当我编译我的程序我刚刚得到这个错误。我试图解决它但失败。有人可以帮助我吗？谢谢。java.lang.ExceptionInInitializerError在录制
过程：com.detection，PID：6403 java.lang.ExceptionInInitializerError 在java.lang.Class.classForName（本机方法） 在java.lang.Class.forName（Class.java:324） 在com.googlecode.javacpp.Loader.load（Loader.java:561） 在com.googlecode.javacpp.Loader.load（Loader.java:540） 在com.googlecode.javacv.cpp.opencv_core $ CvArr。 （opencv_core.java:156） 在com.googlecode.javacv.cpp.opencv_core $ IplImage.create（opencv_core.java:421） 在com.detection。 MainActivity.initRecorder（MainActivity.java:188） at com.detection.MainActivity.onCreate（MainActivity.java:90） at android.app.Activity.performCreate（Activity.java:6904） at android.app.Instrumentation。 callActivityOnCreate（Instrumentation.java:1136） 在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:3267） 在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:3416） 在android.app.ActivityThread.access $ 1100 （ActivityThread.java:229） 在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1821） 在android.os.Handler.dispatchMessage（Handler.java:102） at android.os.Looper.loop（Looper.java:148） at android.app.ActivityThread.main（ActivityThread.java:7407） at java.lang.reflect.Method.invoke（Native Method） at com .android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1230） at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1120） 引起：java.lang.NullPointerException：尝试在com.googlecode.javacpp.Loader.sizeof（Loader.java:837） 上的空对象引用 调用虚拟方法java.lang.Object中java.util.HashMap.get（java.lang.Object中）'在com.googlecode.javacv.cpp.opencv_core。（opencv_core.java:1259） 在java.lang.Class.classForName（Native Method） at java.lang.Class.forName（Class.java:324） at com.googlecode.javacpp.Loader.load（Loader.java:561） at com。 googlecode.javacpp.Loader.load（Loader.java:540） at com.googlecode.javacv.cpp.opencv_core $ CvArr。（opencv_core.java:156） at com.googlecode.javacv.cpp.opencv_core $ IplImage.create （opencv_core.java:421） 在com.detection.MainActivity.initRecorder（MainActivity.java:188） 在com.detection.MainActivity.onCreate（MainActivity.java:90） 在android.app.Activity.performCreate（活动.java：6904） at android.app.I （android.app.ActivityThread.java:3416） at android.app.ActivityThread。访问android.os.Handler.dispatchMessage（Handler.java:102） at android.os.Looper .loop（活套。Java的：148） 在android.app.ActivityThread.main（ActivityThread.java:7407） 在java.lang.reflect.Method.invoke（本机方法） 在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run （ZygoteInit.java:1230） 在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1120） 08-17 15：52：37.291 6403-6411/com.detection E /系统：未捕获的抛出异常终结者 08-17 15：52：37.291 6403-6411/com.detection E/System：java.lang.IllegalStateException：Binder已经完成！ 在android.os.BinderProxy.transactNative（本机方法） 在android.os.BinderProxy.transact（Binder.java:503） 在android.os.IPowerManager $存根$ Proxy.releaseWakeLock（IPowerManager.java:686） android.os.PowerManager $ WakeLock.finalize（PowerManager.java:1627） at java.lang.Daemons $ FinalizerDaemon.doFinalize（Daemons.java:217） at java.lang.Daemons $ FinalizerDaemon.run（Daemons.java ：200） 在java.lang.Thread.run（Thread.java:818）
我的build.gradle是
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "26.0.0"
defaultConfig {
applicationId "com.detection"
minSdkVersion 23
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags ""
}
}
ndk {
abiFilters "armeabi-v7a", "x86", "armeabi", "mips"
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
sourceSets { main { jni.srcDirs = ['src/main/jni', 'src/main/jniLibs/'] } }
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'
compile project(':openCVLibrary320')
compile files('libs/javacv.jar')
compile files('libs/javacpp.jar')
compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.2.0-1.3'
}，这是我的代码。
package com.detection;
import android.app.Activity;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.hardware.Camera;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.PowerManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import com.googlecode.javacv.FFmpegFrameRecorder;
import com.googlecode.javacv.cpp.opencv_core;
import java.io.IOException;
import java.nio.ShortBuffer;
import static com.googlecode.javacv.cpp.opencv_core.IPL_DEPTH_8U;
public class MainActivity extends Activity implements View.OnClickListener {
private final static String CLASS_LABEL = "RecordActivity";
private final static String LOG_TAG = CLASS_LABEL;
private PowerManager.WakeLock mWakeLock;
private String ffmpeg_link = "/mnt/sdcard/stream.flv";
long startTime = 0;
boolean recording = false;
private volatile FFmpegFrameRecorder recorder;
private boolean isPreviewOn = false;
private int sampleAudioRateInHz = 44100;
private int imageWidth = 320;
private int imageHeight = 240;
private int frameRate = 30;
/* audio data getting thread */
private AudioRecord audioRecord;
private AudioRecordRunnable audioRecordRunnable;
private Thread audioThread;
volatile boolean runAudioThread = true;
/* video data getting thread */
private Camera cameraDevice;
private CameraView cameraView;
private opencv_core.IplImage yuvIplimage = null;
/* layout setting */
private final int bg_screen_bx = 232;
private final int bg_screen_by = 128;
private final int bg_screen_width = 700;
private final int bg_screen_height = 500;
private final int bg_width = 1123;
