast.makeText(
      v.getContext(),
      "Clicked on Checkbox: " + cb.getText() + " is "
        + cb.isChecked(), Toast.LENGTH_LONG).show();
   }
  });

 }

 // Return the size arraylist
 @Override
 public int getItemCount() {
  return stList.size();
 }

 public static class ViewHolder extends RecyclerView.ViewHolder {

  public TextView tvName;
  public TextView tvEmailId;

  public CheckBox chkSelected;

  public Student singlestudent;

  public ViewHolder(View itemLayoutView) {
   super(itemLayoutView);

   tvName = (TextView) itemLayoutView.findViewById(R.id.tvName);

   tvEmailId = (TextView) itemLayoutView.findViewById(R.id.tvEmailId);
   chkSelected = (CheckBox) itemLayoutView
     .findViewById(R.id.chkSelected);

  }

 }

 // method to access in activity after updating selection
 public List<Student> getStudentist() {
  return stList;
 }

}

http://android-pratap.blogspot.in/2015/01/recyclerview-with-checkbox-example.html