我在gridviewer添加了一些复选框。但是它们不可见。这是代码：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<ImageView
android:id="@+id/thumbImage"
android:layout_width="300dp"
android:layout_height="100dp"
android:layout_centerInParent="true" />
<CheckBox android:id="@+id/itemCheckBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#ffedff38"
android:backgroundTint="#ff46374b"
android:clickable="true"
android:visibility="visible"
android:layout_weight="0.1"
android:checked ="true"
/>
<ImageButton
android:id="@+id/imgbtn"
android:onClick="VisualizzaInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ff387dff"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginBottom="10dp"
android:src="@drawable/info"
android:alpha="0.7" />
</RelativeLayout>
这是gridview的代码：在本节中，我将复选框添加到gridiview;但是复选框不可见。
public class CustomGallery extends ActionBarActivity {
private int count;
private boolean[] thumbnailsselection;
private String[] arrPath;
private ImageAdapter imageAdapter;
private Context mContext;
private ArrayList<Integer> ordinate = new ArrayList<>();
private int ID;
private static int tot;
private ArrayList<String> imageURLArray = new ArrayList<String>();
private GridView imagegrid;
private static boolean[] check = new boolean[]{false};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
tot = 0;
final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
final String orderBy = MediaStore.Images.Media._ID;
Cursor imagecursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,
null, orderBy);
int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
this.count = imagecursor.getCount();
this.arrPath = new String[this.count];
this.thumbnailsselection = new boolean[this.count];
for (int i = 0; i < this.count; i++) {
imagecursor.moveToPosition(i);
int id = imagecursor.getInt(image_column_index);
int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
arrPath[i]= imagecursor.getString(dataColumnIndex);
}
imageURLArray.clear();
GridView imagegrid = (GridView) findViewById(R.id.gridview);
try {
imageAdapter = new ImageAdapter(this);
} catch (JSONException e) {
e.printStackTrace();
}
imagegrid.setAdapter(imageAdapter);
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
private LayoutInflater mInflater;
public ImageAdapter(Context mContext) throws JSONException {
mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.mContext = mContext;
Collections.sort(SingletonImageCustomize.getIstance().getAllImage(), new DistanceComparator());
String myString = "http://sistemitelematici.altervista.org/";
Intent intent = getIntent();
int id = intent.getIntExtra("userId", -1);
if(isProfilato(id)) {
for (int i = 0; i < 3; i++) {
String s = myString + SingletonImageCustomize.getIstance().getAllImage().get(i).getURLWatson();
ordinate.add(SingletonImageCustomize.getIstance().getAllImage().get(i).getPlaceID());
imageURLArray.add(s);
}
for (int j = 3; j < SingletonImageCustomize.getIstance().getAllImage().size(); j++) {
String t = myString + SingletonImageCustomize.getIstance().getAllImage().get(j).getURL();
ordinate.add(SingletonImageCustomize.getIstance().getAllImage().get(j).getPlaceID());
imageURLArray.add(t);
}
}else {
for (int i = 0; i < SingletonImageCustomize.getIstance().getAllImage().size(); i++) {
String s = myString + SingletonImageCustomize.getIstance().getAllImage().get(i).getURL();
ordinate.add(SingletonImageCustomize.getIstance().getAllImage().get(i).getPlaceID());
imageURLArray.add(s);
}
}
}
public int getCount() {
return imageURLArray.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(
R.layout.galleryitem, null);
holder.imageview = (ImageView) convertView.findViewById(R.id.thumbImage);
//holder.watsonImage = (ImageView) convertView.findViewById(R.id.WImage);
holder.checkbox = (CheckBox) convertView.findViewById(R.id.itemCheckBox);
holder.btn = (ImageButton) convertView.findViewById(R.id.imgbtn);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
holder.checkbox.setId(position);
holder.imageview.setId(position);
//holder.watsonImage.setId(position);
holder.btn.setId(position);
holder.checkbox.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
CheckBox cb = (CheckBox) v;
int id = cb.getId();
if (thumbnailsselection[id]) {
cb.setChecked(false);
thumbnailsselection[id] = false;
ID = SingletonImageCustomize.getIstance().getImgID().get(id);
SingletonImageCustomize.getIstance().removeIDMappa(ID);
tot--;
} else {
cb.setChecked(true);
thumbnailsselection[id] = true;
ID = ordinate.get(id);
SingletonImageCustomize.getIstance().addIDMappa(ID);
tot++;
}
}
});
holder.btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
ImageButton imgBtn = (ImageButton) v;
int id = imgBtn.getId();
VisualizzaInfo(v,id);
}
});
Picasso.with(mContext).load(imageURLArray.get(position)).into(holder.imageview);
holder.checkbox.setChecked(thumbnailsselection[position]);
holder.id = position;
position--;
return convertView;
}
}
class ViewHolder {
ImageView imageview;
//ImageView watsonImage;
CheckBox checkbox;
ImageButton btn;
int id;
}
public boolean isProfilato(int userID) throws JSONException {
boolean profilato = false;
HTTPRequest httpRequest = new HTTPRequest();
Log.i("ID", String.valueOf(userID));
httpRequest.execute("estraiProfilo", "http://sistemitelematici.altervista.org/Php/GetProfilato.php", String.valueOf(userID));
jSonParser js = null;
JSONArray httpResponse = null;
try {
httpResponse = httpRequest.get();
js = new jSonParser(httpResponse);
} catch (InterruptedException e) {
//Toast.makeText(MyCustomAdapter.this, "La richiesta non � stata portata a termine, per favore riprovare", Toast.LENGTH_SHORT).show();
e.printStackTrace();
} catch (ExecutionException e) {
//Toast.makeText(MyCustomAdapter.this, "La richiesta non � stata portata a termine, per favore riprovare", Toast.LENGTH_SHORT).show();
e.printStackTrace();
} catch (NullPointerException e) {
//Toast.makeText(MyCustomAdapter.this, "La richiesta non � stata portata a termine, per favore riprovare", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
String parser = js.getUserName("profilato");
if(parser.toString().equals("1"))
profilato = true;
return profilato;
}
public void VisualizzaItinerario(View view){
if(tot == 0 )
Toast.makeText(CustomGallery.this, "Selezionare almeno una destinazione!", Toast.LENGTH_SHORT).show();
if(tot <= 8 && tot > 0) {
Intent intent = new Intent(this, MappaItinerario.class);
Intent i = getIntent();
int id = i.getIntExtra("userId", -1);
intent.putExtra("userId", id);
imageURLArray.clear();
startActivity(intent);
}else {
Toast.makeText(CustomGallery.this, "E' possibile inserire al più 8 destinazioni!", Toast.LENGTH_SHORT).show();
}
}
public void VisualizzaInfo(View v,int id){
Intent intent = new Intent(this, Info.class);
Intent i = getIntent();
int key = ordinate.get(id);
int idUser = i.getIntExtra("userId", -1);
intent.putExtra("userId",idUser);
intent.putExtra("imageID",key);
startActivity(intent);
}
}
我该如何解决？
答案 0 :(得分：0)
holder.checkbox.bringToFront();
在适配器中设置imageview的值后尝试此行。我认为这不会解决整个问题，但至少您的复选框将是可见的。如果您找到了更好的答案，请发布。这将是有帮助的
android:buttonTint="@color/white"
android:background="@color/blue"
在xml的复选框属性中添加这两行，希望这会有所帮助。