【Android】GreenDao 3.X 结合Volley以及Gson、ImageLoader实现数据存储

package com.example.testproject; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.ListView; import android.widget.Toast; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.StringRequest; import com.android.volley.toolbox.Volley; import com.example.testproject.greendao.ProductBean; import com.example.testproject.greendao.gen.ProductBeanDao; import com.example.testproject.util.NetUtil; import com.google.gson.Gson; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private ListView listView; private ProductAdapter adapter; private List<ListProBean> lists; private Button btnRequest; private static final String url = "http://test.xinlechou.com/index.php?r=api/insuranceList"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //初始化控件 iniViews(); getRequestDatas(); //模拟服务端数据 /* String b = "com.example.testproject.SecondActivity"; try { Class c = Class.forName(b); Intent intent = new Intent(MainActivity.this,c); startActivity(intent); }catch (Exception e){ e.printStackTrace(); } */ } private void iniViews() { listView = (ListView) findViewById(R.id.listView); btnRequest = (Button) findViewById(R.id.btn_request); } public void getRequestDatas() { btnRequest.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //数据库，获取DAO final ProductBeanDao dao = MyApplication.getDaoSession(MainActivity.this).getProductBeanDao(); if(NetUtil.isNetConnected(MainActivity.this)){ //volley请求数据 StringRequest request = new StringRequest(url, new Response.Listener<String>() { @Override public void onResponse(String response) { Gson gson = new Gson(); ListProBean bean = gson.fromJson(response,ListProBean.class); if(bean.getError() == 0){ ArrayList<ProductData> datas = bean.getData(); adapter = new ProductAdapter(MainActivity.this,datas); listView.setAdapter(adapter); //将数据保存到greendao数据库 for(int i=0;i<datas.size();i++){ ProductData productData = datas.get(i); ProductBean productBean = new ProductBean(null,null,productData.getName(),productData.getInfo(),Long.parseLong(productData.getId())); //插入数据库 // boolean flag = dao.insert(productBean) != -1 ? true : false; boolean flag = dao.insertOrReplace(productBean) != -1 ? true : false; if(flag){ Log.i("TAG","插入成功："+i); }else{ Log.i("TAG","插入失败："+i); } } } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { //打印错误信息 } }); //将请求放到队列中 MyApplication.getApplication().requestQueue.add(request); }else{ Toast.makeText(MainActivity.this,"没有联网哟",Toast.LENGTH_SHORT).show(); //查数据库 List<ProductBean> lists = dao.queryBuilder().build().list(); if(lists != null && lists.size() > 0){ Toast.makeText(MainActivity.this,"从数据库中读取数据",Toast.LENGTH_SHORT).show(); List<ProductData> productDatas = new ArrayList<ProductData>(); for(int i=0;i<lists.size();i++){ ProductBean productBean = lists.get(i); String title = productBean.getProTitle(); String info = productBean.getProInfo(); ProductData productData = new ProductData(); productData.setName(title); productData.setInfo(info); productDatas.add(productData); } adapter = new ProductAdapter(MainActivity.this,productDatas); listView.setAdapter(adapter); } } } }); } }