Question

private void readFileFromSDCard() {
        File directory = Environment.getExternalStorageDirectory();

        File file = new File(directory+"/HomeActivityLogs");
        //file.getParentFile().mkdirs();

        if (!file.exists()) {

            FileWriter gpxwriter;
            try {
                System.out.println(" IN TRY Error");
                file.createNewFile();
                gpxwriter = new FileWriter(file);

                System.out.println(" file writer Error");
            BufferedWriter out = new BufferedWriter(gpxwriter);
            out.write("http://192.168.1.126/msfaws2_4/Service.asmx");
            System.out.println(" in url Error");
        ///    out.write("http://192.168.1.250/msfaws2_4/Service.asmx");
            out.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                loginLog.appendLog("Exception in readFileFromSDCard() " + e.getMessage(),"MainActivity");
            }
        }

        BufferedReader reader = null;
        try {
            System.out.println("Error");
            reader = new BufferedReader(new FileReader(file));
            StringBuilder builder = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                builder.append(line);
            }
            Constant.URL = builder.toString();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                    loginLog.appendLog("Exception in readFileFromSDCard() " + e.getMessage(),"MainActivity");
                }
            }
        }
}

请帮我解决这个问题。它给出了一个文件名错误的文件当数据临时存储然后从活动中检索时，它会从Web服务动态创建。

Answer 1

试试这个，在manifest.xml

中添加此权限

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

在运行时生成了FIleNotFoundException错误

1 个答案: