Android DialogFragment can not be attached to a container view DialogFragment一些优化建议

DialogFragment 是Google官方比较推荐的一种弹框确认交互方式，因为它可以保存生命周期状态，一般我们会extends DialogFragment

 

像下面这种写法

 

 

在onCreateView中初始化视图，然后绑定控件

运行-第一次没问题，有时候点击或者隐藏会抛出一个异常：

java.lang.IllegalStateException: DialogFragment can not be attached to a container view

 

意思就是说这个view 以及被包含添加了，重复添加会报错

Fragment中也有类似的坑，所以，搞懂原理就可以知道如何避免了，

首先判断下根view是否添加：

rootView = super.onCreateView(inflater,container,savedInstanceState);

if (rootView == null)
{
    rootView = inflater.inflate(R.layout.fragment_exit,container,false);
    this.tv_yes = rootView.findViewById(R.id.tv_dialog_yes);
    this.tv_no = rootView.findViewById(R.id.tv_dialog_no);
}

完整代码：

package com.android.angola.wenna.plus.ui.Fragment;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.DialogFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.android.angola.wenna.R;

public class ExitFragment extends DialogFragment
{
    private View rootView;
    private TextView tv_yes;
    private TextView tv_no;
    private OnYesClickListener onYesClickListener;
    private onNoClickListener onNoClickListener;

    public void setOnNoClickListener(ExitFragment.onNoClickListener onNoClickListener) {
        this.onNoClickListener = onNoClickListener;
    }

    public void setOnYesClickListener(OnYesClickListener onYesClickListener) {
        this.onYesClickListener = onYesClickListener;
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        rootView = super.onCreateView(inflater,container,savedInstanceState);
        if (rootView == null)
        {
            rootView = inflater.inflate(R.layout.fragment_exit,container,false);
            this.tv_yes = rootView.findViewById(R.id.tv_dialog_yes);
            this.tv_no = rootView.findViewById(R.id.tv_dialog_no);
        }

        return rootView;
    }

    public interface OnYesClickListener{
        void onYesClickener();
    }

    public interface onNoClickListener{
        void onNoClicked();
    }

    @Override
    public void onResume() {
        super.onResume();
        this.tv_yes.setOnClickListener(v -> onYesClicked());
        this.tv_no.setOnClickListener(v -> onNoClicked());
    }

    private void onNoClicked() {
        if (onNoClickListener != null)
        {
            onNoClickListener.onNoClicked();
        }
    }

    private void onYesClicked() {
        if (onYesClickListener != null)
        {
            onYesClickListener.onYesClickener();
        }
    }
}