如何正确设置首选项活动？

Question

我正在设置我的首选项屏幕设置,但我似乎无法让我的偏好活动正常工作.

我创建了一个新的空白活动,称为SettingsActivity扩展PreferenceActivity并setContentView(R.layout.activity_settings);从onCreate方法中删除,并替换为addPreferencesFromResource(R.xml.preferences);.

在我的主要活动类中,SettingsActivity当我点击android默认创建的设置按钮时,我设置了一个新的意图来调用我的类.

我向我添加了一个测试项目preferences.xml并使用此结果运行它.导航栏发生了什么变化？我必须做些什么来添加它吗？Android Studio显示addPreferencesFromResource已弃用.我应该做些什么？

调用SettingsActivity的MainActivity方法

@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 intent = new Intent(this, SettingsActivity.class);
        startActivity(intent);

        return true;
    }

    return super.onOptionsItemSelected(item);
}

SettingsActivity

public class SettingsActivity extends PreferenceActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.preferences);
}

这是我的preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen          
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"   
android:layout_height="match_parent">

<CheckBoxPreference
    android:key="test check box"
    android:title="Test"
    android:defaultValue="false"/>

</PreferenceScreen>

Answer 1

从API 11开始,您应该切换到PreferenceFragment,它允许您从中Activity扩展ActionBarActivity(为您提供操作栏).

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);
    }
    ...
}

public class SettingsActivity extends ActionBarActivity {
    @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();
    }
}

资料来源:http://developer.android.com/guide/topics/ui/settings.html#Fragment