Android shared inclination is utilized to store and recover primitive data. In android, string, whole number, long, number and so on are considered as primitive information sort.
Android Shared inclinations are utilized to store information in key and esteem match with the goal that we can recover the quality on the premise of key.
It is broadly used to get data from client, for example, in settings.
activity_main.xml
<RelativeLayout 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" tools:context=".MainActivity" > <TextView android:id="@+id/txtPrefs" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:text="Data:" /> <Button android:id="@+id/storeinformation" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/showinformation" android:layout_centerHorizontal="true" android:layout_marginTop="18dp" android:text="Store Information" /> <Button android:id="@+id/showinformation" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="17dp" android:text="Show Information" /> </RelativeLayout>
array.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <string-array name="listOptions"> <item>English</item> <item>Hindi</item> <item>Other</item> </string-array> <string-array name="listValues"> <item>English Language</item> <item>Hindi Language</item> <item>Other Language</item> </string-array> </resources>
prefs.xml
<?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" > <PreferenceCategory android:summary="Username and password information" android:title="Login information" > <EditTextPreference android:key="username" android:summary="Please enter your login username" android:title="Username" /> <EditTextPreference android:key="password" android:summary="Enter your password" android:title="Password" /> </PreferenceCategory> <PreferenceCategory android:summary="Username and password information" android:title="Settings" > <CheckBoxPreference android:key="checkBox" android:summary="On/Off" android:title="Keep me logged in" /> <ListPreference android:entries="@array/listOptions" android:entryValues="@array/listValues" android:key="listpref" android:summary="List preference example" android:title="List preference" /> </PreferenceCategory> </PreferenceScreen>
File: PreferenceDemoActivity.java
package com.codebind.preferences; import android.os.Bundle; import android.preference.PreferenceManager; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.TextView; public class PreferenceDemoActivity extends Activity { TextView textView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button storeinformation = (Button) findViewById(R.id.storeinformation); Button showinformation = (Button) findViewById(R.id.showinformation); textView = (TextView) findViewById(R.id.txtPrefs); View.OnClickListener listener = new View.OnClickListener() { @Override public void onClick(View v) { switch (v.getId()) { case R.id.storeinformation: Intent intent = new Intent(PreferenceDemoActivity.this,PrefsActivity.class); startActivity(intent); break; case R.id.showinformation: displaySharedPreferences(); break; default: break; } } }; storeinformation.setOnClickListener(listener); showinformation.setOnClickListener(listener); } private void displaySharedPreferences() { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(PreferenceDemoActivity.this); String username = prefs.getString("username", "Default NickName"); String passw = prefs.getString("password", "Default Password"); boolean checkBox = prefs.getBoolean("checkBox", false); String listPrefs = prefs.getString("listpref", "Default list prefs"); StringBuilder builder = new StringBuilder(); builder.append("Username: " + username + "\n"); builder.append("Password: " + passw + "\n"); builder.append("Keep me logged in: " + String.valueOf(checkBox) + "\n"); builder.append("List preference: " + listPrefs); textView.setText(builder.toString()); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } }
Android Books To Learn Mobile Apps Programming
- Android Programming: The Big Nerd Ranch Guide
- Android Design Patterns: Interaction Design Solutions for Developers
- Android Application Development Cookbook – Second Edition
- Android User Interface Design: Turning Ideas and Sketches into Beautifully Designed Apps (Usability)
- Android Recipes: A Problem-Solution Approach for Android 5.0
- Hello, Android: Introducing Google’s Mobile Development Platform (Pragmatic Programmers)
- Beginning Android Games
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