1、下載下傳: https://github.com/loopj/android-async-http 2、在工程中加入jar包,或直接把源檔案加到工程中 3、android-async-http文檔: http://loopj.com/android-async-http/
AsyncHttp使用回調的方法處得請求的結果。
AsyncHttpClient client = new AsyncHttpClient();
client.get("http://www.google.com", new AsyncHttpResponseHandler() {
@Override
public void onSuccess(String response) {
System.out.println(response);
}
});
最好建一個靜态的AsyncHttpClient
public class HttpUtil {
private static AsyncHttpClient client = new AsyncHttpClient(); // 執行個體話對象
static {
client.setTimeout(10000); // 設定連結逾時,如果不設定,預設為10s
}
// 用一個完整url擷取一個string對象
public static void get(String urlString, AsyncHttpResponseHandler res) {
client.get(urlString, res);
}
// url裡面帶參數
public static void get(String urlString, RequestParams params,
AsyncHttpResponseHandler res){
client.get(urlString, params, res);
}
// 不帶參數,擷取json對象或者數組
public static void get(String urlString, JsonHttpResponseHandler res) {
client.get(urlString, res);
}
// 帶參數,擷取json對象或者數組
public static void get(String urlString, RequestParams params,
JsonHttpResponseHandler res) {
client.get(urlString, params, res);
}
// 下載下傳資料使用,會傳回byte資料
public static void get(String uString, BinaryHttpResponseHandler bHandler) {
client.get(uString, bHandler);
}
public static AsyncHttpClient getClient(){
return client;
}
}
下載下傳:
public void downloadClick(View view) {
String url = "http://f.hiphotos.baidu.com/album/w% 3D2048/sign=38c43ff7902397ddd6799f046dbab3b7/9c16fdfaaf51f3dee973bf7495eef01f3b2979d8.jpg";
HttpUtil.get(url, new BinaryHttpResponseHandler() {
@Override
public void onSuccess(byte[] arg0) {
super.onSuccess(arg0);
File file = Environment.getExternalStorageDirectory();
File file2 = new File(file, "cat");
file2.mkdir();
file2 = new File(file2, "cat.jpg");
try {
FileOutputStream oStream = new FileOutputStream(file2);
oStream.write(arg0);
oStream.flush();
oStream.close();
textView.setText("可愛的貓咪已經儲存在sdcard裡面");
} catch (Exception e) {
e.printStackTrace();
Log.i("hck", e.toString());
}
}
});
}
上傳:
public void uploadClick(View view){
String path="http://10.0.2.2:8080/jsontest/servlet/UploadServlet";
File myFile = new File("/sdcard/cat/cat.jpg");
RequestParams params = new RequestParams();
try {
params.put("filename", myFile);
AsyncHttpClient client = new AsyncHttpClient();
client.post(path, params, new AsyncHttpResponseHandler(){
@Override
public void onSuccess(int statusCode, String content) {
super.onSuccess(statusCode, content);
Toast.makeText(MainActivity.this, "上傳成功!", Toast.LENGTH_LONG).show();
}
});
} catch(FileNotFoundException e) {
}
}