[英]why fingerprintsimilarty in my code does not work?
我正在创建一个应用程序来识别两个波形文件的声音,为此我发现“Musicg”库用于此目的。 所以我只是在我的项目中写了一个简单的代码来查看声音是否相似,但是当我运行项目时它崩溃了,然后我发现当程序来到 fingerprintSimilarity = wave.getFingerprintSimilarity(wave1); 然后它崩溃了,谁能告诉我我哪里做错了?
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.fingerprint E/AndroidRuntime:致命异常:主进程:com.example.fingerprint,PID:2817 java.lang.RuntimeException:无法启动活动 ComponentInfo {com。 example.fingerprint/com.example.fingerprint.MainActivity}: java.lang.NullPointerException: 尝试在 null 882829954028848 上调用虚拟方法 'int com.musicg.wave.WaveHeader.getSampleRate()' performLaunchActivity(ActivityThread.java:2416) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread. java:1344) 在 android.os.Handler.dispatchMessage(Handler.java:102) 在 android.os.Looper.loop(Looper.java:148) 在 882946184094188.os.Looper.loop(Looper.java:148) 在 8829446945888(Handler.java:148) .java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit .java:616) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int com.musicg.wave.WaveHeader.getSampleRate()' on a null object reference at 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) 在 android.app.Activity.performCreate(Activity.java:6237) 在 android.app.Instrumentation.callActivityOnCreate(Instrumentation.8821324694 5888:1107) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android .app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app. ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os. ZygoteInit.main(ZygoteInit.java:616)
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。
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