2-AVI--Fragment生命周期测试

零、前言

[1].两个Fragment，点击左右按钮切换相应的Fragment
[2].观察Activity 和两个Fragment生命周期变化
[3].布局很简单，挺多的，就不贴了，会给图

具体情况如图：

Fragment生命周期.png

布局：

fragment生命周期布局.gif

LifeOfFgActivity

public class LifeOfFgActivity extends AppCompatActivity {
    private static final String TAG = "LifeOfFgActivity";
    @BindView(R.id.btn_left)
    Button mTvTitle1;
    @BindView(R.id.btn_right)
    Button mTvTitle2;
    @BindView(R.id.ll_life_root)
    LinearLayout mLlLifeRoot;
    @BindView(R.id.fl_life_root)
    FrameLayout mFlLifeRoot;
    private FragmentManager mFm;
    private FragmentTransaction mFt;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_life);
        Log.e(TAG, "onCreate: &&&&&&LifeOfFgActivity");
        ButterKnife.bind(this);
        initFragment();//初始Fragment
    }

    @Override
    protected void onStart() {
        super.onStart();
        Log.e(TAG, "onStart: &&&&&&LifeOfFgActivity");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.e(TAG, "onResume: &&&&&&LifeOfFgActivity");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.e(TAG, "onPause: &&&&&&LifeOfFgActivity");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.e(TAG, "onStop: &&&&&&LifeOfFgActivity");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.e(TAG, "onRestart: &&&&&&LifeOfFgActivity");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.e(TAG, "onDestroy: &&&&&&LifeOfFgActivity");
    }

    private void initFragment() {
        mFm = getFragmentManager();//1.获取FragmentManager
        mFt = mFm.beginTransaction();//2.fm开启事务
        mFt.add(R.id.fl_life_root, new Fragment1()); //3.动态添加
        mFt.commit();//4.提交事务
    }

    @OnClick({R.id.btn_left, R.id.btn_right})
    public void onViewClicked(View view) {
        mFt = mFm.beginTransaction();//2.fm开启事务
        switch (view.getId()) {
            case R.id.btn_left:
                mFlLifeRoot.removeAllViews();//先清屏
                mFt.replace(R.id.fl_life_root, new Fragment1()); //3.动态添加
                break;
            case R.id.btn_right:
                mFlLifeRoot.removeAllViews();//先清屏
                mFt.replace(R.id.fl_life_root, new Fragment2()); //3.动态添加
                break;
        }
        mFt.commit();//4.提交事务
    }
}

Fragment1

public class Fragment1 extends Fragment {
    private static final String TAG = "Fragment1";
    

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        Log.e(TAG, "onAttach: ====Fragment1");
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.e(TAG, "onCreate: ====Fragment1");
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        Log.e(TAG, "onCreateView:====Fragment1 ");
        return inflater.inflate(R.layout.fragment_fragment1, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Log.e(TAG, "onActivityCreated:====Fragment1 ");
    }

    @Override
    public void onStart() {
        super.onStart();
        Log.e(TAG, "onStart: ====Fragment1");
    }

    @Override
    public void onResume() {
        super.onResume();
        Log.e(TAG, "onResume:====Fragment1 ");
    }

    @Override
    public void onPause() {
        super.onPause();
        Log.e(TAG, "onPause:====Fragment1 ");
    }

    @Override
    public void onStop() {
        super.onStop();
        Log.e(TAG, "onStop: ====Fragment1");
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        Log.e(TAG, "onDestroyView: ====Fragment1");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.e(TAG, "onDestroy:====Fragment1 ");
    }

    @Override
    public void onDetach() {
        super.onDetach();
        Log.e(TAG, "onDetach:====Fragment1 ");
    }
}

Fragment2

public class Fragment2 extends Fragment {
    private static final String TAG = "Fragment2";


    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        Log.e(TAG, "onAttach: >>>>>Fragment2");
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.e(TAG, "onCreate: >>>>>Fragment2");
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        Log.e(TAG, "onCreateView:>>>>>Fragment2 ");
        return inflater.inflate(R.layout.fragment_fragment2, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Log.e(TAG, "onActivityCreated:>>>>>Fragment2 ");
    }

    @Override
    public void onStart() {
        super.onStart();
        Log.e(TAG, "onStart: >>>>>Fragment2");
    }

    @Override
    public void onResume() {
        super.onResume();
        Log.e(TAG, "onResume:>>>>>Fragment2 ");
    }

    @Override
    public void onPause() {
        super.onPause();
        Log.e(TAG, "onPause:>>>>>Fragment2 ");
    }

    @Override
    public void onStop() {
        super.onStop();
        Log.e(TAG, "onStop: >>>>>Fragment2");
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        Log.e(TAG, "onDestroyView: >>>>>Fragment2");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.e(TAG, "onDestroy:>>>>>Fragment2 ");
    }

    @Override
    public void onDetach() {
        super.onDetach();
        Log.e(TAG, "onDetach:>>>>>Fragment2 ");
    }
}

---

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