private final int bg_height = 715;
private final int live_width = 640;
private final int live_height = 480;
private int screenWidth, screenHeight;
private Button btnRecorderControl;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.activity_main);
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, CLASS_LABEL);
mWakeLock.acquire();
initLayout();
initRecorder();
}
@Override
protected void onResume() {
super.onResume();
if (mWakeLock == null) {
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, CLASS_LABEL);
mWakeLock.acquire();
}
}
@Override
protected void onPause() {
super.onPause();
if (mWakeLock != null) {
mWakeLock.release();
mWakeLock = null;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
recording = false;
if (cameraView != null) {
cameraView.stopPreview();
}
if(cameraDevice != null) {
cameraDevice.stopPreview();
cameraDevice.release();
cameraDevice = null;
}
if (mWakeLock != null) {
mWakeLock.release();
mWakeLock = null;
}
}
private void initLayout() {
/* get size of screen */
Display display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
screenWidth = display.getWidth();
screenHeight = display.getHeight();
RelativeLayout.LayoutParams layoutParam = null;
LayoutInflater myInflate = null;
myInflate = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
RelativeLayout topLayout = new RelativeLayout(this);
setContentView(topLayout);
LinearLayout preViewLayout = (LinearLayout) myInflate.inflate(R.layout.activity_main, null);
layoutParam = new RelativeLayout.LayoutParams(screenWidth, screenHeight);
topLayout.addView(preViewLayout, layoutParam);
/* add control button: start and stop */
btnRecorderControl = (Button) findViewById(R.id.recorder_control);
btnRecorderControl.setText("Start");
btnRecorderControl.setOnClickListener(this);
/* add camera view */
int display_width_d = (int) (1.0 * bg_screen_width * screenWidth/bg_width);
int display_height_d = (int) (1.0 * bg_screen_height * screenHeight/bg_height);
int prev_rw, prev_rh;
if (1.0 * display_width_d/display_height_d > 1.0 * live_width/live_height) {
prev_rh = display_height_d;
prev_rw = (int) (1.0 * display_height_d * live_width/live_height);
} else {
prev_rw = display_width_d;
prev_rh = (int) (1.0 * display_width_d * live_height/live_width);
}
layoutParam = new RelativeLayout.LayoutParams(prev_rw, prev_rh);
layoutParam.topMargin = (int) (1.0 * bg_screen_by * screenHeight/bg_height);
layoutParam.leftMargin = (int) (1.0 * bg_screen_bx * screenWidth/bg_width);
cameraDevice = Camera.open();
Log.i(LOG_TAG, "cameara open");
cameraView = new CameraView(this, cameraDevice);
topLayout.addView(cameraView, layoutParam);
Log.i(LOG_TAG, "cameara preview start: OK");
}
//---------------------------------------
// initialize ffmpeg_recorder
//---------------------------------------
private void initRecorder() {
Log.w(LOG_TAG,"init recorder");
if (yuvIplimage == null) {
yuvIplimage = opencv_core.IplImage.create(imageWidth, imageHeight, IPL_DEPTH_8U, 2);
Log.i(LOG_TAG, "create yuvIplimage");
}
Log.i(LOG_TAG, "ffmpeg_url: " + ffmpeg_link);
recorder = new FFmpegFrameRecorder(ffmpeg_link, imageWidth, imageHeight, 1);
recorder.setFormat("flv");
recorder.setSampleRate(sampleAudioRateInHz);
// Set in the surface changed method
recorder.setFrameRate(frameRate);
Log.i(LOG_TAG, "recorder initialize success");
audioRecordRunnable = new AudioRecordRunnable();
audioThread = new Thread(audioRecordRunnable);
runAudioThread = true;
}
public void startRecording() {
try {
recorder.start();
startTime = System.currentTimeMillis();
recording = true;
audioThread.start();
} catch (FFmpegFrameRecorder.Exception e) {
e.printStackTrace();
}
}
public void stopRecording() {
runAudioThread = false;
try {
audioThread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
audioRecordRunnable = null;
audioThread = null;
if (recorder != null && recording) {
recording = false;
Log.v(LOG_TAG,"Finishing recording, calling stop and release on recorder");
try {
recorder.stop();
recorder.release();
} catch (FFmpegFrameRecorder.Exception e) {
e.printStackTrace();
}
recorder = null;
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (recording) {
stopRecording();
}
finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
//---------------------------------------------
// audio thread, gets and encodes audio data
//---------------------------------------------
class AudioRecordRunnable implements Runnable {
@Override
public void run() {
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
// Audio
int bufferSize;
short[] audioData;
int bufferReadResult;
bufferSize = AudioRecord.getMinBufferSize(sampleAudioRateInHz,
AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleAudioRateInHz,
AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
audioData = new short[bufferSize];
Log.d(LOG_TAG, "audioRecord.startRecording()");
audioRecord.startRecording();
/* ffmpeg_audio encoding loop */
while (runAudioThread) {
//Log.v(LOG_TAG,"recording? " + recording);
bufferReadResult = audioRecord.read(audioData, 0, audioData.length);
if (bufferReadResult > 0) {
Log.v(LOG_TAG,"bufferReadResult: " + bufferReadResult);
// If "recording" isn't true when start this thread, it never get's set according to this if statement...!!!
