android - 从网络服务器保存图像并将其设置为壁纸

问题描述

谁能提供一些关于如何从网络服务器保存图像并将其设置为墙纸的想法/指导?我正在开发一个需要这样做的 android 应用程序，我是 android 的新手.非常感谢.

Can anyone please provide me some idea/guidance on how to save an image from a webserver and set it as wallpaper? i am developing an android application which needs to do that and i am new in android. Thanks a lot.

我曾尝试编写自己的代码，但它不起作用，因为我在下载后找不到我的图片，但壁纸已更改为下载的图片.这是我现有的代码.

I had tried writing my own code but it doesn't work as i can't find my images after download but the wallpaper has change to the downloaded picture. here is my existing code.

Bitmap bmImg;

void downloadFile(String fileUrl) {
    URL myFileUrl = null;
    try {
        myFileUrl = new URL(fileUrl);
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    try {
        HttpURLConnection conn = (HttpURLConnection) myFileUrl
                .openConnection();
        conn.setDoInput(true);
        conn.connect();
        int length = conn.getContentLength();

        InputStream is = conn.getInputStream();

        bmImg = BitmapFactory.decodeStream(is);
        // this.imView.setImageBitmap(bmImg);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    try {
        String filepath=Environment.getExternalStorageDirectory().getAbsolutePath(); 
        FileOutputStream fos = new FileOutputStream(filepath + "/" + "output.jpg"); 
        bmImg.compress(CompressFormat.JPEG, 75, fos);
        fos.flush();
        fos.close();

        Context context = this.getBaseContext();
        context.setWallpaper(bmImg);
    } catch (Exception e) {
        //Log.e("MyLog", e.toString());
        TextView tv = (TextView) findViewById(R.id.txt_name);
        tv.setText(e.toString());
    }

}

推荐答案

我曾尝试编写自己的代码，但它不起作用，因为我找不到我的图像下载后.这是我现有的代码.

I had tried writing my own code but it doesn't work as i can't find my images after download. here is my existing code.

您的代码会将图像保存在手机的 data/data/<your_app_package_name> 文件夹中.然后，您可以使用 WallpaperManager 实例 或执行 context.setWallpaper(bitmap)(已弃用)将您的位图设置为墙纸.

Your code would save the image in the data/data/<your_app_package_name> folder of the phone. You can then use either a WallpaperManager instance or do a context.setWallpaper(bitmap)(this is deprecated) to set your bitmap as the wallpaper.

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