Android中使用Apache HttpClient

淩亂°似流年 2022-09-22 14:53 50阅读 0赞

*  Activity.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="top.helloworldes.httpclient.MainActivity">
    
    
        <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:text="访问页面" android:id="@+id/button" android:onClick="accessSecret" />
    
        <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:text="登录" android:id="@+id/button2" android:onClick="showLogin" />
        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/textView" android:text="Hello World!" />
    
        <WebView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/webView" android:layout_gravity="center_horizontal" />
    </LinearLayout>

*  login.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">
    
        <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:orientation="horizontal">
    
            <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="用户名" />
    
            <EditText android:id="@+id/username" android:layout_width="match_parent" android:layout_height="wrap_content" />
        </LinearLayout>
    
        <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:orientation="horizontal">
    
            <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="密码 " />
    
            <EditText android:id="@+id/password" android:layout_width="match_parent" android:layout_height="wrap_content" />
        </LinearLayout>
    
    </LinearLayout>

*  MainActivity.java

public class MainActivity extends AppCompatActivity { 
    
        TextView response;
        HttpClient httpClient;
        WebView webView;
        StringBuilder info = new StringBuilder();
    
        Handler handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                if (msg.what == 0x123) {
    webView.loadDataWithBaseURL(null,info.toString(),"text/html","utf-8",null);
                }
            }
        };
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            httpClient = new DefaultHttpClient();
            response = (TextView) findViewById(R.id.textView);
            webView = (WebView) findViewById(R.id.webView);
    
        }
    
        public void accessSecret(View view) {
            response.setText("");
            new Thread(){
                @Override
                public void run() {
                    HttpGet get = new HttpGet("http://helloworlds.top/Test/login.jsp");
                    try {
                        HttpResponse httpResponse = httpClient.execute(get);
                        HttpEntity entity = httpResponse.getEntity();
                        if (entity != null) {
                            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
                            String line = null;
    
                            while ((line = bufferedReader.readLine()) != null) {
                                Message msg = new Message();
                                msg.what = 0x123;
                                msg.obj = line;
                                handler.sendMessage(msg);
                            }
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }.start();
        }
    
    
        public void showLogin(View view) {
            final View loginDialog = getLayoutInflater().inflate(R.layout.login, null);
    
            new AlertDialog.Builder(MainActivity.this)
                    .setTitle("登录系统")
                    .setView(loginDialog)
                    .setPositiveButton("登录", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            final String name = ((EditText) loginDialog.findViewById(R.id.username)).getText().toString();
                            final String pswd = ((EditText) loginDialog.findViewById(R.id.password)).getText().toString();
    
                            new Thread(){
                                @Override
                                public void run() {
                                    HttpPost post = new HttpPost("http://www.helloworlds.top/Test/login.jsp");
                                    List<NameValuePair> params = new ArrayList<NameValuePair>();
                                    params.add(new BasicNameValuePair("name",name));
                                    params.add(new BasicNameValuePair("pass",pswd));
                                    try {
                                        post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
                                        HttpResponse response = httpClient.execute(post);
                                        if (response.getStatusLine().getStatusCode() == 200) {
                                            String msg = EntityUtils.toString(response.getEntity());
                                            Looper.prepare();
    
                                            Message message = new Message();
                                            message.obj = msg;
                                            message.what = 0x123;
                                            handler.sendMessage(message);
                                            Looper.loop();
                                        }
                                    } catch (UnsupportedEncodingException e) {
                                        e.printStackTrace();
                                    } catch (ClientProtocolException e) {
                                        e.printStackTrace();
    
                                    } catch (IOException e) {
                                        e.printStackTrace();
                                    }
                                }
                            }.start();
                        }
                    })
                    .setNegativeButton("取消",null)
                    .show();
        }
    }