安卓 天气预报

我想说我刚写的博客不见了,于是打算去玩的计划取消,滚回来重写了

首先呢是设置权限

<uses-permission android:name="android.permission.INTERNET"/><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

然后呢我们要导入包

dependencies {    compile fileTree(include: ['*.jar'], dir: 'libs')    compile files('libs/httpclient-4.4.1.jar')    compile files('libs/httpcore-4.4.1.jar')}

导完之后不要忘记加这个

packagingOptions {//导入http包的时候必须要加的以下这段话    exclude 'META-INF/DEPENDENCIES.txt'    exclude 'META-INF/LICENSE.txt'    exclude 'META-INF/NOTICE.txt'    exclude 'META-INF/NOTICE'    exclude 'META-INF/LICENSE'    exclude 'META-INF/DEPENDENCIES'    exclude 'META-INF/notice.txt'    exclude 'META-INF/license.txt'    exclude 'META-INF/dependencies.txt'    exclude 'META-INF/LGPL2.1'}

好啦 让我们再一次愉快地敲起代码来

首先当然是加线程啦,像访问网络这种复杂的事情,哀家是不会自己做的,发配给我的子民去完成吧

private class thread implements Runnable{    @Override    public void run() {        String todayStart   = "http://api.k780.com:88/?app=weather.today&weaid=";        String todayCity    = local.getText().toString();        String todayEnd     = "&&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json";        String todayWeather = getURLConnection(todayStart + todayCity + todayEnd);        System.out.println("11111"+todayWeather);        Message msg = new Message();        Bundle bundle = new Bundle();        bundle.putString("todayWeather", todayWeather);        msg.setData(bundle);        //getBitmap(URL);        handler.sendMessage(msg);    }}

然后线程中有一个方法是获取接口中的内容

private String getURLConnection(String path){    String xml = "";    try {        HttpClient client = new DefaultHttpClient();//创建一个http对象        HttpGet    get    = new HttpGet(path);        HttpResponse response = client.execute(get);        int code = response.getStatusLine().getStatusCode();//得到http响应结果的状态代码        Log.d("http", "code");        if(code==200){            //getEntity()是获取实体,getContent()是获取数据流            InputStream reader = response.getEntity().getContent();            BufferedReader bf = new BufferedReader(new InputStreamReader(reader));            String list = bf.readLine();//读一行            while(list!=null){                xml += list;                list = bf.readLine();            }        }    } catch (IOException e) {        e.printStackTrace();    }    System.out.println("22222" + xml);    return xml;}

做完之后呢  要使用handler处理一下

public class Myhandler extends Handler {    public void handleMessage(Message msg)  {        String todayWeather = msg.getData().getString("todayWeather");        if(!todayWeather.equals("")){            try {                todayWeather = String.valueOf(new JSONObject(todayWeather).getJSONObject("result"));                JSONObject json = new JSONObject(todayWeather);                time.setText(json.getString("days"));                temp.setText(json.getString("temperature"));                weather.setText(json.getString("weather"));                wind.setText(json.getString("wind"));                    URL = json.getString("weather_icon");                    thread2 t2 = new thread2();                    t2.start();            } catch (JSONException e) {                e.printStackTrace();            }        }    }}

在handler里面通过json解析,获取我们要的东西啦

如果宝宝们还想通过天气更改图标的话就要再加一个线程啦

private class thread2 extends Thread{    @Override    public void run() {        try{        URL myUrl = new URL(URL);        HttpURLConnection conn = (HttpURLConnection)myUrl.openConnection();        conn.setDoInput(true);        conn.setUseCaches(false);        conn.setRequestMethod("GET");        conn.connect();        Log.d("abc",String.valueOf(conn.getResponseCode()));        InputStream is = conn.getInputStream();        Log.d("is", String.valueOf(is));        bitmap = BitmapFactory.decodeStream(is);        Log.d("nine", "true");        is.close();        Message m = Message.obtain();            m.what=2;            phandler.sendMessage(m);        Log.d("is","true");    } catch (Exception e) {        e.printStackTrace();    }    Log.d("bitmap", "true");    }}

然后处理,将获取的图片添加到ui中

public class Phandler extends Handler {    public void handleMessage(Message msg) {          if(msg.what==2){              pic.setImageBitmap(bitmap);          }    }}

由于我一开始对线程不太理解,所以在这里浪费了很多时间,其实就是主线程呢自己不想做太复杂的事情,然后他就把事情交给苦逼的子线程去做,子线程做完了呢,主线程使用handler处理一下就ok了.

好啦,终于把总结写完了,安卓学了这么久也还是不太会,有啥理解错的就告诉我吧,这次我真的要开心的去玩耍了