Question

我是android新手。我在我的微调器中显示字符串，当用户选择字符串时，我想使用编辑文本视图输入选定的微调器字符串值（当用户从微调器中选择食物项目时我想使用编辑文本视图输入食物的值10）。我已完成设置微调器项目，但我不知道如何输入选定的微调器值。

这是我的java文件，

public class PaymentsActivity extends Activity implements OnItemSelectedListener {

private Button btnViewExpenses;
private Spinner spinner;
private EditText selectedSpinner;
// array list for spinner adapter
private ArrayList<Category> categoriesList;
ProgressDialog pDialog;

// API urls
// Url to get all categories
private String URL_CATEGORIES = "http://10.0.2.2/category_api/get_categories.php";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.payments);

    selectedSpinner = (EditText) findViewById(R.id.categoryItem);
    spinner = (Spinner) findViewById(R.id.categoryList);
    btnViewExpenses = (Button) findViewById(R.id.btnViewExpenses);

    categoriesList = new ArrayList<Category>();

    // spinner item select listener
    spinner.setOnItemSelectedListener(this);

    new GetCategories().execute();

}

/**
 * Adding spinner data
 * */
private void populateSpinner() {
    List<String> lables = new ArrayList<String>();

//  txtCategory.setText("");

    for (int i = 0; i < categoriesList.size(); i++) {
        lables.add(categoriesList.get(i).getName());
    }

    // Creating adapter for spinner
    ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_spinner_item, lables);

    // Drop down layout style - list view with radio button
    spinnerAdapter
            .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    // attaching data adapter to spinner
    spinner.setAdapter(spinnerAdapter);
}

/**
 * Async task to get all categories
 * */
private class GetCategories extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(PaymentsActivity.this);
        pDialog.setMessage("Loading Expenses Information...");
        pDialog.setCancelable(false);
        pDialog.show();

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        ServiceHandler jsonParser = new ServiceHandler();
        String json = jsonParser.makeServiceCall(URL_CATEGORIES, ServiceHandler.GET);

        Log.e("Response: ", "> " + json);

        if (json != null) {
            try {
                JSONObject jsonObj = new JSONObject(json);
                if (jsonObj != null) {
                    JSONArray categories = jsonObj
                            .getJSONArray("categories");                        

                    for (int i = 0; i < categories.length(); i++) {
                        JSONObject catObj = (JSONObject) categories.get(i);
                        Category cat = new Category(catObj.getInt("id"),
                                catObj.getString("category"));
                        categoriesList.add(cat);
                    }
                }

            } catch (JSONException e) {
                e.printStackTrace();
            }

        } else {
            Log.e("JSON Data", "Didn't receive any data from server!");
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        super.onPostExecute(result);
        if (pDialog.isShowing())
            pDialog.dismiss();
        populateSpinner();
    }

}


@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
        long id) {
    Toast.makeText(
            getApplicationContext(),
                    parent.getItemAtPosition(position).toString() + " Selected" ,
            Toast.LENGTH_LONG).show();

}

@Override
public void onNothingSelected(AdapterView<?> arg0) {        
}

public void onClickViewExpenses(View view){
    Intent viewExpenses = new Intent(this, ExpensesList.class);
    startActivity(viewExpenses);
}
}

这是我的xml文件，

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" 
android:layout_gravity="center_horizontal">

<TextView
    android:id="@+id/accountBalanceView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/labelView"
    android:layout_marginLeft="26dp"
    android:textSize="20dp"
    android:text="Account Balance :" />

<Spinner
    android:id="@+id/categoryList"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true" />

<Button
    android:id="@+id/btnSubmitJobOpenAmount"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/jobOpeningAmount"
    android:layout_alignRight="@+id/accBalanced"
    android:text="Submit" />

<TextView
    android:id="@+id/jobOpeningbalance"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/accountBalanceView"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="18dp"
    android:gravity="center_horizontal"
    android:text="Job Opening Amount"
    android:textSize="20dp" />

<TextView
    android:id="@+id/accBalanced"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignRight="@+id/labelView"
    android:layout_below="@+id/labelView"
    android:layout_marginRight="17dp"
    android:text="10000"
    android:textColor="#FF0040"
    android:textSize="20dp" />

<EditText
    android:id="@+id/jobOpeningAmount"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_above="@+id/categoryList"
    android:layout_alignLeft="@+id/accountBalanceView"
    android:layout_alignRight="@+id/accountBalanceView"
    android:layout_marginBottom="22dp"
    android:ems="10"
    android:inputType="number" >

    <requestFocus />
</EditText>

<EditText
    android:id="@+id/categoryItem"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/jobOpeningAmount"
    android:layout_alignRight="@+id/jobOpeningAmount"
    android:layout_below="@+id/categoryList"
    android:layout_marginTop="46dp"
    android:ems="10"
    android:inputType="number" />

<Button
    android:id="@+id/btnSubmitCategoryItem"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/categoryItem"
    android:layout_alignLeft="@+id/btnSubmitJobOpenAmount"
    android:text="Submit" />

<Button
    android:id="@+id/btnViewExpenses"
    android:onClick="onClickViewExpenses"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="31dp"
    android:text="View Previous Expenses" />

<TextView
    android:id="@+id/labelView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:gravity="center"
    android:padding="10dp"
    android:text="Enter Expenses Here"
    android:textSize="25dp"
    android:textStyle="bold" />

</RelativeLayout>

请帮我做这件事。

Answer 1

使用此功能。

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
    long id) {

   String myStr = spinner.getSelectedItem().toString();
   selectedSpinner.setText(myStr);

}

@Override
public void onNothingSelected(AdapterView<?> arg0) {        
}

Answer 2

试试这个..

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
        long id) {
    Toast.makeText(
            getApplicationContext(),
                    parent.getItemAtPosition(position).toString() + " Selected" ,
            Toast.LENGTH_LONG).show();

       String type = spinner.getSelectedItem().toString().trim();
       selectedSpinner.setText(type);

}

@Override
public void onNothingSelected(AdapterView<?> arg0) {        
}

Answer 3

使用这个......

<强> MainActivity.java

String[] text1 = { "SUNDAY", "MONDAY", "TUESDAY",
        "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY" };
int[] val1 = { 0, 1, 2, 3, 4, 5, 6};


Spinner  spinner1;
TextView  textView1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    textView1 = (TextView)findViewById(R.id.text1);
    spinner1 = (Spinner)findViewById(R.id.spinner1);
    ArrayAdapter<String> adapter1 =
            new ArrayAdapter<String>(MainActivity.this,
                    android.R.layout.simple_spinner_item, text1);
    adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner1.setAdapter(adapter1);
    spinner1.setOnItemSelectedListener(onItemSelectedListener1);
}

OnItemSelectedListener onItemSelectedListener1 =
        new OnItemSelectedListener(){

            @Override
            public void onItemSelected(AdapterView<?> parent, View view,
                                       int position, long id) {
                String s1 = String.valueOf(val1[position]);
                textView1.setText(s1);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {}

        };

XML CODE

    <Spinner
        android:id="@+id/spinner1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/text1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />


</LinearLayout>

将选定的微调器项值设置为编辑文本视图 - Android

3 个答案: