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好吧，我讀了很多，並認爲我有這個工作，但顯然不是。我想要做的是檢查一個文件是否存在（在這種情況下heapFile.csv），如果它不創建它，然後寫一個字符串。如果文件確實存在，那麼我想將該字符串追加到文件中。當我運行這個時，我沒有得到任何錯誤，雖然我確實收到一個警告，說它不能創建文件，儘管它實際上是這樣做的。但是，無論在哪種情況下，都不會將字符串寫入文件。我可能只是沒有使用正確的語法或什麼東西，但在盯着這幾個星期，我看不到樹林和發現問題。除了這一個問題，我的程序工作正常，如果我能夠得到這個工作，我可以最終完成這個。任何幫助都令人難以置信的讚賞。如果文件不存在，創建它並將字符串寫入它。如果它確實附加了字符串。工作不正確
這是java文件。我認爲這很清楚文件創建/寫入位在哪裏。
package com.loch.meaptracker;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import com.google.ads.*;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TimePicker;
public class MainActivity extends Activity implements OnSeekBarChangeListener {
private SeekBar happyBar, energyBar, anxietyBar, painBar;
private EditText noteField;
private DatePicker dPick;
private TimePicker tPick;
@SuppressWarnings("unused")
private Button enterButton;
private int happyValue = 4, energyValue = 4, anxietyValue = 4,
painValue = 4;
private static final String TAG = "heapApp";
private String Mood = "Blah";
private AdView adView;
final Context context = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create the adView
adView = new AdView (this, AdSize.BANNER, "a15138b1a7adad2");
// Lookup your RelativeLayout assuming it's been given the attribute android:id="@+id/AdRelativeLayout
RelativeLayout layout = (RelativeLayout)findViewById(R.id.AdRelativeLayout);
// Add the AdView to it
layout.addView(adView);
// Initiate a generic request to load it with an ad
adView.loadAd(new AdRequest());
// bars
happyBar = (SeekBar) findViewById(R.id.happinessBarID);
happyBar.setOnSeekBarChangeListener(this);
energyBar = (SeekBar) findViewById(R.id.energyBarID);
energyBar.setOnSeekBarChangeListener(this);
anxietyBar = (SeekBar) findViewById(R.id.anxietyBarID);
anxietyBar.setOnSeekBarChangeListener(this);
painBar = (SeekBar) findViewById(R.id.painBarID);
painBar.setOnSeekBarChangeListener(this);
// end bars
dPick = (DatePicker) findViewById(R.id.datePicker1);
tPick = (TimePicker) findViewById(R.id.timePicker1);
noteField = (EditText) findViewById(R.id.noteTextFieldID);
enterButton = (Button) findViewById(R.id.enterButtonID);
} catch (Exception onCreateException) {
Log.e(TAG, "Exception received", onCreateException);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
// Bar listener methods
@Override
public void onProgressChanged(SeekBar arg0, int barValue, boolean hFromUser) {
try {
switch (arg0.getId()) {
case R.id.happinessBarID:
happyValue = barValue + 1;
break;
case R.id.energyBarID:
energyValue = barValue + 1;
break;
case R.id.anxietyBarID:
anxietyValue = barValue + 1;
break;
case R.id.painBarID:
painValue = barValue + 1;
break;
}
String debugBarValue = "Happy is " + happyValue + ", Energy is "
+ energyValue + ", Anxiety is " + anxietyValue
+ ", Pain is " + painValue + ".";
System.out.println(debugBarValue);
} catch (Exception BarValueException) {
Log.e(TAG, "Exception received", BarValueException);
}
}
@Override
public void onStartTrackingTouch(SeekBar happyBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar happyBar) {
// TODO Auto-generated method stub
}
// end Bar listener methods
// Enter Button listener Method
public void dialogPop(View v) {
try {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
// set Title
alertDialogBuilder.setTitle("title");
// set dialog message
alertDialogBuilder.setMessage("You entered: " + getMood())
.setCancelable(false).setPositiveButton("Okay",
// When Okay button clicked the write mood string to file
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
try {
// This is the string that should be
// written to file
String data = getMood();
// This is the file that should be
// written to
File heapFile = new File(Environment.getExternalStorageDirectory(), "heapFile.csv");
// if file doesn't exists, then create
// it
if (!heapFile.exists()) {
heapFile.createNewFile();
FileWriter heapFileWritter = new FileWriter(
heapFile.getName(), true);
BufferedWriter heapBufferWritter = new BufferedWriter(
heapFileWritter);
heapBufferWritter.write(data);
heapBufferWritter.close();
System.out.println("Done");
}
// true = append file
FileWriter heapFileWritter = new FileWriter(
heapFile.getName(), true);
BufferedWriter heapBufferWritter = new BufferedWriter(
heapFileWritter);
heapBufferWritter.write(data);
heapBufferWritter.close();
System.out.println("Done");
} catch (IOException e) {
e.printStackTrace();
}
}
})
// If they press either the cancel button or the back button
// on their device (Same thing) then close the dialog and
// give the user a chance to change what they've entered
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int id) {
// TODO Auto-generated method stub
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
} catch (Exception buttonListenerException) {
Log.e(TAG, "Exception received", buttonListenerException);
}
return;
}
public String getMood() {
try {
int month = dPick.getMonth();
int day = dPick.getDayOfMonth();
int year = dPick.getYear();
int minute = tPick.getCurrentMinute();
String moodAntePost = "AM";
boolean hourType = tPick.is24HourView();
int moodHour = tPick.getCurrentHour();
if (hourType == false && moodHour > 12) {
moodHour = (moodHour - 12);
moodAntePost = "PM";
} else if (hourType == false && moodHour <= 0) {
moodHour = 12;
} else {
}
String noteText = noteField.getText().toString();
Mood = "Happiness," + happyValue + ",Energy," + energyValue
+ ",Anxiety," + anxietyValue + ",Pain," + painValue
+ ",Date," + month + "/" + day + "/" + year + ",Time,"
+ moodHour + ":" + minute + "," + moodAntePost + ",Note,"
+ noteText;
System.out.println(Mood);
} catch (Exception getMoodException) {
Log.e(TAG, "Exception received", getMoodException);
}
return Mood;
}
}
編輯我的問題，包括清單，所以你可以看到我的權限。我認爲這是正確的，但我不能肯定......
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.loch.meaptracker"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.loch.meaptracker.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.google.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>
</application>
</manifest>
快速問題，您是否添加了「WRITE_EXTERNAL_STORAGE」和「READ_EXTERNAL_STORAGE」的權限？ –
哦對！讓我編輯並在問題中包含我的清單。雖然我認爲我確實是對的，但可能會在這方面有所作爲。 – fauxfire76
我實際上並不需要包含讀取外部存儲的權限，因爲我從來沒有真正需要有關文件的內容。還沒有。當我包含我計劃的其他一些功能時，我將需要在此程序的更高版本中執行此操作。 – fauxfire76