{"id":925,"date":"2015-08-05T19:32:03","date_gmt":"2015-08-05T11:32:03","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=925"},"modified":"2026-08-18T12:58:43","modified_gmt":"2026-08-18T04:58:43","slug":"http%e7%bd%91%e7%bb%9c%e8%bf%9e%e6%8e%a5%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=925","title":{"rendered":"Http\u7f51\u7edc\u8fde\u63a5\u5904\u7406"},"content":{"rendered":"
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Android \u8054\u7f51\u5148\u62ff\u56de\u6570\u636e\u518d\u89e3\u6790\u3002HTTP \u534f\u8bae\u53ef\u53c2\u8003 \u6df1\u5165\u7406\u89e3HTTP\u534f\u8bae<\/a>\u3002\u52a8\u624b\u524d\u5728 manifest \u52a0\u6743\u9650\uff0c\u68c0\u67e5\u7f51\u7edc\u662f\u5426\u53ef\u7528\uff0c\u5e76\u628a\u8bf7\u6c42\u653e\u5230 UI \u7ebf\u7a0b\u4e4b\u5916\uff08\u5e38\u7528 AsyncTask<\/code>\uff09\u3002\u5ba2\u6237\u7aef\u591a\u7528 HttpURLConnection<\/code>\uff0c\u4e5f\u53ef\u7528 Apache HttpClient\u3002<\/p>\n<\/blockquote>\n

<\/p>\n

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\u4e00\u3001\u6743\u9650\u4e0e\u7f51\u7edc\u662f\u5426\u53ef\u7528<\/span><\/h2>\n
<uses-permission android:name=\"android.permission.INTERNET\" \/>\n<uses-permission android:name=\"android.permission.ACCESS_NETWORK_STATE\" \/><\/code><\/pre>\n
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);\nNetworkInfo networkInfo = connMgr.getActiveNetworkInfo();\nif (isGpsConnection() || isWiFiConnection()) {\n    \/\/\u7f51\u7edc\u8fde\u63a5\u53ef\u7528\n} else {\n    \/\/\u7f51\u7edc\u8fde\u63a5\u4e0d\u53ef\u7528!\n}<\/code><\/pre>\n
public boolean isGpsConnection(){\n    ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);\n    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();\n    if (networkInfo != null && networkInfo.isConnected()) {\n        return true;\n    } else {\n        return false;\n    }\n}\n\npublic boolean isWiFiConnection(Context inContext) {\n    Context context = inContext.getApplicationContext();\n    ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);\n\n    if (connectivity != null) {\n        NetworkInfo[] info = connectivity.getAllNetworkInfo();\n        if (info != null) {\n            for (int i = 0; i < info.length; i++) {\n                if (info[i].getTypeName().equals(\"WIFI\") && info[i].isConnected()) {\n                    return true;\n                }\n            }\n        }\n    }\n    return false;\n}<\/code><\/pre>\n
\n
\u4e8c\u3001AsyncTask \u907f\u5f00 UI \u7ebf\u7a0b\u5ef6\u8fdf<\/span><\/h2>\n
\u7f51\u7edc\u4f1a\u6709\u4e0d\u53ef\u9884\u671f\u5ef6\u8fdf\uff0c\u5fc5\u987b\u5728 UI Thread \u5916\u6267\u884c\u3002doInBackground<\/code> \u8c03 downloadUrl()<\/code>\uff08URL \u4ece execute()<\/code> \u4f20\u5165\uff0cparams[0] \u662f url\uff09\uff0c\u5904\u7406\u5b8c\u628a String \u4ea4\u7ed9 onPostExecute<\/code> \u66f4\u65b0 UI\u3002<\/p>\n
private class DownloadWebpageText extends AsyncTask<String, Void, String> {\n    @Override\n    protected String doInBackground(String... urls) {\n        \/\/ \u53c2\u6570\u4ece execute() \u4f20\u5165, params[0] \u8868\u793a url\n    }\n\n    @Override\n    protected void onPostExecute(String result) {\n    }\n}<\/code><\/pre>\n
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\u4e09\u3001\u5b8c\u6574\u5b9e\u4f8b\uff1aHttpURLConnection GET<\/span><\/h2>\n
\u5e03\u5c40 activity_httpconnection_layout.xml<\/code>\uff1a<\/p>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<LinearLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n    android:layout_width=\"match_parent\"\n    android:layout_height=\"match_parent\"\n    android:orientation=\"vertical\" >\n\n    <EditText\n        android:id=\"@+id\/http_url_edit\"\n        android:layout_width=\"match_parent\"\n        android:layout_height=\"wrap_content\"\n        android:hint=\"\u8bf7\u8f93\u5165URL\u5730\u5740\" \/>\n\n    <TextView\n        android:id=\"@+id\/http_content_txt\"\n        android:layout_width=\"match_parent\"\n        android:layout_height=\"wrap_content\" \/>\n\n    <Button android:id=\"@+id\/http_get_content_btn\"\n        android:layout_width=\"match_parent\"\n        android:onClick=\"onConnectionClickHandler\"\n        android:layout_height=\"wrap_content\" \/>\n\n<\/LinearLayout><\/code><\/pre>\n
HttpExampleActivity.java<\/code>\uff1a\u70b9\u6309\u94ae\u5148\u67e5\u7f51\u7edc\uff0c\u518d\u5f02\u6b65 GET\u3002\u6ce8\u610f getResponseCode()<\/code> \u8fd4\u56de\u72b6\u6001\u7801\uff0c200 \u8868\u793a\u6210\u529f\u3002<\/p>\n
