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;
}
}
