单击 ListView 中的项目时,我会在对话框中弹出几个选项供用户选择。但是,在不同的情况下,我想禁用一个或多个选项,以便用户无法选择它们。这是一些代码。
public class MyApp extends ListActivity implements OnItemClickListener, OnItemLongClickListener {
private static final int HOW_MANY = 4;
private static final int ADD = 0;
private static final int EDIT = 1;
private static final int OPEN = 2;
private static final int DELETE = 3;
private String[] myItemClickDialog = null;
...
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.mylayout);
this.myItemClickDialog = new String[HOW_MANY];
this.myItemClickDialog[ADD] = "Add";
this.myItemClickDialog[EDIT] = "Edit";
this.myItemClickDialog[OPEN] = "Open";
this.myItemClickDialog[DELETE] = "Delete";
}
@Override
public final boolean onItemLongClick(final AdapterView<?> parent,
final View view, final int position, final long id) {
final Context context = this;
Builder builder = new Builder(context);
builder.setTitle("Options");
String[] items = this.myItemClickDialog;
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(final DialogInterface dialog, final int which) {
switch (which) {
case ADD:
//Do stuff
break;
case EDIT:
//Do stuff
break;
case OPEN:
//Do stuff
break;
case DELETE:
//Do stuff
break;
}
}
// Rest of code here
我希望能够禁用(通过调暗)特定选项,例如 DELETE 选项或 OPEN 选项,具体取决于单击了哪个列表项(我覆盖了该部分,即检测部分)。