主要活动布局叠加SettingsActivity

时间：2016-07-09 20:12:01

标签： android preferenceactivity

我目前正在尝试开发一个应该具有设置的Android应用程序。我告知我应该使用SettingsActivity。

我的目前看起来像这样：

package de.nocompany.myname.gw2companion;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.preference.*;
import android.support.v4.app.NavUtils;
import android.support.v7.app.ActionBar;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
import android.util.TypedValue;
import android.view.MenuItem;
import android.view.ViewGroup;

import java.util.List;


public class SettingsActivity extends AppCompatPreferenceActivity {

    private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
        @Override
        public boolean onPreferenceChange(Preference preference, Object value) {
            String stringValue = value.toString();

            if (preference instanceof ListPreference) {
                ListPreference listPreference = (ListPreference) preference;
                int index = listPreference.findIndexOfValue(stringValue);

                preference.setSummary(
                        index >= 0
                                ? listPreference.getEntries()[index]
                                : null);

            } else if (preference instanceof RingtonePreference) {
                if (TextUtils.isEmpty(stringValue)) {
                    preference.setSummary(R.string.pref_ringtone_silent);

                } else {
                    Ringtone ringtone = RingtoneManager.getRingtone(
                            preference.getContext(), Uri.parse(stringValue));

                    if (ringtone == null) {
                        preference.setSummary(null);
                    } else {
                        String name = ringtone.getTitle(preference.getContext());
                        preference.setSummary(name);
                    }
                }

            } else {
                preference.setSummary(stringValue);
            }
            return true;
        }
    };

    private static boolean isXLargeTablet(Context context) {
        return (context.getResources().getConfiguration().screenLayout
                & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
    }

    private static void bindPreferenceSummaryToValue(Preference preference) {
        preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

        sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getString(preference.getKey(), ""));
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setupActionBar();
        int horizontalMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2, getResources().getDisplayMetrics());
        int verticalMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2, getResources().getDisplayMetrics());
        int topMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, (int) getResources().getDimension(R.dimen.activity_vertical_margin) + 30, getResources().getDisplayMetrics());
        getListView().setPadding(horizontalMargin, topMargin, horizontalMargin, verticalMargin);
    }

    private void setupActionBar() {
        getLayoutInflater().inflate(R.layout.app_bar, (ViewGroup) findViewById(android.R.id.content));
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);
        }
    }

    @Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            if (!super.onMenuItemSelected(featureId, item)) {
                NavUtils.navigateUpFromSameTask(this);
            }
            return true;
        }
        return super.onMenuItemSelected(featureId, item);
    }

    @Override
    public boolean onIsMultiPane() {
        return isXLargeTablet(this);
    }

    @Override
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public void onBuildHeaders(List<Header> target) {
        loadHeadersFromResource(R.xml.pref_headers, target);
    }

    protected boolean isValidFragment(String fragmentName) {
        return PreferenceFragment.class.getName().equals(fragmentName)
                || GeneralPreferenceFragment.class.getName().equals(fragmentName)
                || DataSyncPreferenceFragment.class.getName().equals(fragmentName)
                || NotificationPreferenceFragment.class.getName().equals(fragmentName);
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class GeneralPreferenceFragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_general);
            setHasOptionsMenu(true);

            bindPreferenceSummaryToValue(findPreference("example_text"));
            bindPreferenceSummaryToValue(findPreference("example_list"));
        }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            int id = item.getItemId();
            if (id == android.R.id.home) {
                startActivity(new Intent(getActivity(), SettingsActivity.class));
                return true;
            }
            return super.onOptionsItemSelected(item);
        }
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class NotificationPreferenceFragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_notification);
            setHasOptionsMenu(true);
            bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
        }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            int id = item.getItemId();
            if (id == android.R.id.home) {
                startActivity(new Intent(getActivity(), SettingsActivity.class));
                return true;
            }
            return super.onOptionsItemSelected(item);
        }
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class DataSyncPreferenceFragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_data_sync);
            setHasOptionsMenu(true);
            bindPreferenceSummaryToValue(findPreference("sync_frequency"));
        }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            int id = item.getItemId();
            if (id == android.R.id.home) {
                startActivity(new Intent(getActivity(), SettingsActivity.class));
                return true;
            }
            return super.onOptionsItemSelected(item);
        }
    }
}

