上传图片从机器人到PHP服务器 [英] Uploading Image from android to PHP server
本文介绍了上传图片从机器人到PHP服务器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在我的应用程序，我上传图片，从我的设备到本地Web服务器... 执行codeA .jpg文件后，被在服务器上创建，但它并没有被打开。 和在服务器中的文件的大小是从原始文件不同
Android的活动： -
公共类MainActivity延伸活动{
私有静态诠释RESULT_LOAD_IMAGE = 1;
@覆盖
保护无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）;
按钮btnSelectImage =（按钮）findViewById（R.id.uploadButton）;
btnSelectImage.setOnClickListener（新OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
意图I =新的意图（Intent.ACTION_PICK，android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI）;
startActivityForResult（ⅰ，RESULT_LOAD_IMAGE）;
}
}）;
}
@覆盖
保护无效onActivityResult（INT申请code，INT结果code，意图数据）{
// TODO自动生成方法存根
super.onActivityResult（要求code，因此code，数据）;
如果（要求code == RESULT_LOAD_IMAGE和放大器;＆安培;结果code == RESULT_OK和放大器;＆安培;！数据= NULL）{
乌里selectedImage = data.getData（）;
的String [] filePathColumn = {MediaStore.Images.Media.DATA};
光标光标= getContentResolver（）查询（selectedImage，filePathColumn，NULL，NULL，NULL）;
cursor.moveToFirst（）;
INT参数：columnIndex = cursor.getColumnIndex（filePathColumn [0]）;
字符串picturePath = cursor.getString（参数：columnIndex）;
cursor.close（）;
点阵位图= BitmapFactory.de codeFILE（picturePath）;
ImageView的IM =（ImageView的）findViewById（R.id.imgBox）;
im.setImageBitmap（位）;
/ *
*将图像转换为字符串
* * /
ByteArrayOutputStream流=新ByteArrayOutputStream（）;
bitmap.com preSS（Bitmap.Com pressFormat.PNG，90，流）; // COM preSS到你想要的格式。
byte []的byte_arr = stream.toByteArray（）;
字符串image_str = Base64.en codeToString（byte_arr，Base64.DEFAULT）;
/ *
*创建一个名称值对的图像串要传递给服务器
* * /
ArrayList的＆LT;的NameValuePair＆GT; namevaluepairs中=新的ArrayList＆LT;的NameValuePair＆GT;（）;
nameValuePairs.add（新BasicNameValuePair（形象，image_str））;
JSONObject的jsonString =新的JSONObject（）;
尝试 {
jsonString.put（IMG，image_str）;
}赶上（JSONException E）{
// TODO自动生成的catch块
e.printStackTrace（）;
}
新uploadImageToPhp（）执行（jsonString）;
}
}
@覆盖
公共布尔onCreateOptionsMenu（功能菜单）{
//充气菜单;这增加了项目操作栏，如果它是present。
。getMenuInflater（）膨胀（R.menu.main，菜单）;
返回true;
}
公共类uploadImageToPhp扩展的AsyncTask＆LT; JSONObject的，太虚，太虚＆GT;
{
字符串dataToSend = NULL;
公共静态最后弦乐preFIX =HTTP：//; // $ P $的网址PFIX
公共静态最后弦乐SERVER_IP =172.16.26.155; // IP地址所在的PHP服务器位于
公共静态最后弦乐completeServerAddress = preFIX + SERVER_IP +/ test_upload / upload_image.php; //在PHP文件的精确位置
@覆盖
保护无效doInBackground（JSONObject的... PARAMS）{
dataToSend =形象=+参数[0];
通讯（completeServerAddress，dataToSend）;
返回null;
}
公共无效的沟通（字符串urlString，字符串dataToSend2）
{
字符串结果= NULL;
尝试
{
网址URL =新的URL（urlString）;
URLConnection的康恩= url.openConnection（）;
HttpURLConnection的httpConn =（HttpURLConnection类），康涅狄格州;
httpConn.setRequestProperty（接受，应用/ JSON）;
httpConn.setRequestProperty（接收字符集，UTF-8）;
httpConn.setRequestMethod（POST）;
httpConn.connect（）;
//创建一个输出流数据发送给服务器
OutputStreamWriter OUT =新OutputStreamWriter（httpConn.getOutputStream（））;
out.write（dataToSend2）;
了out.flush（）;
INT则httpStatus = httpConn.getResponse code（）;
的System.out.println（HTTP状态：+则httpStatus）;
如果（则httpStatus == HttpURLConnection.HTTP_OK）
{
Log.d（HTTP状态，HTTP连接成功）;
的BufferedReader在=新的BufferedReader（新的InputStreamReader（httpConn.getInputStream（），UTF-8））;
StringBuilder的SB =新的StringBuilder（）;
字符串inputLine;
而（（inputLine = in.readLine（））！= NULL）
{
的System.out.println（inputLine）;
