android懒加载demo

public class BaseFragment extends Fragment {
protected LayoutInflater inflater;
private View contentView;
protected Context mContext;
private ViewGroup container;
protected String TAG = this.getClass().getName();
protected Handler mHandler = new Handler();

public BaseFragment() {
}

protected void le(String msg) {
    L.e(this.TAG, new Object[]{msg});
}

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.mContext = this.getActivity();
}

public final View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    this.inflater = inflater;
    this.container = container;
    this.onCreateView(savedInstanceState);
    return this.contentView == null?super.onCreateView(inflater, container, savedInstanceState):this.contentView;
}

protected void onCreateView(Bundle savedInstanceState) {
}

protected void delayClick(final View view) {
    view.setEnabled(false);
    this.mHandler.postDelayed(new Runnable() {
        public void run() {
            if(view != null) {
                view.setEnabled(true);
            }

        }
    }, BaseApplication.getInstance().getDefaultClickDelayTime());
}

protected void delayClick(final View view, long time) {
    view.setEnabled(false);
    this.mHandler.postDelayed(new Runnable() {
        public void run() {
            if(view != null) {
                view.setEnabled(true);
            }

        }
    }, time);
}

public void onDestroyView() {
    NetRequest.getRequestQueue().cancelAll(NetRequest.getDefaultTag(this));
    this.mHandler.removeCallbacksAndMessages((Object)null);
    super.onDestroyView();
    this.contentView = null;
    this.container = null;
    this.inflater = null;
}

public Context getApplicationContext() {
    return this.mContext.getApplicationContext();
}

public void setContentView(int layoutResID) {
    this.setContentView((ViewGroup)this.inflater.inflate(layoutResID, this.container, false));
}

public void setContentView(View view) {
    this.contentView = view;
}

public View getContentView() {
    return this.contentView;
}

public View findViewById(int id) {
    return this.contentView != null?this.contentView.findViewById(id):null;
}

public void onDetach() {
    super.onDetach();

    try {
        Field childFragmentManager = Fragment.class.getDeclaredField("mChildFragmentManager");
        childFragmentManager.setAccessible(true);
        childFragmentManager.set(this, (Object)null);
    } catch (NoSuchFieldException var2) {
        throw new RuntimeException(var2);
    } catch (IllegalAccessException var3) {
        throw new RuntimeException(var3);
    }
}

}

public class LazyFragment extends BaseFragment {
private boolean isInit = false;
private Bundle savedInstanceState;
public static final String INTENT_BOOLEAN_LAZYLOAD = "intent_boolean_lazyLoad";
private boolean isLazyLoad = true;
private FrameLayout layout;
protected String TAG = this.getClass().getName();
private boolean isStart = false;

public LazyFragment() {
}

protected void le(String msg) {
    L.e(this.TAG, new Object[]{msg});
}

/** @deprecated */
@Deprecated
protected final void onCreateView(Bundle savedInstanceState) {
    super.onCreateView(savedInstanceState);
    Bundle bundle = this.getArguments();
    if(bundle != null) {
        this.isLazyLoad = bundle.getBoolean("intent_boolean_lazyLoad", this.isLazyLoad);
    }

    if(this.isLazyLoad) {
        if(this.getUserVisibleHint() && !this.isInit) {
            this.isInit = true;
            this.savedInstanceState = savedInstanceState;
            this.onCreateViewLazy(savedInstanceState);
        } else {
            this.layout = new FrameLayout(this.getApplicationContext());
            this.layout.setLayoutParams(new LayoutParams(-1, -1));
            super.setContentView(this.layout);
        }
    } else {
        this.isInit = true;
        this.onCreateViewLazy(savedInstanceState);
    }

}

public void setUserVisibleHint(boolean isVisibleToUser) {
    super.setUserVisibleHint(isVisibleToUser);
    if(isVisibleToUser && !this.isInit && this.getContentView() != null) {
        this.isInit = true;
        this.onCreateViewLazy(this.savedInstanceState);
        this.onResumeLazy();
    }

    if(this.isInit && this.getContentView() != null) {
        if(isVisibleToUser) {
            this.isStart = true;
            this.onFragmentStartLazy();
        } else {
            this.isStart = false;
            this.onFragmentStopLazy();
        }
    }

}

/** @deprecated */
@Deprecated
public final void onStart() {
    super.onStart();
    if(this.isInit && !this.isStart && this.getUserVisibleHint()) {
        this.isStart = true;
        this.onFragmentStartLazy();
    }

}

/** @deprecated */
@Deprecated
public final void onStop() {
    super.onStop();
    if(this.isInit && this.isStart && this.getUserVisibleHint()) {
        this.isStart = false;
        this.onFragmentStopLazy();
    }

}

protected void onFragmentStartLazy() {
}

protected void onFragmentStopLazy() {
}

protected void onCreateViewLazy(Bundle savedInstanceState) {
}

protected void onResumeLazy() {
}

protected void onPauseLazy() {
}

protected void onDestroyViewLazy() {
}

public void setContentView(int layoutResID) {
    if(this.isLazyLoad && this.getContentView() != null && this.getContentView().getParent() != null) {
        this.layout.removeAllViews();
        View view = this.inflater.inflate(layoutResID, this.layout, false);
        this.layout.addView(view);
    } else {
        super.setContentView(layoutResID);
    }

}

public void setContentView(View view) {
    if(this.isLazyLoad && this.getContentView() != null && this.getContentView().getParent() != null) {
        this.layout.removeAllViews();
        this.layout.addView(view);
    } else {
        super.setContentView(view);
    }

}

/** @deprecated */
@Deprecated
public final void onResume() {
    super.onResume();
    if(this.isInit) {
        this.onResumeLazy();
    }

}

/** @deprecated */
@Deprecated
public final void onPause() {
    super.onPause();
    if(this.isInit) {
        this.onPauseLazy();
    }

}

/** @deprecated */
@Deprecated
public final void onDestroyView() {
    super.onDestroyView();
    if(this.isInit) {
        this.onDestroyViewLazy();
    }

    this.isInit = false;
}

public void onDestroy() {
    super.onDestroy();
}

}

public class AutoLazyFragment extends LazyFragment {
Unbinder unbinder;
@Override
public void setContentView(View view) {
    super.setContentView(view);
    unbinder = ButterKnife.bind(this, view);
}

@Override
public void setContentView(int layoutResID) {
    super.setContentView(layoutResID);
    unbinder = ButterKnife.bind(this, getContentView());
}

@Override
protected void onDestroyViewLazy() {
    super.onDestroyViewLazy();
    if(unbinder!=null){
        unbinder.unbind();
    }
}

}

直接在自己的fragment里继承AutoLazyFragment可实现懒加载