此代码存在的问题是，我的首选项实际上并不可用，因为我的MainActivity布局显示在设置上方。我已经搜索了很多，但我仍然无法找到满足我需求的答案。很多人说你可以使用Layouts和Stuff包装SettingsActivity，但据我所知，这不是我想要做的好练习编程。我知道这在Google的例子中非常接近，但我目前正在开发应用程序，所以这将被替换！ Thx提前！

编辑：用新问题替换代码。

2 个答案:

答案 0 :(得分：2)

是的，这是一个令人讨厌的人！我遇到了同样的问题 - Android Developer网站上使用的模式可以追溯到API 10的时代。下面的例子演示了如何使用现代的Activity / Fragment设计模式实现Preferences。

<强> pref_general.xml 

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

    <ListPreference
        android:icon="@drawable/ic_sort_black_48dp"
        android:title="@string/pref_sort_label"
        android:key="@string/pref_sort_key"
        android:defaultValue="@string/pref_sort_favorite"
        android:entryValues="@array/pref_sort_values"
        android:entries="@array/pref_sort_options" />

</PreferenceScreen>

<强> arrays.xml 

<resources>

    <string-array name="pref_sort_options">
        <item>@string/pref_sort_label_popular</item>
        <item>@string/pref_sort_label_rating</item>
        <item>@string/pref_sort_label_favorite</item>
    </string-array>

    <string-array name="pref_sort_values">
        <item>@string/pref_sort_popular</item>
        <item>@string/pref_sort_rating</item>
        <item>@string/pref_sort_favorite</item>
    </string-array>

</resources>

<强>的strings.xml 

<string name="pref_sort_label">Sort Order</string>
<string name="pref_sort_label_popular">Most Popular</string>
<string name="pref_sort_label_rating">Top Rated</string>
<string name="pref_sort_label_favorite">Favorites</string>
<string name="pref_sort_key" translatable="false">sort</string>
<string name="pref_sort_popular" translatable="false">popular</string>
<string name="pref_sort_rating" translatable="false">rating</string>
<string name="pref_sort_favorite" translatable="false">favorites</string>

<强> activity_settings.xml 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".SettingsActivity"
    tools:ignore="MergeRootFrame">

    <include
        android:id="@+id/app_bar"
        layout="@layout/app_bar" />

    <FrameLayout
        android:id="@+id/container_settings"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>

<强> app_bar.xml 

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/app_bar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    android:theme="@style/ToolbarTheme"
    android:elevation="4dp"
    app:titleMarginStart="32dp"
    app:popupTheme="@style/PopupTheme">

</android.support.v7.widget.Toolbar>

<强> SettingsActivity.java 

import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;

public class SettingsActivity extends AppCompatActivity {

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

        Toolbar toolbar = (Toolbar) findViewById(R.id.app_bar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        getFragmentManager().beginTransaction()
                .replace(R.id.container_settings, new SettingsFragment())
                .commit();
    }

    public static class SettingsFragment extends PreferenceFragment
            implements Preference.OnPreferenceChangeListener {

        public static String TAG = SettingsFragment.class.getSimpleName();

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

            addPreferencesFromResource(R.xml.pref_general);
            bindPreferenceSummaryToValue(findPreference(getString(R.string.pref_sort_key)));
        }

        private void bindPreferenceSummaryToValue(Preference preference) {
            preference.setOnPreferenceChangeListener(this);

            onPreferenceChange(preference,
                    PreferenceManager
                            .getDefaultSharedPreferences(preference.getContext())
                            .getString(preference.getKey(), ""));
        }

        @Override
        public boolean onPreferenceChange(Preference preference, Object newValue) {
            String stringValue = newValue.toString();

            if (preference instanceof ListPreference) {
                ListPreference listPreference = (ListPreference) preference;
                int prefIndex = listPreference.findIndexOfValue(stringValue);
                if (prefIndex >= 0) {
                    preference.setSummary(listPreference.getEntries()[prefIndex]);
                }
            }
            else {
                preference.setSummary(stringValue);
            }

            return true;
        }
    }
}

答案 1 :(得分：0)

我发现了我的失败！在阅读了apelosoczi的回答后，我发现在我的应用栏中，我的主要布局包含了一个包含。现在我宣布自己的app_bar之后就行了！但现在我必须在子集上添加填充:(当前不起作用![Failure] 1

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