sb.append（inputLine +\ N）;
}
附寄（）;
结果= sb.toString（）;
尝试
{
// jsonResult =新的JSONObject的（结果）;
}
赶上（例外五）
{
Log.e（JSON解析器，错误分析数据+ e.toString（））;
}
}
其他
{
的System.out.println（财产以后出了问题）;
}
}赶上（MalformedURLException异常E）{
// TODO自动生成的catch块
e.printStackTrace（）;
}赶上（IOException异常E）{
// TODO自动生成的catch块
e.printStackTrace（）;
}
}
}
}
PHP code： -
$ recievedJson = $ _ REQUEST ['形象'];
$ imageContent = json_de code（$ recievedJson，真正的）;
$基地= $ imageContent [IMG];
$二进制= base64_de code（$基地）;
回声$二进制;
标题（内容类型：位图;字符集= UTF-8）;
$文件=的fopen（'uploaded_image.jpg，世行）;
FWRITE（$文件，$二）;
fclose函数（$文件）;
解决方案
使用低于code。它会做同样的。
公共类UploadImage延伸活动{
InputStream中的InputStream;
@覆盖
公共无效的onCreate（包冰柱）{
super.onCreate（冰柱）;
的setContentView（R.layout.main）;
点阵位图= BitmapFactory.de codeResource（getResources（），R.drawable.icon）; ByteArrayOutputStream流=新ByteArrayOutputStream（）;
bitmap.com preSS（Bitmap.Com pressFormat.PNG，90，流）; // COM preSS到你想要的格式。
byte []的byte_arr = stream.toByteArray（）;
字符串image_str = Base64.en codeBytes（byte_arr）;
ArrayList的＆LT;的NameValuePair＆GT; namevaluepairs中=新的ArrayList＆LT;的NameValuePair＆GT;（）;
nameValuePairs.add（新BasicNameValuePair（形象，image_str））;
线程t =新主题（新的Runnable（）{
@覆盖
公共无效的run（）{
尝试{
HttpClient的HttpClient的=新DefaultHttpClient（）;
HttpPost httppost =新HttpPost（服务器的链接/文件夹名称/ upload_image.php）;
httppost.setEntity（新UrlEn codedFormEntity（namevaluepairs中））;
HTT presponse响应= httpclient.execute（httppost）;
串the_string_response = convertResponseToString（响应）;
runOnUiThread（新的Runnable（）{
@覆盖
公共无效的run（）{
Toast.makeText（UploadImage.this，响应+ the_string_response，Toast.LENGTH_LONG）.show（）;
}
}）;
}赶上（例外五）{
runOnUiThread（新的Runnable（）{
@覆盖
公共无效的run（）{
Toast.makeText（UploadImage.this，ERROR+ e.getMessage（），Toast.LENGTH_LONG）.show（）;
}
}）;
的System.out.println（在HTTP连接错误+ e.toString（））;
}
}
}）;
t.start（）;
}
公共字符串convertResponseToString（Htt的presponse响应）抛出IllegalStateException异常，IOException异常{
字符串资源=;
StringBuffer的缓冲区=新的StringBuffer（）;
的InputStream = response.getEntity（）的getContent（）。
INT CONTENTLENGTH =（int）的response.getEntity（）getContentLength（）。 //获取内容长度... ..
runOnUiThread（新的Runnable（）{
@覆盖
公共无效的run（）{
Toast.makeText（UploadImage.thisCONTENTLENGTH：+ CONTENTLENGTH，Toast.LENGTH_LONG）.show（）;
}
}）;
如果（CONTENTLENGTH℃，）{
}
其他{
byte []的数据=新的字节[512];
INT的len = 0;
尝试
{
而（-1！=（LEN = inputStream.read（数据）））
{
buffer.append（新的字符串（data，0，len个））; //转换为字符串，并追加到StringBuffer的... ..
}
}
赶上（IOException异常E）
{
e.printStackTrace（）;
}
尝试
{
inputStream.close（）; //关闭流......
}
赶上（IOException异常E）
{
e.printStackTrace（）;
}
RES = buffer.toString（）; //转换StringBuffer来串... ..
runOnUiThread（新的Runnable（）{
@覆盖
公共无效的run（）{
Toast.makeText（UploadImage.this，结果：+资源，Toast.LENGTH_LONG）.show（）;
}
}）;
//System.out.println("Response =＆gt;中+ EntityUtils.toString（response.getEntity（）））;
}
返回水库;
}
}
PHP code
＆LT; PHP
$基地= $ _ REQUEST ['形象'];
$二进制= base64_de code（$基地）;
标题（内容类型：位图;字符集= UTF-8）;
$文件=的fopen（'uploaded_image.jpg，世行）;
FWRITE（$文件，$二）;
fclose函数（$文件）;
回声图片上传完成！，请检查你的PHP文件目录......;
？＆GT;
In my app i am uploading an image from my device to a local web server... after executing the code a .jpg file gets created in the server but it does not gets opened. And the size of the file in server is different from the original file.
