Question

我在尝试获取设备方向时使用了SensorManager.getOrientation(matrixR, orientationMatrix);，如下所示。但我不知道为什么SensorManager.getOrientation(matrixR, orientationMatrix);，正如logcat所暗示的，它会导致应用程序崩溃？我试图省略SensorManager.getOrientation(matrixR, orientationMatrix);，应用程序正常运行。请帮我解决这个问题

JavaCode：

if (accelerometerValues != null && magnetometerValues != null) {
        float [] matrixR = new float[3];
        float [] matrixI = new float[3];
        boolean success = SensorManager.getRotationMatrix(matrixR, matrixI,   
        accelerometerValues, magnetometerValues);
        if (success) {
            float [] orientationMatrix = new float[3];
            SensorManager.getOrientation(matrixR, orientationMatrix);
            tvAzimuthReading.setText(Float.toString(orientationMatrix[0]));
            tvPitchReading.setText(Float.toString(orientationMatrix[1]));
            tvRollReading.setText(Float.toString(orientationMatrix[2]));
        } else {
            Toast.makeText(getApplicationContext(), "No Rmatrix", Toast.LENGTH_LONG).show();
        }
    }

logcat的：

04-23 02:01:50.476: D/dalvikvm(24772): GC_FOR_ALLOC freed 144K, 21% free 10121K/12664K,  
paused 11ms, total 11ms
04-23 02:01:50.481: I/dalvikvm-heap(24772): Grow heap (frag case) to 13.294MB for 
1127536-byte allocation
04-23 02:01:50.491: D/dalvikvm(24772): GC_FOR_ALLOC freed 2K, 19% free 11221K/13768K, 
paused 11ms, total 11ms
04-23 02:01:50.521: D/SensorManager(24772): registerListener :: create queue :: handler   
= 0, name = LSM330DLC Acceleration Sensor, delay = 200000, 
04-23 02:01:50.521: D/SensorManager(24772): registerListener :: handler = 1, name =  
AK8963C Magnetic field Sensor, delay = 200000, 
04-23 02:01:50.596: D/libEGL(24772): loaded /system/lib/egl/libEGL_mali.so
04-23 02:01:50.601: D/libEGL(24772): loaded /system/lib/egl/libGLESv1_CM_mali.so
04-23 02:01:50.601: D/libEGL(24772): loaded /system/lib/egl/libGLESv2_mali.so
04-23 02:01:50.606: E/(24772): Device driver API match
04-23 02:01:50.606: E/(24772): Device driver API version: 23
04-23 02:01:50.606: E/(24772): User space API version: 23 
04-23 02:01:50.606: E/(24772): mali: REVISION=Linux-r3p2-01rel3 BUILD_DATE=Fri Nov 29   
14:18:37 KST 2013 
04-23 02:01:50.676: D/OpenGLRenderer(24772): Enabling debug mode 0
04-23 02:01:50.781: E/SensorManager(24772): Exception dispatching input event.
04-23 02:01:50.781: D/AndroidRuntime(24772): Shutting down VM
04-23 02:01:50.781: W/dalvikvm(24772): threadid=1: thread exiting with uncaught    
exception (group=0x41c11700)
04-23 02:01:50.786: E/AndroidRuntime(24772): FATAL EXCEPTION: main
04-23 02:01:50.786: E/AndroidRuntime(24772): java.lang.ArrayIndexOutOfBoundsException:  
length=3; index=5
04-23 02:01:50.786: E/AndroidRuntime(24772):    at   
android.hardware.SensorManager.getOrientation(SensorManager.java:1135)
04-23 02:01:50.786: E/AndroidRuntime(24772):    at   
com.example.sensortest01.SensorTest01.onSensorChanged(SensorTest01.java:122)
04-23 02:01:50.786: E/AndroidRuntime(24772):    at

Answer 1

尝试将matrixR和matrixI定义如下：

float [] matrixR = new float[9];
float [] matrixI = new float[9];

getOrientationMatrix导致应用程序崩溃

1 个答案: