BaseFragment基类的创建和子类的继承

一、创建基类 BaseFragment

package com.example.zhenghuajing.shoppingmall.base;

import android.content.Context;
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;

/**
 * Created by zhenghuajing on 2019/3/23.
 * BaseFragment
 */

public abstract class BaseFragment extends Fragment {
    public Context mContext;

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

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return initView();
    }

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

    /**
     * 初始化数据
     */
    public void initData() {

    }

    /**
     * 由子类实现，实现特有效果
     * @return
     */
    public abstract View initView();

}　　

二、首页HemoFragment继承基类

package com.example.zhenghuajing.shoppingmall.home.fragment;

import android.graphics.Color;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.widget.TextView;

import com.example.zhenghuajing.shoppingmall.base.BaseFragment;

/**
 * Created by zhenghuajing on 2019/3/23.
 * 首页
 */

public class HomeFragment extends BaseFragment {
    private static final String TAG = HomeFragment.class.getSimpleName();
    private TextView textView;

    @Override
    public View initView() {
        Log.e(TAG, "主页被初始化");
        textView = new TextView(mContext);
        textView.setGravity(Gravity.CENTER);
        textView.setTextSize(25);
        textView.setTextColor(Color.RED);
        return textView;
    }

    @Override
    public void initData() {
        super.initData();
        Log.e(TAG, "主页被初始化了");
        textView.setText("主页");
    }
}