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我想通过 http 响应中的 post 方法将数据从我们的 android 应用程序传递到网站。

我现在想要的是-我给一个添加按钮，如果我单击添加它会打开一个编辑活动，其中包含编辑文本和保存按钮，输入一些数据或文本并单击保存按钮，它必须转到网站，我也不再需要 db。从我们的应用程序中发送或发布网站数据。

Mainactivity.java

public class MainActivity extends ListActivity implements FetchDataListener
{
    private static final int ACTIVITY_CREATE=0;
    private ProgressDialog dialog;
    private ProjectsDbAdapter mDbHelper;
    private SimpleCursorAdapter dataAdapter;


    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        //setContentView(R.layout.activity_list_item);  
         mDbHelper = new ProjectsDbAdapter(this);
            mDbHelper.open();
            //fillData();
            //registerForContextMenu(getListView());
        initView();
    }



    private void initView()
    {
        // show progress dialog
        dialog = ProgressDialog.show(this, "", "Loading...");
        String url = "http://floating-wildwood-1154.herokuapp.com/posts.json";
        FetchDataTask task = new FetchDataTask(this);
        task.execute(url);

        mDbHelper.open();   
        Cursor projectsCursor = mDbHelper.fetchAllProjects();
        //startManagingCursor(projectsCursor);

        // Create an array to specify the fields we want to display in the list (only TITLE)
        String[] from = new String[]{ProjectsDbAdapter.KEY_TITLE};

        // and an array of the fields we want to bind those fields to (in this case just text1)
        int[] to = new int[]{R.id.text1};

        /* Now create a simple cursor adapter and set it to display
        SimpleCursorAdapter projects = 
                new SimpleCursorAdapter(this, R.layout.activity_row, projectsCursor, from, to);
        setListAdapter(projects);
        */
        // create the adapter using the cursor pointing to the desired data 
        //as well as the layout information
         dataAdapter  = new SimpleCursorAdapter(
          this, R.layout.activity_row, 
          projectsCursor, 
          from, 
          to,
          0);
         setListAdapter(dataAdapter);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        //getMenuInflater().inflate(R.menu.activity_main, menu);
        super.onCreateOptionsMenu(menu);
         MenuInflater mi = getMenuInflater();
            mi.inflate(R.menu.activity_main, menu); 
        return true;

    }

     @Override
        public boolean onMenuItemSelected(int featureId, MenuItem item) {

                createProject();

            return super.onMenuItemSelected(featureId, item);
     }

     private void createProject() {
            Intent i = new Intent(this, ProjectEditActivity.class);
            startActivityForResult(i, ACTIVITY_CREATE);   
        }

     @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
            super.onActivityResult(requestCode, resultCode, intent);
            initView();
        }

    @Override
    public void onFetchComplete(List<Application> data)
    {
        // dismiss the progress dialog
        if ( dialog != null )
            dialog.dismiss();
        // create new adapter
        ApplicationAdapter adapter = new ApplicationAdapter(this, data);
        // set the adapter to list
        setListAdapter(adapter);
    }

    @Override
    public void onFetchFailure(String msg)
    {
        // dismiss the progress dialog
        if ( dialog != null )
            dialog.dismiss();
        // show failure message
        Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
    }
}

项目编辑活动.java

public class ProjectEditActivity extends Activity {
    private EditText mTitleText;
     private Button mConfirmButton;
     private Long mRowId;
     private ProjectsDbAdapter mDbHelper;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
         mDbHelper = new ProjectsDbAdapter(this);
        setContentView(R.layout.activity_project_edit);

         mTitleText = (EditText) findViewById(R.id.title);
         mConfirmButton = (Button) findViewById(R.id.confirm);

        mRowId = savedInstanceState != null ? savedInstanceState.getLong(ProjectsDbAdapter.KEY_ROWID) 
                                            : null;
        registerButtonListenersAndSetDefaultText();
    }
    private void setRowIdFromIntent() {
        if (mRowId == null || mRowId.longValue() == 0) {
            Bundle extras = getIntent().getExtras();            
            mRowId = extras != null ? extras.getLong(ProjectsDbAdapter.KEY_ROWID) 
                                    : null;

        }
    }

     @Override
        protected void onPause() {
            super.onPause();
            mDbHelper.close(); 
        }
     @Override
        protected void onResume() {
            super.onResume();
            mDbHelper.open(); 
            setRowIdFromIntent();
            populateFields();
        }

     private void registerButtonListenersAndSetDefaultText() {
         mConfirmButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    saveState(); 
                    setResult(RESULT_OK);
                    Toast.makeText(ProjectEditActivity.this, getString(R.string.task_saved_message), Toast.LENGTH_SHORT).show();
                    finish(); 
                }

