Derive from Adapter and only override what you need

app/src/main/java/com/github/florent37/camerafragment/sample/MainActivity.java

@@ -16,10 +16,10 @@ import android.widget.Toast;
 import com.github.florent37.camerafragment.CameraFragment;
 import com.github.florent37.camerafragment.CameraFragmentApi;
 import com.github.florent37.camerafragment.configuration.Configuration;
-import com.github.florent37.camerafragment.listeners.CameraFragmentControlsListener;
-import com.github.florent37.camerafragment.listeners.CameraFragmentResultListener;
-import com.github.florent37.camerafragment.listeners.CameraFragmentStateListener;
-import com.github.florent37.camerafragment.listeners.CameraFragmentVideoRecordTextListener;
+import com.github.florent37.camerafragment.listeners.CameraFragmentControlsAdapter;
+import com.github.florent37.camerafragment.listeners.CameraFragmentResultAdapter;
+import com.github.florent37.camerafragment.listeners.CameraFragmentStateAdapter;
+import com.github.florent37.camerafragment.listeners.CameraFragmentVideoRecordTextAdapter;
 import com.github.florent37.camerafragment.widgets.CameraSettingsView;
 import com.github.florent37.camerafragment.widgets.CameraSwitchView;
 import com.github.florent37.camerafragment.widgets.FlashSwitchView;
@@ -87,7 +87,7 @@ public class MainActivity extends AppCompatActivity {
     public void onRecordButtonClicked() {
         final CameraFragmentApi cameraFragment = getCameraFragment();
         if (cameraFragment != null) {
-            cameraFragment.takePhotoOrCaptureVideo(new CameraFragmentResultListener() {
+            cameraFragment.takePhotoOrCaptureVideo(new CameraFragmentResultAdapter() {
                 @Override
                 public void onVideoRecorded(String filePath) {
                     Toast.makeText(getBaseContext(), "onVideoRecorded " + filePath, Toast.LENGTH_SHORT).show();
@@ -176,7 +176,7 @@ public class MainActivity extends AppCompatActivity {
             //    }
             //});
 
-            cameraFragment.setStateListener(new CameraFragmentStateListener() {
+            cameraFragment.setStateListener(new CameraFragmentStateAdapter() {
 
                 @Override
                 public void onCurrentCameraBack() {
@@ -255,7 +255,7 @@ public class MainActivity extends AppCompatActivity {
                 }
             });
 
-            cameraFragment.setControlsListener(new CameraFragmentControlsListener() {
+            cameraFragment.setControlsListener(new CameraFragmentControlsAdapter() {
                 @Override
                 public void lockControls() {
                     cameraSwitchView.setEnabled(false);
@@ -288,7 +288,7 @@ public class MainActivity extends AppCompatActivity {
                 }
             });
 
-            cameraFragment.setTextListener(new CameraFragmentVideoRecordTextListener() {
+            cameraFragment.setTextListener(new CameraFragmentVideoRecordTextAdapter() {
                 @Override
                 public void setRecordSizeText(long size, String text) {
                     recordSizeText.setText(text);

camerafragment/src/main/java/com/github/florent37/camerafragment/listeners/CameraFragmentControlsAdapter.java

@@ -0,0 +1,33 @@
+package com.github.florent37.camerafragment.listeners;
+
+/**
+ * Convenience implementation of {@link CameraFragmentControlsListener}. Derive from this and only override what you need.
+ * @author Skala
+ */
+
+public class CameraFragmentControlsAdapter implements CameraFragmentControlsListener {
+    @Override
+    public void lockControls() {
+
+    }
+
+    @Override
+    public void unLockControls() {
+
+    }
+
+    @Override
+    public void allowCameraSwitching(boolean allow) {
+
+    }
+
+    @Override
+    public void allowRecord(boolean allow) {
+
+    }
+
+    @Override
+    public void setMediaActionSwitchVisible(boolean visible) {
+
+    }
+}

camerafragment/src/main/java/com/github/florent37/camerafragment/listeners/CameraFragmentResultAdapter.java

@@ -0,0 +1,18 @@
+package com.github.florent37.camerafragment.listeners;
+
+/**
+ * Convenience implementation of {@link CameraFragmentResultListener}. Derive from this and only override what you need.
+ * @author Skala
+ */
+
+public class CameraFragmentResultAdapter implements CameraFragmentResultListener {
+    @Override
+    public void onVideoRecorded(String filePath) {
+
+    }
+
+    @Override
+    public void onPhotoTaken(byte[] bytes, String filePath) {
+
+    }
+}

camerafragment/src/main/java/com/github/florent37/camerafragment/listeners/CameraFragmentStateAdapter.java

@@ -0,0 +1,75 @@
+package com.github.florent37.camerafragment.listeners;
+
+import java.io.File;
+
+/**
+ * Convenience implementation of {@link CameraFragmentStateListener}. Derive from this and only override what you need.
+ * @author Skala
+ */
+
+public class CameraFragmentStateAdapter implements CameraFragmentStateListener {
+    @Override
+    public void onCurrentCameraBack() {
+
+    }
+
+    @Override
+    public void onCurrentCameraFront() {
+
+    }
+
+    @Override
+    public void onFlashAuto() {
+
+    }
+
+    @Override
+    public void onFlashOn() {
+
+    }
+
+    @Override
+    public void onFlashOff() {
+
+    }
+
+    @Override
+    public void onCameraSetupForPhoto() {
+
+    }
+
+    @Override
+    public void onCameraSetupForVideo() {
+
+    }
+
+    @Override
+    public void onRecordStateVideoReadyForRecord() {
+
+    }
+
+    @Override
+    public void onRecordStateVideoInProgress() {
+
+    }
+
+    @Override
+    public void onRecordStatePhoto() {
+
+    }
+
+    @Override
+    public void shouldRotateControls(int degrees) {
+
+    }
+
+    @Override
+    public void onStartVideoRecord(File outputFile) {
+
+    }
+
+    @Override
+    public void onStopVideoRecord() {
+
+    }
+}

camerafragment/src/main/java/com/github/florent37/camerafragment/listeners/CameraFragmentVideoRecordTextAdapter.java

@@ -0,0 +1,28 @@
+package com.github.florent37.camerafragment.listeners;
+
+/**
+ * Convenience implementation of {@link CameraFragmentVideoRecordTextListener}. Derive from this and only override what you need.
+ * @author Skala
+ */
+
+public class CameraFragmentVideoRecordTextAdapter implements CameraFragmentVideoRecordTextListener {
+    @Override
+    public void setRecordSizeText(long size, String text) {
+
+    }
+
+    @Override
+    public void setRecordSizeTextVisible(boolean visible) {
+
+    }
+
+    @Override
+    public void setRecordDurationText(String text) {
+
+    }
+
+    @Override
+    public void setRecordDurationTextVisible(boolean visible) {
+
+    }
+}