现在这可能是一个难以理解的问题。
我真正想要的是:要从通话记录中获取不同来电者的填充列表,让用户选择他想要的数量,然后通过点击按钮将它们列入黑名单。
因此,我得出结论,我想要的是以下
结束我想要的:有一个带有标题按钮和项目列表的活动。从项目列表中,用户可以选择任意数量的项目(通过使用复选框来实现,稍后将显示我是如何做到的),然后通过选择标题按钮执行操作。
我做了什么:活动布局:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" >
<LinearLayout android:id="@+id/add_btn_layout" android:layout_width="match_parent" android:layout_height="50dp" android:padding="2dp" >
<Button android:id="@+id/btn_blacklist_sender" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="21dp" >
</Button>
</LinearLayout>
<ListView android:id="@+id/list_chose_to_blacklist" android:layout_width="wrap_content" android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
行布局:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" android:padding="2dp" >
<CheckBox android:id="@+id/isDelete" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="43dp" android:paddingRight="3dp" />
</LinearLayout>
在活动中:
public class CallerChooseToBlacklistActivity extends Activity {
Button btnBlacklistCaller;
ListView listCallers;
HashSet<String> toBlacklistNumbers = new HashSet<String>();
String caller = "Sender";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chose_to_blacklist);
btnBlacklistCaller = (Button) findViewById(R.id.btn_blacklist_sender);
btnBlacklistCaller.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
BlacklistNumberHelper helper = new BlacklistNumberHelper(
getApplicationContext());
for (String number : toBlacklistNumbers) {
helper.insert(number, DbHelper.TABLE_CALL_BLACKLIST,
DbHelper.C_CALL_BLACKLIST_NO);
}
helper.close();
onResume();
}
});
btnBlacklistCaller.setText(getString(R.string.btn_blacklist_caller));
listCallers = (ListView) findViewById(R.id.list_chose_to_blacklist);
}
@Override
protected void onResume() {
super.onResume();
String[] projection = new String[] { CallLog.Calls._ID,
CallLog.Calls.NUMBER };
Cursor cursor = getContentResolver().query(CallLog.Calls.CONTENT_URI,
projection, null, null, null);
for (int idx = 0; idx < cursor.getColumnCount(); idx++) {
Log.d(MainActivity.TAG, idx + ":" + cursor.getColumnName(idx));
}
HashSet<String> distinctCallers = new HashSet<String>();
ArrayList<String> allreadyBlacklisted = (new BlacklistNumberHelper(
getApplicationContext())).getAllNumbers(
DbHelper.TABLE_CALL_BLACKLIST, DbHelper.C_CALL_BLACKLIST_NO);
if (cursor.moveToFirst()) {
for (int i = 0; i < cursor.getCount(); i++) {
try {
String address = cursor.getString(
cursor.getColumnIndexOrThrow("number")).toString();
boolean isPresent = false;
for (String no : allreadyBlacklisted)
if (no.equalsIgnoreCase(address)) {
isPresent = true;
break;
}
if (!isPresent)
distinctCallers.add(address);
cursor.moveToNext();
} catch (IllegalArgumentException e) {
}
}
}
ArrayList<HashMap<String, String>> fillMaps = new ArrayList<HashMap<String, String>>();
for (String address : distinctCallers) {
HashMap<String, String> map = new HashMap<String, String>();
map.put(caller, address);
fillMaps.add(map);
}
String[] from = { caller };
int[] to = { R.id.isDelete };
SimpleAdapter cursorAdapter = new SimpleAdapter(this, fillMaps,
R.layout.row_blacklist, from, to);
cursorAdapter.setViewBinder(VIEW_BINDER);
listCallers.setAdapter(cursorAdapter);
}
// custom binder to bind columns customally
final ViewBinder VIEW_BINDER = new ViewBinder() {
public boolean setViewValue(View view, Object arg1, String arg2) {
if (view.getId() == R.id.isDelete) {
CheckBox cb = (CheckBox) view;
cb.setText(arg2);
cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
String text = buttonView.getText().toString();
if (isChecked)
toBlacklistNumbers.add(text);
else if (toBlacklistNumbers.contains(text))
toBlacklistNumbers.remove(text);
}
});
return true;
} else {
return false;
}
}
};
}
问题是什么:当我选择一个项目并向下滚动并通过向上滚动所选项目返回时,所选项目上的检查发生了变化。虽然当我查看哈希集时toBlacklistNumbers
,我最初选择的数字只是在那里。这意味着当我点击标题按钮时,它会将其列入黑名单。要从哈希集中删除它,我必须先选择它,然后取消选择它。但这不是我想要的。
当我向下滚动列表时,我不希望该项目被取消选择。这显然不是 android 版本的问题,因为我在 Android 2.2 和 Android 4.1 上检查过它
更新:通过更改选定的项目,我的意思是我选择的项目不再被选中,而是选择了它上面或下面的任何项目。另外,当我向下滚动时,下面列表中的许多项目也会被自动选择