如何將原始文件複製到SD卡

我有問題，同時試圖將音頻文件從原始文件夾複製到SD卡，我已經成功創建了SD卡中的文件夾，但無法複製歌曲...如何將原始文件複製到SD卡

我使用本教程：http://www.androidhive.info/2012/03/android-building-audio-player-tutorial/

String path = Environment.getExternalStorageDirectory() + "/PriyankaChopra" ; 
    File dir = new File(path); 
    try{ 
     if(dir.mkdir()) { 
      final int[] mSongs = new int[] { R.raw.exotic, R.raw.pyaar, R.raw.tinka }; 
      for (int i = 0; i < mSongs.length; i++) { 
       try { 
        String str_song_name= i +".mp3"; 
        CopyRAWtoSDCard(mSongs[i], "/sdcard/PriyankaChopra/"+str_song_name); 
       } catch (IOException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
      } 
     } else { 
      System.out.println("Error, while Copying songs to SD Card!"); 

     } 
    }catch(Exception e){ 
     e.printStackTrace(); 
    } 

    } 

    private void CopyRAWtoSDCard(int id, String path) throws IOException { 
     InputStream in = getResources().openRawResource(id); 
     FileOutputStream out = new FileOutputStream(path); 
     byte[] buff = new byte[1024]; 
     int read = 0; 

     try { 
      while ((read = in.read(buff)) > 0) { 
       out.write(buff, 0, read); 
      } 
     } finally { 
      in.close(); 
      out.close(); 
    }

日誌說：

10-19 04:57:43.729: D/dalvikvm(997): GC_FOR_ALLOC freed 77K, 7% free 2942K/3136K, paused 64ms, total 67ms 
10-19 04:57:44.019: I/System.out(997): Error, while Copying songs to SD Card! 
10-19 04:57:44.328: D/gralloc_goldfish(997): Emulator without GPU emulation detected. 
10-19 05:39:32.988: D/dalvikvm(4086): GC_FOR_ALLOC freed 53K, 6% free 2964K/3136K, paused 45ms, total 47ms 
10-19 05:39:33.318: I/System.out(4086): Error, while Copying songs to SD Card! 
10-19 05:39:34.209: D/gralloc_goldfish(4086): Emulator without GPU emulation detected. 
10-19 06:20:10.529: D/dalvikvm(8485): GC_FOR_ALLOC freed 46K, 6% free 2964K/3132K, paused 37ms, total 39ms 
10-19 06:20:11.369: D/AndroidRuntime(8485): Shutting down VM 
10-19 06:20:11.369: W/dalvikvm(8485): threadid=1: thread exiting with uncaught exception (group=0x41465700) 
10-19 06:20:11.500: E/AndroidRuntime(8485): FATAL EXCEPTION: main 
10-19 06:20:11.500: E/AndroidRuntime(8485): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidhive.musicplayer/com.androidhive.musicplayer.Music}: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.os.Looper.loop(Looper.java:137) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.app.ActivityThread.main(ActivityThread.java:5103) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at java.lang.reflect.Method.invoke(Method.java:525) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at dalvik.system.NativeStart.main(Native Method) 
10-19 06:20:11.500: E/AndroidRuntime(8485): Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at java.util.ArrayList.get(ArrayList.java:308) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at com.androidhive.musicplayer.Music.playSong(Music.java:282) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at com.androidhive.musicplayer.Music.onCreate(Music.java:81) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.app.Activity.performCreate(Activity.java:5133) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 
10-19 06:20:11.500: E/AndroidRuntime(8485):  ... 11 more 
10-19 06:22:14.589: D/dalvikvm(8922): GC_FOR_ALLOC freed 50K, 6% free 2964K/3136K, paused 33ms, total 35ms 
10-19 06:22:14.809: D/AndroidRuntime(8922): Shutting down VM 
10-19 06:22:14.809: W/dalvikvm(8922): threadid=1: thread exiting with uncaught exception (group=0x41465700) 
10-19 06:22:14.870: E/AndroidRuntime(8922): FATAL EXCEPTION: main 
10-19 06:22:14.870: E/AndroidRuntime(8922): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidhive.musicplayer/com.androidhive.musicplayer.Music}: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.app.ActivityThread.access$600(ActivityThread.java:141) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.os.Looper.loop(Looper.java:137) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.app.ActivityThread.main(ActivityThread.java:5103) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at java.lang.reflect.Method.invoke(Method.java:525) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at dalvik.system.NativeStart.main(Native Method) 
10-19 06:22:14.870: E/AndroidRuntime(8922): Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at java.util.ArrayList.get(ArrayList.java:308) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at com.androidhive.musicplayer.Music.playSong(Music.java:281) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at com.androidhive.musicplayer.Music.onCreate(Music.java:80) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.app.Activity.performCreate(Activity.java:5133) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 
10-19 06:22:14.870: E/AndroidRuntime(8922):  ... 11 more

來源

2013-10-19 Sonali

什麼例外，你得到？檢查堆棧跟蹤。 –

@Ajmal我更新日誌請現在檢查 – Sonali

與我替換你的代碼。

它在這裏工作很完美。

只添加此權限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Java代碼：

import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import android.app.Activity; 
import android.os.Bundle; 
import android.os.Environment; 

public class Sample extends Activity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    final int[] mSongs = new int[] { R.raw.background, R.raw.background1, R.raw.background2 }; 
    for (int i = 0; i < mSongs.length; i++) { 
     try { 
      String path = Environment.getExternalStorageDirectory() + "/PriyankaChopra"; 
      File dir = new File(path); 
      if (dir.mkdirs() || dir.isDirectory()) { 
       String str_song_name = i + ".mp3"; 
       CopyRAWtoSDCard(mSongs[i], path + File.separator + str_song_name); 
      } 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

} 

private void CopyRAWtoSDCard(int id, String path) throws IOException { 
    InputStream in = getResources().openRawResource(id); 
    FileOutputStream out = new FileOutputStream(path); 
    byte[] buff = new byte[1024]; 
    int read = 0; 
    try { 
     while ((read = in.read(buff)) > 0) { 
      out.write(buff, 0, read); 
     } 
    } finally { 
     in.close(); 
     out.close(); 
    } 
} 

}

來源

2013-10-19 10:51:09 SilentKiller

@Sonali你歡迎，。我的快樂..：D – SilentKiller

工作就像一個魅力！ – berserk

你忘記添加歌曲文件名和分機ension與路徑上的SD卡：

CopyRAWtoSDCard(mSongs[i], "/sdcard/PriyankaChopra/"); <<<<<

做得一樣：

String str_song_name="song_name_"+i+".mp3"; 
CopyRAWtoSDCard(mSongs[i], "/sdcard/PriyankaChopra/"+str_song_name);

，還可以使用Environment.getExternalStorageDirectory()用於獲取SD卡路徑，而不是靜態路徑

來源

2013-10-19 08:47:26

沒有完成，我在哪裏失蹤 – Sonali

@Sonali：顯示更新的代碼，以獲得更多幫助 –

@Sonali：問題是在playSong方法裏面，因爲某個地方你傳遞錯誤索引到ArrayList –

如何將原始文件複製到SD卡

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