Support recording from front camera

README.md

@@ -2,4 +2,6 @@
 
 The recorded video will store in /sdcard/Pictures/MyCameraApp/*.mp4
 
-Now support Start/Stop button.
+- Support Start/Stop button.
+- Support choosing front or back camera for recording.
+

app/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
     package="example.chatea.servicecamera" >
 
     <uses-feature android:name="android.hardware.camera" />
+    <uses-feature android:name="android.hardware.camera.front" android:required="false" />
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.RECORD_AUDIO" />

app/src/main/java/example/chatea/servicecamera/CameraService.java

@@ -6,6 +6,7 @@
 import android.graphics.PixelFormat;
 import android.hardware.Camera;
 import android.media.CamcorderProfile;
+import android.media.CameraProfile;
 import android.media.MediaRecorder;
 import android.os.Bundle;
 import android.os.IBinder;
@@ -39,6 +40,8 @@ public class CameraService extends Service {
     private static final int COMMAND_START_RECORDING = 0;
     private static final int COMMAND_STOP_RECORDING = 1;
 
+    private static final String SELECTED_CAMERA_FOR_RECORDING = "cameraForRecording";
+
     private Camera mCamera;
     private MediaRecorder mMediaRecorder;
 
@@ -48,9 +51,11 @@ public class CameraService extends Service {
     public CameraService() {
     }
 
-    public static void startToStartRecording(Context context, ResultReceiver resultReceiver) {
+    public static void startToStartRecording(Context context, int cameraId,
+                                             ResultReceiver resultReceiver) {
         Intent intent = new Intent(context, CameraService.class);
         intent.putExtra(START_SERVICE_COMMAND, COMMAND_START_RECORDING);
+        intent.putExtra(SELECTED_CAMERA_FOR_RECORDING, cameraId);
         intent.putExtra(RESULT_RECEIVER, resultReceiver);
         context.startService(intent);
     }
@@ -111,7 +116,9 @@ private void handleStartRecordingCommand(Intent intent) {
         mRecording = true;
 
         if (Util.checkCameraHardware(this)) {
-            mCamera = Util.getCameraInstance();
+            final int cameraId = intent.getIntExtra(SELECTED_CAMERA_FOR_RECORDING,
+                    Camera.CameraInfo.CAMERA_FACING_BACK);
+            mCamera = Util.getCameraInstance(cameraId);
             if (mCamera != null) {
                 SurfaceView sv = new SurfaceView(this);
 
@@ -163,7 +170,11 @@ public void surfaceCreated(SurfaceHolder holder) {
                         mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                         mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
 
-                        mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
+                        if (cameraId == Camera.CameraInfo.CAMERA_FACING_BACK) {
+                            mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
+                        } else {
+                            mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_480P));
+                        }
 
                         mRecordingPath = Util.getOutputMediaFile(Util.MEDIA_TYPE_VIDEO).getPath();
                         mMediaRecorder.setOutputFile(mRecordingPath);

app/src/main/java/example/chatea/servicecamera/MainActivity.java

@@ -1,11 +1,13 @@
 package example.chatea.servicecamera;
 
 import android.app.Activity;
+import android.hardware.Camera;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.ResultReceiver;
 import android.view.View;
 import android.widget.Button;
+import android.widget.RadioButton;
 import android.widget.Toast;
 
 /**
@@ -16,13 +18,26 @@ public class MainActivity extends Activity {
     private boolean mRecording;
     private boolean mHandlingEvent;
 
+    private RadioButton mFrontRadioButton;
+    private RadioButton mBackRadioButton;
     private Button bt_recordingButton;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
+        mFrontRadioButton = (RadioButton) findViewById(R.id.front_camera_radio_button);
+        if (!Util.isCameraExist(Camera.CameraInfo.CAMERA_FACING_FRONT)) {
+            mFrontRadioButton.setVisibility(View.GONE);
+            mFrontRadioButton.setChecked(false);
+        }
+        mBackRadioButton = (RadioButton) findViewById(R.id.back_camera_radio_button);
+        if (!Util.isCameraExist(Camera.CameraInfo.CAMERA_FACING_BACK)) {
+            mFrontRadioButton.setVisibility(View.GONE);
+            mFrontRadioButton.setChecked(false);
+        }
+
         bt_recordingButton = (Button) findViewById(R.id.recording_button);
         bt_recordingButton.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -47,7 +62,15 @@ protected void onReceiveResult(int resultCode, Bundle resultData) {
                     mHandlingEvent = false;
                 }
             };
-            CameraService.startToStartRecording(this, receiver);
+            if (mFrontRadioButton.isChecked()) {
+                CameraService.startToStartRecording(this,
+                        Camera.CameraInfo.CAMERA_FACING_FRONT, receiver);
+            } else if (mBackRadioButton.isChecked()) {
+                CameraService.startToStartRecording(this,
+                        Camera.CameraInfo.CAMERA_FACING_FRONT, receiver);
+            } else {
+                throw new IllegalStateException("Must choose a camera for recording");
+            }
         }
     }
 

app/src/main/java/example/chatea/servicecamera/Util.java

@@ -25,10 +25,22 @@ public static boolean checkCameraHardware(Context context) {
         }
     }
 
-    public static Camera getCameraInstance() {
+    public static boolean isCameraExist(int cameraId) {
+        int numberOfCameras = Camera.getNumberOfCameras();
+        for (int i = 0; i < numberOfCameras; i++) {
+            Camera.CameraInfo info = new Camera.CameraInfo();
+            Camera.getCameraInfo(i, info);
+            if (info.facing == cameraId) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static Camera getCameraInstance(int cameraId) {
         Camera c = null;
         try {
-            c = Camera.open();
+            c = Camera.open(cameraId);
         } catch (Exception e) {
             Log.d("TAG", "Open camera failed: " + e);
         }

app/src/main/res/layout/activity_main.xml

@@ -8,6 +8,27 @@
     android:paddingTop="@dimen/activity_vertical_margin"
     android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
 
+    <RadioGroup
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:checkedButton="@+id/back_camera_radio_button">
+
+        <RadioButton
+            android:id="@+id/front_camera_radio_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/front_camera"
+            android:layout_weight="1" />
+
+        <RadioButton
+            android:id="@+id/back_camera_radio_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/back_camera"
+            android:layout_weight="1" />
+    </RadioGroup>
+
     <Button
         android:id="@+id/recording_button"
         android:layout_width="wrap_content"

app/src/main/res/values/strings.xml

@@ -1,9 +1,8 @@
 <resources>
     <string name="app_name">ServiceCamera</string>
 
-    <string name="hello_world">Hello world!</string>
-    <string name="action_settings">Settings</string>
-
     <string name="start_recording">Start Recording</string>
     <string name="stop_recording">Stop Recording</string>
+    <string name="front_camera">Front Camera</string>
+    <string name="back_camera">Back Camera</string>
 </resources>