public class HttpExampleActivity extends Activity {\n    private static final String DEBUG_TAG = \"HttpExample\";\n    private EditText mUrlText;\n    private TextView mShowMessageTxt;\n\n    @Override\n    public void onCreate(Bundle savedInstanceState) {\n        super.onCreate(savedInstanceState);\n        setContentView(R.layout.activity_httpconnection_layout);\n        mUrlText = (EditText) findViewById(R.id.http_url_edit);\n        mShowMessageTxt = (TextView) findViewById(R.id.http_content_txt);\n    }\n\n    public void onConnectionClickHandler(View view) {\n        String stringUrl = mUrlText.getText().toString();\n        ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);\n        NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();\n        if (networkInfo != null && networkInfo.isConnected()) {\n            new DownloadWebpageText().execute(stringUrl);\n        } else {\n            mShowMessageTxt.setText(\"\u7f51\u7edc\u8fde\u63a5\u4e0d\u53ef\u7528!\");\n        }\n    }\n\n    private class DownloadWebpageText extends AsyncTask<String, Void, String> {\n        @Override\n        protected String doInBackground(String... urls) {\n            try {\n                return downloadUrl(urls[0]);\n            } catch (IOException e) {\n                return \"Unable to retrieve web page. URL may be invalid.\";\n            }\n        }\n\n        @Override\n        protected void onPostExecute(String result) {\n            mShowMessageTxt.setText(result);\n        }\n    }\n\n    private String downloadUrl(String myurl) throws IOException {\n        InputStream is = null;\n        try {\n            URL url = new URL(myurl);\n            HttpURLConnection conn = (HttpURLConnection) url.openConnection();\n            conn.setReadTimeout(10000);\n            conn.setConnectTimeout(15000);\n            conn.setRequestMethod(\"GET\");\n            conn.setDoInput(true);\n\n            conn.connect();\n            int response = conn.getResponseCode();\n            Log.d(DEBUG_TAG, \"The response is: \" + response);\n            is = conn.getInputStream();\n            return readIt(is);\n        } finally {\n            if (is != null) {\n                is.close();\n            }\n        }\n    }\n\n    public String readIt(InputStream stream) throws IOException, UnsupportedEncodingException {\n        Reader reader = new InputStreamReader(stream, \"UTF-8\");\n        BufferedReader br = new BufferedReader(reader);\n        String line = null;\n        StringBuffer sb = new StringBuffer();\n        while ((line = br.readLine()) != null) {\n            sb.append(line);\n        }\n        return sb.toString();\n    }\n}<\/code><\/pre>\n
InputStream \u662f\u53ef\u8bfb\u7684 byte \u6e90\uff0c\u901a\u5e38\u8981 decode \u6210\u76ee\u6807\u7c7b\u578b\u3002\u4e0b\u56fe\u6570\u636e\u53ef\u76f4\u63a5\uff1a<\/p>\n
InputStream is = null;\n...\nBitmap bitmap = BitmapFactory.decodeStream(is);\nImageView imageView = (ImageView) findViewById(R.id.image_view);\nimageView.setImageBitmap(bitmap);<\/code><\/pre>\n
\n
\u56db\u3001Apache HttpClient \u5199\u6cd5<\/span><\/h2>\n
HttpClient httpClient = new DefaultHttpClient();\nHttpGet httpGet = new HttpGet(httpUrl);\nHttpResponse response = httpClient.execute(httpGet);\n\nint statusCode = response.getStatusLine().getStatusCode();\nLogs.v(\"statusCode >>> :\" + statusCode);\n\nif (statusCode == HttpURLConnection.HTTP_OK) {\n    InputStream ins = response.getEntity().getContent();\n    BufferedReader br = new BufferedReader(new InputStreamReader(ins, \"utf-8\"));\n    StringBuilder sb = new StringBuilder();\n    String line = null;\n    while ((line = br.readLine()) != null) {\n        sb.append(line);\n    }\n}<\/code><\/pre>\n\n\n\n\n\n\n\n\n\n
\u6b65\u9aa4<\/th>\n\u8981\u70b9<\/th>\n<\/tr>\n<\/thead>\n
\u6743\u9650<\/td>\nINTERNET + ACCESS_NETWORK_STATE<\/td>\n<\/tr>\n
\u53ef\u7528\u6027<\/td>\nConnectivityManager + NetworkInfo.isConnected<\/td>\n<\/tr>\n
\u7ebf\u7a0b<\/td>\nAsyncTask\uff1a\u540e\u53f0 download\uff0conPostExecute \u66f4\u65b0 UI<\/td>\n<\/tr>\n
\u5ba2\u6237\u7aef<\/td>\nHttpURLConnection\uff08\u63a8\u8350\uff09\u6216 Apache HttpClient<\/td>\n<\/tr>\n
\u6210\u529f\u7801<\/td>\ngetResponseCode() == 200<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1a\u8054\u7f51 = \u6743\u9650 + \u68c0\u67e5 NetworkInfo + \u540e\u53f0 HttpURLConnection GET\uff0c\u628a InputStream \u8f6c\u6210 String \u6216 Bitmap\uff0c\u72b6\u6001\u7801 200 \u518d\u5f53\u6210\u529f\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
Android \u8054\u7f51\u5148\u62ff\u56de\u6570\u636e\u518d\u89e3\u6790\u3002HTTP \u534f\u8bae\u53ef\u53c2\u8003 \u6df1\u5165\u7406\u89e3HTTP\u534f\u8bae\u3002\u52a8\u624b\u524d\u5728 manifest  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[202],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/925"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=925"}],"version-history":[{"count":3,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/925\/revisions"}],"predecessor-version":[{"id":1731,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/925\/revisions\/1731"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}