android 片段中显示alertdialog 的问题
我遵循了 android 示例，但出现了一个不全面的错误：
void showDialog() {
DialogFragment newFragment = MyAlertDialogFragment.newInstance();
newFragment.show(fm, "alert");
}
public static class MyAlertDialogFragment extends DialogFragment {
public static MyAlertDialogFragment newInstance() {
MyAlertDialogFragment frag = new MyAlertDialogFragment();
return frag;
}
public Dialog onCreateDialog(Bundle savedInstanceState) {
return new AlertDialog.Builder(getActivity()).setTitle("test")
.setMessage("bla bla bla").create();
}
}
newFragment.show(fm, "alert"); 返回一个错误：
DialogFragment 类型中的方法 show(FragmentManager, String) 是 不适用于参数（FragmentManager、String）
有人可以帮助我吗？
I have followed android example but I have an incomprehensive error :
void showDialog() {
DialogFragment newFragment = MyAlertDialogFragment.newInstance();
newFragment.show(fm, "alert");
}
public static class MyAlertDialogFragment extends DialogFragment {
public static MyAlertDialogFragment newInstance() {
MyAlertDialogFragment frag = new MyAlertDialogFragment();
return frag;
}
public Dialog onCreateDialog(Bundle savedInstanceState) {
return new AlertDialog.Builder(getActivity()).setTitle("test")
.setMessage("bla bla bla").create();
}
}
newFragment.show(fm, "alert"); returns me an error :
The method show(FragmentManager, String) in the type DialogFragment is
not applicable for the arguments (FragmentManager, String)
Someone could help me ?
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评论（3）
问题是因为您需要使用支持包的
FragmentManager，但当您调用getFragmentManager()时，您正在使用本机FragmentManager。尝试在初始化变量fm时调用getSupportFragmentManager()。The problem is because you need to be using the support package's
FragmentManagerbut you are using the nativeFragmentManagerwhen you callgetFragmentManager(). Try callinggetSupportFragmentManager()when initializing your variablefm.实际上，在按照 @Jacob 所说的操作之后，您还必须确保包含支持包中的 DialogFragment，而不是本机包中的 DialogFragment。
您可以通过导入来做到这一点，
Actually after you do as @Jacob says, you also have to make sure that you include DialogFragment from the Support package and not from the native package.
You can do that by importing,
就我而言，我的
minSDK设置为14，因此我不想使用支持包。我的问题是我导入了错误的DialogFragment，如下所示：我将其更改为这样并且它有效：
In my case my
minSDKis set to14so I did not want to use the support package. My problem was I was importing the wrongDialogFragmentlike so:I changed it to this and it worked: