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如何在下次打開應用程序時使用共享首選項來存儲我的複選框的狀態？我正在使用一個自定義適配器，所以我猜它必須放在裏面，但我不太確定。使用SharedPreferences在列表視圖中存儲複選框的狀態
我的適配器：
public class MobileArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
private ArrayList<Boolean> itemChecked = new ArrayList<Boolean>();
public MobileArrayAdapter(Context context, String[] values) {
super(context, R.layout.list_adapter, values);
this.context = context;
this.values = values;
for (int i = 0; i < this.getCount(); i++) {
itemChecked.add(i, false);
}
}
@Override
public View getView(final int position, View convertView,
ViewGroup parent) {
View rowView = convertView;
if (rowView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
rowView = inflater.inflate(R.layout.list_adapter,
parent, false);
}
// in your code you search for the CheckBox with the id checkBox1 2 times so I assumed that you are referring to the same view.
CheckBox cBox = (CheckBox) rowView.findViewById(R.id.checkBox1);
cBox.setTextColor(0xFFFFFFFF);
cBox.setText(values[position]);
cBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
itemChecked.set(position, true);
// do some operations here
} else {
itemChecked.set(position, false);
// do some operations here
}
}
});
cBox.setChecked(itemChecked.get(position));
return rowView;
}
}
我的主要活動：
public class TheKevinAndEricaBoxActivity extends Activity {
/** Called when the activity is first created. */
private String[] myString;
private String list;
private String[] myString2;
private String list2;
private static final Random rgenerator = new Random();
private static final Random rgenerator2 = new Random();
MediaPlayer mp;
final Context mContext = this;
final Context context = this;
private Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Resources res = getResources();
addListenerOnButton();
myString = res.getStringArray(R.array.myArray);
list = myString[rgenerator.nextInt(myString.length)];
myString2 = res.getStringArray(R.array.myArray2);
list2 = myString2[rgenerator.nextInt(myString2.length)];
}
public void addListenerOnButton() {
final Context context2 = this;
ImageButton ibg = (ImageButton) findViewById(R.id.buttongallery);
ibg.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(context2, App2Activity.class);
startActivityForResult(intent, 0);
}
});
ImageButton ib = (ImageButton) findViewById(R.id.imagebutton1);
ib.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View erica) {
AlertDialog.Builder b = new AlertDialog.Builder(
TheKevinAndEricaBoxActivity.this);
b.setMessage(myString[rgenerator.nextInt(myString.length)]);
b.setTitle(R.string.title1);
b.setIcon(R.drawable.menuiconerica);
b.setPositiveButton("Back",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
dialog.cancel();
}
});
Dialog d = b.create();
d.show();
}
});
ImageButton ib2 = (ImageButton) findViewById(R.id.imagebutton2);
ib2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View kevin) {
AlertDialog.Builder b = new AlertDialog.Builder(
TheKevinAndEricaBoxActivity.this);
b.setMessage(myString2[rgenerator2.nextInt(myString2.length)]);
b.setTitle(R.string.title2);
b.setIcon(R.drawable.menuiconkevin);
b.setPositiveButton("Back",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
dialog.cancel();
}
});
Dialog d = b.create();
d.show();
}
});
ImageButton Ib3 = (ImageButton) findViewById(R.id.imagebutton3);
Ib3.setOnClickListener(new View.OnClickListener() {
public void onClick(View lemonclick) {
mp = MediaPlayer.create(getApplicationContext(),R.raw.lemonspeech);
mp.start();
}
});
button = (Button) findViewById(R.id.button01);
// add button listener
button.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// custom dialog
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.list);
dialog.setTitle("The List");
// set the custom dialog components - text, image and button
//TextView text = (TextView) dialog.findViewById(R.id.TextView01);
//text.setText("Did you not read the button? :P i'm not finshed on this yet XD");
ListView listView = (ListView) findViewById(R.id.myList);
String[] values = new String[] { "value1", "value2", };
MobileArrayAdapter mAdapter = new MobileArrayAdapter(getBaseContext(), values);
ListView mListView = (ListView) dialog.findViewById(R.id.myList);
mListView.setAdapter(mAdapter);
Button dialogButton = (Button) dialog.findViewById(R.id.Button01);
// if button is clicked, close the custom dialog
dialogButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
});
}
}
什麼是聲名？ – CarbonAssassin 2012-04-23 18:48:20
這不是保存它們：/ – CarbonAssassin 2012-04-23 18:55:04
@CarbonAssassin聲名是來自自定義適配器構造函數String [] values'的String數組。我編輯了我的答案。 – Luksprog 2012-04-23 18:56:30