Android Development _ Data storage technology _sharedpreferences class
Last Update:2015-05-23
Source: Internet
Author: User
<span id="Label3"></p><p><p>The Sharedpreferences class is used by developers to save and get key-value pairs for the base data type.</p></p><p><p>This class is primarily used for basic types, such as: booleans,ints,longs,strings. After the application finishes, the data is still Saved.</p></p><p><p>There are two ways to get sharedpreferences objects</p></p><p><p>1. getsharedpreferences (): If you need more than one shared file that uses a name to differentiate, you can use this method, whose first parameter is the name of the shared File.</p></p><p><p>For multiple sharedpreferences references obtained using the same name, they point to the same object</p></p><p><p>2, getpreferences (): You can use this method if the activity requires only one shared File. Because there is only one shared file, it does not need to provide a name.</p></p><p><p></p></p><p><p>Add values to the Sharedpreferences class as follows</p></p><p><p>1. Call the Sharedpreferences Class's edit () method to get the Sharedpreferences object</p></p><p><p>2, calls such as Putstring (), Putint () and other methods to increase the value of the corresponding type</p></p><p><p>3. Submit a new value using the Commit () method</p></p><p><p>When reading a value from the Sharedpreferences class, the getxxx () method defined in the class is used Primarily.</p></p><p><p></p></p><p><p>Here is a simple example to practice the use of the Sharedpreferences class</p></p><p><p></p></p><p><p>First look at the layout file:</p></p><pre><span style="color: #008080;"><span style="color: #008080;">1</span></span><?xml version=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">1.0</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>encoding=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Utf-8</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>?><span style="color: #008080;"><span style="color: #008080;">2</span></span><relativelayout xmlns:android=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">http://schemas.android.com/apk/res/android</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">3</span></span>Android:layout_width=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">match_parent</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">4</span></span>android:layout_height=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">match_parent</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">5</span></span>android:orientation=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Vertical</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>><span style="color: #008080;"><span style="color: #008080;">6</span></span> <span style="color: #008080;"><span style="color: #008080;">7</span></span><<span style="color: #000000;"><span style="color: #000000;">TextView</span></span><span style="color: #008080;"><span style="color: #008080;">8</span></span>Android:id=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">9</span></span>Android:layout_width=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">Ten</span></span>android:layout_height=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> one</span>android:layout_alignparentleft=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">true</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span>android:layout_alignparenttop=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">true</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>android:layout_marginleft=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">66DP</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>android:layout_margintop=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">64DP</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>android:text=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">User Name:</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>/><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span><<span style="color: #000000;"><span style="color: #000000;">TextView</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Android:id=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview2</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span>Android:layout_width=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>android:layout_height=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span>android:layout_alignleft=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span>android:layout_below=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> at</span>android:layout_margintop=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">32DP</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>android:text=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">password:</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>/><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span><<span style="color: #000000;"><span style="color: #000000;">EditText</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Android:id=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/edittext1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Android:layout_width=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> in</span>android:layout_height=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Android:layout_alignbaseline=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> to</span>Android:layout_alignbottom=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span>android:layout_torightof=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>android:ems=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Ten</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>/><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008080;"><span style="color: #008080;"></span> *</span><<span style="color: #000000;"><span style="color: #000000;">EditText</span></span><span style="color: #008080;"><span style="color: #008080;"></span> $</span>Android:id=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/edittext2</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">Panax Notoginseng</span></span>Android:layout_width=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>android:layout_height=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>Android:layout_alignbaseline=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview2</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span>Android:layout_alignbottom=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/textview2</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span>android:layout_alignleft=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/edittext1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>android:ems=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Ten</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span>Android:inputtype=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Textpassword</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> $</span><requestfocus/><span style="color: #008080;"><span style="color: #008080;"></span> $</span></EditText><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span><<span style="color: #000000;"><span style="color: #000000;">Button</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>Android:id=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/btn_load</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Android:layout_width=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">Wuyi</span></span>android:layout_height=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>android:layout_alignleft=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/edittext2</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>android:layout_below=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/edittext2</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> wu</span>android:layout_margintop=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">29DP</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>android:text=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Login</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>/><span style="color: #008080;"><span style="color: #008080;"></span> about</span> <span style="color: #008080;"><span style="color: #008080;"></span> $</span></RelativeLayout></pre><span class="cnblogs_code_collapse"><span class="cnblogs_code_collapse">View Code</span></span><p><p>A simple login Interface.