Question

我有DialogFragment我在onCreate（）中创建了alertDialog：

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the Builder class for convenient dialog construction
    if (alertDialog == null) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        alertDialog = builder.create();
        alertDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        alertDialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
        alertDialog.getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL, WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);
        alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH);
    }
    alertDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
    alertDialog.setView(getDialogLayout(),0,0,0,0);
    return alertDialog;
}

然后我在alertDialog中设置onStart()的宽度（dialogWidth）：

    @Override
public void onStart() {
        super.onStart();
        WindowManager.LayoutParams lp = alertDialog.getWindow().getAttributes();
        lp.width = dialogWidth; 
        lp.x = Constants.iX_PositionDialog;
        lp.y = Constants.iY_PositionDialog;
        alertDialog.getWindow().setAttributes(lp);
    }

在我的情况下，我将对话框的宽度设置为648但是我的surfaceView的画布/窗口只有590，为什么？我需要设置的宽度。

Answer 1

在show()的{{1}}方法之后设置布局。

alertDialog

注意：在AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setView(layout); builder.setTitle("Title"); alertDialog = builder.create(); alertDialog.show(); alertDialog.getWindow().setLayout(648, 400); //Controlling width and height.之后设置布局是关键点。

更多信息 - how-to-control-the-width-and-height-of-default-alert-dialog-in-android.

Answer 2

设置警报屏幕的宽度和高度以供使用屏幕：

int dialogWidth = getActivity().getResources().getDisplayMetrics().widthPixels-120; // screen width - whatever the width you want to set.
int dialogHeight = getActivity().getResources().getDisplayMetrics().heightPixels -140; //screen height - whatever the width you want to set.
getDialog().setCanceledOnTouchOutside(false);
Window window = getDialog().getWindow();
WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
lp.gravity = Gravity.CENTER;
lp.height = dialogHeight;
lp.width = dialogWidth;
window.setAttributes(lp);

它是一种最佳实践，因为在andorid中有许多设备和许多分辨率，所以我们必须根据不同的屏幕进行每一次。所以它对所有类型的屏幕都是可行的。

Answer 3

我为自己找到了解决方案。

因此，alertDialog View包含在几个FrameLayouts中。

其中一些的填充不是0.

根据此帮助代码：[AlertDialog with custom view: Resize to wrap the view's content

我使用以下在onStart方法中调用的方法来实现：

protected void forceWrapContent(View v) {
    // Start with the provided view
    View current = v;

    // Travel up the tree until fail, modifying the LayoutParams
    do {
        // Get the parent
        ViewParent parent = current.getParent();    

        // Check if the parent exists
        if (parent != null) {
            // Get the view
            try {
                current = (View) parent;
            } catch (ClassCastException e) {
                // This will happen when at the top view, it cannot be cast to a View
                break;
            }

            // Modify the layout
            current.getLayoutParams().width = dialogWidth;
            current.setPadding(0, 0, 0, 0);

        }
    } while (current.getParent() != null);

    // Request a layout to be re-done
    current.requestLayout();
}

谢谢！

Android自定义AlertDialog更改宽度不准确

3 个答案: