MediaPlayer.setDataSource Exception: NullPointerException Cause: Java.io.File.fixSlashes (filename)

I have a box and an app that plays videos from a file on an SD card. The application is launched when the mobile device is loaded. When the device reboots, the app waits for the SD card to be mounted, then it will navigate to the file path on the SD card and try to play the file using the MediaPlayer api. But the app crashes with downstream logs. The app works fine if the user starts the app manually while the device is running rather than booting.

09-22 18:53:39.700: W/System.err(1302): java.lang.NullPointerException
09-22 18:53:39.700: W/System.err(1302):     at java.io.File.fixSlashes(File.java:185)
09-22 18:53:39.700: W/System.err(1302):     at java.io.File.<init>(File.java:134)
09-22 18:53:39.700: W/System.err(1302):     at com.sherbet.taxi.FullVideoActivity.setUpVideoFrom(FullVideoActivity.java:225)
09-22 18:53:39.700: W/System.err(1302):     at com.sherbet.taxi.FullVideoActivity.onCreate(FullVideoActivity.java:112)
09-22 18:53:39.700: W/System.err(1302):     at android.app.Activity.performCreate(Activity.java:5008)
09-22 18:53:39.700: W/System.err(1302):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
09-22 18:53:39.700: W/System.err(1302):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2035)
09-22 18:53:39.700: W/System.err(1302):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2096)
09-22 18:53:39.700: W/System.err(1302):     at android.app.ActivityThread.access$600(ActivityThread.java:138)
09-22 18:53:39.700: W/System.err(1302):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1207)
09-22 18:53:39.700: W/System.err(1302):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-22 18:53:39.700: W/System.err(1302):     at android.os.Looper.loop(Looper.java:213)
09-22 18:53:39.700: W/System.err(1302):     at android.app.ActivityThread.main(ActivityThread.java:4787)
09-22 18:53:39.700: W/System.err(1302):     at java.lang.reflect.Method.invokeNative(Native Method)
09-22 18:53:39.700: W/System.err(1302):     at java.lang.reflect.Method.invoke(Method.java:511)
09-22 18:53:39.700: W/System.err(1302):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
09-22 18:53:39.700: W/System.err(1302):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
09-22 18:53:39.700: W/System.err(1302):     at dalvik.system.NativeStart.main(Native Method)
09-22 18:53:39.730: E/MediaPlayer(1302): error (1, -2147483648)
09-22 18:53:39.830: E/MediaPlayer(1302): prepareAsync called in state 1
09-22 18:53:39.830: W/System.err(1302): java.lang.IllegalStateException
09-22 18:53:39.830: W/System.err(1302):     at android.media.MediaPlayer.prepare(Native Method)
09-22 18:53:39.830: W/System.err(1302):     at com.sherbet.taxi.FullVideoActivity.play(FullVideoActivity.java:187)
09-22 18:53:39.830: W/System.err(1302):     at com.sherbet.taxi.FullVideoActivity.surfaceChanged(FullVideoActivity.java:354)
09-22 18:53:39.830: W/System.err(1302):     at android.view.SurfaceView.updateWindow(SurfaceView.java:558)
09-22 18:53:39.840: W/System.err(1302):     at android.view.SurfaceView.access$000(SurfaceView.java:85)
09-22 18:53:39.840: W/System.err(1302):     at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:173)
09-22 18:53:39.840: W/System.err(1302):     at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:671)
09-22 18:53:39.840: W/System.err(1302):     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1828)
09-22 18:53:39.840: W/System.err(1302):     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
09-22 18:53:39.840: W/System.err(1302):     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4223)
09-22 18:53:39.840: W/System.err(1302):     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
09-22 18:53:39.840: W/System.err(1302):     at android.view.Choreographer.doCallbacks(Choreographer.java:555)
09-22 18:53:39.840: W/System.err(1302):     at android.view.Choreographer.doFrame(Choreographer.java:525)
09-22 18:53:39.840: W/System.err(1302):     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
09-22 18:53:39.840: W/System.err(1302):     at android.os.Handler.handleCallback(Handler.java:615)
09-22 18:53:39.850: W/System.err(1302):     at android.os.Handler.dispatchMessage(Handler.java:92)
09-22 18:53:39.850: W/System.err(1302):     at android.os.Looper.loop(Looper.java:213)
09-22 18:53:39.850: W/System.err(1302):     at android.app.ActivityThread.main(ActivityThread.java:4787)
09-22 18:53:39.850: W/System.err(1302):     at java.lang.reflect.Method.invokeNative(Native Method)
09-22 18:53:39.850: W/System.err(1302):     at java.lang.reflect.Method.invoke(Method.java:511)
09-22 18:53:39.850: W/System.err(1302):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
09-22 18:53:39.850: W/System.err(1302):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
09-22 18:53:39.850: W/System.err(1302):     at dalvik.system.NativeStart.main(Native Method)
09-22 18:53:39.860: E/MediaPlayer(1302): Error (1,-2147483648)

      

        
        
        
      

    

Code:

File file = new File(videoUrl);
file.setReadable(true, false);
Utils.ShowLogMsg("filepath: " + file.getAbsolutePath()
                + " exists: " + file.exists());
FileInputStream inputStream = new FileInputStream(file);
FileDescriptor fd = inputStream.getFD();
Utils.ShowLogMsg("file length: " + file.length());
**

mPlayer.setDataSource(fd, 0, file.length());
        inputStream.close();

**

      

        
        
        
      

    

The application runs on the highlighted line of code. Can anyone help me to solve this problem.

Thank you Ishan Jain