This example demonstrates how do I add a button to PreferenceScreen in android.
Step 1 − Create a new project in Android Studio, go to File rArr; New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<LinearLayout xmlns:android="https://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <FrameLayout android:id="@+id/settings" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
Step 3 − Add the following code to src/MainActivity.java
import android.os.Bundle; import android.widget.Toast; import androidx.appcompat.app.ActionBar; import androidx.appcompat.app.AppCompatActivity; import androidx.preference.Preference; import androidx.preference.PreferenceFragmentCompat; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_activity); getSupportFragmentManager().beginTransaction().replace(R.id.settings, new SettingsFragment()).commit(); ActionBar actionBar = getSupportActionBar(); if (actionBar != null) { actionBar.setDisplayHomeAsUpEnabled(true); } } public static class SettingsFragment extends PreferenceFragmentCompat { @Override public void onCreatePreferences(Bundle savedInstanceState, String rootKey) { setPreferencesFromResource(R.xml.root_preferences, rootKey); Preference button = getPreferenceManager().findPreference("toastMsg"); if (button != null) { button.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() { @Override public boolean onPreferenceClick(Preference arg0) { Toast.makeText(getActivity(), "Preference button is clicked", Toast.LENGTH_SHORT).show(); return true; } }); } } } }
Step 4 − add the following code in the root_preferences.xml
<PreferenceScreen xmlns:app="https://schemas.android.com/apk/res-auto"> <PreferenceCategory app:title="@string/messages_header"> <EditTextPreference app:key="signature" app:title="@string/signature_title" app:useSimpleSummaryProvider="true" /> <ListPreference app:defaultValue="reply" app:entries="@array/reply_entries" app:entryValues="@array/reply_values" app:key="reply" app:title="@string/reply_title" app:useSimpleSummaryProvider="true" /> <Preference app:key="toastMsg" app:title="Show me a Toast" /> </PreferenceCategory> <PreferenceCategory app:title="@string/sync_header"> <SwitchPreferenceCompat app:key="sync" app:title="@string/sync_title" /> <SwitchPreferenceCompat app:dependency="sync" app:key="attachment" app:summaryOff="@string/attachment_summary_off" app:summaryOn="@string/attachment_summary_on" app:title="@string/attachment_title" /> </PreferenceCategory> </PreferenceScreen>
Step 5 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="https://schemas.android.com/apk/res/android" package="app.com.sample"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity" android:label="@string/title_activity_settings"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −