Question

我的应用仅限于肖像，我仍然想了解我的活动方向更改

我需要这个以检测我的相机是否已在Portrait mode或Landscape mode

中拍照

我在registerActivityLifecycleCallback中使用MyApplication class将应用限制为肖像，但我还想知道用户是否在相机活动中旋转了屏幕

CameraActivity：

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
mOrientationEventListener=new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL) {
            @Override
            public void onOrientationChanged(int orientation) {
                int lastOrientation = mOrientation;

                Display display = ((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();

                if (display.getOrientation() == Surface.ROTATION_0) {   // landscape oriented devices

                    CAMERA_ORIENTATION = 1;
                   // methods.showToast(CameraActivity.this,"ORIENTATION_LANDSCAPE");
                    Log.e(TAG, "onOrientationChanged: ORIENTATION_LANDSCAPE ");
                    Log.e(TAG, "onOrientationChanged: CAMERA_ORIENTATION  = "+CAMERA_ORIENTATION);

                    if (orientation >= 315 || orientation < 45) {
                        if (mOrientation != ORIENTATION_LANDSCAPE_NORMAL) {
                            mOrientation = ORIENTATION_LANDSCAPE_NORMAL;
                        }
                    } else if (orientation < 315 && orientation >= 225) {
                        if (mOrientation != ORIENTATION_PORTRAIT_INVERTED) {
                            mOrientation = ORIENTATION_PORTRAIT_INVERTED;
                        }
                    } else if (orientation < 225 && orientation >= 135) {
                        if (mOrientation != ORIENTATION_LANDSCAPE_INVERTED) {
                            mOrientation = ORIENTATION_LANDSCAPE_INVERTED;
                        }
                    } else if (orientation <135 && orientation > 45) {
                        if (mOrientation != ORIENTATION_PORTRAIT_NORMAL) {
                            mOrientation = ORIENTATION_PORTRAIT_NORMAL;
                        }
                    }
                } else {  // portrait oriented devices

                    CAMERA_ORIENTATION = 0;
                    //methods.showToast(CameraActivity.this, "ORIENTATION_PORTRAIT");
                    Log.e(TAG, "onOrientationChanged: ORIENTATION_PORTRAIT ");
                    Log.e(TAG, "onOrientationChanged: CAMERA_ORIENTATION  = "+CAMERA_ORIENTATION);

                    if (orientation >= 315 || orientation < 45) {
                        if (mOrientation != ORIENTATION_PORTRAIT_NORMAL) {
                            mOrientation = ORIENTATION_PORTRAIT_NORMAL;
                        }
                    } else if (orientation < 315 && orientation >= 225) {
                        if (mOrientation != ORIENTATION_LANDSCAPE_NORMAL) {
                            mOrientation = ORIENTATION_LANDSCAPE_NORMAL;
                        }
                    } else if (orientation < 225 && orientation >= 135) {
                        if (mOrientation != ORIENTATION_PORTRAIT_INVERTED) {
                            mOrientation = ORIENTATION_PORTRAIT_INVERTED;
                        }
                    } else if (orientation <135 && orientation > 45) {
                        if (mOrientation != ORIENTATION_LANDSCAPE_INVERTED) {
                            mOrientation = ORIENTATION_LANDSCAPE_INVERTED;
                        }
                    }
                }
            }
        };

        if (mOrientationEventListener.canDetectOrientation()){
            Toast.makeText(this, "Can DetectOrientation", Toast.LENGTH_LONG).show();
            mOrientationEventListener.enable();
        }
        else{
            Toast.makeText(this, "Can't DetectOrientation", Toast.LENGTH_LONG).show();
        }

Answer 1

您可以使用SensorManager。 getOrientation获取设备在3D空间中的方向，然后将其转换为横向或纵向。

或者，如果您需要更新，可以注册重力传感器，看看重力是在x轴还是y轴上测量。如果用户将其平放在桌面上，那将无法工作，但另一种方法也不会。

即使应用仅限于肖像，也知道活动的方向

1 个答案: