基類
package com.example.darker.moniti;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;

public abstract class BaseActivity extends AppCompatActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        prieviewAction();
        setContentView(getContentView());
        initView();
        initData();
        setLinstener();
        setMroeAction();
    }



    protected  void prieviewAction(){

    };

    protected abstract void initView();

    protected abstract int getContentView();

    protected void initData(){};
    protected  void setLinstener(){};
    protected void setMroeAction() {
    }
}

繼承基類  

public class MainActivity extends BaseActivity {
 //兩個方法 aly+enter
 //獲取id
 protected abstract void initView(); 
  //介面
  protected abstract int getContentView();

  
}