获取网络文字+图片 更新ui
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public String urlString = "http://api.expoon.com/AppNews/getNewsList/type/1/p/1";
String urlBitmap = "http://img.my.csdn.net/uploads/201407/26/1406383265_8550.jpg";
String tag = "wzq";
private ImageView iv;
private TextView tv;
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
int what = msg.what;
switch (what) {
case 1://属于更新文字
String infoText = (String) msg.obj;
tv.setText(infoText);
break;
case 2://更新图片
Bitmap bitmap = (Bitmap) msg.obj;
iv.setImageBitmap(bitmap);
break;
}
}
};
/**
* alt+enter 自动补全
* fbc --再tabfindViewByIde的快捷键;
* ctrl+alt +F 声明全局变量
* ctrl+alt +L 格式化代码
* ctro+p 参数提示
* f2 --定位代码错误位置
*
* @param savedInstanceState
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.tv);
iv = (ImageView) findViewById(R.id.iv);
setClickListener();
}
private void setClickListener() {
/**
* 文字的点击事件
*/
tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//联网是耗时操作,不能直接在主线程写
//子线程不能更新UI
new Thread() {
@Override
public void run() {
super.run();
String netJson = NetUtil.getNetJson(urlString);
Gson gson = new Gson();
Product product = gson.fromJson(netJson, Product.class);
String infoText = product.getInfo();
Message message = new Message();
message.obj = infoText;
message.what = 1;
handler.sendMessage(message);
}
}.start();
}
});
iv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new Thread(new Runnable() {
@Override
public void run() {
//获取网络图片的工具类
Bitmap netBitmap = NetUtil.getNetBitmap(urlBitmap);
Message message = handler.obtainMessage();
message.obj= netBitmap;
message.what = 2;
handler.sendMessage(message);
}
}).start();
}
});
}
}
public class NetUtil {
private static String tag = "getNetJson";
public static String getNetJson(String urlString) {
try {
//url对象封装接口字符串
URL url = new URL(urlString);
//用url打开连接, 返回值我们用HttpURLConnection
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setConnectTimeout(8000);//设置链接超时时间
int responseCode = urlConnection.getResponseCode(); //获取状态码
if (responseCode == 200) {
InputStream inputStream = urlConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
//可拼接的字符串
StringBuilder stringBuilder = new StringBuilder();
String temp = "";
while ((temp = bufferedReader.readLine()) != null) {
stringBuilder.append(temp);
}
String jsonString = stringBuilder.toString();
return jsonString;
} else {
}
} catch (MalformedURLException e) {
e.printStackTrace();
Log.e(tag, "getNetJson: " + e.toString());
} catch (IOException e) {
e.printStackTrace();
Log.e(tag, "getNetJson: " + e.toString());
}
return "";
}
/**
* 获取网络图片
*
* @param urlString
* @return
*/
public static Bitmap getNetBitmap(String urlString) {
try {
URL url = new URL(urlString);
HttpURLConnection httpurlConnection = (HttpURLConnection) url.openConnection();
httpurlConnection.setConnectTimeout(8000);//设置链接超时时间
int responseCode = httpurlConnection.getResponseCode();
if (responseCode == 200) {
InputStream inputStream = httpurlConnection.getInputStream();
//BitmapFactory: android提供好的加工图片的工具类,
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
return bitmap;
} else {
//do nothing
}
} catch (MalformedURLException e) {
e.printStackTrace();
Log.e(tag, "getNetBitmap: " + e.toString());
} catch (IOException e) {
e.printStackTrace();
Log.e(tag, "getNetBitmap: " + e.toString());
}
return null;
}
}
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