[英]Select Spinner item value
So I have this spinner where I want to find what the selected item is. 所以我有一个微调器,我想在其中找到所选项目。 I got something in place to remember what the item which is selected.
我有一些地方可以记住选择了哪个项目。 Now there is a button to click within the same layout where the spinner is, this will bring up a dialog box which tells which item you have selected.
现在,有一个按钮可以在微调器所在的相同布局内单击,这将弹出一个对话框,告诉您选择了哪个项目。 But I am getting error , on my log cat it says "java.lang.NullPointerException"
但是我遇到了错误,在我的日志猫上它显示“ java.lang.NullPointerException”
This is my XML file for the Dialog Box; 这是我用于对话框的XML文件。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffc0c0c0">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Saving's Account"
android:id="@+id/spinnerSelectedText"
android:textColor="#ff000000"
android:drawableLeft="@drawable/transferaccount_icon"
android:drawablePadding="10dp"
android:paddingLeft="10dp"
android:layout_marginTop="10dp"
android:textSize="16sp" />
</RelativeLayout>
This is my java file which is for the dialog ; 这是我用于对话框的java文件;
public class examplefile extends DialogFragment {
public Dialog onCreateDialog(Bundle savedInstanceState) {
final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inf = getActivity().getLayoutInflater();
View theDIalog = inf.inflate(R.layout.makea_transfer_confirm, null);
builder.setView(theDIalog);
builder.setCancelable(true);
return dialog;
}
}
Now this is the screen that you get when you start off - well after the main activity class but I don't want to share the code from main activity since i believe it's not necessary; 现在这是您开始时获得的屏幕-在主要活动课程之后,但是我不想共享主要活动的代码,因为我认为这是没有必要的。
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final View v = inflater.inflate(R.layout.makea_transfer, container, false);
spinner = (Spinner)v.findViewById(R.id.spinnermakeatransfer);
ArrayAdapter adapter = ArrayAdapter.createFromResource(getActivity(), R.array.accounts,R.layout.spinner_item);
adapter.setDropDownViewResource(R.layout.spinner_dropdown_items);
spinner.setAdapter(adapter);
spinner.setPrompt("Select an item");
Spinner spinner1 = (Spinner)v.findViewById(R.id.spinnermakeatransfer);
String spinnerSelectedItem = spinner1.getSelectedItem().toString();
TextView spinnerText = (TextView) v.findViewById(R.id.spinnerSelectedText);
spinnerText.setText(spinnerSelectedItem);
return v;
}
Now this is the makea_transfer XML ; 现在这是makea_transfer XML;
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<Spinner
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/spinnermakeatransfer"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:paddingTop="5dp"
android:spinnerMode="dialog"
android:layout_marginTop="5dp"
android:touchscreenBlocksFocus="false" />
</RelativeLayout>
Please can someone help me fix this issue, please comment if you don't understand or need more details from me. 请有人帮我解决此问题,如果您不了解或需要我提供更多详细信息,请发表评论。
This is the Log Cat Click Here 这是原木猫点击这里
Here : 这里 :
TextView spinnerText = (TextView) v.findViewById(R.id.spinnerSelectedText);
spinnerSelectedText
is inside makea_transfer_confirm
layout but trying to get from makea_transfer
: spinnerSelectedText
在makea_transfer_confirm
布局内,但尝试从makea_transfer
获取:
Get TextView in onCreateDialog
method of examplefile
DialogFragment : 在
examplefile
DialogFragment的onCreateDialog
方法中获取TextView:
View theDIalog = inf.inflate(R.layout.makea_transfer_confirm, null);
builder.setView(theDIalog);
// get TextView here
TextView spinnerText = (TextView) theDIalog.findViewById(R.id.spinnerSelectedText);
And for showing spinnerSelectedItem
value in spinnerText
pass it using examplefile
class using setArguments : 为了在
spinnerText
显示spinnerSelectedItem
值, spinnerText
使用examplefile
使用examplefile
类将其传递给它:
v.findViewById(R.id.maketransferReviewButton).setOnClickListener(
new View.OnClickListener() {
@Override public void onClick(View v) {
SampleDialog fragment = new examplefile();
Bundle args = new Bundle();
args.putString("spinnerText", spinner1.getSelectedItem().toString());
fragment.setArguments(args);
examplefile.show(getFragmentManager(), "make a transfer dialog");
}
});
and inside onCreateDialog get String using getArguments as: 并在onCreateDialog中使用getArguments获取String,方法是:
String strSelectedValueFromSpinner = getArguments().getString("spinnerText");
View theDIalog = inf.inflate(R.layout.makea_transfer_confirm, null);
builder.setView(theDIalog);
// get TextView here
TextView spinnerText = (TextView) theDIalog.findViewById(R.id.spinnerSelectedText);
spinnerText.setText(strSelectedValueFromSpinner);
You need to do like this 你需要这样
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
String spinnerSelectedItem = spinner.getSelectedItem().toString();
Log.i("Selected item : ", items);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
and Delete 和删除
Spinner spinner1 = (Spinner)v.findViewById(R.id.spinnermakeatransfer);
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