在我编写的程序中，几乎所有东西都可以工作。当我在UI中进行更改时，一切都设置正确。由于我无法弄清楚的原因，当我点击主UI的进入按钮时，应用程序强制异常关闭。从日志中…
. lang。View类android.widget.Button的onClick处理程序id为'enterButtonID'
程序代码如下。Eclipse不会标记任何错误或警告。我有点不知所措，看着这些我都累坏了。如有任何帮助，我将不胜感激。
package com.loch.meaptracker;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import android.os.Bundle;
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.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";
final Context context = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 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("heapFile.csv");
// if file doesn't exists, then create
// it
if (!heapFile.exists()) {
heapFile.createNewFile();
}
// 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;
}
}
请检查XML代码。我认为在你的XML标签有一个属性你已经添加android:onClick="enterMood"....试着删除它并运行它
使用android: onClick = " dialogPop "而不是
您的点击处理程序格式不正确。它需要包含一个视图参数，以便XML单击处理程序正常工作。
public void getMood(View view){
}