Android 从JSON加载毕加索中的图像
我想从MySQL数据库中存储的url加载毕加索中的图像。Android 从JSON加载毕加索中的图像,android,json,string,crud,picasso,Android,Json,String,Crud,Picasso,我想从MySQL数据库中存储的url加载毕加索中的图像。 但是返回的代码是JSON,我无法让它工作 当放置直接链接而不是TAG_图像时,它显示的图像没有任何问题(因此毕加索自己正在处理字符串) 如何将JSON解析为字符串,以便毕加索可以加载它 编辑 TAG_图像需要转换为字符串(由Punit回答) 代码: import ... public class ViewRecipeActivity extends Activity { TextView txtName; TextView txtTi
但是返回的代码是JSON,我无法让它工作 当放置直接链接而不是TAG_图像时,它显示的图像没有任何问题(因此毕加索自己正在处理字符串) 如何将JSON解析为字符串,以便毕加索可以加载它 编辑 TAG_图像需要转换为字符串(由Punit回答) 代码:
import ...
public class ViewRecipeActivity extends Activity {
TextView txtName;
TextView txtTime;
TextView txtPrice;
TextView txtDesc;
ImageView imagePhoto;
TextView txtCreatedAt;
String pid;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
// single product url
private static final String url_recipe_details = "phpfiletoloadall.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_RECIPE = "recipes";
private static final String TAG_PID = "pid";
private static final String TAG_NAME = "name";
private static final String TAG_TIME = "time";
private static final String TAG_PRICE = "price";
private static final String TAG_IMAGE = "image";
private static final String TAG_DESCRIPTION = "description";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_recipe);
//toolbar back button
ImageView btnBack = findViewById( R.id.btnBack );
btnBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick (View view) {
startActivity(new Intent(ViewRecipeActivity.this, ActivityTwo.class));
finish();
}
}
);
BottomNavigationView bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottomNavView_Bar);
BottomNavigationViewHelper.disableShiftMode(bottomNavigationView);
Menu menu = bottomNavigationView.getMenu();
MenuItem menuItem = menu.getItem(2);
menuItem.setChecked(true);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.ic_home:
Intent intent0 = new Intent(ViewRecipeActivity.this, MainActivity.class);
startActivity(intent0);
finish();
break;
case R.id.ic_ingredients:
Intent intent1 = new Intent(ViewRecipeActivity.this, ActivityOne.class);
startActivity(intent1);
finish();
break;
case R.id.ic_dining:
break;
case R.id.ic_center_focus:
Intent intent3 = new Intent(ViewRecipeActivity.this, ActivityThree.class);
startActivity(intent3);
finish();
break;
case R.id.ic_backup:
Intent intent4 = new Intent(ViewRecipeActivity.this, ActivityFour.class);
startActivity(intent4);
finish();
break;
}
return false;
}
});
//Make network connect access (temp)
StrictMode.ThreadPolicy policy = new
StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
// Make textview scrollable
TextView textView = (TextView) findViewById(R.id.inputDesc);
textView.setMovementMethod(new ScrollingMovementMethod());
// getting product details from intent
Intent i = getIntent();
// getting product id (pid) from intent
pid = i.getStringExtra(TAG_PID);
// Getting complete product details in background thread
new GetProductDetails().execute();
}
/**
* Background Async Task to Get complete product details
* */
class GetProductDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ViewRecipeActivity.this);
pDialog.setMessage("Loading recipe details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... params) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("pid", pid));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_recipe_details, "GET", params);
// check your log for json response
Log.d("Single Recipe Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_RECIPE); // JSON Array
// get first product object from JSON Array
JSONObject product = productObj.getJSONObject(0);
// product with this pid found
// Edit Text
txtName = (TextView) findViewById(R.id.inputName);
txtDesc = (TextView) findViewById(R.id.inputDesc);
imagePhoto = (ImageView) findViewById( R.id.imagePhoto );
// display product data in EditText
txtName.setText(product.getString(TAG_NAME));
txtDesc.setText(product.getString(TAG_DESCRIPTION));
Picasso.get().load(TAG_IMAGE).into(imagePhoto);
Log.d("good", "shows recipe");
}else{
// product with pid not found
Log.d("bad", "recipe not found");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once got all details
pDialog.dismiss();
}
}
}
导入。。。
公共类ViewRecipeActivity扩展了活动{
TextView-txtName;
TextView txtTime;
TextView txtPrice;
TextView-txtDesc;
图像视图图像照片;
TextView txtCreatedAt;
串pid;
//进度对话框
私人对话;
//JSON解析器类
JSONParser JSONParser=新的JSONParser();
//单一产品url
私有静态最终字符串url\u recipe\u details=“phpfiletoloadall.php”;
//JSON节点名称
私有静态最终字符串标记_SUCCESS=“SUCCESS”;
私有静态最终字符串标记_RECIPE=“recipes”;
私有静态最终字符串标记_PID=“PID”;
私有静态最终字符串标记_NAME=“NAME”;
私有静态最终字符串标记\u TIME=“TIME”;
私有静态最终字符串标记_PRICE=“PRICE”;
私有静态最终字符串TAG_IMAGE=“IMAGE”;
私有静态最终字符串标记_DESCRIPTION=“DESCRIPTION”;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.view\u配方);
//工具栏后退按钮
ImageView btnBack=findViewById(R.id.btnBack);
btnBack.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
startActivity(新意图(ViewRecipeActivity.this、ActivityTwo.class));
完成();
}
}
);
BottomNavigationView BottomNavigationView=(BottomNavigationView)findViewById(R.id.BottomNavigationView_栏);
BottomNavigationViewHelper.disableShiftMode(bottomNavigationView);
Menu Menu=bottomNavigationView.getMenu();
MenuItem MenuItem=menu.getItem(2);
menuItem.setChecked(true);
bottomNavigationView.setOnNavigationItemSelectedListener(新的bottomNavigationView.OnNavigationItemSelectedListener(){
@凌驾
公共布尔值onNavigationItemSelected(@NonNull MenuItem item){
开关(item.getItemId()){
案例R.id.ic_主页:
Intent intent0=新的Intent(ViewRecipeActivity.this,MainActivity.class);
起始触觉(intent0);
完成();
打破
案例R.id.ic_成分:
Intent intent1=新的Intent(viewcrecipeActivity.this、ActivityOne.class);
星触觉(intent1);
完成();
打破
案例R.id.ic_餐厅:
打破
案例R.id.ic\U中心\U焦点:
Intent intent3=新的Intent(viewcrecipeActivity.this、ActivityThree.class);
起始触觉(intent3);
完成();
打破
案例R.id.ic\U备份:
意向意向4=新意向(ViewRecipeActivity.this、ActivityFour.class);
起始触觉(强度4);
完成();
打破
}
返回false;
}
});
//进行网络连接访问(临时)
StrictMode.ThreadPolicy策略=新建
StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(策略);
//使文本视图可滚动
TextView TextView=(TextView)findViewById(R.id.inputDesc);
setMovementMethod(新的ScrollingMovementMethod());
//从intent获取产品详细信息
Intent i=getIntent();
//从intent获取产品id(pid)
pid=i.getStringExtra(标签\ pid);
//在后台线程中获取完整的产品详细信息
新建GetProductDetails().execute();
}
/**
*获取完整产品详细信息的后台异步任务
* */
类GetProductDetails扩展了AsyncTask{
/**
*在启动后台线程显示进度对话框之前
* */
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
pDialog=新建进度对话框(viewcrecipeActivity.this);
setMessage(“正在加载配方详细信息。请稍候…”);
pDialog.setUndeterminate(假);
pDialog.setCancelable(真);
pDialog.show();
}
/**
*在后台线程中获取产品详细信息
* */
受保护的字符串doInBackground(字符串…参数){
//从后台线程更新UI
runOnUiThread(新的Runnable(){
公开募捐{
//检查成功标签
成功;
试一试{
//建筑参数
List params=new ArrayList();
参数添加(新的BasicNameValuePair(“pid”,pid));
//通过发出HTTP请求获取产品详细信息
//请注意,产品详细信息url将使用GET请求
JSONObject json=jsonParser.makeHttpRequest(
url_配方_详细信息,“获取”,参数);
//检查日志中的json响应
Log.d(“单一配方详细信息”,json.toString());
//json成功标记
success=json.getInt(TAG_success);
如果(成功==1){
//已成功接收产品详细信息
JSONArray productObj=json
.getJSONArray(TAG_RECIPE);//JSON数组
//从JSON数组中获取第一个产品对象
JSONObject product=productObj.getJSONObject(0);
//找到具有此pid的产品
String imageUrl = product.getString(TAG_IMAGE);
Picasso.get().load(imageUrl).into(imagePhoto);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_RECIPE); // JSON Array
// get first product object from JSON Array
JSONObject product = productObj.getJSONObject(0);
// product with this pid found
// Edit Text
txtName = (TextView) findViewById(R.id.inputName);
txtDesc = (TextView) findViewById(R.id.inputDesc);
imagePhoto = (ImageView) findViewById( R.id.imagePhoto );
// display product data in EditText
txtName.setText(product.getString(TAG_NAME));
txtDesc.setText(product.getString(TAG_DESCRIPTION));
Picasso.get().load(product.getString(TAG_IMAGE)).into(imagePhoto);
Log.d("good", "shows recipe");
}
Picasso.with(this)
.load(TAG_IMAGE)
.error(R.mipmap.no_image_available)
.into(imagePhoto);
Picasso.with(this)
.load(TAG_IMAGE)
.into(imagePhoto);