Android中封裝Http請求

HttpConnectionUtils 支持get post put delete請求圖片請求

Java代碼

/**
* HTTP connection helper
* @author
*
*/
public class HttpConnectionUtils implements Runnable {
private static final String TAG = HttpConnectionUtils.class.getSimpleName();
public static final int DID_START = 0;
public static final int DID_ERROR = 1;
public static final int DID_SUCCEED = 2;
private static final int GET = 0;
private static final int POST = 1;
private static final int PUT = 2;
private static final int DELETE = 3;
private static final int BITMAP = 4;
private String url;
private int method;
private Handler handler;
private List<NameValuePair> data;
private HttpClient httpClient;
public HttpConnectionUtils() {
this(new Handler());
}
public HttpConnectionUtils(Handler _handler) {
handler = _handler;
}
public void create(int method, String url, List<NameValuePair> data) {
Log.d(TAG, "method:"+method+" ,url:"+url+" ,data:"+data);
this.method = method;
this.url = url;
this.data = data;
ConnectionManager.getInstance().push(this);
}
public void get(String url) {
create(GET, url, null);
}
public void post(String url, List<NameValuePair> data) {
create(POST, url, data);
}
public void put(String url, List<NameValuePair> data) {
create(PUT, url, data);
}
public void delete(String url) {
create(DELETE, url, null);
}
public void bitmap(String url) {
create(BITMAP, url, null);
}
@Override
public void run() {
handler.sendMessage(Message.obtain(handler, HttpConnectionUtils.DID_START));
httpClient = new DefaultHttpClient();
HttpConnectionParams
.setConnectionTimeout(httpClient.getParams(), 6000);
try {
HttpResponse response = null;
switch (method) {
case GET:
response = httpClient.execute(new HttpGet(url));
break;
case POST:
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(data,HTTP.UTF_8));
response = httpClient.execute(httpPost);
break;
case PUT:
HttpPut httpPut = new HttpPut(url);
httpPut.setEntity(new UrlEncodedFormEntity(data,HTTP.UTF_8));
response = httpClient.execute(httpPut);
break;
case DELETE:
response = httpClient.execute(new HttpDelete(url));
break;
case BITMAP:
response = httpClient.execute(new HttpGet(url));
processBitmapEntity(response.getEntity());
break;
}
if (method < BITMAP)
processEntity(response.getEntity());
} catch (Exception e) {
handler.sendMessage(Message.obtain(handler,
HttpConnectionUtils.DID_ERROR, e));
}
ConnectionManager.getInstance().didComplete(this);
}
private void processEntity(HttpEntity entity) throws IllegalStateException,
IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(entity
.getContent()));
String line, result = "";
while ((line = br.readLine()) != null)
result += line;
Message message = Message.obtain(handler, DID_SUCCEED, result);
handler.sendMessage(message);
}
private void processBitmapEntity(HttpEntity entity) throws IOException {
BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(entity);
Bitmap bm = BitmapFactory.decodeStream(bufHttpEntity.getContent());
handler.sendMessage(Message.obtain(handler, DID_SUCCEED, bm));
}

/**
 * HTTP connection helper
 * @author
 *
 */
public class HttpConnectionUtils implements Runnable {
	private static final String TAG = HttpConnectionUtils.class.getSimpleName();
	public static final int DID_START = 0;
	public static final int DID_ERROR = 1;
	public static final int DID_SUCCEED = 2;

	private static final int GET = 0;
	private static final int POST = 1;
	private static final int PUT = 2;
	private static final int DELETE = 3;
	private static final int BITMAP = 4;

	private String url;
	private int method;
	private Handler handler;
	private List<NameValuePair> data;

	private HttpClient httpClient;

	public HttpConnectionUtils() {
		this(new Handler());
	}

	public HttpConnectionUtils(Handler _handler) {
		handler = _handler;
	}
	
	public void create(int method, String url, List<NameValuePair> data) {
		Log.d(TAG, "method:"+method+" ,url:"+url+" ,data:"+data);
		this.method = method;
		this.url = url;
		this.data = data;
		ConnectionManager.getInstance().push(this);
	}

	public void get(String url) {
		create(GET, url, null);
	}

	public void post(String url, List<NameValuePair> data) {
		create(POST, url, data);
	}
	
	public void put(String url, List<NameValuePair> data) {
		create(PUT, url, data);
	}

