我正在使用一个AutoCompleteTextView，当用户键入一个字符时，将显示以该字符开头的单词。但在我的情况下，列表没有显示。
XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginRight="15dp"
android:layout_marginLeft="15dp"
android:layout_marginTop="50dp">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/iv_image"
android:layout_gravity="center_horizontal"
android:adjustViewBounds="true" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:text="Choose File"
android:id="@+id/bt_choose_file"
android:layout_gravity="center_horizontal" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/et_Title"
android:layout_marginTop="30dp"
android:hint="File Name"
android:layout_gravity="center_horizontal"
style="@style/EditText" />
<AutoCompleteTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:hint="Document Type"
android:imeOptions="actionDone"
style="@style/EditText"
android:id="@+id/ac_document_type"
android:layout_gravity="center_horizontal" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="30dp">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Upload"
android:textColor="#fff"
android:textStyle="bold"
android:textSize="25sp"
android:id="@+id/bt_upload"
android:background="@drawable/button_1"
android:layout_marginRight="5dp"
android:layout_weight="1" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Cancel"
android:textColor="#fff"
android:textStyle="bold"
android:textSize="25sp"
android:id="@+id/bt_cancel"
android:background="@drawable/button_1"
android:layout_marginLeft="5dp"
android:layout_weight="1" />
</LinearLayout>
</LinearLayout>
</ScrollView>
</LinearLayout>
代码
public class UploadDocument extends MasterFragment implements View.OnClickListener {
private Button btChooseDoc, btUpload, btCancel;
private EditText etTitle;
private AutoCompleteTextView acDocumentType;
private String[] chooseDocumentArray;
private String userSelection = "";
ImageView image;
private Intent intent;
Bitmap camera, galleryImage;
Uri galleryUri;
private String[] documentsArray;
private ArrayAdapter<String> documentArrayAdapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.upload_docs_fragment, null, false);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
initialize();
}
private void initialize() {
btChooseDoc = (Button) getActivity().findViewById(R.id.bt_choose_file);
acDocumentType = (AutoCompleteTextView) getActivity().findViewById(R.id.ac_document_type);
btUpload = (Button) getActivity().findViewById(R.id.bt_upload);
btCancel = (Button) getActivity().findViewById(R.id.bt_cancel);
image = (ImageView) getActivity().findViewById(R.id.iv_image);
etTitle = (EditText) getActivity().findViewById(R.id.et_Title);
btChooseDoc.setOnClickListener(this);
btUpload.setOnClickListener(this);
}
@Override
public void onClick(View view) {
setUp();
switch (view.getId()) {
case R.id.bt_choose_file:
displayPopup(getActivity(), "Choose File", chooseDocumentArray, btChooseDoc, false, new GetNamePosition() {
@Override
public void getName(String name) {
userSelection = name;
if (userSelection.equals("Gallery")) {
intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, 0);
btChooseDoc.setText("Choose File");
}
if (userSelection.equals("Camera")) {
intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 1);
btChooseDoc.setText("Choose File");
}
if (userSelection.equals("Other")) {
intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("file/*");
startActivityForResult(intent, 2);
btChooseDoc.setText("Choose File");
}
}
@Override
public void getPosition(int position) {
}
});
break;
case R.id.bt_upload:
if (isConnected(getActivity())) {
} else {
Crouton.makeText(getActivity(), "Internet Connection not available", Style.ALERT).show();
}
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Bitmap camera;
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
if (requestCode == 1 && resultCode == getActivity().RESULT_OK) {
camera = (Bitmap) data.getExtras().get("data");
camera.compress(Bitmap.CompressFormat.JPEG, 60, bytes);
galleryImage = Bitmap.createScaledBitmap(galleryImage, 150, 150, false);
image.setImageBitmap(camera);
}
if (requestCode == 0 && resultCode == getActivity().RESULT_OK) {
galleryUri = data.getData();
try {
galleryImage = decodeUri(getActivity(), galleryUri);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
galleryImage.compress(Bitmap.CompressFormat.JPEG, 50, bytes);
galleryImage = Bitmap.createScaledBitmap(galleryImage, 150, 150, false);
image.setImageBitmap(galleryImage);
}
}
private void setUp() {
chooseDocumentArray = getResources().getStringArray(R.array.Choose_Document);
// for documents
documentsArray = getResources().getStringArray(R.array.Document);
Arrays.sort(documentsArray);
documentArrayAdapter = new ArrayAdapter<String>(getActivity(), R.layout.textview, documentsArray);
acDocumentType.setAdapter(documentArrayAdapter);
}
}
我已经正确设置了arrayAdapter，但我仍然没有得到列表
答案 0 :(得分：0)
您是否实施了这些方法：
@Override
public void afterTextChanged(Editable arg0) {}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,int after) {}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {}
答案 1 :(得分：0)
尝试
<AutoCompleteTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:hint="Document Type"
android:imeOptions="actionDone"
style="@style/EditText"
android:id="@+id/ac_document_type"
android:completionThreshold="1"
android:layout_gravity="center_horizontal" />
答案 2 :(得分：0)
在setAdapter（）
之后添加此语句 documentArrayAdapter.notifyDataSetChanged();
答案 3 :(得分：0)
获取数组的所有数据后调用autoTextView.setAdapter()而不是调用adapter.notifyDataSetChanged()
如果您的数组项目再次更改，请致电autoTextView.setAdapter()