Android 从internet下载.txt文件

可能重复：

我如何从互联网上以给定的URL下载一个.txt文件并将其保存到Android手机上？它可以保存到内部存储器、SD存储器或任何可供应用程序使用的真正可访问的位置

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我用来测试加载URL Web视图的URL是

，这应该可以做到。它将文件下载到

sdcard/Download/products.txt

。你可以在下面更改它

try {
    URL url = new URL("http://base.google.com/base/products.txt");
    URLConnection conexion = url.openConnection();
    conexion.connect();
    int lenghtOfFile = conexion.getContentLength();
    InputStream is = url.openStream();
    File testDirectory = new File(Environment.getExternalStorageDirectory() + "/Download");
    if (!testDirectory.exists()) {
        testDirectory.mkdir();
    }
    FileOutputStream fos = new FileOutputStream(testDirectory + "/products.txt");
    byte data[] = new byte[1024];
    long total = 0;
    int count = 0;
    while ((count = is.read(data)) != -1) {
        total += count;
        int progress_temp = (int) total * 100 / lenghtOfFile;
        /*publishProgress("" + progress_temp); //only for asynctask
        if (progress_temp % 10 == 0 && progress != progress_temp) {
            progress = progress_temp;
        }*/
        fos.write(data, 0, count);
    }
    is.close();
    fos.close();
} catch (Exception e) {
    Log.e("ERROR DOWNLOADING", "Unable to download" + e.getMessage());
}

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这应该能奏效。它将文件下载到

sdcard/Download/products.txt

。你可以在下面更改它

try {
    URL url = new URL("http://base.google.com/base/products.txt");
    URLConnection conexion = url.openConnection();
    conexion.connect();
    int lenghtOfFile = conexion.getContentLength();
    InputStream is = url.openStream();
    File testDirectory = new File(Environment.getExternalStorageDirectory() + "/Download");
    if (!testDirectory.exists()) {
        testDirectory.mkdir();
    }
    FileOutputStream fos = new FileOutputStream(testDirectory + "/products.txt");
    byte data[] = new byte[1024];
    long total = 0;
    int count = 0;
    while ((count = is.read(data)) != -1) {
        total += count;
        int progress_temp = (int) total * 100 / lenghtOfFile;
        /*publishProgress("" + progress_temp); //only for asynctask
        if (progress_temp % 10 == 0 && progress != progress_temp) {
            progress = progress_temp;
        }*/
        fos.write(data, 0, count);
    }
    is.close();
    fos.close();
} catch (Exception e) {
    Log.e("ERROR DOWNLOADING", "Unable to download" + e.getMessage());
}

---

初始化变量

progress

后，引用了未知变量

count

。我可以假定

count

应该是

progress

？对不起！添加

int计数可访问的位置。编辑我的答案！初始化变量
progress
后，引用了未知变量
count
。我可以假定
count
应该是
progress
？对不起！添加
int计数可访问的位置。编辑我的答案！