1. package com.example.sdcardwriter;
2. import java.io.File;
3. import java.io.FileInputStream;
4. import java.io.FileNotFoundException;
5. import java.io.FileOutputStream;
6. import java.io.IOException;
7. import java.io.InputStreamReader;
8. import java.io.OutputStreamWriter;
9. import android.app.Activity;
10. import android.os.Bundle;
11. import android.os.Environment;
12. import android.view.View;
13. import android.widget.Button;
14. import android.widget.EditText;
15. import android.widget.TextView;
16. import android.widget.Toast;
17. public class SavedatasdcardActivity extends Activity {
18. /** Called when the activity is first created. */
19. Button save,load;
20. EditText message;
21. TextView t1;
22. String Message1;
23. @Override
24. protected void onCreate(Bundle savedInstanceState) {
25. super.onCreate(savedInstanceState);
26. setContentView(R.layout.main);
27. save=(Button) findViewById(R.id.button1);
28. load=(Button) findViewById(R.id.button2);
29. message=(EditText) findViewById(R.id.editText1);
30. t1=(TextView) findViewById(R.id.textView1);
31. save.setOnClickListener(new View.OnClickListener(){
32. public void onClick(View v){
33. //Get message from user store in message1 variable
34. Message1 =message.getText().toString();
35. try{
36. //Create a new folder called MyDirectory in SDCard
37. File sdcard=Environment.getExternalStorageDirectory();
38. File directory=new File(sdcard.getAbsolutePath()+"/MyDirectory");
39. directory.mkdirs();
40. //Create a new file name textfile.txt inside MyDirectory
41. File file=new File(directory,"textfile.txt");
42. //Create File Output stream to read the file
43. FileOutputStream fou=new FileOutputStream(file);
44. OutputStreamWriter osw=new OutputStreamWriter(fou);
45. try{
46. //write a user data to file
47. osw.append(Message1);
48. osw.flush();
49. osw.close();
50. Toast.makeText(getBaseContext(),"DataSaved",Toast.LENGTH_LONG).show();
51. }catch(IOException e){
52. e.printStackTrace();
53. }
54. }catch (FileNotFoundException e){
55. e.printStackTrace();
56. }
57. }
58. });
59. load.setOnClickListener(new View.OnClickListener(){
60. public void onClick(View v){
61. try{
62. File sdcard=Environment.getExternalStorageDirectory();
63. File directory=new File(sdcard.getAbsolutePath()+"/MyDirectory");
64. File file=new File(directory,"textfile.txt");
65. FileInputStream fis=new FileInputStream(file);
66. InputStreamReader isr=new InputStreamReader(fis);
67. char[] data=new char[100];
68. String final_data="";
69. int size;
70. try{
71. while((size=isr.read(data))>0)
72. {
73. //read a data from file
74. String read_data=String.copyValueOf(data,0,size);
75. final_data+=read_data;
76. data=new char[100];
77. }
78. //display the data in output
79. Toast.makeText(getBaseContext(),"Message:"+final_data,Toast.LENGTH_LONG).show();
80. }catch(IOException e){
81. e.printStackTrace();
82. }
83. }catch (FileNotFoundException e){
84. e.printStackTrace();
85. }
86. }
87. });    }  }
88.