如何向PreferenceScreen添加按钮

问题描述 投票:106回答:12

有没有办法在首选项屏幕的底部添加一个按钮,并在滚动时使它们正常工作?

android android-preferences
12个回答
249
投票

还有另一种自定义首选项外观的解决方案。

使用按钮或任何要添加到标准首选项的内容设计常规XML布局。在你的布局中包含一个ListView并给它ID @android:id/list

假设我们称之为布局文件res/layout/main.xml。它可能看起来像这样:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">
    <Button android:text="This is a button on top of all preferences."
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    <ListView android:id="@android:id/list"
              android:layout_width="match_parent"
              android:layout_height="wrap_content" />
</LinearLayout>

在你的PreferenceActivity中,将这两行添加到你的onCreate

addPreferencesFromResource(R.xml.preferences);
setContentView(R.layout.main);

然后,布局中的ListView将被res/xml/preferences.xml中常用方式定义的首选项所取代。


0
投票

以下是将可点击按钮添加到首选项屏幕的简单解决方案。这很简单,因为首选项已经保留了android:widgetLayout中的空格,按钮可以通过android:onClick传递点击。

首先使用内容创建一个button.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
    android:text="BUTTON"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/button"
    android:onClick="onButtonClick"/>
</LinearLayout>

现在在您的preferences.xml中,添加首选项

<Preference
    android:key="button"
    android:title="Title"
    android:summary="Summary"
    android:widgetLayout="@layout/button" />

您的PreferenceActivity现在只需包含onButtonClick成员

public class MainActivity extends PreferenceActivity {

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

    addPreferencesFromResource(R.xml.main_preferences);


}

public void onButtonClick(View v) {
    Log.d("Button", "Yeah, button was clicked");
}
}

0
投票

的preferences.xml:

    <Preference
        android:key="clearAllData"
        android:title="@string/settings_clear_all_data">
    </Preference>

settings fragment.Java:

public class SettingsFragment extends PreferenceFragment {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.settings);

        Preference clearAllData = (Preference) findPreference("clearAllData");

        // setup buttons
        final Context context = getActivity();
        clearAllData.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {

            @Override
            public boolean onPreferenceClick(Preference preference) {
                ...
            }
    }

}

0
投票

我发现所有上述答案都无法使用,因为我在自定义布局中“包装”PreferenceScreen容器时创建的任何布局(然后在ListView下面添加一个按钮)实际上并不起作用。

它们仅覆盖首选项列表(浮动)顶部的自定义布局,单击(例如)新的自定义按钮只会调用按钮下方的首选项。

但是,当我使用this solution时,我发现PreferenceFragment可以在首选项列表容器下面添加一个按钮。


56
投票

我知道这有点晚了,但我刚刚找到了一个解决方案,我比Max的称赞解决方案更好。

你可以简单地将一个页脚(或者你喜欢按钮放在顶部,一个标题)添加到PreferenceActivity ListView,如下所示:

public class MyActivity extends PreferenceActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);
        ListView v = getListView();
        v.addFooterView(new Button(this));
    }
}

我希望这可以帮助别人。


11
投票

下面的示例将在页面底部呈现一个按钮(如果有人仍然感兴趣)。

如果是LinearLayout,您也可以应用权重;这是必需的,因为Listview设置为* fill_parent *。我通常通过添加* android:layout_weight *来做到这一点:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:orientation="vertical">
    <ListView android:id="@android:id/list"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent" android:layout_weight="10"/>
    <Button android:text="This is a button on top of all preferences."
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_weight="1"/>
</LinearLayout>

下面的解释可能不是100%,但它会帮助你理解......

+-- View Port (linear layout)
| +-- List View (this is where the preferences will go)
| |
| |
| +--
+--
  +--
  | Button (which was pushed out of view by the fillparent of ListView
  +--

你也可以说,因为按钮没有重量;按钮呈现在0dp高度。

现在添加了layout_weight,它将让按钮在视图中呈现

+-- View Port (linear layout)
| +-- List View (this is where the preferences will go)
| |
| |
| +--
| +--
| | Button (which was pushed out of view by the fillparent of ListView
| +--
+--

7
投票

实际上,有一个解决方案。这是一个代码,我希望,这对任何人都有用。它看起来像屏幕底部的3个选项和2个按钮,与屏幕分辨率无关(最低为240)

package com.myapplication.gui;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceScreen;
import android.view.Display;
import android.view.Gravity;
import android.view.WindowManager;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ScrollView;
import com.myproject.general.HeightListView;

import com.myapplication.R;

public class FilterActivity extends PreferenceActivity {

    private LinearLayout rootView; 
    private LinearLayout buttonView; 
    private Button buttonDone;
    private Button buttonRevert;
    private ListView preferenceView; 
    private LinearLayout gradientView;
    private ScrollView scrollRoot;

