Question

经过很多尝试，终于让我的异步任务工作了，并根据进度更新了ui。这里的主要目标是将来自api调用的一些数据添加到我的数据库中。我的百分比计算无法正常工作，因为在进度栏中，我将max设置为100，因此我需要使百分比正常运行。

class AddtoDBTask extends AsyncTask<List<RecordModel>, Integer, String> {
        @Override
        protected String doInBackground(List<RecordModel>... lists) {
            List<RecordModel> records = lists[0];
            for (int count = 0; count < records.size(); count ++) {
                publishProgress(count);
                RecordModel record = new RecordModel();
                record.recordid = records.get(count).recordid;
                record.name = records.get(count).name;
                record.idnumber = records.get(count).idnumber;
                record.gender = records.get(count).gender;
                record.dobirth= records.get(count).dobirth;
                SQLiteHelper.addRecord(record);
                Log.d("Log: ", record.title + " added");
            }
            return "Task Completed.";
        }
        @Override
        protected void onPostExecute(String result) {
            syncProgress.setVisibility(View.GONE);
            statusText.setText(String.format("Thanks for your patience, We are done syncing!"));
        }
        @Override
        protected void onPreExecute() {
            statusText.setText(String.format("Task 2 of 2 in progress..."));
        }
        @Override
        protected void onProgressUpdate(Integer... values) {
            int currentRecord = (values[0] + 1);
            int progress = (currentRecord / recordcount) * 100;
            syncPercentage.setText(progress + " %"); //not working
            syncSize.setText(String.format("Record " + currentRecord + " of " + recordcount));
            syncProgress.setProgress(progress); //not working
        }
    }

此代码的其余部分（除百分比部分外）有效。

Answer 1

在您的代码中，我看不到recordcount的声明位置以及为其分配了什么值。如果它是整数，那么由于整数除法，我想currentRecord / recordcount将始终为0。
更改：

publishProgress(count);

到

publishProgress(count, records.size());

因此您可以像这样计算正确的百分比：

int progress = (int)((1.0 * currentRecord / values[1]) * 100);

Answer 2

我相信您未接打super.onProgressUpdate(values);的电话看起来应该像这样

@Override
    protected void onProgressUpdate(Integer... values) {
        super.onProgressUpdate(values);

        int currentRecord = (values[0] + 1);
        int progress = (currentRecord / recordcount) * 100;
        syncPercentage.setText(progress + " %"); //not working
        syncSize.setText(String.format("Record " + currentRecord + " of " + recordcount));
        syncProgress.setProgress(progress); //not working
    }

一些计算，例如我的异步任务中的百分比不起作用

2 个答案: