我試圖理解這個代碼: 什麼我不明白的是意義
的obj
從 message.obj =結果;
由google api, 這是一個任意對象發送給收件人。 爲什麼我們在這個java [android]世界中使用任意對象?
class DownThread extends Thread {
String mAddr;
DownThread(String addr) {
mAddr = addr;
}
public void run() {
String result = DownloadHtml(mAddr);
Message message = mAfterDown.obtainMessage();
message.obj = result;
mAfterDown.sendMessage(message);
}
String DownloadHtml(String addr) {
StringBuilder html = new StringBuilder();
try {
URL url = new URL(addr);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
if (conn != null) {
conn.setConnectTimeout(10000);
conn.setUseCaches(false);
if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
BufferedReader br = new BufferedReader(
new InputStreamReader(conn.getInputStream())
);
for(;;) {
String line = br.readLine();
if (line == null) break;
html.append(line + "/n");
}
br.close();
}
conn.disconnect();
}
} catch (NetworkOnMainThreadException e){
return e.getMessage();
} catch (Exception e){
return e.getMessage();
}
return html.toString();
}
}
Handler mAfterDown = new Handler() {
public void handleMessage(Message msg) {
mProgress.dismiss();
TextView result = (TextView) findViewById(R.id.result);
result.setText((String) msg.obj);
}
};
謝謝你,你幫了我很多。 – bruno