我有一个 fragment ，我需要在其中显示自定义对话框。

请检查下面我的代码。

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错误，则会抛出以下错误:

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)

最佳答案

我已经针对您的情况实现并尝试了许多替代方案，它工作得非常好，所以我没有机会检查您的错误。但我可以建议您将 AppCompatDialog 替换为 AlertDialog.Builder，它是 android.support.v7.app 的一个类。

替换此代码

 public void openDialog(){
      AppCompatDialog dialog = new AppCompatDialog(getContext(), R.style.package_types__dialog);
      dialog.setContentView(R.layout.package_types_dialog);
      dialog.show();
  }

与

   public void openDialog(){    
        AlertDialog.Builder dialog = new AlertDialog.Builder(getContext(),R.style.package_types__dialog);       
        dialog.setView(R.layout.package_types_dialog);   
    }

注意:

如果您有任何处理 dialog 事件的类，则扩展 android.support.v4.app.DialogFragment 的 DialogFragment。并且不要忘记覆盖 onCreateDialog 方法。完整的类看起来像这样

import android.os.Bundle;
import android.support.v4.app.DialogFragment;

/**
 * Created by Shreekrishna on 2/29/2016.
 */
public class PackageTypesDialog extends DialogFragment { 

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return super.onCreateDialog(savedInstanceState);
    }
}

这可能会解决您的问题!

关于android - 在 fragment 中实现对话框时，必须在添加内容之前请求窗口功能，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33239791/