Android写入文件 - 找不到文件

Question

我是Android开发的新手.我尝试写一些文件.我正在使用代码:

try {
                    FileOutputStream fOut = openFileOutput(
                            "out.txt", MODE_WORLD_READABLE);

                    OutputStreamWriter osw = new OutputStreamWriter(fOut);
                    osw.write("something");
                    osw.flush();
                    osw.close();
                    fOut.close();

                } catch (MalformedURLException e) {
                    Log.e("FILE WRITE ERROR", e.getMessage());
                } catch (IOException e) {
                    Log.e("FILE WRITE ERROR", e.getMessage());
                }

一切都没问题,但我在DDMS FIle Explorer中找不到该文件.你能帮助我并告诉我Android保存文件的位置吗？它不在"/ data/data/my_project_package"中.谢谢.

Answer 1

1)一定要在你的清单中有这个:

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

2)无论是使用仿真器还是使用设备进行测试都会产生影响.如果是后者,请务必从PC上卸下设备(选择:"仅充电").调试仍然会以这种方式工作.只是你不能同时写作和观看.

此方法有效:

public void writeToExternalStoragePublic(String filename, int content) {
    String packageName = this.getPackageName();
    String path = Environment.getExternalStorageDirectory().getAbsolutePath()+ "/Android/data/" + packageName + "/files/";
    if (isExternalStorageAvailable() && !isExternalStorageReadOnly()) {
        try {
            boolean exists = (new File(path)).exists();
            if (!exists) {
                new File(path).mkdirs();
            }
            // Open output stream
            FileOutputStream fOut = new FileOutputStream(path + filename,true);
            // write integers as separated ascii's
            fOut.write((Integer.valueOf(content).toString() + " ").getBytes());
            fOut.write((Integer.valueOf(content).toString() + " ").getBytes());
            // Close output stream
            fOut.flush();
            fOut.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}