Question

我有一个CheckBox对话框，每次我在对话框中选择一些项目然后关闭对话框，然后重新打开对话框，我之前选择的所有项目都消失了。

这是我的代码

set_repeat_days = (LinearLayout)findViewById(R.id.repeat_days);
    set_repeat_days.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            final ArrayList<Integer> mSelectedItems = new ArrayList();
            AlertDialog.Builder builder = new AlertDialog.Builder(SettingsActivity.this);

            String[] days = new String[]{"Monday", "Thursday", "Wednesday", "Tuesday", "Friday", "Saturday", "Sunday"};

            final boolean[] checkedDays = new boolean[]{true, true, true, true, true, true, true};

            builder.setMultiChoiceItems(days, checkedDays, new DialogInterface.OnMultiChoiceClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int which, boolean isChecked) {

                    if (isChecked){
                        mSelectedItems.add(which);
                    }else if (mSelectedItems.contains(which)){
                        mSelectedItems.remove(Integer.valueOf(which));
                    }
                }
            });
            // Specify the dialog is not cancelable
            builder.setCancelable(false);
            builder.setTitle("Repeat");

            // Set the positive/yes button click listener
            builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {

                }
            });

            // Set the neutral/cancel button click listener
            builder.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {

                }
            });
            AlertDialog dialog = builder.create();
            dialog.show();
        }
    });

Answer 1

您可以使用这两个功能来保存和加载数据。

private void save(final boolean[] isChecked) {
SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
 for(Integer i = 0; i < isChecked.length; i++)
 {
 editor.putBoolean(i.toString(), isChecked[i]);
 }
 editor.commit();
}

private boolean[] load() {
SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE);
boolean [] reChecked = new boolean[itemChecked.length];
for(Integer i = 0; i < itemChecked.length; i++)
{
     reChecked[i] = sharedPreferences.getBoolean(i.toString(), false);
}
return reChecked;
}

保存复选框对话框使用SharedPreferences选择项目

1 个答案: