change primary directory to /sdcard/Documents

Fix below exception when click record button:
E MediaProvider: java.lang.IllegalArgumentException: Primary directory null not
allowed for content://media/external_primary/file; allowed directories are [Download, Documents]
   at com.android.providers.media.MediaProvider.ensureFileColumns(MediaProvider.java:2672)
   at com.android.providers.media.MediaProvider.ensureUniqueFileColumns(MediaProvider.java:2337)
   at com.android.providers.media.MediaProvider.insertFile(MediaProvider.java:2947)
   at com.android.providers.media.MediaProvider.insertInternal(MediaProvider.java:3470)
   at com.android.providers.media.MediaProvider.insert(MediaProvider.java:3198)
   at com.android.providers.media.MediaProvider.insertFileForFuse(MediaProvider.java:6625)
   at com.android.providers.media.MediaProvider.insertFileIfNecessaryForFuse(MediaProvider.java:6708)

Also removed several extra tabs.

Signed-off-by: Jindong <jindong.yue@nxp.com>
Change-Id: I8b82a5345d3100763f0426f8d0474d575086100c
diff --git a/src/com/android/soundrecorder/Recorder.java b/src/com/android/soundrecorder/Recorder.java
index 9d906c2..91b5318 100644
--- a/src/com/android/soundrecorder/Recorder.java
+++ b/src/com/android/soundrecorder/Recorder.java
@@ -137,20 +137,21 @@
      */
     public void clear() {
         stop();
-        
+
         mSampleLength = 0;
-        
+
         signalStateChanged(IDLE_STATE);
     }
-    
+
     public void startRecording(int outputfileformat, String extension, Context context) {
         stop();
-        
+
         if (mSampleFile == null) {
-            File sampleDir = Environment.getExternalStorageDirectory();
+            File sampleDir = Environment.getExternalStoragePublicDirectory(
+                    Environment.DIRECTORY_DOCUMENTS);
             if (!sampleDir.canWrite()) // Workaround for broken sdcard support on the device.
                 sampleDir = new File("/sdcard/sdcard");
-            
+
             try {
                 mSampleFile = File.createTempFile(SAMPLE_PREFIX, extension, sampleDir);
             } catch (IOException e) {
@@ -158,7 +159,7 @@
                 return;
             }
         }
-        
+
         mRecorder = new MediaRecorder();
         mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
         mRecorder.setOutputFormat(outputfileformat);