            });
     }
     private void populateFields()  {
         if (mRowId != null) {
                Cursor Project = mDbHelper.fetchProject(mRowId);
                startManagingCursor(Project);
                mTitleText.setText(Project.getString(
                        Project.getColumnIndexOrThrow(ProjectsDbAdapter.KEY_TITLE)));
                Project.close();
         }
                else {
                    // This is a new task - add defaults from preferences if set. 
                    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); 
                    String defaultTitleKey = getString(R.string.pref_task_title_key);
                    String defaultTitle = prefs.getString(defaultTitleKey, null);
                    if(defaultTitle != null)
                    mTitleText.setText(defaultTitle); 
                }

     }

         @Override
            protected void onSaveInstanceState(Bundle outState) {
                super.onSaveInstanceState(outState);
                outState.putLong(ProjectsDbAdapter.KEY_ROWID, mRowId);
            }

         private void saveState() {
            String title = mTitleText.getText().toString();
            //if (mRowId == null) 
            if (mRowId == null || mRowId.longValue() == 0)
            {

                long id = mDbHelper.createProject(title);
                if (id > 0) {
                    mRowId = id;
                      }
                   } else {
                            mDbHelper.updateProject(mRowId, title);
                      }


                     }

     }

我在这里使用 db，但我不想在我的应用程序中使用 db，无论我在编辑文本中输入什么，然后单击保存按钮后，它必须将数据传递或发送到服务器，我该怎么做我的应用程序。

4

3 回答 3

1

要将数据发送到网站，您可以尝试在点击侦听器上调用此函数：

    protected void sendDatas() {
    mRegisterTask = new AsyncTask<Void, Void, Void>() {

        @Override
        protected Void doInBackground(Void... params) {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("YourURL");


            try {
                // Add your data
                List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);//Modify this number with the number of parameter you want to send
                nameValuePairs.add(new BasicNameValuePair("PostParamName", "PostParamValue"));
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

                // Execute HTTP Post Request
                HttpResponse httpResponse = httpclient.execute(httppost);
                // JSON parse
                String response = EntityUtils.toString(httpResponse.getEntity());
                Log.i("httpResponse", response);
                                    //do something with response if needed

            } catch (ClientProtocolException e) {
                Log.e("httpclient", "Error ClientProtocolException: " + e.getMessage());
            } catch (IOException e) {
                Log.e("httpclient", "Error IOException: " + e.getMessage());
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            mRegisterTask = null;
        }

    };
    mRegisterTask.execute(null, null, null);

}

AsyncTask<Void, Void, Void> mRegisterTask; 像希望这个帮助一样声明 mRegisterTask 。

于 2013-05-27T08:10:53.930 回答
1

这是一个发送帖子到服务器的方法：

   public String sendPostRequest(String url) {
        String result = null;
        URI wrapperUrl;
        try {
            wrapperUrl = new URI(url);
            HttpParams httpParameters = new BasicHttpParams();
            int timeoutConnection = 20000;
            HttpConnectionParams.setConnectionTimeout(httpParameters,
                timeoutConnection);
            // Set the default socket timeout (SO_TIMEOUT)
            // in milliseconds which is the timeout for waiting for data.
            int timeoutSocket = 20000;
            HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
            HttpPost post = new HttpPost(wrapperUrl);
            post.setParams(httpParameters);
            HttpResponse response = getDefaultClient().execute(post);
            HttpEntity responseEntity = response.getEntity();
            String result = EntityUtils.toString(responseEntity);
            responseEntity.consumeContent();
            result = new JSONObject(jsonResultString);
        } catch (URISyntaxException e) {
            Logger.debug(TAG, "Exception: " + e.toString());
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            Logger.debug(TAG, "Exception: " + e.toString());
            e.printStackTrace();
        } catch (IOException e) {
            Logger.debug(TAG, "Exception: " + e.toString());
            e.printStackTrace();
        }
        return result;
    }

提醒，在工作线程中使用它：

 private void registerButtonListenersAndSetDefaultText() {
         mConfirmButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    saveState();
                    sendQuestToServer();
                    setResult(RESULT_OK);
                    Toast.makeText(ProjectEditActivity.this, getString(R.string.task_saved_message), Toast.LENGTH_SHORT).show();
                    finish(); 
                }

            });
     }

private void sendQuestToServer() {
    new Thread(new Runnale() {
         @Override void run() {
            String url = yourServerUrl + youreditText.getText.toString();
            sendQuestToServer(url);
         }
    }).start();
}
于 2013-05-27T08:11:36.507 回答
0 
Use the HttpClient  or  HttpPost; 
like this
HttpPost post = new HttpPost(serverURL);
        HttpResponse response = new DefaultHttpClient().execute(post);
        int sCode = response.getStatusLine().getStatusCode();
        if (sCode == HttpStatus.SC_OK) {
            return response.getEntity();
        } else
            throw new Exception("StatusCode is " + sCode);
于 2013-05-27T08:13:38.780 回答