历史上的今天App

历史上的今天

意义：通过输入日期获取网络新闻，已经搜索过的直接保存本地

布局搭建

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.lesson13_5_databasecatch.MainActivity">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="horizontal">

<EditText
android:id="@+id/et_date"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="请输入日期 MM-dd" />

<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="请求" />

</LinearLayout>

<ListView
android:id="@+id/lv"
android:layout_width="match_parent"

item布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp">

<TextView
android:id="@+id/tv_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:lines="1"
android:text="标题"
android:textColor="@android:color/black"
android:textSize="18sp" />

<TextView
android:id="@+id/tv_time"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:text="2017-08-24" />

<ImageView
android:id="@+id/pic"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:src="@mipmap/ic_launcher" />
```**Model**

<div class="se-preview-section-delimiter"></div>

package com.example.lesson13_5_databasecatch;

import android.util.Log;

import com.google.gson.Gson;

import java.io.IOException;

import okhttp3.Call;

import okhttp3.Callback;

import okhttp3.FormBody;

import okhttp3.OkHttpClient;

import okhttp3.Request;

import okhttp3.RequestBody;

import okhttp3.Response;

/**

* Created by ASUS on 2017/8/24.

* berlin 2017/08/25

*/

public class Model {

public static final String URL = “http://route.showapi.com/119-42“;

public static final String APPID = "13074";

public static final String SIGN = "ea5b4bf2e140498bb772d1bf2a51a7a0";

public static void getHistoryToday(String date, final BeanCallback callback) {
//加入
OkHttpClient client = new OkHttpClient();
RequestBody body = null;
if (date == null) {
//当天
body = new FormBody.Builder().add("showapi_appid", APPID).add("showapi_sign", SIGN).build();
} else {
//历史数据（date）
body = new FormBody.Builder().add("showapi_appid", APPID).add("showapi_sign", SIGN).add("date", date).build();
}//请求网络
Request request = new Request.Builder().url(URL).post(body).build();
Call call = client.newCall(request);
//异步解析
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e("TAG", "-------网络请求异常");
}

@Override
public void onResponse(Call call, Response response) throws IOException {

// Log.e(“TAG”, “——-” + response.body().string());

Gson gson = new Gson();

//

TodayBean bean = gson.fromJson(response.body().string(), TodayBean.class);

Log.e(“TAG”, “———–” + bean.toString());

**TodayBean**

<div class="se-preview-section-delimiter"></div>

package com.example.lesson13_5_databasecatch;

import java.util.List;

/**

* Created by ASUS on 2017/8/24.

*/

public class TodayBean {

@Override
public String toString() {
return "TodayBean{" +
"showapi_res_body=" + showapi_res_body +
", showapi_res_code=" + showapi_res_code +
", showapi_res_error='" + showapi_res_error + '\'' +
'}';
}

private ShowapiResBodyBean showapi_res_body;
private int showapi_res_code;
private String showapi_res_error;

public ShowapiResBodyBean getShowapi_res_body() {
return showapi_res_body;
}

public void setShowapi_res_body(ShowapiResBodyBean showapi_res_body) {
this.showapi_res_body = showapi_res_body;
}

public int getShowapi_res_code() {
return showapi_res_code;
}

public void setShowapi_res_code(int showapi_res_code) {
this.showapi_res_code = showapi_res_code;
}

public String getShowapi_res_error() {
return showapi_res_error;
}

public void setShowapi_res_error(String showapi_res_error) {
this.showapi_res_error = showapi_res_error;
}

public static class ShowapiResBodyBean {

@Override
public String toString() {
return "ShowapiResBodyBean{" +
"ret_code=" + ret_code +
", list=" + list +
'}';
}

private int ret_code;
private List<ListBean> list;

public int getRet_code() {
return ret_code;
}

public void setRet_code(int ret_code) {
this.ret_code = ret_code;
}

public List<ListBean> getList() {
return list;
}

public void setList(List<ListBean> list) {
this.list = list;
}

public static class ListBean {

@Override
public String toString() {
return "ListBean{" +
"day=" + day +
", img='" + img + '\'' +
", month=" + month +
", title='" + title + '\'' +
", year='" + year + '\'' +
'}';
}

private int day;
private String img;
