4
我的問題類似於Full Screen DialogFragment in Android，但是這個問題並沒有完全解決我的問題。Android DialogFragment自動調整大小
我有一個DialogFragment，我想設置最大尺寸，並自動調整大小，如果DialogFragment延伸超過顯示的範圍。這似乎是應該被烘焙到操作系統中的東西，但我已經能夠提出的唯一解決方案是輪詢顯示尺寸，並在尺寸超出顯示範圍時手動調整尺寸。
在DialogFragment的onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)：
// Display the first screen
m_rootView = inflater.inflate(R.layout.fragment_popup, container, false);
// Readjust the size of the dialog fragment if it is too large for the display
Globals.AdjustSizeOfDialogFragment(getActivity(), container);
調整大小代碼Globals.java：
// Adjusts the size of a dialog fragment's popup view to ensure that it fits within the display of the current device
public static void AdjustSizeOfDialogFragment(final Activity parentActivity, final View popupRoot)
{
// If all of our function parameters are valid
if ((parentActivity != null) && (popupRoot != null))
{
// If the dialog's root view has already rendered (has defined layout parameters)
if (popupRoot.getLayoutParams() != null)
{
// Resize the dialog now
ResizeDialogFragment(parentActivity, popupRoot);
}
// Else the view has not finished rendering yet
else
{
// Assign a listener to notify us when it has finished rendering
popupRoot.addOnLayoutChangeListener(new OnLayoutChangeListener()
{
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom)
{
// Remove the layout listener
v.removeOnLayoutChangeListener(this);
// Now we can render the dialog
ResizeDialogFragment(parentActivity, popupRoot);
}
});
}
}
}
// Does the actual logic/math behind the AdjustSizeOfDialogFragment function
private static void ResizeDialogFragment(Activity parentActivity, View popupRoot)
{
// Retrieves information about the display of the current device
DisplayMetrics deviceDisplayMetrics = new DisplayMetrics();
// Layout parameters that need to be applied to the popup's root view
LinearLayout.LayoutParams llParams = null;
FrameLayout.LayoutParams flParams = null;
// If all of our function parameters are valid
if ((parentActivity != null) && (popupRoot != null) && (popupRoot.getLayoutParams() != null))
{
// Retrieve the layout parameters from the popup's root view and also get information on the current device's display
if (popupRoot.getLayoutParams() instanceof LinearLayout.LayoutParams)
{
llParams = (LinearLayout.LayoutParams) popupRoot.getLayoutParams();
}
else if (popupRoot.getLayoutParams() instanceof FrameLayout.LayoutParams)
{
flParams = (FrameLayout.LayoutParams) popupRoot.getLayoutParams();
}
parentActivity.getWindowManager().getDefaultDisplay().getMetrics(deviceDisplayMetrics);
// If either the height or width of the popup view is greater then the height or width
// of the current display, clip them to approximately 90% of the display's width/height.
if (llParams != null)
{
if (llParams.width > deviceDisplayMetrics.widthPixels)
{
llParams.width = (int) (deviceDisplayMetrics.widthPixels * 0.9);
}
if (llParams.height > deviceDisplayMetrics.heightPixels)
{
llParams.height = (int) (deviceDisplayMetrics.heightPixels * 0.9);
}
}
else if (flParams != null)
{
if (flParams.width > deviceDisplayMetrics.widthPixels)
{
flParams.width = (int) (deviceDisplayMetrics.widthPixels * 0.9);
}
if (flParams.height > deviceDisplayMetrics.heightPixels)
{
flParams.height = (int) (deviceDisplayMetrics.heightPixels * 0.9);
}
}
}
}
的問題是：什麼是真正的Android的方式來做到這一點？這是我唯一的選擇嗎？這似乎是應該構建到操作系統中的東西，但我沒有問過任何人能夠找到它。