安卓获取图片示例

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/im1"
        android:layout_width="wrap_content"
        android:layout_height="269dp"
        tools:srcCompat="@tools:sample/backgrounds/scenic" />

</LinearLayout>

package com.example.getnet;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {
    ImageView imageView;
    Handler handler;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = (ImageView) findViewById(R.id.im1);
        handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                Bitmap bitmap = (Bitmap) msg.obj;
                imageView.setImageBitmap(bitmap);
            }
        };

        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    URL url = new URL("https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1370223763,565395419&fm=15&gp=0.jpg");
                    HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                    httpURLConnection.setRequestMethod("GET");
                    httpURLConnection.setReadTimeout(5000);
                    httpURLConnection.setConnectTimeout(5000);
                    InputStream inputStream = httpURLConnection.getInputStream();
                    //bitmap取出对象
                    Bitmap bm = BitmapFactory.decodeStream(inputStream);
                    //传入Message
                    Message message = Message.obtain();
                    message.obj = bm;
                    handler.sendMessage(message);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }
}