Internal storage to external storage

Java

Package Com.example.lenovo.lianxiyong;import Android.content.res.assetmanager;import Android.graphics.Bitmap; Import Android.graphics.bitmapfactory;import Android.os.environment;import Android.support.v7.app.appcompatactivity;import Android.os.bundle;import Android.view.view;import Android.widget.imageview;import Android.widget.toast;import Java.io.fileinputstream;import Java.io.fileoutputstream;import Java.io.inputstream;import Java.io.printstream;import java.util.Enumeration;    public class Shoujicunchuactivity extends appcompatactivity {ImageView iv1;        @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_shoujicunchu);    iv1= (ImageView) Findviewbyid (R.ID.IV1);            public void bt_1 (View v) {try {Assetmanager Assetmanager = Getassets ();            InputStream InputStream = Assetmanager.open ("nnn.jpg"); FileOutputStream FileOutputStream = OpenfileoUtput ("Ttt.jpg", mode_private);            Byte[]b=new byte[1024];            int i=0;            while ((I=inputstream.read (b)) >0) {fileoutputstream.write (b,0,i);            } fileoutputstream.close ();            Inputstream.close ();        Toast.maketext (Shoujicunchuactivity.this, "saved successfully", Toast.length_short). Show (); } catch (Exception e) {toast.maketext (Shoujicunchuactivity.this, "Save Failed", Toast.length_short). Sho        W (); }}//public void bt_2 (View v)//{//String Path=getfilesdir (). GetAbsolutePath () + "ttt.jpg";//Bitma P bm= bitmapfactory.decodefile (path),//} public void Bt_3 (View v) {if (Environment.getexternalstoragesta            Te (). Equals (environment.media_mounted)) {String path=getfilesdir (). GetAbsolutePath () + "ttt.jpg";            Bitmap bm= bitmapfactory.decodefile (path);                try {String str = bm.tostring (); String STR1 = Getexternalfilesdir ("Test"). Getcanonicalpath ();                FileOutputStream fos=new FileOutputStream ("str1");                PrintStream ps=new printstream (FOS);                Ps.print (str);                Ps.close ();            Fos.close (); } catch (Exception e) {toast.maketext (Shoujicunchuactivity.this, "Save Failed", Toast.lengt            H_short). Show ();         }} else {Toast.maketext (shoujicunchuactivity.this, "SD card not mounted", toast.length_short). Show (); }    }}

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Xml

<?XML version= "1.0" encoding= "Utf-8"?><LinearLayoutxmlns: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"Android:paddingbottom= "@dimen/activity_vertical_margin"Android:paddingleft= "@dimen/activity_horizontal_margin"Android:paddingright= "@dimen/activity_horizontal_margin"Android:paddingtop= "@dimen/activity_vertical_margin"Tools:context= "Com.example.lenovo.lianxiyong.ShoujicunchuActivity"android:orientation= "vertical">    <ImageViewAndroid:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:id= "@+id/iv1"android:src= "@drawable/nnn"/>    <ButtonAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "Save asset file to internal storage"Android:onclick= "Bt_1"/>    <ButtonAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:text= "Go to external memory"Android:onclick= "Bt_3"/></LinearLayout>

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Internal storage to external storage