如何添加按钮到首选项屏幕

有没有办法在首选项屏幕底部添加一个按钮，让它们在滚动时正确工作？

95852 次浏览
小开

Actually, there is a solution. Here is a code, i hope, this will be useful for anyone. It looks like 3 options and 2 buttons in the bottom of the screen, independent of screen resolution (was targeted to 240 as lowest)

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;
}
}
小开
最佳答案

There is another solution for customizing the appearance of the preferences.

Design a normal XML layout with buttons or whatever you want to add to the standard preferences. Include a ListView in your layout and give it the ID @android:id/list.

Let's say we call the layout file res/layout/main.xml. It could look something like this:

<?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>

In your PreferenceActivity, add these two lines to your onCreate:

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

The ListView in your layout will then be replaced by the preferences defined the usual way in res/xml/preferences.xml.

小开

This example below will render a button at the bottom of the page (in case anybody is still interested).

In case of a LinearLayout you could also apply weights; this is needed because the Listview is set to *fill_parent*. I usually do this by adding *android:layout_weight* 's:

<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>

The explanation below isn't propbably 100% but it will help you understand...

+-- 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
+--

You could also say, because the Button has no weight; the button is rendered at 0dp height.

Now with the layout_weigths added it will lett the button render inview

+-- 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
| +--
+--
小开

This would be what the code looks like in the activity at the ronny's example. My intent was to put an menu in the bottom side of the screen.

/** 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
}
小开

I know this is a bit late, but I just found a solution i like better than Max's praised solution.

You can simply add a footer (or if you like the button to be on top, a header) to the PreferenceActivity's ListView like so:

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));
}
}

I hope this helps someone.

小开 
 <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>

I reference @Ronnie, use RelativeLayout and set a height for layout_height of listview, and then set the button's layout_alignParentBottom = "true", It can render a button at the bottom of PreferenceScreen; then use the way of @Max. it works for my needs.

小开

It is also possible to add Action buttons to the action bar for an android standard approach.

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>
小开

Custom view in Preference Activity this will help to add custom view in PreferenceActivity in Android.

Create main.xml, the only necessary view is a ListView, with id: 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>

Create 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");
}
}
小开

The following is a simple solution to add a clickable button to your preference screen. This is made easy because the preferences already reserve the space in the android:widgetLayout and the button can pass clicks with android:onClick.

First create a button.xml with the content

<?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>

Now in your preferences.xml, add the preference

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

Your PreferenceActivity now only has to contain a onButtonClick member

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");
}
}
小开

You just need to use PreferenceFragment inside general Activity and add the button into activity layout.

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);


}
}
}

SettingActivity.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

小开

preferences.xml:

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

SettingsFragment.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) {
...
}
}


}
小开

I found all of the above answers to be un-usable as any layouts I created to 'wrap' the PreferenceScreen container inside custom layouts (then adding a button below the ListView) didn't actually work.

They only overlaid the custom layout on top of the preferences list (floating), and clicking (e.g.) a new custom button would only invoke the preference underneath the button.

However, I found this solution which works a treat for adding a button below the preferences list container, when using PreferenceFragment.


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