Activity, Fragment のライフサイクルを確認するクラスを作った


# はじめに
Activity, Fragment のライフサイクルを確認できる便利クラスがあったらいいなと思ったので、ざっと作ってみました。

こんな感じで動きを追うことができます。Activity, Fragment, Bundle については、インスタンスを区別できるよう ID を付けています。

![screenshot.png](https://qiita-image-store.s3.amazonaws.com/0/39324/a2a68d6d-8aab-259c-f5bd-6376ededdac2.png "screenshot.png")



Github にもサンプルプロジェクトをアップしました。
https://github.com/suzukihr/AndroidLifecycleTest

主要なメソッドはだいたい含まれているかなと思っています。


# コード
こんな感じです。プロジェクトで使用する場合は、ログを確認したい Activity, Fragment でそれぞれ、LifecycleActivity, LifecycleFragment を継承して、onCreate, onAttach 内で

> setTag(getClass().getSimpleName(), this);

を呼べば OK です。メソッドを Override している場合、super をコールしていないとログは出ません。

```java:LifeCycleActivity
public class LifeCycleActivity extends Activity {

    private String TAG = "*** LifeCycleActivity: TAG is not set ***";

    public void setTag(String tag, Object object) {
        this.TAG = "*** " + tag + "@" + Integer.toHexString(System.identityHashCode(object))+ " ***";
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.d("********************", getClass().getSimpleName() + " start ﹕********************");
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName+ " (savedInstanceState: " + getBundleInfo(savedInstanceState) + ")");
        super.onCreate(savedInstanceState);
    }

    @Override
    protected void onStart() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onStart();
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName + " (savedInstanceState: " + getBundleInfo(savedInstanceState) + ")");
        super.onRestoreInstanceState(savedInstanceState);
    }

    @Override
    protected void onResume() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onResume();
    }

    @Override
    public void onAttachedToWindow() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onAttachedToWindow();
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onWindowFocusChanged(hasFocus);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        return true;
    }

    // called when setting 'android:configChanges="orientation|screenSize"' in your manifest
    // http://developer.android.com/guide/topics/resources/runtime-changes.html#HandlingTheChange
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onConfigurationChanged(newConfig);
    }

    @Override
    protected void onPause() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onPause();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName + " (outState: " + getBundleInfo(outState) + ")");
        super.onSaveInstanceState(outState);
    }

    @Override
    protected void onStop() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onStop();
    }

    @Override
    protected void onDestroy() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onDestroy();
    }

    @Override
    public void onDetachedFromWindow() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onDetachedFromWindow();
    }

    private static String getBundleInfo(Bundle bundle) {
        String info = bundle == null
                ? "null"
                : "Bundle@" + Integer.toHexString(System.identityHashCode(bundle));
        return info;
    }
}
```










```java:LifeCycleFragment
public class LifeCycleFragment extends Fragment {

    private String TAG = "*** LifeCycleFragment: TAG is not set ***";

    public void setTag(String tag, Object object) {
        this.TAG = "*** " + tag + "@" + Integer.toHexString(System.identityHashCode(object))+ " ***";
    }

    @Override
    public void onAttach(Activity activity) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onAttach(activity);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName + " (savedInstanceState: " + getBundleInfo(savedInstanceState) + ")");
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName + " (savedInstanceState: " + getBundleInfo(savedInstanceState) + ")");
        return super.onCreateView(inflater, container, savedInstanceState);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName + " (savedInstanceState: " + getBundleInfo(savedInstanceState) + ")");
        super.onViewCreated(view, savedInstanceState);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName + " (savedInstanceState: " + getBundleInfo(savedInstanceState) + ")");
        super.onActivityCreated(savedInstanceState);
    }

    @Override
    public void onStart() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onStart();
    }

    @Override
    public void onResume() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onResume();
    }

    // called when setting 'android:configChanges="orientation|screenSize"' in you manifest
    // http://developer.android.com/guide/topics/resources/runtime-changes.html#HandlingTheChange
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onConfigurationChanged(newConfig);
    }

    // called when calling 'setHasOptionsMenu(true)'
    // http://developer.android.com/reference/android/app/Fragment.html#setHasOptionsMenu(boolean)
    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onCreateOptionsMenu(menu, inflater);
    }

    @Override
    public void onPause() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onPause();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName + " (outState: " + getBundleInfo(outState) + ")");
        super.onSaveInstanceState(outState);
    }

    @Override
    public void onStop() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onStop();
    }

    @Override
    public void onDestroyView() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onDestroyView();
    }

    @Override
    public void onDestroy() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onDestroy();
    }

    @Override
    public void onDetach() {
        String methodName = new Object(){}.getClass().getEnclosingMethod().getName();
        Log.d(TAG, methodName);
        super.onDetach();
    }

    private static String getBundleInfo(Bundle bundle) {
        String info = bundle == null
                ? "null"
                : "Bundle@" + Integer.toHexString(System.identityHashCode(bundle));
        return info;
    }
}
```