	public void delete(String url) {
		create(DELETE, url, null);
	}

	public void bitmap(String url) {
		create(BITMAP, url, null);
	}

	@Override
	public void run() {
		handler.sendMessage(Message.obtain(handler, HttpConnectionUtils.DID_START));
		httpClient = new DefaultHttpClient();
		HttpConnectionParams
				.setConnectionTimeout(httpClient.getParams(), 6000);
		try {
			HttpResponse response = null;
			switch (method) {
			case GET:
				response = httpClient.execute(new HttpGet(url));
				break;
			case POST:
				HttpPost httpPost = new HttpPost(url);
				httpPost.setEntity(new UrlEncodedFormEntity(data,HTTP.UTF_8));
				response = httpClient.execute(httpPost);
				break;
			case PUT:
				HttpPut httpPut = new HttpPut(url);
				httpPut.setEntity(new UrlEncodedFormEntity(data,HTTP.UTF_8));
				response = httpClient.execute(httpPut);
				break;
			case DELETE:
				response = httpClient.execute(new HttpDelete(url));
				break;
			case BITMAP:
				response = httpClient.execute(new HttpGet(url));
				processBitmapEntity(response.getEntity());
				break;
			}
			if (method < BITMAP)
				processEntity(response.getEntity());
		} catch (Exception e) {
			handler.sendMessage(Message.obtain(handler,
					HttpConnectionUtils.DID_ERROR, e));
		}
		  ConnectionManager.getInstance().didComplete(this);
	}

	private void processEntity(HttpEntity entity) throws IllegalStateException,
			IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(entity
				.getContent()));
		String line, result = "";
		while ((line = br.readLine()) != null)
			result += line;
		Message message = Message.obtain(handler, DID_SUCCEED, result);
		handler.sendMessage(message);
	}

	private void processBitmapEntity(HttpEntity entity) throws IOException {
		BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(entity);
		Bitmap bm = BitmapFactory.decodeStream(bufHttpEntity.getContent());
		handler.sendMessage(Message.obtain(handler, DID_SUCCEED, bm));
	}

ConnectionManager

Java代碼

public class ConnectionManager {
public static final int MAX_CONNECTIONS = 5;
private ArrayList<Runnable> active = new ArrayList<Runnable>();
private ArrayList<Runnable> queue = new ArrayList<Runnable>();
private static ConnectionManager instance;
public static ConnectionManager getInstance() {
if (instance == null)
instance = new ConnectionManager();
return instance;
}
public void push(Runnable runnable) {
queue.add(runnable);
if (active.size() < MAX_CONNECTIONS)
startNext();
}
private void startNext() {
if (!queue.isEmpty()) {
Runnable next = queue.get(0);
queue.remove(0);
active.add(next);
Thread thread = new Thread(next);
thread.start();
}
}
public void didComplete(Runnable runnable) {
active.remove(runnable);
startNext();
}
}

public class ConnectionManager {
	public static final int MAX_CONNECTIONS = 5;
	 
	private ArrayList<Runnable> active = new ArrayList<Runnable>();
    private ArrayList<Runnable> queue = new ArrayList<Runnable>();

    private static ConnectionManager instance;

    public static ConnectionManager getInstance() {
         if (instance == null)
              instance = new ConnectionManager();
         return instance;
    }

    public void push(Runnable runnable) {
         queue.add(runnable);
         if (active.size() < MAX_CONNECTIONS)
              startNext();
    }

    private void startNext() {
         if (!queue.isEmpty()) {
              Runnable next = queue.get(0);
              queue.remove(0);
              active.add(next);

              Thread thread = new Thread(next);
              thread.start();
         }
    }

    public void didComplete(Runnable runnable) {
         active.remove(runnable);
         startNext();
    }

}

封裝的Handler HttpHandler 也可以自己處理

Java代碼

public class HttpHandler extends Handler {
private Context context;
private ProgressDialog progressDialog;
public HttpHandler(Context context) {
this.context = context;
}
protected void start() {
progressDialog = ProgressDialog.show(context,
"Please Wait...", "processing...", true);
}
protected void succeed(JSONObject jObject) {
if(progressDialog!=null && progressDialog.isShowing()){
progressDialog.dismiss();
}
}
protected void failed(JSONObject jObject) {
if(progressDialog!=null && progressDialog.isShowing()){
progressDialog.dismiss();
}
}
protected void otherHandleMessage(Message message){
}
public void handleMessage(Message message) {
switch (message.what) {
case HttpConnectionUtils.DID_START: //connection start
Log.d(context.getClass().getSimpleName(),
"http connection start...");
start();
break;
case HttpConnectionUtils.DID_SUCCEED: //connection success
progressDialog.dismiss();
String response = (String) message.obj;
Log.d(context.getClass().getSimpleName(), "http connection return."
+ response);
try {
JSONObject jObject = new JSONObject(response == null ? ""
: response.trim());
if ("true".equals(jObject.getString("success"))) { //operate success
Toast.makeText(context, "operate succeed:"+jObject.getString("msg"),Toast.LENGTH_SHORT).show();
succeed(jObject);
} else {
Toast.makeText(context, "operate fialed:"+jObject.getString("msg"),Toast.LENGTH_LONG).show();
failed(jObject);
}
} catch (JSONException e1) {
if(progressDialog!=null && progressDialog.isShowing()){
progressDialog.dismiss();
}
e1.printStackTrace();
Toast.makeText(context, "Response data is not json data",
Toast.LENGTH_LONG).show();
}
break;
case HttpConnectionUtils.DID_ERROR: //connection error
if(progressDialog!=null && progressDialog.isShowing()){
progressDialog.dismiss();
}
Exception e = (Exception) message.obj;
e.printStackTrace();
Log.e(context.getClass().getSimpleName(), "connection fail."
+ e.getMessage());
Toast.makeText(context, "connection fail,please check connection!",
Toast.LENGTH_LONG).show();
break;
}
otherHandleMessage(message);
}
}

public class HttpHandler extends Handler {

	private Context context;
	private ProgressDialog progressDialog;

	public HttpHandler(Context context) {
		this.context = context;
	}

	protected void start() {
		progressDialog = ProgressDialog.show(context,
				"Please Wait...", "processing...", true);
	}

	protected void succeed(JSONObject jObject) {
		if(progressDialog!=null && progressDialog.isShowing()){
			progressDialog.dismiss();
		}
	}

	protected void failed(JSONObject jObject) {
		if(progressDialog!=null && progressDialog.isShowing()){
			progressDialog.dismiss();
		}
	}
	
	protected void otherHandleMessage(Message message){
	}
	
	public void handleMessage(Message message) {
		switch (message.what) {
		case HttpConnectionUtils.DID_START: //connection start
			Log.d(context.getClass().getSimpleName(),
					"http connection start...");
			start();
			break;
		case HttpConnectionUtils.DID_SUCCEED: //connection success
			progressDialog.dismiss();
			String response = (String) message.obj;
			Log.d(context.getClass().getSimpleName(), "http connection return."
					+ response);
			try {
				JSONObject jObject = new JSONObject(response == null ? ""
						: response.trim());
				if ("true".equals(jObject.getString("success"))) { //operate success
					Toast.makeText(context, "operate succeed:"+jObject.getString("msg"),Toast.LENGTH_SHORT).show();
					succeed(jObject);
				} else {
					Toast.makeText(context, "operate fialed:"+jObject.getString("msg"),Toast.LENGTH_LONG).show();
					failed(jObject);
				}
			} catch (JSONException e1) {
				if(progressDialog!=null && progressDialog.isShowing()){
					progressDialog.dismiss();
				}
				e1.printStackTrace();
				Toast.makeText(context, "Response data is not json data",
						Toast.LENGTH_LONG).show();
			}
			break;
		case HttpConnectionUtils.DID_ERROR: //connection error
			if(progressDialog!=null && progressDialog.isShowing()){
				progressDialog.dismiss();
			}
			Exception e = (Exception) message.obj;
			e.printStackTrace();
			Log.e(context.getClass().getSimpleName(), "connection fail."
					+ e.getMessage());
			Toast.makeText(context, "connection fail,please check connection!",
					Toast.LENGTH_LONG).show();
			break;
		}
		otherHandleMessage(message);
	}

}

我這兒server端返回的數據都是json格式。必須包括{success:"true",msg:"xxx",other:xxx} 操作成功success爲true.

調用的代碼：

Java代碼

private Handler handler = new HttpHandler(LoginActivity.this) {
@Override
protected void succeed(JSONObject jObject) { //自己處理成功後的操作
super.succeed(jObject);
} //也可以在這重寫start() failed()方法
};
private void login() {
ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("email", loginEmail.getText().toString()));
params.add(new BasicNameValuePair("password", loginPassword.getText().toString()));
String urlString = HttpConnectionUtils.getUrlFromResources(LoginActivity.this, R.string.login_url);
new HttpConnectionUtils(handler).post(urlString, params);
}

轉自：http://datuo.iteye.com/blog/1094994

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