BaseFragment.java

package com.llf.basemodel.base;

import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.llf.basemodel.R;
import com.llf.basemodel.dialog.DialogTools;
import com.llf.basemodel.utils.ToastUtil;

import butterknife.ButterKnife;
import rx.Subscription;
import rx.subscriptions.CompositeSubscription;

/**
 * Created by llf on 2017/3/1.
 * 基础的Fragment
 */

public abstract class BaseFragment extends Fragment {
    private boolean isViewPrepared; // 标识fragment视图已经初始化完毕
    private boolean hasFetchData; // 标识已经触发过懒加载数据
    private CompositeSubscription mSubscriptions;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View rootView = inflater.inflate(getLayoutId(), container, false);
        ButterKnife.bind(this, rootView);
        this.initView();
        isViewPrepared = true;
        return rootView;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        lazyFetchDataIfPrepared();
    }

    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);

        lazyFetchDataIfPrepared();
    }

    private void lazyFetchDataIfPrepared() {
        if (isViewPrepared && getUserVisibleHint() && !hasFetchData) {
            lazyFetchData();
            hasFetchData = true;
        }
    }

    @Override
    public void onStart() {
        super.onStart();
    }

    @Override
    public void onResume() {
        super.onResume();
    }

    @Override
    public void onPause() {
        super.onPause();
    }

    @Override
    public void onStop() {
        super.onStop();
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        ButterKnife.unbind(this);
        hasFetchData = false;
        isViewPrepared = false;
        if (mSubscriptions != null) {
            mSubscriptions.clear();
        }
        BaseApplication.getRefWatcher(getActivity()).watch(this);
    }

    @Override
    public void onDetach() {
        super.onDetach();
    }

    /**
     * 通过Class跳转界面
     **/
    public void startActivity(Class<?> cls) {
        startActivity(cls, null);
    }

    /**
     * 含有Bundle通过Class跳转界面
     **/
    public void startActivity(Class<?> cls, Bundle bundle) {
        Intent intent = new Intent(getActivity(), cls);
        if (bundle != null) {
            intent.putExtras(bundle);
        }
        startActivity(intent);
    }

    /**
     * 通过Class跳转界面
     **/
    public void startActivityForResult(Class<?> cls, int requestCode) {
        startActivityForResult(cls, null, requestCode);
    }

    /**
     * 含有Bundle通过Class跳转界面
     **/
    public void startActivityForResult(Class<?> cls, Bundle bundle, int requestCode) {
        Intent intent = new Intent(getActivity(), cls);
        if (bundle != null) {
            intent.putExtras(bundle);
        }
        startActivityForResult(intent, requestCode);
    }

    /**
     * 跳转界面并关闭当前界面
     *
     * @param clazz 目标Activity
     */
    protected void startThenKill(Class<?> clazz) {
        startThenKill(clazz, null);
    }

    /**
     * @param clazz  目标Activity
     * @param bundle 数据
     */
    protected void startThenKill(Class<?> clazz, Bundle bundle) {
        startActivity(clazz, bundle);
        getActivity().finish();
    }
    /**
     * 开启加载效果
     */
    public void startProgressDialog() {
        DialogTools.showWaittingDialog(getActivity());
    }

    /**
     * 关闭加载
     */
    public void stopProgressDialog() {
        DialogTools.closeWaittingDialog();
    }

    /**
     * 显示错误的dialog
     */
    public void showErrorHint(String errorContent) {
        View errorView = LayoutInflater.from(getActivity()).inflate(R.layout.app_error_tip,null);
        TextView tvContent = (TextView)errorView.findViewById(R.id.content);
        tvContent.setText(errorContent);
        new ToastUtil(errorView);
    }

    /**
     * 显示普通的toast
     *
     * @return
     */
    public void showToast(String str) {
        ToastUtil.sToastUtil.shortDuration(str).setToastBackground(Color.WHITE, R.drawable.toast_radius).show();
    }

    protected void addSubscription(Subscription subscription) {
        if (subscription == null) return;
        if (mSubscriptions == null) {
            mSubscriptions = new CompositeSubscription();
        }
        mSubscriptions.add(subscription);
    }

    protected abstract int getLayoutId();
    protected abstract void initView();
    protected abstract void lazyFetchData();
}