Detailed complete example of Android file storage

Mainactivity as follows:

Package Cc.cv;import Java.io.bufferedreader;import Java.io.bufferedwriter;import java.io.fileinputstream;import Java.io.fileoutputstream;import Java.io.inputstreamreader;import Java.io.outputstreamwriter;import Android.os.bundle;import Android.app.activity;import Android.content.context;import Android.view.View;import Android.view.view.onclicklistener;import android.widget.button;/** * Demo Description: * File Store Detailed example * * Available with context's openfileoutput ( ) method to store the data in a file. * The default storage path is/data/data/<packagename>/files/* You can use the context's Openfileinput () method to read the data from a file * * The storage method commonly used in Android: * sharedpreferences, database, SD card, file storage. * For the last way, usually not much, now write an example * collation and review.    * Note: * File storage is not required permissions and file storage on the SD card is not the same */public class Mainactivity extends Activity {private Button Msavebutton;    Private Button Mgetbutton;    Private Context Mcontext; Private String mfilename; @Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate ( Savedinstancestate); Setcontentview (R.layout.main); init ();} private void Init () {McontExt=this;mfilename= "TestData"; msavebutton= (Button) Findviewbyid (R.id.savebutton); Msavebutton.setonclicklistener (New Clicklistenerimpl ()); mgetbutton= (Button) Findviewbyid (R.id.getbutton); Mgetbutton.setonclicklistener (new Clicklistenerimpl ());} Private class Clicklistenerimpl implements onclicklistener{@Overridepublic void OnClick (view view) {switch (View.getid ( ) {case R.id.savebutton:savedatatofile (mcontext,mfilename); Break;case R.id.getbutton:getdatafromfile (MContext, Mfilename); break;default:break;}}} /** * Save data to file */private void Savedatatofile (Context context,string fileName) {String data= "Hello,all"; FileOutputStream Fileoutputstream=null;outputstreamwriter Outputstreamwriter=null; BufferedWriter bufferedwriter=null;try {fileoutputstream=context.openfileoutput (fileName, Context.MODE_PRIVATE); o Utputstreamwriter=new OutputStreamWriter (fileoutputstream); bufferedwriter=new BufferedWriter (OutputStreamWriter) ; bufferedwriter.write (data);} catch (Exception e) {e.printstacktrace ();} Finally{try {if (bufferedwriter!=null) {bufferedwriter.close ();}} catch (Exception e) {e.printstacktrace ()}}} /** * Read data from file */private void Getdatafromfile (Context context,string fileName) {FileInputStream fileinputstream=null ; InputStreamReader Inputstreamreader=null; BufferedReader Bufferedreader=null; StringBuilder Stringbuilder=null; String line=null;try {stringbuilder=new stringBuilder (); Fileinputstream=context.openfileinput (FileName); Inputstreamreader=new InputStreamReader (FileInputStream); bufferedreader=new BufferedReader (InputStreamReader); while ((Line=bufferedreader.readline ())!=null) {stringbuilder.append (line);} SYSTEM.OUT.PRINTLN ("--->" +stringbuilder.tostring ());} catch (Exception e) {e.printstacktrace ();} Finally{try {if (bufferedreader!=null) {bufferedreader.close ();}} catch (Exception e) {e.printstacktrace ();}}}}

Main.xml as follows:

<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 "    >    <button        android:id= "@+id/savebutton"        android:layout_width= "Wrap_content"        android: layout_height= "Wrap_content"        android:text= "save data to File"        android:layout_centerhorizontal= "true"        android:layout_margintop= "100DP"/>             <button        android:id= "@+id/getbutton"        android:layout_ Width= "Wrap_content"        android:layout_height= "wrap_content"        android:text= "get data from File"        android: Layout_centerhorizontal= "true"        android:layout_margintop= "260DP"/></relativelayout>

Android File Store detailed complete example