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();  } }