java.lang.UnsatisfiedLinkError：未找到本地方法：創建

Question

你好，我正在編碼wav數據到android中的ogg vorbis。我爲Xiph.org的libogg-vorbis庫使用了一個簡單的JNI包裝器。當我創建的VorbisFileOutputStream的對象，然後程序拋出exeception java.lang.UnsatisfiedLinkError: create

VorbisFileOutputStream.java

public class VorbisFileOutputStream extends AudioOutputStream { 
    // The index into native memory where the ogg stream info is stored. 
    private final int oggStreamIdx; 
    private VorbisInfo info; 
    private static final int VORBIS_BLOCK_SIZE = 1024; 

    static { 
     System.loadLibrary("ogg"); 
     System.loadLibrary("vorbis"); 
     System.loadLibrary("vorbis-stream"); 
    } 

    public VorbisFileOutputStream (String fname, VorbisInfo s) throws IOException { 
     info = s; 
     oggStreamIdx = this.create(fname, s); 
    } 
    public VorbisFileOutputStream (String fname) throws IOException { 
     oggStreamIdx = this.create(fname, new VorbisInfo()); 
    } 

    @Override 
    public void close() throws IOException { 
     this.closeStreamIdx(this.oggStreamIdx); 
    } 

    /** 
    * Write PCM data to ogg. This assumes that you pass your streams in interleaved. 
    * @param buffer 
    * @param offset 
    * @param length 
    * @return 
    * @throws java.io.IOException 
    */ 
    @Override 
    public void write(final short [] buffer, int offset, int length) throws IOException { 
     this.writeStreamIdx(this.oggStreamIdx, buffer, offset, length); 
    } 

    private native int writeStreamIdx(int idx, short [] pcmdata, int offset, int size) throws IOException; 
    private native void closeStreamIdx(int idx) throws IOException; 
    private native int create(String path, VorbisInfo s) throws IOException; 
    @Override 
    public int getSampleRate() { 
     return info.sampleRate; 
    } 
} 

MainActivity.java

try { 
    vorbisFileOutputStream = new VorbisFileOutputStream(
      "/sdcard/demo.ogg"); 
} catch (IOException e) { 
    e.printStackTrace(); 
} 
while (isRecording) { 
    // gets the voice output from microphone to byte format 
    recorder.read(sData, 0, bufferSize/2); 
    System.out.println("Short writing to file" + sData.toString()); 
    try { 
     // writes the data to file from buffer stores the voice buffer 
     dataOutputStream.write(short2byte(sData)); 
     vorbisFileOutputStream.write(short2byte(sData)); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
} 

錯誤日誌：

04-15 16:04:00.515: E/AndroidRuntime(2299): FATAL EXCEPTION: AudioRecorder Thread 
04-15 16:04:00.515: E/AndroidRuntime(2299): java.lang.UnsatisfiedLinkError: create 
04-15 16:04:00.515: E/AndroidRuntime(2299):  at com.example.app.VorbisFileOutputStream.create(Native Method) 
04-15 16:04:00.515: E/AndroidRuntime(2299):  at com.example.app.VorbisFileOutputStream.<init>(VorbisFileOutputStream.java:33) 
04-15 16:04:00.515: E/AndroidRuntime(2299):  at com.example.app.MainActivity.writeAudioDataToFile(MainActivity.java:111) 
04-15 16:04:00.515: E/AndroidRuntime(2299):  at com.example.app.MainActivity.access$0(MainActivity.java:93) 
04-15 16:04:00.515: E/AndroidRuntime(2299):  at com.example.app.MainActivity$1.run(MainActivity.java:48) 
04-15 16:04:00.515: E/AndroidRuntime(2299):  at java.lang.Thread.run(Thread.java:1019) 

任何想法？

Answer 1

首先包括在類的.so文件，通過使用此代碼

static 
{ 
     System.loadLibrary("library_name"); // Left the 'lib' prefix from .so file 
}