为什么我的代码中的指纹不起作用？

Question

我正在创建一个应用程序来识别两个wave文件的声音，为此，我发现"Musicg“库就是用于这个目的的。因此，我只需在我的项目中编写一个简单的代码，看看声音是否类似，但是当我运行该项目时，它会崩溃，然后我发现当程序出现fingerprintSimilarity =wave.getFingerprintSimilarity(Wave1)时，它会崩溃，那么有人能告诉我我在哪里出错了吗？

这是我的简单代码

FingerprintSimilarity fingerprintSimilarity;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        Wave wave = new Wave("sampledata/cock_a_1.wav");
        Wave wave1 = new Wave("sampledata/cock_a_1.wav");
        
        fingerprintSimilarity = wave.getFingerprintSimilarity(wave1);


       float score = fingerprintSimilarity.getScore();
       float similarity = fingerprintSimilarity.getSimilarity();
       Log.d("hi","score :" +score+ "\n Similarity :" + similarity);


    }

它给了我这些错误：

03-24 23:42:41.984 2817-2817/com.example.指纹E/AndroidRuntime:致命异常:主进程: com.example.fingerprint，PID: 2817 java.lang.RuntimeException:无法启动活动android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) java.lang.NullPointerException:尝试在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)上调用空对象引用上的虚拟方法'int com.musicg.wave.WaveHeader.getSampleRate()‘android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(原生方法) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)，由: java.lang.NullPointerException:尝试调用虚拟方法'int com.musicg.wave.WaveHeader引起。空对象引用( com.musicg.fingerprint.FingerprintManager.extractFingerprint(FingerprintManager.java:69) at com.musicg.wave.Wave.getFingerprint(Wave.java:329) at com.musicg.wave.Wave.getFingerprintSimilarity(Wave.java:335) at com.example.fingerprint.MainActivity.onCreate(MainActivity.java:31) at android.app.Activity.performCreate(Activity.java:6237) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java：)2369)在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)在android.app.ActivityThread.-wrap11(ActivityThread.java)在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)在android.os.Handler.dispatchMessage(Handler.java:102)在android.os.Looper.loop(Looper.java:148)在android.app.ActivityThread.main(ActivityThread.java:5417)在java.lang.reflect.Method.invoke(本地方法)在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Answer 1

Wave()方法接受"Inputstream“作为参数，而不是文件的路径。将文件的路径转换为Inpustream类型，然后将其放入wave参数中。