Android上传图片至java服务器
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import .;
import ;
import .Base64;
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@SuppressLint("NewApi")
public class UploadActivity extends AppCompatActivity implements View.OnClickListener {
private EditText editTextName;
private ProgressDialog prgDialog;
private int RESULT_LOAD_IMG = 1;
private RequestParams params = new RequestParams();
private String encodedString;
private Bitmap bitmap;
private String imgPath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(.activity_main);
prgDialog= new ProgressDialog(this);
(false);
editTextName = (EditText) findViewById();
findViewById(.choose_image).setOnClickListener(this);
findViewById(.upload_image).setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (()) {
case .choose_image:
loadImage();
break;
case .upload_image:
uploadImage();
break;
}
}
public void loadImage() {
//这里就写了从相册中选择图片，相机拍照的就略过了
Intent galleryIntent = new Intent(Intent.ACTION_PICK,
.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
}
//当图片被选中的返回结果
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK && null != data) {
Uri selectedImage = ();
String[] filePathColumn = { };
// 获取游标
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
();
int columnIndex = (filePathColumn[0]);
imgPath = (columnIndex);
();
ImageView imgView = (ImageView) findViewById();
((imgPath));
} else {
(this, "You haven't picked Image",
Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
(this, "Something went wrong", Toast.LENGTH_LONG).show();
}
}
//开始上传图片
private void uploadImage() {
if (imgPath != null && !()) {
("Converting Image to Binary Data");
();
encodeImagetoString();
} else {
(getApplicationContext(), "You must select image from gallery before you try to upload",
Toast.LENGTH_LONG).show();
}
}
public void encodeImagetoString() {
new AsyncTask<Void, Void, String>() {
protected void onPreExecute() {
};
@Override
protected String doInBackground(Void... params) {
options = null;
options = new ();
= 3;
bitmap = (imgPath,
options);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
// 压缩图片
(, 50, stream);
byte[] byte_arr = ();
// Base64图片转码为String
encodedString = (byte_arr, 0);
return "";
}
@Override
protected void onPostExecute(String msg) {
("Calling Upload");
// 将转换后的图片添加到上传的参数中
("image", encodedString);
("filename", ().toString());
// 上传图片
imageUpload();
}
}.execute(null, null, null);
}
public void imageUpload() {
("Invoking JSP");
String url = "http://172.18.2.73:8080/upload/";
AsyncHttpClient client = new AsyncHttpClient();
(url, params, new AsyncHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, byte[] bytes) {
();
(getApplicationContext(), "upload success", Toast.LENGTH_LONG).show();
}
@Override
public void onFailure(int statusCode, Header[] headers, byte[] bytes, Throwable throwable) {
();
if (statusCode == 404) {
(getApplicationContext(),
"Requested resource not found", Toast.LENGTH_LONG).show();
}
// 当 Http 响应码'500'
else if (statusCode == 500) {
(getApplicationContext(),
"Something went wrong at server end", Toast.LENGTH_LONG).show();
}
// 当 Http 响应码 404, 500
else {
(
getApplicationContext(), "Error Occured n Most Common Error: n1. Device " +
"not connected to Internetn2. Web App is not deployed in App servern3." +
" App server is not runningn HTTP Status code : "
+ statusCode, Toast.LENGTH_LONG).show();
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
if (prgDialog != null) {
prgDialog .dismiss();
}
}
}