如何改變方向但保持自動旋轉屏幕

當你點擊全屏圖標在YouTube的應用程序，它會改變爲風景和全屏，發現仍然是自動旋轉模式，如何做到這一點？如何改變方向但保持自動旋轉屏幕

如果設置lanscape模式：setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE)（設備總是景觀）

點擊全屏

Click fullscreen

lanscape

Lanscape

肖像

portrain

我解決了問題使用傳感器來檢測橫向或縱向

@Override 
public void onPause() { 
    super.onPause(); 
    videoview.pause(); 
    mSensorManager.unregisterListener(this); 
} 

@Override 
public void onResume() { 
    super.onResume(); 

    mSensorManager = (SensorManager) getActivity().getSystemService(Activity.SENSOR_SERVICE); 
    mRotationSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR); 
    mSensorManager.registerListener(this, mRotationSensor, SensorManager.SENSOR_DELAY_NORMAL); 
} 

@Override 
public void onSensorChanged(SensorEvent event) { 
    if (event.sensor == mRotationSensor) { 
     if (event.values.length > 4) { 
      float[] truncatedRotationVector = new float[4]; 
      System.arraycopy(event.values, 0, truncatedRotationVector, 0, 4); 
      update(truncatedRotationVector); 
     } else { 
      update(event.values); 
     } 
    } 

} 

private void update(float[] vectors) { 
    float[] rotationMatrix = new float[9]; 
    SensorManager.getRotationMatrixFromVector(rotationMatrix, vectors); 
    int worldAxisX = SensorManager.AXIS_X; 
    int worldAxisZ = SensorManager.AXIS_Z; 
    float[] adjustedRotationMatrix = new float[9]; 
    SensorManager.remapCoordinateSystem(rotationMatrix, worldAxisX, worldAxisZ, adjustedRotationMatrix); 
    float[] orientation = new float[3]; 
    SensorManager.getOrientation(adjustedRotationMatrix, orientation); 
    // float pitch = (float) Math.toDegrees(orientation[1]); 
    float roll = (float) Math.toDegrees(orientation[2]); 

    boolean curentOrient = isPortrait; 
    if(roll >= -75 && roll <= 75){ 
     isPortrait = true; 
     System.out.println("Portrait"); 
    }else{ 
     isPortrait = false; 
     System.out.println("Landscape"); 
    } 
    if(curentOrient != isPortrait){ 
     videoview.toggleFullScreen(isPortrait); // this is my videoview. 
    } 
} 
@Override 
public void onAccuracyChanged(Sensor sensor, int accuracy) { 
}

個

，讓工具SensorEventListener

來源

2014-12-04 vuhung3990