http连接网络

来源：互联网发布：淘宝网保障基金编辑：程序博客网时间：2024/06/06 20:15

public class MainActivity extends AppCompatActivity {    public static final String TAG ="MainActivity";    private ListView listview;    private ImageView imageview;    private TextView textview;Handler han=new Handler(){    @Override    public void handleMessage(Message msg) {        super.handleMessage(msg);        int what = msg.what;        Log.e(TAG,"-----------8--------------------");        if(what==1){            imageview.setImageBitmap((Bitmap) msg.obj);        }    }};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //强传alt+回车        listview = (ListView) findViewById(R.id.listview);        imageview = (ImageView) findViewById(R.id.imageview);        textview = (TextView) findViewById(R.id.textview);        imageview.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Toast.makeText(MainActivity.this,"=============",Toast.LENGTH_SHORT).show();                new Thread(                        new Runnable() {                            @Override                            public void run() {                                Log.e(TAG,"-----------1---------------------");                                String url="http://169.254.37.115:8080/test/2.png";                                Log.e(TAG,"-----------2---------------------");                                NetworkUtil networkUtil=new NetworkUtil();                                Log.e(TAG,"-----------3---------------------");                                Bitmap netImage=networkUtil.getNetImage(url);                                Log.e(TAG,"-----------4---------------------");                                Message message=han.obtainMessage();                                Log.e(TAG,"-----------6---------------------");                                message.obj=netImage;                                Log.e(TAG,"-----------7---------------------");                                message.what=1;                                han.sendMessage(message);                            }                        }                ).start();            }        });        new Thread() {            @Override            public void run() {                super.run();                //联网是耗时操作,要放在子线程,ip地址用本机的                try {                    //定义一个url对象                    URL url = new URL("http://169.254.37.115:8080/test/network.json");                    //通过url打开连接;                    Log.e(TAG,"-----------8---------------------");                    URLConnection urlConnection = url.openConnection();                    //服务器返回的数据都是以流的形式;                    Log.e(TAG,"-----------9---------------------");                    InputStream inputStream = urlConnection.getInputStream();                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));                    StringBuilder stringBuilder = new StringBuilder();                    String stringTemp = "";                    Log.e(TAG,"-----------10---------------------");                    while ((stringTemp = bufferedReader.readLine()) != null) {                        stringBuilder.append(stringTemp);                    }                    String result = stringBuilder.toString();                    Log.e(TAG,"-----------11---------------------"+result);                } catch (Exception e) {                    e.printStackTrace();                }            }        }.start();    }}

//这个是弄获取图片的类

public class NetworkUtil {    private int responseCode;    public Bitmap getNetImage(String urlString) {        URL url = null;        try {            url = new URL(urlString);            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();            int responseCode = urlConnection.getResponseCode();            if(responseCode==200){                InputStream inputStream = urlConnection.getInputStream();                Bitmap bitmap = BitmapFactory.decodeStream(inputStream);                return bitmap;            }        } catch (Exception e) {        }    return null;    }}

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