1

最新更新..我有上传图片的代码..但我不知道这个代码要做什么..？来自http://monstercoda.wordpress.com/2012/04/15/android-image-upload-tutorial-part-i/的源代码

代码如下：

public class MainActivity extends Activity {
Uri currImageURI;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button gallery_btn = (Button)findViewById(R.id.gallerybtn);
    gallery_btn.setOnClickListener(new OnClickListener(){
        public void onClick(View view){
            //to open up a gallery browser
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(Intent.createChooser(intent,"Select Picture.."),1);

            (getRealPathFromURI(currImageURI);
        }

    });



}

// To handle when an image is selected from the browser
public void onActivityResult(int requestCode, int resultCode, Intent data){
    if (resultCode == RESULT_OK) {
        if (requestCode == 1) {
            // currImageURI is the global variable I’m using to hold the content:
            currImageURI = data.getData();
            String s = ("Current image Path is ----->" + getRealPathFromURI(currImageURI));
            TextView tv_path = (TextView) findViewById(R.id.path);
            tv_path.setText(getRealPathFromURI(currImageURI));
        }
 HttpUploader uploader = new HttpUploader();
            try {
                uploader.execute(getRealPathFromURI(currImageURI));
    }
}

//Convert the image URI to the direct file system path of the image file
public String getRealPathFromURI( Uri contentUri) {
    String [] proj={MediaStore.Images.Media.DATA};
    android.database.Cursor cursor = managedQuery(contentUri,
            proj,     // Which columns to return
            null,     // WHERE clause; which rows to return (all rows)
            null,     // WHERE clause selection arguments (none)
            null);     // Order-by clause (ascending by name)
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    String c = cursor.getString(column_index); 
    return c;
}
}

我的 httpUploader 就像他们提供的一样简单：

public class HttpUploader extends AsyncTask<String, Void, String> {

 protected String doInBackground(String... path) {

     String outPut = null;

     for (String sdPath : path) {

         Bitmap bitmapOrg = BitmapFactory.decodeFile(sdPath);
         ByteArrayOutputStream bao = new ByteArrayOutputStream();

         //Resize the image
         double width = bitmapOrg.getWidth();
         double height = bitmapOrg.getHeight();
         double ratio = 400/width;
         int newheight = (int)(ratio*height);

         System.out.println("———-width" + width);
         System.out.println("———-height" + height);

         bitmapOrg = Bitmap.createScaledBitmap(bitmapOrg, 400, newheight, true);

         //Here you can define .PNG as well
         bitmapOrg.compress(Bitmap.CompressFormat.JPEG, 95, bao);
         byte[] ba = bao.toByteArray();
         String ba1=Base64.encodeBytes(ba);

         String k = "uploading image now ——–" + ba1 ;
         Log.e("k contains", k);

         ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
         //store path for image name and id for each profile id.
         nameValuePairs.add(new BasicNameValuePair("image", ba1));
         nameValuePairs.add(new BasicNameValuePair("path", sdPath));
         nameValuePairs.add(new BasicNameValuePair("id", id));

         try {
             HttpClient httpclient = new DefaultHttpClient();
             HttpPost httppost = new HttpPost("192.168.1.1/upload.php"); // which request for $_POST['image'];
             httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

             HttpResponse response = httpclient.execute(httppost);
             HttpEntity entity = response.getEntity();                

             // print responce
             outPut = EntityUtils.toString(entity);
             Log.i("GET RESPONSE—-", outPut);

             //is = entity.getContent();
             Log.e("log_tag ******", "good connection");

             bitmapOrg.recycle();

         } catch (Exception e) {
             Log.e("log_tag ******", "Error in http connection " + e.toString());
         }
     }
     return outPut;
 }      
 }

PHP文件保存到数据库： 

 if (isset($base)) {
$base = $_REQUEST["image"];
$filepath = $_REQUEST["path"];
$id = $_REQUEST["id"];

 $image_name = "/image/".$filepath;

 // base64 encoded utf-8 string
 $binary = base64_decode($base);

 // binary, utf-8 bytes

header("Content-Type: bitmap; charset=utf-8");

 $file = fopen($image_name, "wb");

fwrite($file, $binary);

fclose($file);

$result = "UPDATE profile SET image = '$image_name' WHERE RID = '$id'");

if(mysql_affected_rows > 0){
echo json_encode ("success!");
}else{
echo json_encode ("failed!");
}

} else {

die("No POST");
}

?>

或者如果代码不合适......可以为初学者提供任何指导吗？那里有太多版本的代码..我可以稍微理解这一点，因为它比其他版本更简单。

4

1 回答 1

0

.get()从您的asynctask通话中删除。放入HttpUploader uploader = new HttpUploader();和Object image_name = uploader.execute(getRealPathFromURI(currImageURI)); 没有.get()in onActivityResult()。因为只有onActivityResult()你知道文件名。

于 2013-03-23T07:34:40.067 回答