我想将imageView id“userProfilePic”中的图片更改为用户选择的新图片，并将该图片更新到数据库。但是一旦我选择了一张新图片，“userProfilePic”id下的图片会快速更改为新图片并再次更改为旧图片（已经在数据库中），因此我无法为“userProfilePic”上传新图片ID。我是Android开发的初学者，我只知道少量的android，所以请帮我解决这个问题。这是我的EditUserProfile.java file
package com.example.kasun.timetable;
import android.app.DatePickerDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.ActionBarActivity;
import android.util.Base64;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Locale;
public class EditYourProfile extends ActionBarActivity implements View.OnClickListener {
private static final int Result_Load_Image=1;
private Button bSave2,bBack2,bImageUpload;
private EditText etUsernameEdit,etFirstNameEdit,etLastNameEdit,etPasswordEdit,etPositionEdit,etBirthDateEdit,etQualificationEdit,etEmailEdit;
private Calendar myCalendar = Calendar.getInstance();
private UserLocalDatabase userLocalDatabase;
private ImageView userProfilePic;
private static final String SERVER_ADDRESS="http://172.21.18.170/Timetable/";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_your_profile);
bBack2=(Button)findViewById(R.id.bBack2);
bSave2=(Button)findViewById(R.id.bSave2);
etUsernameEdit=(EditText)findViewById(R.id.etUserNameEdit);
etFirstNameEdit=(EditText)findViewById(R.id.etFirstNameEdit);
etLastNameEdit=(EditText)findViewById(R.id.etLastNameEdit);
etPasswordEdit=(EditText)findViewById(R.id.etPasswordEdit);
etEmailEdit=(EditText)findViewById(R.id.etEmailEdit);
etQualificationEdit=(EditText)findViewById(R.id.etQualificationEdit);
etPositionEdit=(EditText)findViewById(R.id.etPositionEdit);
etBirthDateEdit=(EditText)findViewById(R.id.etBirthDateEdit);
userProfilePic=(ImageView)findViewById(R.id.userProfilePic);
bImageUpload=(Button)findViewById(R.id.bImageUpload);
bSave2.setOnClickListener(this);
bBack2.setOnClickListener(this);
userProfilePic.setOnClickListener(this);
bImageUpload.setOnClickListener(this);
userLocalDatabase = new UserLocalDatabase(this);
final DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
myCalendar.set(Calendar.YEAR, year);
myCalendar.set(Calendar.MONTH, monthOfYear);
myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
updateLabel();
}
};
etBirthDateEdit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new DatePickerDialog(EditYourProfile.this, date, myCalendar
.get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),
myCalendar.get(Calendar.DAY_OF_MONTH)).show();
}
});
}
private void updateLabel() {
String myFormat = "MM/dd/yy";
SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.US);
etBirthDateEdit.setText(sdf.format(myCalendar.getTime()));
}
@Override
protected void onStart() {
super.onStart();
if(authenticate()==true){
showDetails();
}
else {
startActivity(new Intent(this, MainActivity.class));
finish();
}
}
public boolean authenticate(){
return userLocalDatabase.getUserStatus();
}
public void showDetails(){
User user=userLocalDatabase.getLoggedInUser();
etFirstNameEdit.setText(user.firstName);
etLastNameEdit.setText(user.lastName);
etUsernameEdit.setText(user.userName);
etQualificationEdit.setText(user.qualification);
etPositionEdit.setText(user.position);
etPasswordEdit.setText(user.password);
etEmailEdit.setText(user.email);
new downloadImage(etUsernameEdit.getText().toString()).execute();
}
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.bSave2:
break;
case R.id.bBack2:
startActivity(new Intent(this,SelectTask.class));
break;
case R.id.userProfilePic:
Intent galleryIntent= new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent,Result_Load_Image);
break;
case R.id.bImageUpload:
Bitmap image=((BitmapDrawable) userProfilePic.getDrawable()).getBitmap();
new uploadImage(image,etUsernameEdit.getText().toString()).execute();
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==Result_Load_Image && resultCode==RESULT_OK && data!=null){
Uri selectedImage= data.getData();
userProfilePic.setImageURI(selectedImage);
}
}
public class uploadImage extends AsyncTask<Void,Void,Void> {
private Bitmap image;
private String name;
public uploadImage(Bitmap image,String name){
this.image=image;
this.name=name;
}
@Override
protected Void doInBackground(Void... params) {
ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG,100,byteArrayOutputStream);
String encodedImage= Base64.encodeToString(byteArrayOutputStream.toByteArray(),Base64.DEFAULT);
ArrayList<NameValuePair> dataToSend1= new ArrayList<>();
dataToSend1.add(new BasicNameValuePair("image",encodedImage));
dataToSend1.add(new BasicNameValuePair("name",name));
HttpParams httpRequestParams= getHttpRequestParams();
HttpClient httpClient = new DefaultHttpClient(httpRequestParams);
HttpPost post= new HttpPost(SERVER_ADDRESS + "savePicture.php");
try{
post.setEntity(new UrlEncodedFormEntity(dataToSend1));
httpClient.execute(post);
}
catch(Exception e){
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
Toast.makeText(getApplicationContext(),"Image is uploaded",Toast.LENGTH_SHORT).show();
}
}
//----------------------------------------------------------------------------------------------
