请提出解决方案。
当我旋转我的片段时,它应该变为横向模式并显示另一个布局。但屏幕并没有旋转到横向。
我的代码破解:
<activity
android:name=".activites.MainActivity"
android:launchMode="singleInstance"
android:configChanges="keyboardHidden|screenLayout|screenSize|orientation"
/>
这是被称为仪表板的主要布局,现在它处于纵向模式:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view=View.inflate(getContext(), R.frag_dashboard,null);
changeview= (ShimmerTextView)view.findViewById(R.id.changeview);
return view;
}
当我旋转屏幕时,这个片段变为横向模式并设置另一个布局,而praye_times是新的布局。
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Checks the orientation of the screen
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
Toast.makeText(getContext(), "landscape", Toast.LENGTH_SHORT).show();
view=View.inflate(getContext(), R.layout.prayer_times,null);
}
}
并且我为praye_times 创建layout_land
如果您的片段在方向改变时没有重新加载的问题,您可以简单地重新加载。
在layout
和layout-land
文件夹中添加两个同名布局。
这将在加载时显示正确的定向布局,以便在设备旋转时更改布局在片段本身内部的onConfigarationChanged方法中添加以下内容。
@Override
public void onConfigurationChanged(Configuration newConfig){
super.onConfigurationChanged(newConfig);
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE || newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
try {
FragmentTransaction ft = getFragmentManager().beginTransaction();
if (Build.VERSION.SDK_INT >= 26) {
ft.setReorderingAllowed(false);
}
ft.detach(this).attach(this).commit();
} catch (Exception e) {
e.printStackTrace();
}
}
}
如果在旋转屏幕时调用onCreateView
函数,则可以在其中执行以下操作:
if(this.getResources().getConfiguration().orientation==Configuration.ORIENTATION_LANDSCAPE) {
......
} else if(this.getResources().getConfiguration().orientation==Configuration.ORIENTATION_PORTRAIT) {
.........
}
迟到了,但这将有助于某些
在V4片段中尝试此操作
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if (getFragmentManager() != null) {
getFragmentManager()
.beginTransaction()
.detach(this)
.attach(this)
.commit();
}
}
您要做的事情相当复杂。安卓碎片并不意味着要轮换。不过,我也遇到了同样的问题,并找到了解决方案。在我的例子中,我想呈现一个包含不同菜单页面的片段,这些页面将根据方向旋转。
只需创建一个Fragment作为基础,并包含一个简单的LinearLayout(或您想要的任何其他布局类型)。此LinearLayout将作为我们菜单的画布:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/llMenuCanvas"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>
接下来,我们想将基本项片段编码为一个抽象类,它将由所有菜单项片段实现:
public abstract class NavMenuItem extends Fragment {
static final String TAG = "yourTag"; // Debug tag
LinearLayout canvas;
View hView; // we'll keep the reference of both views
View vView;
// All we'll need to do is set these up on our fragments
abstract int getVerticalLayoutResource();
abstract int getHorizontalLayoutResource();
abstract void setupUI(); // assigns all UI elements and listeners
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.menu_base, container, false); // sets up the layout for this fragment
// keeping our references to both layout versions
hView = inflater.inflate(getHorizontalLayoutResource(), container, false);
vView = inflater.inflate(getVerticalLayoutResource(), container, false);
canvas = view.findViewById(R.id.llMenuCanvas); // this is the magic part: Our reference to the menu canvas
// returning our first view depending on orientation
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE){
canvas.addView(hView);
}else{
canvas.addView(vView);
}
return view;
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setupUI(); // here we set up our listeners for the first time
}
// Here we update the layout when we rotate the device
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
canvas.removeAllViews();
// Checking screen orientation
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
canvas.addView(hView);
}
else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
canvas.addView(vView);
}
setupUI(); // we always need to rebind our buttons
}
}
这里是一个菜单项片段的例子,它根据设备的方向旋转。
public class NavMenuMain extends NavMenuItem{
static final String TAG = "yourTag"; // Debug tag
// Your layout references, as usual
ImageButton btnCloseMenu;
// here we set up the layout resources for this fragment
@Override
int getVerticalLayoutResource() { // vertical layout version
return R.layout.menu_main_port;
}
@Override
int getHorizontalLayoutResource() { // horizontal layout version
return R.layout.menu_main_land;
}
@Override
void setupUI(){
// Setup button listeners and layout interaction here
// REMEMBER: the names of your layout elements must match, both for landscape and portrait layouts. Ex: the "close menu" button must have the same id name in both layout versions
}
}
希望能有所帮助。
您所需要做的就是在res
文件夹中打开一个新的layout-land
文件夹,并将具有与片段布局相同名称的xml放在那里,框架就会知道要在方向更改时查找该.xml
。查看此处了解详细信息。
默认情况下,/res/layout中的布局同时应用于纵向和横向
例如,如果您有
/res/layout/main.xml
您可以添加一个新的文件夹/res/layout land,将main.xml复制到其中并进行必要的调整
另请参阅http://www.androidpeople.com/android-portrait-amp-landscape-differeent-layouts和http://www.devx.com/wireless/Article/40792/1954了解更多选项。
当您更改方向时,您的碎片会被销毁并重新创建(请参阅此以更好地理解)。因此,在onConfigurationChanged中,您膨胀了新布局,但这是无用的,因为当您的片段重新创建时,onCreateView会被再次调用;换句话说,你的旧布局又膨胀了。所以最好这样做:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view;
if(getActivity().getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
view = View.inflate(getContext(), R.frag_dashboard,null);
changeview = (ShimmerTextView)view.findViewById(R.id.changeview);
} else(getActivity().getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
Toast.makeText(getContext(), "landscape", Toast.LENGTH_SHORT).show();
view = View.inflate(getContext(), R.layout.prayer_times,null);
}
return view;
}