android-orientation

问题 I have an Android application using LinearLayout as main layout with a SurfaceView filled by camera preview. In this I inflate another LinearLayout with three Buttons and a custom TextView. I would like the camera preview to stay always in Landscape orientation and the overlay layout changing according to the device orientation. I tried setting android:screenOrientation="landscape" in the manifest for the activity but then (of course) also the inflated layout stays always fixed, while not

问题 I can perfectly manage orientation change programatically, by using setRequestedOrientation in onCreate . Everything works really fine, until I plug a HDMI cable. After this, the tablet "wants" to be in landscape mode. So when I open an activity, it shows first in "landscape" and then right after it shows in "portrait", (because I'm calling setRequestedOrientation(variable_with_orientation_desired_by_the_user) where variable=ActivityInfo.SCREEN_ORIENTATION_PORTRAIT in onCreate As you can "see

问题 Related questions: https://stackoverflow.com/questions/15648713/strange-behaviour-while-screen-lock-in-landscape This is a strange behaviour i got in my Activities. Portrait mode (It's normal) Press screen lock, Activity: onPause() ; Unlock the screen, Activity: onResume() . Landscape mode (It's strange) Press screen lock, Activity: onPause() -> onStop() -> onDestroy() -> onCreate() -> onStart() -> onResume() which loads the Portrait layout; Unlock the screen, Activity: onPause() -> onStop()

问题 I have to develop an one android application. I have created one alert dialog.If i have to rotate the orientation means that alert dialog is disappears. But i wish to display the alert dialog when orientation changes. @Override public void onConfigurationChanged ( Configuration newConfig ) { super.onConfigurationChanged(newConfig); try { MainActivity.editCalled = true; Intent in = new Intent(AndroidListFragmentActivity.this, AndroidListFragmentActivity.class); startActivity(in); finish(); }

问题 Based on my previous question of "How to create a BottomBar as StickyBottomCaptureLayout in camera2 Android api?", I created a layout with a StickyBar (SB) which is always locked above/near the system bar. I set the default positions and coordinates of the SB and the other layout in onLayout() (exactly as my answer). The upper layout is a simple custom DrawView which has an ArrayList of Path s drew by the user. When the device rotates, it recalls onDraw() and calls several times canvas

问题 This question has been asked before here but its answer is incorrect. I would like to rotate some views on screen orientation change, but I want to keep the layout unchanged. They should be rotated 90, 180, 270 or 360 degrees according to the current orientation ( SCREEN_ORIENTATION_LANDSCAPE , SCREEN_ORIENTATION_PORTRAIT , SCREEN_ORIENTATION_REVERSE_LANDSCAPE , SCREEN_ORIENTATION_REVERSE_PORTRAIT ). This is what I want to achieve: The answer in the link I mentioned stated that I should

问题 I have an application in which a login screen shows up whenever an activity goes to onPause state. Generally, when screen orientation changes, the activity goes to onPause state, so I somehow prevented login screen when device is rotated. See the code below, protected void onPause() { super.onPause(); WindowManager mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE); mDisplay = mWindowManager.getDefaultDisplay(); mOrientation = mDisplay.getRotation(); if(mOrientation == 1 ||

问题 I want to change the screen orientation from portrait to landscape and vice versa when the user rotates his Android mobile phone clockwise/anticlockwise. Can anyone help me how to achieve this? I do not know what event is fired when the user rotates his Android mobile phone. For instance, when the user touches the button in UI, touch event is fired. So, when the user shakes his Android mobile phone, what is the event that is fired? Please help me on this. 回答1: Hai, I got Solution with the

问题 I would like to confirm that what I am doing is indeed the correct way as some elements behave unexpected. First, I have a landscape and portrait layout, as I understand, doing this will automatically detect if the phone is in portrait/landscape mode: - layout - activity_video_player.xml - layout-land - activity_video_player.xml Then when the user selects a video from the gallery, I check if the video was taking in landscape or portrait, by doing this (inside OnCreate ): int w; int h;

问题 I am invoking a camera using an intent and clicking a picture. Presently I am on emulator and would like to force camera to click the pictures in portrait mode(need to capture a video of app working,so orientation change would look bad) but the camera screen appears landscape and all the further activities which I invoke in onActivityResult(). After clicking the picture the Activity layout comes out in landscape mode like this: while all my previous activity have displayed correctly in