Android activity:--
public class MainActivity extends Activity {
private static int RESULT_LOAD_IMAGE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnSelectImage=(Button) findViewById(R.id.uploadButton);
btnSelectImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i=new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && data!=null) {
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();
Bitmap bitmap=BitmapFactory.decodeFile(picturePath);
ImageView im = (ImageView) findViewById(R.id.imgBox);
im.setImageBitmap(bitmap);
/*
* Convert the image to a string
* */
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream); //compress to which format you want.
byte [] byte_arr = stream.toByteArray();
String image_str = Base64.encodeToString(byte_arr,Base64.DEFAULT);
/*
* Create a name value pair for the image string to be passed to the server
* */
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("image",image_str));
JSONObject jsonString=new JSONObject();
try {
jsonString.put("img", image_str);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new uploadImageToPhp().execute(jsonString);
}
}
@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 class uploadImageToPhp extends AsyncTask<JSONObject, Void, Void>
{
String dataToSend=null;
public static final String prefix="http://"; //prefix of the urls
public static final String server_ip="172.16.26.155"; //the ip address where the php server is located
public static final String completeServerAddress=prefix+server_ip+"/test_upload/upload_image.php"; //Exact location of the php files
@Override
protected Void doInBackground(JSONObject... params) {
dataToSend="image="+params[0];
communicator(completeServerAddress, dataToSend);
return null;
}
public void communicator(String urlString,String dataToSend2)
{
String result=null;
try
{
URL url=new URL(urlString);
URLConnection conn=url.openConnection();
HttpURLConnection httpConn=(HttpURLConnection) conn;
httpConn.setRequestProperty("Accept", "application/json");
httpConn.setRequestProperty("accept-charset", "UTF-8");
httpConn.setRequestMethod("POST");
httpConn.connect();
//Create an output stream to send data to the server
OutputStreamWriter out=new OutputStreamWriter(httpConn.getOutputStream());
out.write(dataToSend2);
out.flush();
int httpStatus = httpConn.getResponseCode();
System.out.println("Http status :"+httpStatus);
if(httpStatus==HttpURLConnection.HTTP_OK)
{
Log.d("HTTP STatus", "http connection successful");
BufferedReader in = new BufferedReader(new InputStreamReader(httpConn.getInputStream(),"UTF-8"));
StringBuilder sb = new StringBuilder();
String inputLine;
while ((inputLine = in.readLine()) != null)
{
System.out.println(inputLine);
sb.append(inputLine+"\n");
}
in.close();
result=sb.toString();
try
{
//jsonResult = new JSONObject(result);
}
catch(Exception e)
{
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
}
else
{
System.out.println("Somthing went wrong");
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
PHP code:-
$recievedJson=$_REQUEST['image'];
$imageContent=json_decode($recievedJson,true);
$base=$imageContent["img"];
$binary=base64_decode($base);
echo $binary;
header('Content-Type: bitmap; charset=utf-8');
$file = fopen('uploaded_image.jpg', 'wb');
fwrite($file, $binary);
fclose($file);
解决方案
Use below code. It will do the same.
public class UploadImage extends Activity {
InputStream inputStream;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.icon); ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream); //compress to which format you want.
byte [] byte_arr = stream.toByteArray();
String image_str = Base64.encodeBytes(byte_arr);
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("image",image_str));
Thread t = new Thread(new Runnable() {
@Override
public void run() {
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("server-link/folder-name/upload_image.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
String the_string_response = convertResponseToString(response);
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(UploadImage.this, "Response " + the_string_response, Toast.LENGTH_LONG).show();
}
});
}catch(Exception e){
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(UploadImage.this, "ERROR " + e.getMessage(), Toast.LENGTH_LONG).show();
}
});
System.out.println("Error in http connection "+e.toString());
}
}
});
t.start();
}
public String convertResponseToString(HttpResponse response) throws IllegalStateException, IOException{
String res = "";
StringBuffer buffer = new StringBuffer();
inputStream = response.getEntity().getContent();
int contentLength = (int) response.getEntity().getContentLength(); //getting content length…..
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(UploadImage.this, "contentLength : " + contentLength, Toast.LENGTH_LONG).show();
}
});
if (contentLength < 0){
}
else{
byte[] data = new byte[512];
int len = 0;
try
{
while (-1 != (len = inputStream.read(data)) )
{
buffer.append(new String(data, 0, len)); //converting to string and appending to stringbuffer…..
}
}
catch (IOException e)
{
e.printStackTrace();
}
try
{
inputStream.close(); // closing the stream…..
}
catch (IOException e)
{
e.printStackTrace();
}
res = buffer.toString(); // converting stringbuffer to string…..
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(UploadImage.this, "Result : " + res, Toast.LENGTH_LONG).show();
}
});
//System.out.println("Response => " + EntityUtils.toString(response.getEntity()));
}
return res;
}
}
PHP Code
<?php
$base=$_REQUEST['image'];
$binary=base64_decode($base);
header('Content-Type: bitmap; charset=utf-8');
$file = fopen('uploaded_image.jpg', 'wb');
fwrite($file, $binary);
fclose($file);
echo 'Image upload complete!!, Please check your php file directory……';
?>
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