1. 由於寫入資料到SD卡是有需要額外的權限,因此需在AndroidManifest.xml允許存取android.permission.WRITE_EXTERNAL_STORAGE這個權限。
2.AccessSDCardExample.java
01.package tw.nicky;02.import java.io.File;03.import java.io.FileWriter;04.import java.io.IOException;05.import android.app.Activity;06.import android.os.Bundle;07.import android.os.Environment;08. 09.public class AccessSDCardExample extends Activity {10. 11. @Override12. public void onCreate(Bundle savedInstanceState) {13. super.onCreate(savedInstanceState);14. setContentView(R.layout.main);15. 16. //判斷SD卡是否存在17. if(!Environment.getExternalStorageState().equals(Environment.MEDIA_REMOVED) ){18. try {19. //取得SD卡路徑20. File SDCardpath = Environment.getExternalStorageDirectory();21. File myDataPath = new File( SDCardpath.getAbsolutePath() + "/myData" );22. if( !myDataPath.exists() ) myDataPath.mkdirs();23. //將資料寫入到SD卡24. FileWriter myFile = new FileWriter( SDCardpath.getAbsolutePath() +"/myData/test.txt" );25. myFile.write("This is a test.");26. myFile.close();27. } catch (IOException e) {28. e.printStackTrace();29. }30. }31. }32.}
3. AndroidManifest.xml
01.<?xml version="1.0" encoding="utf-8"?>02.<manifest xmlns:android="http://schemas.android.com/apk/res/android"03. package="tw.nicky"04. android:versionCode="1"05. android:versionName="1.0">06. <application android:icon="@drawable/icon" android:label="@string/app_name">07. <activity android:name=".AccessSDCardExample"08. android:label="@string/app_name">09. <intent-filter>10. <action android:name="android.intent.action.MAIN" />11. <category android:name="android.intent.category.LAUNCHER" />12. </intent-filter>13. </activity>14. </application>15. <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />16.</manifest>
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