java - 更改进度对话框的进度单位(字节到兆字节)

Question

我有一个进度对话框，显示使用字节作为进度单位下载我的文件 我想将进度单位转换为兆字节

public void initializeDialog()
    {
        this.pDialog = new ProgressDialog(act);
        this.pDialog.setMessage("Download");
        this.pDialog.setIndeterminate(false);
        this.pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        this.pDialog.setCancelable(true);
    }

    public AsynchTest() {
        initializeDialog();
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();

pDialog.setProgressNumberFormat("%1d MB / %2d MB");
        pDialog.show();
        pDialog.setProgress(0);

    }

    @Override
    protected Void doInBackground(Void... params) {

        downloadContent();
        return null;
    }

    @Override
    protected void onProgressUpdate(Integer... progress) {


        pDialog.incrementProgressBy((int) byteToMB(progress[0]));
    }

    @Override
    protected void onPostExecute(Void result) {
        pDialog.dismiss();

    }

我使用此函数将字节转换为 mb

public long byteToMB(long byteTransform)
    {
        long mb=1024L*1024L;
        return byteTransform/mb;

    }

我用来更新进度对话框的代码 fragment

byte data[] = new byte[1024];
            while ((count = input.read(data)) != -1) {  
                asynch.publishProgress(count);
                output.write(data, 0, count);


            }

我像这样设置进度对话框的最大值

sizePDialog+=ConnectionManager.getLength(url);
pDialog.setMax((int) byteToMB(sizePDialog));

但是当我这样做时我遇到了这个错误

04-07 20:09:55.119: E/AndroidRuntime(20166): java.lang.NumberFormatException: Invalid long: "%1d"

非常感谢

Answer 1

我认为你不应该像文档所说的那样在 onProgressUpdate 中调用 setProgressNumberFormat http://developer.android.com/reference/android/app/ProgressDialog.html#setProgressNumberFormat(java.lang.String)

Change the format of the small text showing current and maximum units of progress. The default is "%1d/%2d". Should not be called during the number is progressing.

事实上，setProgressNumberFormat 仅更改进度和最大进度的显示方式，您无法更改(就像您尝试过的那样)格式化之前的值。 我建议您在将值传输到进度对话框时将字节转换为MB，然后值将被格式化为MB。

这样做，您应该将 pDialog.incrementProgressBy(progress[0]); 替换为 pDialog.incrementProgressBy(byteToMB(progress[0])); 并调用

pDialog.setProgressNumberFormat("%1d MB / %2d MB");

在onPreExecute