标签：Toast 上传 void private import android null 数据
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();
}
}
}
标签：Toast,上传,void,private,import,android,null,数据 来源： https://www.cnblogs.com/jidezan/p/16375720.html
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。