5数据的上传

package com.example.myapplication;
import static com.loopj.android.http.AsyncHttpClient.LOG_TAG;

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.AsyncTask;
import android.provider.MediaStore;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;


import java.io.ByteArrayOutputStream;
import cz.msebera.android.httpclient.Header;
@SuppressLint("NewApi")
public class cream00 extends AppCompatActivity implements View.OnClickListener {
    private EditText editTextName0;
    private EditText editTextName1;
    private EditText editTextName2;
    private EditText editTextName3;
    private ProgressDialog prgDialog;
    private int RESULT_LOAD_IMG = 1;
    private int RESULT_TAKE_IMG = 2;
    private RequestParams params = new RequestParams();
    private String encodedString;
    private Bitmap bitmap;
    private String imgPath;

    private static final int WRITE_PERMISSION = 0x01;
    private static final int CREAM_PERMISSION = 0x01;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.cream00);

        requestWritePermission();
        prgDialog= new ProgressDialog(this);
        prgDialog.setCancelable(false);
        editTextName0 = (EditText) findViewById(R.id.editText0);
        editTextName1 = (EditText) findViewById(R.id.editText1);
        editTextName2 = (EditText) findViewById(R.id.editText2);
        editTextName3 = (EditText) findViewById(R.id.editText3);
        findViewById(R.id.choose_image).setOnClickListener(this);
        findViewById(R.id.upload_image).setOnClickListener(this);
        findViewById(R.id.take_image).setOnClickListener(this);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == WRITE_PERMISSION) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Log.d(LOG_TAG, "Write Permission Failed");
                Toast.makeText(this, "You must allow permission write external storage to your mobile device.", Toast.LENGTH_SHORT).show();
                finish();
            }
        }
    }

    private void requestWritePermission(){
        if(checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},WRITE_PERMISSION);
        }
        if(checkSelfPermission(Manifest.permission.CAMERA)!= PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.CAMERA},CREAM_PERMISSION);
        }
    }
    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.choose_image:
                loadImage();
                break;
            case R.id.upload_image:
                uploadImage();
                break;
            case R.id.take_image:
                takeImage();
                break;
        }
    }
    public void takeImage() {
//这里就写了从相册中选择图片，相机拍照的就略过了
        Intent takeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        Log.d("camera", "takeImage: ok0");
        startActivityForResult(takeIntent, RESULT_TAKE_IMG);
        Log.d("camera", "takeImage: ok2");
    }
    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,
                android.provider.MediaStore.Images.Media.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 {
            Log.d("camera", "takeImage: ok3");
            if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK && null != data) {
                Log.d("camera", "takeImage: ok4");
                Uri selectedImage = data.getData();
                String[] filePathColumn = { MediaStore.Images.Media.DATA };
// 获取游标
                Log.d("camera", "takeImage: ok5");
                Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
                cursor.moveToFirst();

                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                imgPath = cursor.getString(columnIndex);
                cursor.close();
                ImageView imgView = (ImageView) findViewById(R.id.imageView0);
                imgView.setImageBitmap(BitmapFactory.decodeFile(imgPath));
            } else if(requestCode == RESULT_TAKE_IMG && resultCode == RESULT_OK && null != data){
                Bundle extras = data.getExtras();
                Bitmap imageBitmap = (Bitmap) extras.get("data");
                ImageView imgView = (ImageView) findViewById(R.id.imageView0);
                imgView.setImageBitmap(imageBitmap);
            }else {
                Toast.makeText(this, "You haven't picked Image",
                        Toast.LENGTH_LONG).show();
            }
        } catch (Exception e) {
            Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG).show();
        }
    }

    //开始上传图片
    private void uploadImage() {
        if (imgPath != null && !imgPath.isEmpty()) {
            prgDialog.setMessage("Converting Image to Binary Data");
            prgDialog.show();
            encodeImagetoString();
        } else if((ImageView)findViewById(R.id.imageView0)!=null){
            Log.d("camera", "takeImage: ok10086114514");
            prgDialog.setMessage("Converting Image to Binary Data");
            prgDialog.show();
            encodeImagetoString0();
        }else {
            Toast.makeText(getApplicationContext(), "You must select image from gallery before you try to upload",
                    Toast.LENGTH_LONG).show();
        }
    }
    public void encodeImagetoString0() {
        new AsyncTask<Void, Void, String>(){
            protected void onPreExecute() {
            };
            @Override
            protected String doInBackground(Void... params) {
                BitmapFactory.Options options = null;
                options = new BitmapFactory.Options();
                options.inSampleSize = 3;
                ImageView imgView = (ImageView) findViewById(R.id.imageView0);
                bitmap = ((BitmapDrawable)imgView.getDrawable()).getBitmap();

                ByteArrayOutputStream stream = new ByteArrayOutputStream();
// 压缩图片
                bitmap.compress(Bitmap.CompressFormat.PNG, 50, stream);
                byte[] byte_arr = stream.toByteArray();
// Base64图片转码为String
                encodedString = Base64.encodeToString(byte_arr, 0);
                return "";
            }
            @Override
            protected void onPostExecute(String msg) {
                prgDialog.setMessage("Calling Upload");
// 将转换后的图片添加到上传的参数中
                params.put("image", encodedString);
                params.put("leixing", editTextName0.getText().toString());
                params.put("chexing", editTextName1.getText().toString());
                params.put("yanse", editTextName2.getText().toString());
                params.put("chepai", editTextName3.getText().toString());
// 上传图片
                imageUpload();
            }
        }.execute(null, null, null);
    }
    public void encodeImagetoString() {
        new AsyncTask<Void, Void, String>(){
            protected void onPreExecute() {
            };
            @Override
            protected String doInBackground(Void... params) {
                BitmapFactory.Options options = null;
                options = new BitmapFactory.Options();
                options.inSampleSize = 3;
                bitmap = BitmapFactory.decodeFile(imgPath,
                        options);
                ByteArrayOutputStream stream = new ByteArrayOutputStream();
// 压缩图片
                bitmap.compress(Bitmap.CompressFormat.PNG, 50, stream);
                byte[] byte_arr = stream.toByteArray();
// Base64图片转码为String
                encodedString = Base64.encodeToString(byte_arr, 0);
                return "";
            }
            @Override
            protected void onPostExecute(String msg) {
                prgDialog.setMessage("Calling Upload");
// 将转换后的图片添加到上传的参数中
                params.put("image", encodedString);
                params.put("filename", editTextName0.getText().toString());
// 上传图片
                imageUpload();
            }
        }.execute(null, null, null);
    }
    public void imageUpload() {
        prgDialog.setMessage("Invoking");
        String url = "http://43.138.34.77:8080/androidtest/servlet/upload";
        AsyncHttpClient client = new AsyncHttpClient();
        client.post(url, params, new AsyncHttpResponseHandler() {
            @Override
            public void onSuccess(int statusCode, Header[] headers, byte[] bytes) {
                prgDialog.hide();
                Toast.makeText(getApplicationContext(), "upload success", Toast.LENGTH_LONG).show();
            }
            @Override
            public void onFailure(int statusCode, Header[] headers, byte[] bytes, Throwable throwable) {
                prgDialog.hide();
                if (statusCode == 404) {
                    Toast.makeText(getApplicationContext(),
                            "Requested resource not found", Toast.LENGTH_LONG).show();
                }
// 当 Http 响应码'500'
                else if (statusCode == 500) {
                    Toast.makeText(getApplicationContext(),
                            "Something went wrong at server end", Toast.LENGTH_LONG).show();
                }
// 当 Http 响应码 404, 500
                else {
                    Toast.makeText(
                            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();
        }
    }
}