Fragment 生命周期

代码：

package com.example.mepositry.fragment;


import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

import com.example.mepositry.FirstActivity;
import com.example.mepositry.R;

public class CommunityFragment extends Fragment {

    public static CommunityFragment newInstance(String info) {
        Bundle args = new Bundle();
        CommunityFragment fragment = new CommunityFragment();
        args.putString("info", info);
        fragment.setArguments(args);
        return fragment;
    }


    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_community, null);
        Button button = view.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getActivity(), FirstActivity.class);
                startActivity(intent);

            }
        });

        Log.e("Fragment","onCreateView");
        return view;
    }


    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        Log.e("Fragment","onAttach");
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.e("Fragment","onCreate");
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Log.e("Fragment","onActivityCreated");
    }

    @Override
    public void onStart() {
        super.onStart();
        Log.e("Fragment","onStart");
    }

    @Override
    public void onResume() {
        super.onResume();
        Log.e("Fragment","onResume");
    }

    @Override
    public void onPause() {
        super.onPause();
        Log.e("Fragment","onPause");
    }

    @Override
    public void onStop() {
        super.onStop();
        Log.e("Fragment","onStop");
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        Log.e("Fragment","onDestroyView");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.e("Fragment","onDestroy");
    }

    @Override
    public void onDetach() {
        super.onDetach();
        Log.e("Fragment","onDetach");
    }



}

 

step1：第一次进来

2021-05-21 15:14:12.698 8344-8344/com.example.mepositry E/Fragment: onAttach
2021-05-21 15:14:12.698 8344-8344/com.example.mepositry E/Fragment: onCreate
2021-05-21 15:14:12.722 8344-8344/com.example.mepositry E/Fragment: onCreateView
2021-05-21 15:14:12.729 8344-8344/com.example.mepositry E/Fragment: onActivityCreated
2021-05-21 15:14:12.729 8344-8344/com.example.mepositry E/Fragment: onStart
2021-05-21 15:14:12.729 8344-8344/com.example.mepositry E/Fragment: onResume

step2:跳转到其他页面

2021-05-21 15:15:08.830 8344-8344/com.example.mepositry E/Fragment: onPause
2021-05-21 15:15:09.494 8344-8344/com.example.mepositry E/Fragment: onStop

step3:按back键，再回来刚才的页面

2021-05-21 15:15:36.390 8344-8344/com.example.mepositry E/Fragment: onStart
2021-05-21 15:15:36.392 8344-8344/com.example.mepositry E/Fragment: onResume

step4:退出

2021-05-21 15:16:02.794 8344-8344/com.example.mepositry E/Fragment: onPause
2021-05-21 15:16:03.352 8344-8344/com.example.mepositry E/Fragment: onStop
2021-05-21 15:16:03.354 8344-8344/com.example.mepositry E/Fragment: onDestroyView
2021-05-21 15:16:03.355 8344-8344/com.example.mepositry E/Fragment: onDestroy
2021-05-21 15:16:03.355 8344-8344/com.example.mepositry E/Fragment: onDetach

 

 按下home键盘和跳转到其他页面，执行的生命周期相同

 

end