设置 activity 无法在平板电脑上打开

Question

我已经正确设置了 pref_general、它的值以及运行意图的代码：

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        Intent intecao = new Intent(characterList.this, SettingsActivity.class);
        startActivity(intecao);
        return true;
    }

    return super.onOptionsItemSelected(item);
}

因此，如果我点击选项弹出窗口中的设置，它将在我的 phone/7" 平板电脑中正确打开，但对于更大的平板电脑，例如 9" 或更大，它会给我一个空白屏幕弹出窗口上面什么也没有写，例如：

我该如何解决这个问题？造成这种情况的原因是什么？

--- 编辑 ---

这是我的 pref_general:

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <PreferenceCategory
        android:title="Made by Megafuji and Kintups"/>

    <ListPreference
        android:key="console1"
        android:title="Console"
        android:summary="Select your console"
        android:defaultValue="1"
        android:entries="@array/pref_example_list_titles"
        android:entryValues="@array/pref_example_list_values"
        android:negativeButtonText="@null"
        android:positiveButtonText="@null" />

    <ListPreference
        android:key="viewMode"
        android:title="View Mode"
        android:summary="Select your View Mode"
        android:defaultValue="1"
        android:entries="@array/pref_viewMode_list_titles"
        android:entryValues="@array/pref_viewMode_list_values"
        android:negativeButtonText="@null"
        android:positiveButtonText="@null" />

    <ListPreference
        android:key="charsize"
        android:title="Icons Size"
        android:summary="Select character screen size for text and icons."
        android:defaultValue="1"
        android:entries="@array/pref_character_size"
        android:entryValues="@array/pref_character_size_value"
        android:negativeButtonText="@null"
        android:positiveButtonText="@null" />

    <ListPreference
        android:key="tamanhoLetra"
        android:title="Font Size"
        android:summary="Select font size you want for move list."
        android:defaultValue="1"
        android:entries="@array/pref_font_size"
        android:entryValues="@array/pref_font_size_value"
        android:negativeButtonText="@null"
        android:positiveButtonText="@null" />

    <CheckBoxPreference
        android:key="screenDimming"
        android:title="Disable screen dimming in this app"
        android:summary="Disable screen locking/turning off."
        android:defaultValue="false"
        />

    <CheckBoxPreference
        android:key="frame"
        android:title="Show Frame Date"
        android:summary="Show Frame Data for All Moves "
        android:defaultValue="false"
        />

    <CheckBoxPreference
        android:key="damage"
        android:title="Show Damage"
        android:summary="Show Damage for All Moves "
        android:defaultValue="false" />

    <PreferenceCategory
        android:title="Contact us: mkxmoves@gmail.com"/>
</PreferenceScreen>

Answer 1

您的 XML 平板电脑中的设置视图很可能没有您的实际设置视图元素。

您可以阅读 Android docs 以了解有关支持多视图的更多信息。基本上，自动设置的规则会导致 XML 使用平板电脑而非手机的视图。

它应该看起来像这样：

res/layout/my_layout.xml             // layout for normal screen size ("default")
res/layout-large/my_layout.xml       // layout for large screen size
res/layout-xlarge/my_layout.xml      // layout for extra-large screen size
res/layout-xlarge-land/my_layout.xml // layout for extra-large in landscape orientation

删除 XML 文件或更新它以包含您想要的设置元素。

Answer 2

找到答案了！

在 Android Developer Settings 之后我需要做的就是，如果我正在为 Android 3.0（API 级别 11）和更高版本开发，我需要使用 Preference Fragments，这是另一个 class 扩展 PreferenceFragment.

因此代码将使用这些参数：

public static class SettingsFragment extends PreferenceFragment {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Load the preferences from an XML resource
        addPreferencesFromResource(R.xml.preferences);
    }
    ...
}

和旧的 SettingsActivity 现在必须扩展 Activity 而不是 PreferenceActivity，如下所示：

public class SettingsActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Display the fragment as the main content.
        getFragmentManager().beginTransaction()
                .replace(android.R.id.content, new SettingsFragment())
                .commit();
    }
}

Answer 3

            public class SettingActivity extends PreferenceActivity
            {
                @Override
                protected void onCreate(Bundle savedInstanceState) 
                {
                    setTheme(android.R.style.Theme_Holo_Light_DarkActionBar);
                    requestWindowFeature(Window.FEATURE_ACTION_BAR);
                    super.onCreate(savedInstanceState);

                    FragmentManager mFragmentManager = getFragmentManager();
                    FragmentTransaction mFragmentTransaction = mFragmentManager
                            .beginTransaction();
                    PrefsFragment mPrefsFragment = new PrefsFragment();
                    mFragmentTransaction.replace(android.R.id.content, mPrefsFragment);
                    mFragmentTransaction.commit();
                }

               public static class PrefsFragment extends PreferenceFragment {

                @Override
                public void onCreate(Bundle savedInstanceState) {
                    super.onCreate(savedInstanceState);

                    // Load the preferences from an XML resource
                    addPreferencesFromResource(R.xml.preferences);
                    String userName;
                    String tmpemail;

                    findPreference("profile_setting_username").setTitle(userName);
                    findPreference("profile_setting_username").setSummary(strHtml);
                 }
             }
          }

This is how I have implemeted my Settings Activity and it works on all type of devices.

设置 activity 无法在平板电脑上打开

Settings activity doesn't open on tablet

android

android-settings