第一行代码第二版关于作者bingapi无法使用的解决方案
冉丰茂
在《第一行代码》第二版中最后一章coolweather开发中 14.5.4节 获取必应每日一图
截止到2023.4.5 在访问作者提供的网站
发现返回错误
Request bing pic with error: failed to connect: getaddrinfo: Temporary failure in name resolution
可以自己写一个api来获取bing每日一图，通过bing提供的官方api
https://cn.bing.com/HPImageArchive.aspx?format=js&idx=0&n=1
来获取到json数据，获取到的数据如下
{"images":[{"startdate":"20230404","fullstartdate":"202304041600","enddate":"20230405","url":"/th?id=OHR.QingMing2023_ZH-CN6951199028_1920x1080.jpg&rf=LaDigue_1920x1080.jpg&pid=hp","urlbase":"/th?id=OHR.QingMing2023_ZH-CN6951199028","copyright":"杭州西湖水墨意境般的风景，浙江省，中国 (© zhangshuang/Getty Images)","copyrightlink":"https://www.bing.com/search?q=%E6%B8%85%E6%98%8E%E8%8A%82&form=hpcapt&mkt=zh-cn","title":"水墨西湖","quiz":"/search?q=Bing+homepage+quiz&filters=WQOskey:%22HPQuiz_20230404_QingMing2023%22&FORM=HPQUIZ","wp":true,"hsh":"fb3b90fb33dde5b3c99c9e2475635809","drk":1,"top":1,"bot":1,"hs":[]}],"tooltips":{"loading":"正在加载...","previous":"上一个图像","next":"下一个图像","walle":"此图片不能下载用作壁纸。","walls":"下载今日美图。仅限用作桌面壁纸。"}}
发现url，通过拼接可得到真正的图片地址
picurl="http://cn.bing.com"+url;
总共分三步，首先通过网络请求获取json数据，然后解析json数据，最后获取到图片地址，用Glide加载到imageview中。
网络请求url代码
private void getImage(){
final String bingUrl =
"https://cn.bing.com/HPImageArchive.aspx?format=js&idx=0&n=1";
new Thread(new Runnable() {
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(bingUrl)
.build();
Response response = null;
response = client.newCall(request).execute();
//解析json数据
parseJSONWithJSONObject(response.body().string());
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}json解析代码
private void parseJSONWithJSONObject(String jsonData){
try {
//获取jsonarray中image的jsonobject
JSONArray jsonArray = new JSONObject(jsonData).getJSONArray("images");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
//把url的值放入变量url中
String url = jsonObject.getString("url");
String picurl="http://cn.bing.com"+url;
//加载bingpic
loadBingPic(picurl);
}
} catch (JSONException e) {
e.printStackTrace();
}
}通过地址获取图片
private void loadBingPic(final String response) {
final String bingPic = response;
SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this).edit();
editor.putString("bing_pic", bingPic);
editor.apply();
//在ui线程中更新页面
runOnUiThread(new Runnable() {
@Override
public void run() {
Glide.with(WeatherActivity.this).load(bingPic).into(bingPicImg);
}
});
}weatheractivity中的代码如下
private void getImage(){
final String bingUrl = "https://cn.bing.com/HPImageArchive.aspx?format=js&idx=0&n=1";
new Thread(new Runnable() {
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(bingUrl)
.build();
Response response = null;
response = client.newCall(request).execute();
parseJSONWithJSONObject(response.body().string());
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
private void parseJSONWithJSONObject(String jsonData){
try {
JSONArray jsonArray = new JSONObject(jsonData).getJSONArray("images");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
String url = jsonObject.getString("url");
String picurl="http://cn.bing.com"+url;
loadBingPic(picurl);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
private void loadBingPic(final String response) {
final String bingPic = response;
SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this).edit();
editor.putString("bing_pic", bingPic);
editor.apply();
runOnUiThread(new Runnable() {
@Override
public void run() {
Glide.with(WeatherActivity.this).load(bingPic).into(bingPicImg);
}
});
}在使用时将前面loadBingpic()全部替换为getImage()即可；
AutoUpdateService中代码如下：
private void updateBingPic(){
final String bingUrl = "https://cn.bing.com/HPImageArchive.aspx?format=js&idx=0&n=1";
new Thread(new Runnable() {
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(bingUrl)
.build();
Response response = null;
response = client.newCall(request).execute();
parseJSONWithJSONObject(response.body().string());
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
private void loadBingPic(final String response) {
final String bingPic = response;
SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(AutoUpdateService.this).edit();
editor.putString("bing_pic", bingPic);
editor.apply();
}
private void parseJSONWithJSONObject(String jsonData){
try {
// JSONArray jsonArray = new JSONArray(jsonData);
JSONArray jsonArray = new JSONObject(jsonData).getJSONArray("images");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
String url = jsonObject.getString("url");
String picurl="http://cn.bing.com"+url;
loadBingPic(picurl);
}
} catch (JSONException e) {
e.printStackTrace();
}
}要在onstartcommand中使用updateBingPic方法
public int onStartCommand(Intent intent, int flags, int startId) {
updateBingPic();//在这里加入这个函数即可
updateWeather();...
另：系统状态栏半透明化可能不好用
if(Build.VERSION.SDK_INT>=21){
View decorView = getWindow().getDecorView();
decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
getWindow().setStatusBarColor(Color.TRANSPARENT);
}
可以在res/values/styles.xml中加入
<item name="android:windowTranslucentStatus">true</item>
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