private int month;
private String title;
private String year;

public int getDay() {
return day;
}

public void setDay(int day) {
this.day = day;
}

public String getImg() {
return img;
}

public void setImg(String img) {
this.img = img;
}

public int getMonth() {
return month;
}

public void setMonth(int month) {
this.month = month;
}

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public String getYear() {
return year;
}

public void setYear(String year) {
this.year = year;
}
}
}

}

**TodayOpenHelper**

<div class="se-preview-section-delimiter"></div>

package com.example.lesson13_5_databasecatch;

import android.content.Context;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

/**

* Created by ASUS on 2017/8/24.

*/

public class TodayOpenHelper extends SQLiteOpenHelper {

public static final String DB_NAME = "databasecatch.db";
public static final String TABLE_NAME = "history";
public static final int VERSION = 1;

public static final String ID = "_id";
public static final String IMG = "_img";
public static final String DAY = "_day";
public static final String MONTH = "_month";
public static final String YEAR = "_year";
public static final String TITLE = "_title";

//create table user()
public static final String CREATE = "create table " + TABLE_NAME + "(" + ID + " integer primary key autoincrement," +
IMG + " text," +
DAY + " integer not null," +
MONTH + " integer not null," +
YEAR + " integer not null," +
TITLE + " text not null" +
");";

public TodayOpenHelper(Context context) {
super(context, DB_NAME, null, VERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
//db?? :(SQLiteDatabase db)
db.execSQL(CREATE);
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}

}

**TodayDAO**

<div class="se-preview-section-delimiter"></div>

import android.util.Log;

import java.util.ArrayList;

import java.util.List;

/**

* Created by ASUS on 2017/8/24.

*/

public class TodayDAO {

TodayOpenHelper helper;

public TodayDAO(Context context) {
helper = new TodayOpenHelper(context);

}

//读
public List<TodayBean.ShowapiResBodyBean.ListBean> queryFormDate(int month, int day) {
SQLiteDatabase readableDatabase = helper.getReadableDatabase();
Cursor query = readableDatabase.query(TodayOpenHelper.TABLE_NAME, null, TodayOpenHelper.MONTH + "=? and " + TodayOpenHelper.DAY + "=?", new String[]{month + "", day + ""}, null, null, null);
List<TodayBe
bcb2
an.ShowapiResBodyBean.ListBean> list = new ArrayList<>();

while (query.moveToNext()) {
String title = query.getString(query.getColumnIndex(TodayOpenHelper.TITLE));
String img = query.getString(query.getColumnIndex(TodayOpenHelper.IMG));
String year = query.getString(query.getColumnIndex(TodayOpenHelper.YEAR));

TodayBean.ShowapiResBodyBean.ListBean bean = new TodayBean.ShowapiResBodyBean.ListBean();
bean.setDay(day);
bean.setImg(img);
bean.setMonth(month);
bean.setYear(year);
bean.setTitle(title);
list.add(bean);
}
readableDatabase.close();
return list;

}

//存
public void addBean(TodayBean.ShowapiResBodyBean.ListBean bean) {
//
SQLiteDatabase readableDatabase = helper.getReadableDatabase();
ContentValues values = new ContentValues();
values.put(TodayOpenHelper.DAY, bean.getDay());
values.put(TodayOpenHelper.MONTH, bean.getMonth());
values.put(TodayOpenHelper.YEAR, bean.getYear());
values.put(TodayOpenHelper.TITLE, bean.getTitle());
if (bean.getImg() != null) {
values.put(TodayOpenHelper.IMG, bean.getImg());
}
readableDatabase.insert(TodayOpenHelper.TABLE_NAME, null, values);
//关闭
readableDatabase.close();
}

public void addBeans(List<TodayBean.ShowapiResBodyBean.ListBean> beans) {
Log.e("TAG", "------------" + beans.toString());
//foreach 遍历bean 目录文件并添加
for (TodayBean.ShowapiResBodyBean.ListBean bean : beans) {
addBean(bean);
}
}

}

**TodayAdapter**

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package com.example.lesson13_5_databasecatch;

import android.content.Context;

import android.text.TextUtils;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.TextView;

import com.bumptech.glide.Glide;

import java.util.List;

import butterknife.BindView;

import butterknife.ButterKnife;

/**

* Created by ASUS on 2017/8/25.

*/

public class TodayAdapter extends BaseAdapter {

Context context;

List