private HttpParams getHttpRequestParams(){
HttpParams httpRequestParams= new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpRequestParams, 1000 * 30);
HttpConnectionParams.setSoTimeout(httpRequestParams,1000 * 30);
return httpRequestParams;
}
public class downloadImage extends AsyncTask<Void,Void,Bitmap>{
private String name;
public downloadImage(String name){
this.name=name;
}
@Override
protected Bitmap doInBackground(Void... params) {
String url= SERVER_ADDRESS+"proPictures/"+name+".JPG";
try{
URLConnection connection= new URL(url).openConnection();
connection.setConnectTimeout(1000*30);
connection.setReadTimeout(1000 * 30);
return BitmapFactory.decodeStream((InputStream) connection.getContent(), null, null);
}catch(Exception e){
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
if(bitmap!=null){
userProfilePic.setImageBitmap(bitmap);
}
}
}
}
这是我的相关xml文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.example.kasun.timetable.EditYourProfile"
android:background="#303030">
<ScrollView
android:layout_width="match_parent"
android:layout_height="1000dp"
android:id="@+id/scroll">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:layout_width="110dp"
android:layout_height="100dp"
android:id="@+id/userProfilePic"
android:layout_marginTop="34dp"
android:background="#c6c4c4"
android:layout_marginBottom="10dp"/>
<Button
android:layout_width="110dp"
android:layout_height="wrap_content"
android:text="Upload "
android:id="@+id/bImageUpload"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/userNameText"
android:id="@+id/textView18"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="@+id/etUserNameEdit"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/FirstNameText"
android:id="@+id/textView19"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="@+id/etFirstNameEdit"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/LastNameText"
android:id="@+id/textView20"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="@+id/etLastNameEdit"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/Password"
android:id="@+id/textView21"
android:layout_marginTop="16dp"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="@+id/etPasswordEdit"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/Position"
android:id="@+id/textView23"
android:layout_marginTop="12dp"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="@+id/etPositionEdit"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/Email"
android:id="@+id/textView24"
android:layout_marginTop="12dp"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="@+id/etEmailEdit"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/Telephone"
android:id="@+id/textView25"
android:layout_marginTop="12dp"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="@+id/etTelephoneEdit"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/BDate"
android:id="@+id/textView26"
android:layout_marginTop="16dp"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/etBirthDateEdit"
android:textColor="#ffffffff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/qualification"
android:id="@+id/textView26"
android:layout_marginTop="16dp"
android:layout_marginBottom="10dp"
android:textColor="#ffffffff" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/etQualificationEdit"/>
<!--<DatePicker-->
<!--android:layout_width="wrap_content"-->
<!--android:layout_height="wrap_content"-->
<!--android:id="@+id/datePicker"-->
<!--android:layout_alignBottom="@+id/scroll"-->
<!--android:layout_centerHorizontal="true"-->
<!--android:layout_marginBottom="85dp" />-->
</LinearLayout>
</ScrollView>
<Button
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="@string/LogoutButtonText"
android:id="@+id/bLogout2"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:gravity="center" />
<!--android:layout_alignParentRight="@+id/bBack2"-->
<!--android:layout_alignBottom="@+id/scroll"-->
<Button
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="@string/BackButtonText"
android:id="@+id/bBack2"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:gravity="center" />
<Button
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="@string/SaveButtonText"
android:id="@+id/bSave2"
android:layout_alignTop="@+id/bBack2"
android:layout_centerHorizontal="true"
android:gravity="center" />
</RelativeLayout>
答案 0 :(得分：0)
我认为这可能来自于你在onstart方法上调用showDetail这个事实，当你回到你的活动时会调用它。也许它做的是这样的： activityToPickUpAPic - ＆gt; PickUpAPic - ＆gt;返回该活动 - ＆gt; Onstart - ＆gt;可以开始下载您的图片 - ＆gt;开始活动结果 - ＆gt;为您的新图像充电 - >完成从服务器下载图像
当您再次调用onStart时，再次调用onStart，因此您可能希望更改此方法并仅使用Oncreate方法调用下载图片。
让我知道这是问题;）
编辑：
boolean isImageSet = false;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==Result_Load_Image && resultCode==RESULT_OK && data!=null){
Uri selectedImage= data.getData();
userProfilePic.setImageURI(selectedImage);
isImageSet = true;
}
}
和
if(bitmap!=null && !isImageSet){
userProfilePic.setImageBitmap(bitmap);
}
对于测试，你可以发表评论
//userProfilePic.setImageBitmap(bitmap);