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我的 Android 应用程序有两个 Spinners（下拉菜单）工作正常。

但是，现在我添加了一个 OptionsMenu：

  1. 一个带有打开 AlertDialog 文本框选项的子菜单。
  2. 一个带有更改语言（区域设置）选项的子菜单。

如果我单击第一个子菜单中的一个选项，我的两个微调器中的内容都会被删除，然后文本框就会打开。当我从文本框中单击自己时，微调器仍然被清除。

同样，如果我单击自己更改语言，两个微调器都会被清除，而程序的其余部分会更新为新语言。通过重新启动应用程序，所有内容都恢复了。

如果重要，微调器会从 ArrayAdapter 获取它们的内容。

所以我想知道，当它们被清除时，我如何更新微调器？我尝试使用 onCreate、onResume 或 onConfigurationChanged 中的代码“重新填充”微调器，但它没有做出任何改变。

如果您需要，我可以找到更多代码，但至少这里有一些：

Spinner spinner1;
Spinner spinner2;
ArrayAdapter<CharSequence> adapter1;
ArrayAdapter<CharSequence> adapter2;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setContentView(R.layout.main);

    spinner1 = (Spinner) findViewById(R.id.spinner1);
    adapter1 = ArrayAdapter.createFromResource(
            this, R.array.some_array, android.R.layout.simple_spinner_item);
    adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner1.setAdapter(adapter1);
    spinner1.setSelection(1);

    // Same procedure for spinner2...
    }


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    Resources res = getResources();
    SubMenu faqMenu = menu.addSubMenu(0, 100, 1, res.getString(R.string.FAQ)).setIcon(android.R.drawable.ic_menu_rotate);
        faqMenu.add(1, 101, 0, R.string.someText);
    SubMenu langMenu = menu.addSubMenu(0, 200, 2, res.getString(R.string.language)).setIcon(android.R.drawable.ic_menu_rotate);
        langMenu.add(1, 201, 0, "Language1");
        langMenu.add(1, 202, 0, "Language2");
        langMenu.add(1, 203, 0, "Language3");
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch(item.getItemId()){

    case 101:
        AlertDialog.Builder textbox = new AlertDialog.Builder(main.this);
        Resources res = getResources();
        textbox.setMessage(res.getString(R.string.someText));
        textbox.show();
        this.setContentView(R.layout.main);
        try{
            spinner1.setAdapter(adapter1);
            spinner2.setAdapter(adapter2);
            spinner1.setSelection(1);
            spinner2.setSelection(2);
        } catch (Exception e){
            e.printStackTrace();
        }
        break;

    case 201:

        Locale locale = new Locale("en"); 
        Locale.setDefault(locale);
        Configuration config = new Configuration();
        config.locale = locale;
        getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
        Toast.makeText(this, "Here is text in Language1! But unfortunately you need to restart the app before the spinners start working again...sorry!", Toast.LENGTH_LONG).show();
        this.setContentView(R.layout.main);
        try{
            spinner1.setAdapter(adapter1);
            spinner2.setAdapter(adapter2);
            spinner1.setSelection(1);
            spinner2.setSelection(2);
        } catch (Exception e){
            e.printStackTrace();
        }
        break;

    // Similar code for options 202, 203

    }
    return super.onOptionsItemSelected(item);
}

final Button button = (Button) findViewById(R.id.button1);
    button.setOnClickListener(new View.OnClickListener() {
        // Perform action on click
        public void onClick(View v) {
            // Make text box
            AlertDialog.Builder textbox = new AlertDialog.Builder(MyActivity.this);
            Resources res = getResources();

            // Get the chosen values from the spinners
            String spinner1choice = spinner1.getSelectedItem().toString();
            String spinner2choice = spinner2.getSelectedItem().toString();

            // Some code for showing the selected items.
     }
}

所以......有人对如何更新/刷新微调器有任何帮助吗？

4

1 回答 1

0

消除 this.setContentView(R.layout.main);

前

 try{
            spinner1.setAdapter(adapter1);
            spinner2.setAdapter(adapter2);
            spinner1.setSelection(1);
            spinner2.setSelection(2);
        } catch (Exception e){
            e.printStackTrace();
        }

在你的两种情况下。

下面的工作代码：

public class TestSpinner extends Activity {

private ArrayAdapter<CharSequence> adapter1;
private Spinner spinner1;
private ArrayAdapter<CharSequence> adapter2;
private Spinner spinner2;

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.spinner);
    spinner1 = (Spinner) findViewById(R.id.spinner1);
    adapter1 = ArrayAdapter.createFromResource(
            this, R.array.planets_array, android.R.layout.simple_spinner_item);
    adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner1.setAdapter(adapter1);
    MyOnItemSelectedListener listener = new MyOnItemSelectedListener();

    spinner1.setOnItemSelectedListener(listener);
    spinner2 = (Spinner) findViewById(R.id.spinner2);
    adapter2 = ArrayAdapter.createFromResource(
            this, R.array.planets_array1, android.R.layout.simple_spinner_item);
    adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner2.setAdapter(adapter1);
    spinner2.setOnItemSelectedListener(listener);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);
    SubMenu faqMenu = menu.addSubMenu(0, 100, 1, "FAQ").setIcon(android.R.drawable.ic_menu_rotate);
    faqMenu.add(1, 101, 0, "set other planents");
    SubMenu langMenu = menu.addSubMenu(0, 200, 2, "LANGAUGE").setIcon(android.R.drawable.ic_menu_rotate);
    langMenu.add(1, 201, 0, "Language1");
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {

        case 101:
            AlertDialog.Builder textbox = new AlertDialog.Builder(TestSpinner.this);
            textbox.setMessage("You've set new planets");
            textbox.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dlg, int i) {
                    dlg.dismiss();
                }
            });
            textbox.show();
            try {
                spinner1.setAdapter(adapter2);
                spinner2.setAdapter(adapter2);
                spinner1.setSelection(1);
                spinner2.setSelection(2);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return true;
        case 201:
            Locale locale = new Locale("en");
            Locale.setDefault(locale);
            Configuration config = new Configuration();
            config.locale = locale;
            getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
            Toast.makeText(this, "you've set old planets back!", Toast.LENGTH_LONG).show();
            try {
                spinner1.setAdapter(adapter1);
                spinner2.setAdapter(adapter1);
                spinner1.setSelection(1);
                spinner2.setSelection(2);
            } catch (Exception e) {
                e.printStackTrace();
            }

            return true;
    }
    return false;
}

public class MyOnItemSelectedListener implements AdapterView.OnItemSelectedListener {
    public void onItemSelected(AdapterView<?> parent,
                               View view, int pos, long id) {
        Toast.makeText(parent.getContext(), "The planet is " +
                parent.getItemAtPosition(pos).toString(), 1).show();
    }

    public void onNothingSelected(AdapterView parent) {
    }
}

private void refresh() {
        finish();
        Intent myIntent = new Intent(TestSpinner.this, TestSpinner.class);
        startActivity(myIntent);
    }
}

干杯

于 2012-02-01T11:12:59.573 回答