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

        Display display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay(); 
        int height = display.getHeight();
        int width = height > 240 ? display.getWidth() : display.getWidth() - 4;

        scrollRoot = new ScrollView(this);
        scrollRoot.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

        rootView = new LinearLayout(this); 
        rootView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); 
        rootView.setOrientation(LinearLayout.VERTICAL);

        buttonView = new LinearLayout(this); 
        buttonView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
        buttonView.setOrientation(LinearLayout.HORIZONTAL);
        buttonView.setGravity(Gravity.BOTTOM);

        gradientView = new LinearLayout(this);
        gradientView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
        gradientView.setOrientation(LinearLayout.HORIZONTAL);
        gradientView.setBackgroundResource(R.drawable.gradient);
        gradientView.setPadding(0, 5, 0, 0);
        gradientView.setBackgroundResource(R.drawable.gradient);

        buttonDone = new Button(this); 
        buttonDone.setText(R.string.filterButton_Done); 
        buttonDone.setLayoutParams(new LayoutParams(width/2, LayoutParams.WRAP_CONTENT));
        gradientView.addView(buttonDone);

        buttonRevert = new Button(this); 
        buttonRevert.setText(R.string.filterButton_Revert);
        buttonRevert.setLayoutParams(new LayoutParams(width/2, LayoutParams.WRAP_CONTENT));
        gradientView.addView(buttonRevert);

        buttonView.addView(gradientView);

        preferenceView = new HeightListView(this); 
        preferenceView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); 
        preferenceView.setId(android.R.id.list); 

        PreferenceScreen screen = createPreferenceHierarchy(); 
        screen.bind(preferenceView); 
        preferenceView.setAdapter(screen.getRootAdapter()); 
        rootView.addView(preferenceView);
        rootView.addView(buttonView);

        if (height > 240) {
            this.setContentView(rootView);
        }
        else {
            scrollRoot.addView(rootView);
            this.setContentView(scrollRoot);
        }

        setPreferenceScreen(screen); 
    } 

    private PreferenceScreen createPreferenceHierarchy() {        
        PreferenceScreen root = getPreferenceManager().createPreferenceScreen(this);

        PreferenceScreen pref1 = getPreferenceManager().createPreferenceScreen(this);
        pref1.setKey("pref1");
        pref1.setTitle("Title");
        pref1.setSummary("Summary");
        root.addPreference(pref1); 

        PreferenceScreen pref2 = getPreferenceManager().createPreferenceScreen(this);
        pref2.setKey("pref2");
        pref2.setTitle("Title");
        pref2.setSummary("Summary");
        root.addPreference(pref2); 

        PreferenceScreen pref3 = getPreferenceManager().createPreferenceScreen(this);
        pref3.setKey("pref3");
        pref3.setTitle("Title");
        pref3.setSummary("Summary");
        root.addPreference(pref3); 

        return root; 
    } 
}

2
投票

您只需在常规Activity中使用PreferenceFragment并将按钮添加到活动布局中。

public class SettingActivity extends Activity {

    UserProfileViewModel userProfileViewModel = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_setting);
        getFragmentManager().beginTransaction()
                .replace(R.id.content, new SettingsFragment())
                .commit();

    }

    private class SettingsFragment extends PreferenceFragment {
        public SettingsFragment() {
        }

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

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

        }
    }
}

setting activity.Java

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

    <FrameLayout
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/buttonSave"/>

    <Button
        android:id="@+id/buttonSave"
        android:text="Save"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
</RelativeLayout>

activity_setting

enter image description here


1
投票

这将是代码在ronny示例中的活动中的样子。我的意图是在屏幕的底部放置一个菜单。

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.prefs);
    addPreferencesFromResource(R.xml.prefs);

   /* LayoutInflater CX = getLayoutInflater();
    CX.inflate(R.layout.main,null);*/
    // TODO Auto-generated method stub
}

1
投票
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="@dimens/listview_height" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="This is a button on top of all preferences." />
</RelativeLayout>

我引用@Ronnie,使用RelativeLayout并为listview的layout_height设置高度,然后设置按钮的layout_alignParentBottom =“true”,它可以在PreferenceScreen的底部渲染一个按钮;然后使用@Max的方式。它适合我的需要。


1
投票

也可以将动作按钮添加到操作栏以获得android标准方法。

public class PrefActivity extends PreferenceActivity{

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

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate the menu items for use in the action bar
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.preference_header_menu, menu);
      return super.onCreateOptionsMenu(menu);
  }

}


    <?xml version="1.0" encoding="utf-8"?>
       <menu xmlns:android="http://schemas.android.com/apk/res/android">
       <item android:id="@+id/action_add"
           android:icon="@drawable/ic_menu_add_dark"
           android:title="@string/menu_action_add_title"
           android:showAsAction="always"  />

   </menu>

0
投票

Custom view in Preference Activity这将有助于在Android中的PreferenceActivity中添加自定义视图。

创建main.xml,唯一必要的视图是ListView,id为:android:id="@android:id/list"

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:weightSum="1">
        <ListView 
            android:id="@android:id/list" 
            android:layout_weight="1"
            android:layout_width="fill_parent"
                android:layout_height="0dp">
        </ListView>
        <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

创建CustomPreferenceActivity.java

public class CustomPreferenceActivity extends PreferenceActivity {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);
                addPreferencesFromResource(R.xml.settings);

                //setup any other views that you have
                TextView textView = (TextView) findViewById(R.id.textView);
textView.setText("View Added");
        }
}
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