如何使用android系统中发送数据 [英] how to use to send data in android

问题描述

• 有人能解释什么是参与实现这一
进程

• 一个循序渐进一步一个新手了解


• 所有我试图做的是试图发送一个单一的形象

任何好的链接，参考学习这个话题时，如博客或教程的

Any good links to refer to learn this topic , like blogs or tutorials

我已经审阅本链接

MainActivity.java

public class MainActivity extends Activity {

    Button submit, uplodbtn;
    EditText name, City;
    ProgressDialog pDialog;
    ImageView iv;
    private Bitmap bitmap;

    private static final int PICK_IMAGE = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        submit = (Button) findViewById(R.id.SUBMIT_BUTTON_ID);
        name = (EditText) findViewById(R.id.NAME_EDIT_TEXT_ID);
        City = (EditText) findViewById(R.id.CITY_EDIT_TEXT_ID);
        iv = (ImageView) findViewById(R.id.imageView1);
        uplodbtn = (Button) findViewById(R.id.button1);

        submit.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                new MainTest().execute();

                // }
            }
        });

        iv.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                selectImageFromGallery();
            }
        });

        uplodbtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                new ImageUploadTask().execute();

            }
        });
    }

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

        if (requestCode == PICK_IMAGE && resultCode == RESULT_OK
                && null != data) {
            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };

            Cursor cursor = getContentResolver().query(selectedImage,
                    filePathColumn, null, null, null);
            cursor.moveToFirst();

            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();

            decodeFile(picturePath);

        }
    }

    public void decodeFile(String filePath) {
        // Decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(filePath, o);

        // The new size we want to scale to
        final int REQUIRED_SIZE = 1024;

        // Find the correct scale value. It should be the power of 2.
        int width_tmp = o.outWidth, height_tmp = o.outHeight;
        int scale = 1;
        while (true) {
            if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)
                break;
            width_tmp /= 2;
            height_tmp /= 2;
            scale *= 2;
        }

        // Decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        bitmap = BitmapFactory.decodeFile(filePath, o2);

        iv.setImageBitmap(bitmap);
    }

    public void selectImageFromGallery() {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"),
                PICK_IMAGE);
    }

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

    public void postData() {
        // Create a new HttpClient and Post Header

        // You can use NameValuePair for add data to post server and yes you can
        // also append your desire data which you want to post server.

        // Like:
        // yourserver_url+"name="+name.getText().toString()+"city="+City.getText().toString()
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("Your Server URL");

        try {
            // Add your data
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
            nameValuePairs.add(new BasicNameValuePair("Name", name.getText()
                    .toString()));
            nameValuePairs.add(new BasicNameValuePair("city", City.getText()
                    .toString()));
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            // Execute HTTP Post Request
            HttpResponse response = httpclient.execute(httppost);
            Log.v("Response", response.toString());

        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
        } catch (IOException e) {
            // TODO Auto-generated catch block
        }
    }

    public class MainTest extends AsyncTask<String, Integer, String> {

        @Override
        protected void onPreExecute() {
            pDialog = new ProgressDialog(MainActivity.this);
            pDialog.setMessage("Loading..");
            pDialog.setIndeterminate(true);
            pDialog.setCancelable(false);
            pDialog.show();
        }

        @Override
        protected String doInBackground(String... params) {

            postData();

            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            // TODO Auto-generated method stub

            super.onPostExecute(result);
            // data=jobj.toString();
            pDialog.dismiss();

        }

    }

    class ImageUploadTask extends AsyncTask<Void, Void, String> {
        private String webAddressToPost = "http://your-website-here.com";

        // private ProgressDialog dialog;
        private ProgressDialog dialog = new ProgressDialog(MainActivity.this);

        @Override
        protected void onPreExecute() {
            dialog.setMessage("Uploading...");
            dialog.show();
        }

        @Override
        protected String doInBackground(Void... params) {
            try {
                HttpClient httpClient = new DefaultHttpClient();
                HttpContext localContext = new BasicHttpContext();
                HttpPost httpPost = new HttpPost(webAddressToPost);

                MultipartEntity entity = new MultipartEntity(
                        HttpMultipartMode.BROWSER_COMPATIBLE);

                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                bitmap.compress(CompressFormat.JPEG, 100, bos);
                byte[] data = bos.toByteArray();
                String file = Base64.encodeToString(data, 0);
                entity.addPart("uploaded", new StringBody(file));

                entity.addPart("someOtherStringToSend", new StringBody(
                        "your string here"));

                httpPost.setEntity(entity);
                HttpResponse response = httpClient.execute(httpPost,
                        localContext);
                BufferedReader reader = new BufferedReader(
                        new InputStreamReader(
                                response.getEntity().getContent(), "UTF-8"));

                String sResponse = reader.readLine();
                return sResponse;
            } catch (Exception e) {
                // something went wrong. connection with the server error
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            dialog.dismiss();
            Toast.makeText(getApplicationContext(), "file uploaded",
                    Toast.LENGTH_LONG).show();
        }

    }

}

activity_main.xml中

<RelativeLayout 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: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=".MainActivity" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="24dp"
        android:layout_marginTop="32dp"
        android:clickable="false"
        android:src="@drawable/ic_launcher" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@+id/imageView1"
        android:text="Click to upload Image"
        android:textSize="15dp" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/NAME_EDIT_TEXT_ID"
        android:layout_alignParentLeft="true"
        android:clickable="false"
        android:text="NAME"
        android:textSize="20dp"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/NAME_EDIT_TEXT_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/CITY_EDIT_TEXT_ID"
        android:layout_alignRight="@+id/button1"
        android:layout_marginBottom="30dp"
        android:ems="10" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/CITY_EDIT_TEXT_ID"
        android:layout_alignLeft="@+id/textView2"
        android:clickable="false"
        android:text="CITY"
        android:textSize="20dp"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/CITY_EDIT_TEXT_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/NAME_EDIT_TEXT_ID"
        android:layout_centerVertical="true"
        android:ems="10" />

    <Button
        android:id="@+id/SUBMIT_BUTTON_ID"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="47dp"
        android:text="SUBMIT" />

</RelativeLayout>

---

我也有类 Base64.java 如在博客中提到

错误，我有：

entity.addPart("uploaded", new StringBody(file));

entity.addPart("someOtherStringToSend", new StringBody("your string here"));

的字符串的身体不能解析为一个类型的

MultipartEntity entity = new MultipartEntity( HttpMultipartMode.BROWSER_COMPATIBLE);

的多部分实体不能被解析为一个类型的

Description Resource    Path    Location    Type
Project 'DataPostingProject' is missing required library: 'C:\Users\admin\Downloads\httpmime-4.1-beta1.jar\httpmime-4.1-beta1.jar'  DataPostingProject      Build path  Build Path Problem

如何纠正自己

推荐答案

这是因为你已经失踪多部分实体Jar文件.....

This is Because you have missing Multipart Entity Jar file.....

添加 httpmime 4.0.1 jar文件到您的项目.....

Add httpmime 4.0.1 jar file to your project.....

这个文件添加到您的项目.....

Add this file to your Project.....

右键单击项目 - > 属性 - > Android的Java构建路径 - > 添加外部JAR - > jar文件的路径选择后 - > 最后确定

Right Click Project -> Properties -> Android Java Build Path ->Add External Jar -> after select path of jar file -> Finally OK.

这篇关于如何使用android系统中发送数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！