// Why? Good question...
if (recording) {
try {
recorder.record(ShortBuffer.wrap(audioData, 0, bufferReadResult));
//Log.v(LOG_TAG,"recording " + 1024*i + " to " + 1024*i+1024);
} catch (FFmpegFrameRecorder.Exception e) {
Log.v(LOG_TAG,e.getMessage());
e.printStackTrace();
}
}
}
}
Log.v(LOG_TAG,"AudioThread Finished, release audioRecord");
/* encoding finish, release recorder */
if (audioRecord != null) {
audioRecord.stop();
audioRecord.release();
audioRecord = null;
Log.v(LOG_TAG,"audioRecord released");
}
}
}
//---------------------------------------------
// camera thread, gets and encodes video data
//---------------------------------------------
class CameraView extends SurfaceView implements SurfaceHolder.Callback, Camera.PreviewCallback {
private SurfaceHolder mHolder;
private Camera mCamera;
public CameraView(Context context, Camera camera) {
super(context);
Log.w("camera","camera view");
mCamera = camera;
mHolder = getHolder();
mHolder.addCallback(CameraView.this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mCamera.setPreviewCallback(CameraView.this);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
stopPreview();
mCamera.setPreviewDisplay(holder);
} catch (IOException exception) {
mCamera.release();
mCamera = null;
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Log.v(LOG_TAG,"Setting imageWidth: " + imageWidth + " imageHeight: " + imageHeight + " frameRate: " + frameRate);
Camera.Parameters camParams = mCamera.getParameters();
camParams.setPreviewSize(imageWidth, imageHeight);
Log.v(LOG_TAG,"Preview Framerate: " + camParams.getPreviewFrameRate());
camParams.setPreviewFrameRate(frameRate);
mCamera.setParameters(camParams);
startPreview();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
try {
mHolder.addCallback(null);
mCamera.setPreviewCallback(null);
} catch (RuntimeException e) {
// The camera has probably just been released, ignore.
}
}
public void startPreview() {
if (!isPreviewOn && mCamera != null) {
isPreviewOn = true;
mCamera.startPreview();
}
}
public void stopPreview() {
if (isPreviewOn && mCamera != null) {
isPreviewOn = false;
mCamera.stopPreview();
}
}
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
/* get video data */
if (yuvIplimage != null && recording) {
yuvIplimage.getByteBuffer().put(data);
Log.v(LOG_TAG,"Writing Frame");
try {
long t = 1000 * (System.currentTimeMillis() - startTime);
if (t > recorder.getTimestamp()) {
recorder.setTimestamp(t);
}
recorder.record(yuvIplimage);
} catch (FFmpegFrameRecorder.Exception e) {
Log.v(LOG_TAG,e.getMessage());
e.printStackTrace();
}
}
}
}
@Override
public void onClick(View v) {
if (!recording) {
startRecording();
Log.w(LOG_TAG, "Start Button Pushed");
btnRecorderControl.setText("Stop");
} else {
// This will trigger the audio recording loop to stop and then set isRecorderStart = false;
stopRecording();
Log.w(LOG_TAG, "Stop Button Pushed");
btnRecorderControl.setText("Start");
}
}
}
检查：https://stackoverflow.com/questions/37804174/java-lang-exceptionininitializererror-in-android?rq = 1 –
嗨，如果它发生在Android Studio？ – Jim