Android HttpURLConnection下载网络图片设置系统壁纸

package xxxxx.utils;
 
import android.app.Activity;
import android.app.WallpaperManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
 
/**
 * 设置壁纸
 * 1、下载网络图片，使用HttpURLConnection
 * 2、设置壁纸
 * Created by zst on 2018/10/15.
 */
 
public class HttpURLConnectionUtil {
 
  /**
   * 设置系统壁纸
   * 1、把网络图片设置系统壁纸
   * 2、因为谷歌不维护其他框架了，所以使用HttpURLConnection来下载和配置
   *
   * @param activity
   * @param imgUrl
   */
  public static void setWallpaper(final Activity activity, final String imgUrl) {
    //Log.e("壁纸", "链接：" + imgUrl);
 
    new Thread(new Runnable() {
      @Override
      public void run() {
        try {
          URL httpUrl = new URL(imgUrl);//获取传入进来的url地址 并捕获解析过程产生的异常
          //使用是Http访问 所以用HttpURLConnection 同理如果使用的是https 则用HttpsURLConnection
          try {
            HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection();//通过httpUrl开启一个HttpURLConnection对象
            conn.setReadTimeout(5000);//设置显示超市时间为5秒
            conn.setRequestMethod("GET");//设置访问方式
            conn.setDoInput(true);//设置可以获取输入流
 
            InputStream in = conn.getInputStream();//获取输入流
 
            //创建一个写入ID卡的文件对象
            FileOutputStream out = null;
            File download = null;
            String filename = String.valueOf(System.currentTimeMillis());//获取系统时间
            //判断文件是否存在  Environment.MEDIA_MOUNTEDID卡是否挂载 如果是则创建文件对象
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
              File parent = Environment.getExternalStorageDirectory();//获取ID卡目录
              download = new File(parent, filename);//在父类的目录下创建一个以当前下载的系统时间为文件名的文件
 
              out = new FileOutputStream(download);
            }
 
            byte[] b = new byte[2 * 1024];
            int len;
            if (out != null) {//id卡如果存在 则写入
              while ((len = in.read(b)) != -1) {
                out.write(b, 0, len);
              }
            }
 
            //读取该文件中的内容
            final Bitmap bitmap = BitmapFactory.decodeFile(download.getAbsolutePath());
            activity.runOnUiThread(new Runnable() {
              @Override
              public void run() {
                //设置图片为壁纸
                //Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(),R.drawable.bg_user_top);//设置项目res中的图片
                WallpaperManager manager = WallpaperManager.getInstance(activity);
                try {
                  manager.setBitmap(bitmap);
                  UiUtil.showToastLong(activity, "壁纸设置成功，请在桌面上查看");
                } catch (IOException e) {
                  UiUtil.showToast(activity, "壁纸设置成失败");
                  e.printStackTrace();
                }
              }
            });
 
          } catch (IOException e) {
            e.printStackTrace();
          }
 
        } catch (MalformedURLException e) {
          e.printStackTrace();
        }
 
      }
    }).start();
  }
 
}