</p></p><p><p>Look at the Java file again</p></p><pre><span style="color: #008080;"><span style="color: #008080;">1</span></span> <span style="color: #000000;">package <span style="color: #000000;">data;</span></span><span style="color: #008080;"><span style="color: #008080;">2</span></span> <span style="color: #008080;"><span style="color: #008080;">3</span></span> <span style="color: #000000;"><span style="color: #000000;">Import com.example.allcode.r;</span></span><span style="color: #008080;"><span style="color: #008080;">4</span></span> <span style="color: #008080;"><span style="color: #008080;">5</span></span> <span style="color: #000000;"><span style="color: #000000;">Import android.app.Activity;</span></span><span style="color: #008080;"><span style="color: #008080;">6</span></span> <span style="color: #000000;"><span style="color: #000000;">Import android.content.SharedPreferences;</span></span><span style="color: #008080;"><span style="color: #008080;">7</span></span> <span style="color: #000000;"><span style="color: #000000;">Import android.content.SharedPreferences.Editor;</span></span><span style="color: #008080;"><span style="color: #008080;">8</span></span> <span style="color: #000000;"><span style="color: #000000;">Import android.os.Bundle;</span></span><span style="color: #008080;"><span style="color: #008080;">9</span></span> <span style="color: #000000;"><span style="color: #000000;">Import android.view.View;</span></span><span style="color: #008080;"><span style="color: #008080;">Ten</span></span> <span style="color: #000000;"><span style="color: #000000;">Import android.view.View.OnClickListener;</span></span><span style="color: #008080;"><span style="color: #008080;"></span> one</span> <span style="color: #000000;"><span style="color: #000000;">Import android.widget.Button;</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span> <span style="color: #000000;"><span style="color: #000000;">Import android.widget.EditText;</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;">Import android.widget.Toast;</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">class</span></span><span style="color: #000000;"><span style="color: #000000;">Sharedpreference_use extends activity{</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Private</span></span><span style="color: #000000;"><span style="color: #000000;">EditText name;</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Private</span></span><span style="color: #000000;"><span style="color: #000000;">EditText password;</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Private</span></span><span style="color: #000000;"><span style="color: #000000;">Button load;</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;">@Override</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #0000ff;"><span style="color: #0000ff;">protected</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">void</span></span><span style="color: #000000;"><span style="color: #000000;">onCreate (Bundle Savedinstancestate) {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">TODO auto-generated Method Stub</span></span><span style="color: #008080;"><span style="color: #008080;"></span> at</span> <span style="color: #000000;"><span style="color: #000000;">super.oncreate (savedinstancestate);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;">Setcontentview (r.layout.data_sharedpreferences);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span>Name =<span style="color: #000000;"><span style="color: #000000;">(EditText) Findviewbyid (r.id.edittext1);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Password =<span style="color: #000000;"><span style="color: #000000;">(EditText) Findviewbyid (r.id.edittext2);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Load =<span style="color: #000000;"><span style="color: #000000;">(Button) Findviewbyid (r.id.btn_load);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> in</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Login button to save the user name and password to the Sharedpreferences object to store the data</span></span><span style="color: #008080;"><span style="color: #008080;"></span> to</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">display the Stored user name and password by toast</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span>Load.setonclicklistener (<span style="color: #0000ff;"><span style="color: #0000ff;">New</span></span><span style="color: #000000;"><span style="color: #000000;">Onclicklistener () {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;">@Override</span></span><span style="color: #008080;"><span style="color: #008080;"></span> *</span> <span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">void</span></span><span style="color: #000000;"><span style="color: #000000;">OnClick (View V) {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> $</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">TODO auto-generated Method Stub</span></span><span style="color: #008080;"><span style="color: #008080;">Panax Notoginseng</span></span>String str_name = name.gettext (). toString ();<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">get the data for the User name edit box</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>String Str_password = password.gettext (). toString ();<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">get the data in the Password box</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">get a private type of sharedpreferences</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span>Sharedpreferences sp = getsharedpreferences (<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Mrsoft</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">, mode_private);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span>Editor editor = Sp.edit ();<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Get Editor Object</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Editor.putstring (<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">username</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>, str_name);<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Add user name</span></span><span style="color: #008080;"><span style="color: #008080;"></span> $</span>Editor.putstring (<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Uesrpassword</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>, str_password);<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Add password</span></span><span style="color: #008080;"><span style="color: #008080;"></span> $</span>Editor.commit ();<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Submit Data</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">If you get sharedpreferences stored data in another activity, add the following line of code, and in the same activity you don't need</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">sharedpreferences sp = getsharedpreferences ("mrsoft", mode_private);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>String get_name = sp.getstring (<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">username</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>,<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">0</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">);</span></span><span style="color: #008080;"><span style="color: #008080;">Wuyi</span></span>String Get_password = sp.getstring (<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Uesrpassword</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>,<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">1</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">);</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span>Toast.maketext (sharedpreference_use.<span style="color: #0000ff;"><span style="color: #0000ff;"></span> this</span>,<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">the user name stored through sharedpreferences is:</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>+get_name+<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">the password is:</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>+get_password,<span style="color: #800080;"><span style="color: #800080;">1</span></span><span style="color: #000000;"><span style="color: #000000;">). Show ();</span></span><span style="color: #008080;"><span style="color: #008080;"></span> wu</span>Displays data for the obtained user name and password through toast<span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> about</span> <span style="color: #000000;"><span style="color: #000000;"> });</span></span><span style="color: #008080;"><span style="color: #008080;"></span> $</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span> <span style="color: #008080;"><span style="color: #008080;"></span> +</span>}</pre><p><p>：</p></p><p><p></p></p><p><p>Android Development _ Data storage technology _sharedpreferences class</p></p></span>
