Open front camera android studio 5.1

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I add a way to do it, first add the permissions within AndroidManifest.xml:

We create the CameraView class that is based on your original code:

import android.content.Context; import android.hardware.Camera; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView;

import java.io.IOException;

public class CameraView extends SurfaceView implements SurfaceHolder.Callback {

private SurfaceHolder mHolder;
private Camera mCamera;

public CameraView(Context context, Camera camera){
    super(context);

    mCamera = camera;
    mCamera.setDisplayOrientation(90);
    mHolder = getHolder();
    mHolder.addCallback(this);
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
}

@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
    try {
        mCamera.setPreviewDisplay(mHolder);
        mCamera.startPreview();
    } catch (IOException e) {
        Log.d("ERROR", "Camera error on surfaceCreater" + e.getMessage());
    }

}

@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i2, int i3) {
    if(mHolder.getSurface() == null)
        return;

    try{
        mCamera.stopPreview();
    } catch (Exception e){
        Log.e("ERROR",  e.getMessage());
    }

    try{
        mCamera.setPreviewDisplay(mHolder);
        mCamera.startPreview();
    } catch (IOException e) {
        Log.d("ERROR", "Camera error on surfaceChanged " + e.getMessage());
    }
}

@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
    mCamera.stopPreview();
    mCamera.release();
}

}

To load the view we create an activity, in which we first define the layout, activity_camera.xml:

<FrameLayout
    android:id="@+id/camera_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

</FrameLayout>

<ImageButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/imgClose"
    android:layout_gravity="right|top"
    android:background="@android:drawable/ic_menu_close_clear_cancel"
    android:padding="20dp"/>

We define our activity, which must be registered within your AndroidManifest.xml:

import android.hardware.Camera; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.View; import android.widget.FrameLayout; import android.widget.ImageButton;

public class CameraActivity extends AppCompatActivity {

private static final String TAG = "CameraActivity";


private Camera mCamera = null;
private CameraView mCameraView = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_camera);

    try{
        mCamera = Camera.open();
    } catch (Exception e){
        Log.d("ERROR", "Failed to get camera: " + e.getMessage());
    }

    if(mCamera != null) {
        mCameraView = new CameraView(this, mCamera);
        FrameLayout camera_view = (FrameLayout)findViewById(R.id.camera_view);
        camera_view.addView(mCameraView);//agrega la vista CameraView()
    }

    //boton para cerrar la aplicación.
    ImageButton imgClose = (ImageButton)findViewById(R.id.imgClose);
    imgClose.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //Cierra la actividad.
            finish();
        }
    });

}

}

When you run our application, the camera will open:

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Finally I commented that this example uses the Camera class which is obsolete from the API 21, you can still use it, but the use of the Camera2 class is recommended

For Android 6.0 I add method to request permissions.

private void checkCameraPermission () {     int permissionCheck = ContextCompat.checkSelfPermission (             this, Manifest.permission.CAMERA);     if (permissionCheck! = PackageManager.PERMISSION_GRANTED) {         Log.i ("Message", "You do not have permission for the camera!");             ActivityCompat.requestPermissions (this, new String [] {Manifest.permission.CAMERA}, 225);     } else {         Log.i ("Message", "You have permission to use the camera.");     } }