我想将屏幕方向锁定为其默认方向。我在实现此功能时遇到了问题。最初我从清单中将屏幕锁定为纵向。这适用于纵向默认设备。
但是许多平板电脑的默认方向是横向的,因此对于这些设备,锁定纵向不合适,我希望检测此默认方向并将其锁定。也就是说,如果横向是默认方向,则我要将方向锁定在横向,如果是纵向,则将其锁定在纵向。如何做到这一点?我不想支持两个方向(自动)。
我想将屏幕方向锁定为其默认方向。我在实现此功能时遇到了问题。最初我从清单中将屏幕锁定为纵向。这适用于纵向默认设备。
但是许多平板电脑的默认方向是横向的,因此对于这些设备,锁定纵向不合适,我希望检测此默认方向并将其锁定。也就是说,如果横向是默认方向,则我要将方向锁定在横向,如果是纵向,则将其锁定在纵向。如何做到这一点?我不想支持两个方向(自动)。
不同设备有默认方向,例如Galaxy 10平板电脑的默认方向与Nexus 7平板电脑不同。当您获取显示器的方向时,会得到以下值:
所以,在您的锁定方法中,您需要执行以下操作:
public void mLockScreenRotation(FA_Padre actividad){
int buildVersionSDK = Build.VERSION.SDK_INT;
Display display = ((WindowManager) actividad.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int orientation=0;
if(buildVersionSDK >= 8){
orientation=display.getRotation();
}
/****************Phone*************************************/
if(buildVersionSDK < 8){// older Android versions with only two orientations
switch (actividad.getResources().getConfiguration().orientation){
case Configuration.ORIENTATION_PORTRAIT:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
case Configuration.ORIENTATION_LANDSCAPE:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
}
}else if((buildVersionSDK > 7 ) && (!GlobalInfo.isTablet())){// Newer Android phones with more than two orientations
switch(orientation){
case Surface.ROTATION_0:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
case Surface.ROTATION_90:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Surface.ROTATION_180:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
case Surface.ROTATION_270:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
break;
}
/****************TABLET*************************************/
}else{
int width = 0;
int height = 0;
switch(orientation){
/*If the default orientation of the device is landscape Rotation_0 and rotation_180 will be the case if the device is being held in landscape. if the default orientation of the device is portrait rotation_0 or 180 will only be the case if the device is in portrait mode*/
case Surface.ROTATION_0:
case Surface.ROTATION_180:
width = display.getWidth();
height = display.getHeight();
break;
/*the opposite in here*/
case Surface.ROTATION_90: //
case Surface.ROTATION_270:
width = display.getHeight();
height = display.getWidth();
break;
default:
break;
}
if(width > height){//Default ORIENTATION = LANDSCAPE, lock the screen in the current orientation
switch(orientation){
case Surface.ROTATION_0:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Surface.ROTATION_90:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
break;
case Surface.ROTATION_180:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
break;
case Surface.ROTATION_270:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
}
} else {//Default ORIENTATION = PORTRAIT, lock the screen in the current orientation
switch(orientation){
case Surface.ROTATION_0:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
case Surface.ROTATION_90:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Surface.ROTATION_180:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
break;
case Surface.ROTATION_270:
actividad.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
break;
}
}
}
}
尝试将此锁屏设置为默认
Lockorientationactivity:
public class Lockorientationactivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int getConf=this.getResources().getConfiguration().orientation;
if(getConf==Configuration.ORIENTATION_PORTRAIT)
{
this.setRequestedOrientation(
ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
Toast.makeText(getBaseContext(), "ORIENTATION_PORTRAIT", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getBaseContext(), "ORIENTATION_LANDSCAPE", Toast.LENGTH_SHORT).show();
this.setRequestedOrientation(
ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
setContentView(R.layout.main);
}
}
但你必须为活动设置android:configChanges="orientation"
。
要通过代码锁定屏幕,您必须使用屏幕的实际旋转角度(0、90、180、270),并且您必须知道其自然位置,在智能手机上,自然位置将是纵向,在平板电脑上则为横向。
这是代码(锁定和解锁方法),它已在一些设备(智能手机和平板电脑)上进行了测试,并且运行良好。
public static void lockScreenOrientation(Activity activity)
{
WindowManager windowManager = (WindowManager) activity.getSystemService(Context.WINDOW_SERVICE);
Configuration configuration = activity.getResources().getConfiguration();
int rotation = windowManager.getDefaultDisplay().getRotation();
// Search for the natural position of the device
if(configuration.orientation == Configuration.ORIENTATION_LANDSCAPE &&
(rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180) ||
configuration.orientation == Configuration.ORIENTATION_PORTRAIT &&
(rotation == Surface.ROTATION_90 || rotation == Surface.ROTATION_270))
{
// Natural position is Landscape
switch (rotation)
{
case Surface.ROTATION_0:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Surface.ROTATION_90:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
break;
case Surface.ROTATION_180:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
break;
case Surface.ROTATION_270:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
}
}
else
{
// Natural position is Portrait
switch (rotation)
{
case Surface.ROTATION_0:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
case Surface.ROTATION_90:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Surface.ROTATION_180:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
break;
case Surface.ROTATION_270:
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
break;
}
}
}
public static void unlockScreenOrientation(Activity activity)
{
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}