android 添加对话框,android – 在片段中实现对话框时添加内容之前必须请求窗口功能...-优快云博客

本文档展示了在Android应用中创建自定义对话框的代码，并解释了一个常见错误：`Window feature must be requested before adding content`。错误出现的原因是在设置对话框内容视图之前未请求必要的窗口特性。解决此问题的关键在于正确地在对话框初始化阶段请求窗口特性。

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我有一个片段,我需要在其中显示自定义对话框.

请查看下面的代码.

public class MyFragment extends Fragment{

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

}

@Override

public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {

View rootView = inflater.inflate(R.layout.send_layout,container,false);

TextView txtView = (TextView) rootView.findViewById(R.id.tv);

txtView.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

openDialog();

}

});

return rootView;

}

public void openDialog(){

AppCompatDialog dialog = new AppCompatDialog(getContext(),R.style.package_types__dialog);

dialog.setContentView(R.layout.package_types_dialog);

dialog.show();

}

删除行时：

dialog.setContentView(R.layout.package_types_dialog);

没有错误,但如果我使用相同的以下错误抛出：

FATAL EXCEPTION: main

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: Process: in.edelworks.pickedup,PID: 23866

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: android.util.AndroidRuntimeException: Window feature must be requested before adding content

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.throwFeatureRequestIfSubDecorInstalled(AppCompatDelegateImplV7.java:1584)

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.requestWindowFeature(AppCompatDelegateImplV7.java:509)

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplBase.onCreate(AppCompatDelegateImplBase.java:117)

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.onCreate(AppCompatDelegateImplV7.java:148)

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: at android.support.v7.app.AppCompatDialog.onCreate(AppCompatDialog.java:60)

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: at android.app.Dialog.dispatchOnCreate(Dialog.java:361)

10-20 19:42:57.489 23866-23866/in.edelworks.pickedup E/AndroidRuntime: at android.app.Dialog.show(Dialog.java:262)