title: IllegalArgumentException while reading a video file from External Stroage
body: <p>I have a problem that I am getting IllegalArgumentException while reading a video file from sdcard. I don't know why? Please suggest me the right solution for the same.</p>
  
  <p><strong>ErrorStack:</strong></p>
  
  <pre><code>11-03 18:56:18.733: ERROR/AndroidRuntime(24192): FATAL EXCEPTION: main
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example/com.example.TestCryptoActivity}: java.lang.IllegalArgumentException: File /mnt/sdcard/E0022505.mp4 contains a path separator
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.os.Handler.dispatchMessage(Handler.java:99)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.os.Looper.loop(Looper.java:123)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.ActivityThread.main(ActivityThread.java:4627)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at java.lang.reflect.Method.invokeNative(Native Method)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at java.lang.reflect.Method.invoke(Method.java:521)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at dalvik.system.NativeStart.main(Native Method)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192): Caused by: java.lang.IllegalArgumentException: File /mnt/sdcard/E0022505.mp4 contains a path separator
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.ContextImpl.makeFilename(ContextImpl.java:1602)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.ContextImpl.openFileInput(ContextImpl.java:399)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.content.ContextWrapper.openFileInput(ContextWrapper.java:152)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at com.example.TestCryptoActivity.onCreate(TestCryptoActivity.java:29)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
  11-03 18:56:18.733: ERROR/AndroidRuntime(24192):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
  </code></pre>
  
  <p><strong>Code:</strong></p>
  
  <pre><code>    try {
          is = this.openFileInput(Environment.getExternalStorageDirectory()+"/E0022505.mp4");
      } catch (FileNotFoundException e2) {
          // TODO Auto-generated catch block
          e2.printStackTrace();
      }
  ByteArrayOutputStream bos = new ByteArrayOutputStream();
  byte[] b = new byte[2097152];
  try {
          while ((bytesRead  = is.read(b)) != -1) {
             bos.write(b, 0, bytesRead);
          }
      } catch (IOException e1) {
          // TODO Auto-generated catch block
          e1.printStackTrace();
      }
  byte[] bytes = bos.toByteArray();
  try {
          String byteString = new String(bytes,"UTF-8");
          System.out.println("the bytes array of video:"+byteString);
      } catch (UnsupportedEncodingException e1) {
          // TODO Auto-generated catch block
          e1.printStackTrace();
      }
  </code></pre>