我在我的Activity中创建了一个简单的AlertDialog:
View view = layoutInflater.inflate(R.layout.my_dialog, null);
AlertDialog infoDialog = new AlertDialog.Builder(MyActivity.this)
.setView(view)
.create();
infoDialog.show();
通过上述代码，对话框会显示在屏幕的中心位置（大约）。
我想知道，如何自定义对话框的位置，使其显示在顶部操作栏正下方？（有没有什么方法可以更改对话框的重力或其他内容？）并且如何基于我的代码执行此操作？
使用底部菜单：
BottomSheetDialog dialog = new BottomSheetDialog(YourActivity.this);
dialog.setContentView(YourView);
dialog.show();
dialog.getWindow().getAttributes().gravity = Gravity.BOTTOM;
public class MyDialogFragment extends DialogFragment{
protected void setDialogGravity(int gravity) {
Dialog dialog = getDialog();
if (dialog != null) {
Window window = dialog.getWindow();
if (window != null) {
WindowManager.LayoutParams params = window.getAttributes();
params.width = WindowManager.LayoutParams.MATCH_PARENT;
params.height = WindowManager.LayoutParams.MATCH_PARENT;
params.horizontalMargin = 0;
params.gravity = gravity;
params.dimAmount = 0;
params.flags &= ~WindowManager.LayoutParams.FLAG_DIM_BEHIND;
window.setAttributes(params);
}
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater,container,savedInstanceState);
return inflater.inflate(R.layout.my_dialog, null);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setDialogGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL);
}
}
i use this method
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Dialog dialog = new Dialog(getActivity());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
Window window = dialog.getWindow();
WindowManager.LayoutParams wlp = window.getAttributes();
wlp.gravity = Gravity.BOTTOM;
dialog.setContentView(R.layout.dialog_droppoint);
dialog.show();
window.setAttributes(wlp);
return dialog;
}
onViewCreated方法中添加此行。dialog?.window?.attributes?.gravity = Gravity.BOTTOM
你可以使用任何重力值。
。
WindowManager.LayoutParams lp = this.getWindow().getAttributes();
lp.gravity = Gravity.BOTTOM;
取消和一个保存按钮，还可以在设备屏幕上设置重力（底部），并定义对话框的宽度和高度。
private void showDialog(final String scanContent, final String currentTime, final String currentDate) {
LayoutInflater linf = LayoutInflater.from(this);
final View inflator = linf.inflate(R.layout.dialog_barcode_result_dialog, null);final Dialog dialog = new Dialog(this, android.R.style.Theme_DeviceDefault_Light_Dialog);
// Setting dialogview
Window window = dialog.getWindow();
window.setGravity(Gravity.BOTTOM);
dialog.getWindow().setLayout(375, 350);
window.setLayout(WindowManager.LayoutParams.FILL_PARENT, WindowManager.LayoutParams.FILL_PARENT);
dialog.setTitle(null);
dialog.setContentView(R.layout.dialog_barcode_result_dialog);
dialog.setTitle(getResources().getString(R.string.dialog_title));
dialog.setContentView(inflator);
final Button save = inflator.findViewById(R.id.saveBtn);
final Button cancel = inflator.findViewById(R.id.cancelBtn);
final TextView message = inflator.findViewById(R.id.dialog_message_text);
message.setText(scanContent);
save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dialog.cancel();
}
});
cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dialog.cancel();
}
});
dialog.show();
}
对话框布局的XML文件如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:minWidth="350dp"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:textSize="16sp"
android:layout_marginBottom="10dp"
android:id="@+id/dialog_message_text"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="right"
android:orientation="horizontal">
<Button
android:id="@+id/cancelBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/cancel" />
<Button
android:id="@+id/saveBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_save" />
</LinearLayout>
</LinearLayout>
</ScrollView>
</LinearLayout>
人工智能Shakil建议的Kotlin代码的Java版本：
AlertDialog dialog = new AlertDialog.Builder(MainActivity.this)
.setView(v)
.setCancelable(false).create();
dialog.getWindow().setGravity(Gravity.TOP);
dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
dialog.show();