我正在尝试将对话选择器中的唤醒时间和 sleep 时间记录到这样的文本文件中，但是对方法 commitToFile2 的调用不会 append 文本文件“savedData.txt”。
我知道这段代码很脏。我是 Java 新手，因此我们将不胜感激任何其他建议。
package com.buttinyourface;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.AdapterView.OnItemClickListener;
public class SettingsActivity extends Activity {
public int wakeHour;
public int wakeMinute;
public int sleepHour;
public int sleepMinute;
public String sleepHourText = "No Data";
public String sleepMinuteText = "No Data";
public String outputTime = "No Data";
public String wakeHourText = "No Data";
private ListView lv;
Dialog newDialogBox;
Context appContext;
protected Context context;
static final private int WAKE_TIME = 0;
static final private int SLEEP_TIME = 1;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings);
final String[] settingsList = getResources().getStringArray(
R.array.settingsStringArray);
lv = (ListView) findViewById(R.id.list);
TextView wakeHourTextView = (TextView) findViewById(R.id.TextView01);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
int settingsPosition = position;
if (settingsPosition == 0) {
showDialog(WAKE_TIME);
wakeHourText = Integer.toString(wakeHour);
}
if (settingsPosition == 1) {
showDialog(SLEEP_TIME);
}
}
});
lv.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, settingsList));
wakeHourTextView.setText(outputTime);
}
public void onPrepareDialog(int id, Dialog dialog) {
switch (id) {
case WAKE_TIME:
break;
case SLEEP_TIME:
break;
}
}
@Override
public Dialog onCreateDialog(int id) {
switch (id) {
case WAKE_TIME:
return new TimePickerDialog(this, WakeTimeSetListener, wakeHour,
wakeMinute, false);
case SLEEP_TIME:
return new TimePickerDialog(this, SleepTimeSetListener, sleepHour,
sleepMinute, false);
}
return null;
}
private TimePickerDialog.OnTimeSetListener WakeTimeSetListener =
new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
wakeHour = hourOfDay;
wakeMinute = minute;
String wakeHourText = Integer.toString(hourOfDay);
String wakeMinuteText = Integer.toString(minute);
String preftime = hourOfDay + ":" + minute;
SimpleDateFormat df = new SimpleDateFormat("HH:mm");
SimpleDateFormat dfOut = new SimpleDateFormat("hh:mma");
Date date = null;
try {
date = df.parse(preftime);
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String outputWakeTime = dfOut.format(date);
try {
commitToFile(wakeHourText, wakeMinuteText, outputWakeTime);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
private TimePickerDialog.OnTimeSetListener SleepTimeSetListener =
new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
sleepHour = hourOfDay;
sleepMinute = minute;
String sleepHourText = Integer.toString(hourOfDay);
String sleepMinuteText = Integer.toString(minute);
String preftime = hourOfDay + ":" + minute;
SimpleDateFormat df = new SimpleDateFormat("HH:mm");
SimpleDateFormat dfOut = new SimpleDateFormat("hh:mma");
Date date = null;
try {
date = df.parse(preftime);
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String sleepOutputTime = dfOut.format(date);
try {
commitToFile2(sleepHourText, sleepMinuteText, sleepOutputTime);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
private void commitToFile(String wakeHourText, String wakeMinuteText,
String outputWakeTime) throws IOException {
final String entryString = new String("wakeHour=" + wakeHourText
+ ";wakeMinute=" + wakeMinuteText + ";wakeTime="
+ outputWakeTime + ";");
FileOutputStream fOut = openFileOutput("savedData.txt",
MODE_WORLD_READABLE);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.write(entryString);
osw.flush();
osw.close();
}
private void commitToFile2(String sleepHourText, String sleepMinuteText,
String sleepOutputTime) throws IOException {
final String entryString = new String("sleepHour=" + sleepHourText
+ ";sleepMinute=" + sleepMinuteText + ";sleepTime="
+ sleepOutputTime + ";");
FileOutputStream fOut = openFileOutput("savedData.txt",
MODE_WORLD_READABLE);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.write(entryString);
osw.flush();
osw.close();
}
}
最佳答案
我想通了....我不得不换行
FileOutputStream fOut = openFileOutput("savedData.txt", MODE_WORLD_READABLE);
到
FileOutputStream fOut = openFileOutput("savedData.txt", MODE_APPEND);
之后，我能够在不覆盖文本文件中已经存在的数据的情况下 append 文本文件。谢谢你们的帮助。我想有时去谷歌的第四页很有用。
关于Android append 文本文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/4542318/