ANDROID ：从解析中检索图像到 android activity

Question

我创建了一个 ListView。当我单击 ListView 的单个项目时，我调用 activity 来显示单个项目视图。正在解析 TextView 数据。但是当我试图从解析中调用图像时它没有加载（图像托管在一个单独的在线位置）。如果有人能告诉我如何在这里加载图像??

my file url

url = new URL("file location " + statusObject.getString("image"));

edited code

   URL url = null;
                    try {
                        url = new URL("https://www.gravatar.com/avatar/db5bfe41c9d21d3a5b4e5b5f6a2d776d?s=32&d=identicon&r=PG&f=1");
                    } catch (MalformedURLException e1) {
                        e1.printStackTrace();
                    }
                    Bitmap bmp = null;
                    try {
                        bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
                    } catch (IOException e1) {
                        e1.printStackTrace();
                    }
                    txtv2.setImageBitmap(bmp);

////////////////

单项视图

import android.content.*;
import android.net.*;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.*;
import android.view.View;
import android.widget.*;

import com.parse.*;
import com.parse.ParseException;

public class SingleItemView extends AppCompatActivity {

    String objectId;
    protected TextView txtv;
    protected TextView txtv1;
    protected ImageView txtv2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_single_item_view);


        txtv =(TextView)findViewById(R.id.txt123);
        txtv1 =(TextView)findViewById(R.id.txt1234);
        txtv2 =(ImageView)findViewById(R.id.txt12345);
        Intent i =getIntent();

        objectId = i.getStringExtra("objectId");

        ParseQuery<ParseObject> query = ParseQuery.getQuery("_User");
        query.getInBackground(objectId, new GetCallback<ParseObject>() {
            public void done(ParseObject object, ParseException e) {
                if (e == null) {

                    String username = object.getString("firstname");
                    txtv.setText(username);
                    String position = object.getString("position");
                    txtv1.setText(position);
                    String img_ = object.getString("image");
                    txtv2.setImageURI(Uri.parse(img_));

                } else {
                    // something went wrong
                }
            }
        });



    }

}

片段文件

import android.content.*;
import android.os.Bundle;
import android.support.v4.app.*;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.*;

import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;
import java.util.ArrayList;
import java.util.List;

public class Individuals extends android.support.v4.app.ListFragment
        implements FindCallback<ParseObject> {

    private List<ParseObject> mOrganization = new ArrayList<ParseObject>();
    SearchView sv;
    IndividualsAdaptor adaptor;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.individuals, container, false);
    }
    @Override
    public void onViewCreated(View view, Bundle b) {
        super.onViewCreated(view, b);
        sv = (SearchView) view.findViewById(R.id.ser1);
        adaptor = new IndividualsAdaptor(getActivity(), mOrganization);
        setListAdapter(adaptor);
        ParseQuery.getQuery("_User").findInBackground(this);

        sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String text) {
                return false;
            }
            @Override
            public boolean onQueryTextChange(String text) {
                adaptor.getFilter().filter(text);
                return true;
            }
        });
    }
    @Override
    public void done(List<ParseObject> scoreList, ParseException e) {
        if (e == null) {
            Log.d("score", "Retrieved " + scoreList.size() + " _User");
            mOrganization.clear();
            mOrganization.addAll(scoreList);
            ((IndividualsAdaptor) getListAdapter()).updateBackupList(mOrganization);
            ((IndividualsAdaptor) getListAdapter()).notifyDataSetChanged();
        } else {
            Log.d("score", "Error: " + e.getMessage());
        }
    }

   @Override
    public void onListItemClick(android.widget.ListView l, android.view.View v, int position, long id) {
        super.onListItemClick(l, v, position, id);

        ParseObject prs = mOrganization.get(position);
        String objectId = prs.getObjectId();
        Intent i = new Intent(getActivity(), SingleItemView.class);
        i.putExtra("objectId", objectId);
        startActivity(i);

    }
}

Answer 1

在 Manifest.xml 中定义 <uses-permission android:name="android.permission.INTERNET" />。

然后使用 Picasso 或 Gilde 并从它们各自的实例中解析图像，并传递您正在从解析中查询的 image URL。这些库将解析 ImageView 中的 URL 和 return 图像。

其他类似问题： Load image from url

How to load an ImageView by URL in Android?

Answer 2

finally this code is working after editing some codes form the link in the answer . by this code you can call images dynamically for each of the Object id.

 URL url = null;
                        try {
                            url = new URL("image url" + object.getString("image"));
                        } catch (MalformedURLException e1) {
                            e1.printStackTrace();
                        }
                        Bitmap bmp = null;
                        try {
                            bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
                        } catch (IOException e1) {
                            e1.printStackTrace();
                        }
                        txtv2.setImageBitmap(bmp);

                        // something went wrong

ANDROID ：从解析中检索图像到 android activity

ANDROID :Retrieving image from parse to an android activity

java

android

listview

android-fragments

parse-server