我试图让某些复选框的检查确定要运行的公式。该类的代码如下。问题中的代码是注释掉的代码。
package com.mikitz.rogsimple;
import org.apache.commons.lang3.math.NumberUtils;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
public class SaACharisma extends Activity {
EditText charisma, persuasion, elicitation, animalhandling;
TextView charismafpvalue, persuasionfpvalue, elicitationfpvalue, animalhandlingfpvalue;
TextView fpr;
CheckBox timid, sanguine;
SharedPreferences pref;
String getcharisma, getpersuasion, getelicitation, getanimalhandling;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.saa_charisma);
pref = getSharedPreferences("Character1", Context.MODE_PRIVATE);
fpr = (TextView) findViewById(R.id.fpr);
pref.getBoolean("timid", false);
pref.getBoolean("sanguine", false);
charismafpvalue = (TextView) findViewById(R.id.charismafpvalue);
persuasionfpvalue = (TextView) findViewById(R.id.persuasionfpvalue);
elicitationfpvalue = (TextView) findViewById(R.id.elicitationfpvalue);
animalhandlingfpvalue = (TextView) findViewById(R.id.animalhandlingfpvalue);
charisma = (EditText) findViewById(R.id.charisma);
persuasion = (EditText) findViewById(R.id.persuasion);
elicitation = (EditText) findViewById(R.id.elicitation);
animalhandling = (EditText) findViewById(R.id.animalhandling);
getcharisma = pref.getString("charisma", "");
getpersuasion = pref.getString("persuasion", "");
getelicitation = pref.getString("elicitation", "");
getanimalhandling = pref.getString("animalhandling", "");
charisma.setText(getcharisma);
persuasion.setText(getpersuasion);
elicitation.setText(getelicitation);
animalhandling.setText(getanimalhandling);
float CHRV = NumberUtils.toFloat(charisma.getText().toString(), 0.0f);
charismafpvalue.setText(Float.toString((CHRV + 1) * CHRV));
float PERV = NumberUtils.toFloat(persuasion.getText().toString(), 0.0f);
persuasionfpvalue.setText(Float.toString((PERV + 1) * PERV));
float ELIV = NumberUtils.toFloat(elicitation.getText().toString(), 0.0f);
elicitationfpvalue.setText(Float.toString((ELIV + 1) * ELIV));
float AMLV = NumberUtils.toFloat(animalhandling.getText().toString(), 0.0f);
animalhandlingfpvalue.setText(Float.toString((AMLV + 1) * AMLV));
// if (timid.isChecked()) {
// charismafpvalue.setText(Float.toString(((CHRV + 1) * CHRV) * 2));
// } else {
// charismafpvalue.setText(Float.toString((CHRV + 1) * CHRV));
// }
// if (sanguine.isChecked()) {
// charismafpvalue.setText(Float.toString(((CHRV + 1) * CHRV) / 2));
// } else {
// charismafpvalue.setText(Float.toString((CHRV + 1) * CHRV));
// }
float FP = NumberUtils.toFloat(pref.getString("fp", ""));
float HLTH = NumberUtils.toFloat(pref.getString("healthfpvalue", ""));
float CHR = NumberUtils.toFloat(charismafpvalue.getText().toString(), 0.0f);
float PER = NumberUtils.toFloat(persuasionfpvalue.getText().toString(), 0.0f);
float ELI = NumberUtils.toFloat(elicitationfpvalue.getText().toString(), 0.0f);
float AML = NumberUtils.toFloat(animalhandlingfpvalue.getText().toString(), 0.0f);
float MAN = NumberUtils.toFloat(pref.getString("manipulationfpvalue", ""));
float ACT = NumberUtils.toFloat(pref.getString("actingfpvalue", ""));
float SED = NumberUtils.toFloat(pref.getString("seductionfpvalue", ""));
float INTM = NumberUtils.toFloat(pref.getString("intimidationfpvalue", ""));
float INT = NumberUtils.toFloat(pref.getString("intelligencefpvalue", ""));
float TRP = NumberUtils.toFloat(pref.getString("trappingfpvalue", ""));
float FOR = NumberUtils.toFloat(pref.getString("forgingfpvalue", ""));
float CON = NumberUtils.toFloat(pref.getString("concoctionsfpvalue", ""));
float DEX = NumberUtils.toFloat(pref.getString("dexterityfpvalue", ""));
float ACR = NumberUtils.toFloat(pref.getString("acrobaticsfpvalue", ""));
float DOD = NumberUtils.toFloat(pref.getString("dodgingfpvalue", ""));
float RC = NumberUtils.toFloat(pref.getString("rangedfpvalue", ""));
float STR = NumberUtils.toFloat(pref.getString("strengthfpvalue", ""));
float MEL = NumberUtils.toFloat(pref.getString("meleefpvalue", ""));
float H2H = NumberUtils.toFloat(pref.getString("h2hfpvalue", ""));
float PRY = NumberUtils.toFloat(pref.getString("pryfpvalue", ""));
float WIT = NumberUtils.toFloat(pref.getString("witsfpvalue", ""));
float STL = NumberUtils.toFloat(pref.getString("stealthfpvalue", ""));
float WILD = NumberUtils.toFloat(pref.getString("wildernessfpvalue", ""));
float TRA = NumberUtils.toFloat(pref.getString("trackingfpvalue", ""));
float QI = NumberUtils.toFloat(pref.getString("qifpvalue", ""));
float FIRE = NumberUtils.toFloat(pref.getString("firefpvalue", ""));
float WAT = NumberUtils.toFloat(pref.getString("waterfpvalue", ""));
float EAR = NumberUtils.toFloat(pref.getString("earthfpvalue", ""));
float AIRV = NumberUtils.toFloat(pref.getString("airfpvalue", ""));
fpr.setText(Float.toString(FP - (QI + FIRE + WAT + EAR + AIRV + WIT + STL + WILD + TRA + STR + MEL + H2H +
PRY + MAN + ACT + SED + INTM + INT + TRP + FOR + CON + HLTH + CHR + PER + ELI + AML + DEX + ACR + DOD + RC)));
// TEXT WATCHERS
TextWatcher watcher = new TextWatcher() {
public void afterTextChanged(Editable s) {
float CHRV = NumberUtils.toFloat(charisma.getText().toString(), 0.0f);
charismafpvalue.setText(Float.toString((CHRV + 1) * CHRV));
float PERV = NumberUtils.toFloat(persuasion.getText().toString(), 0.0f);
persuasionfpvalue.setText(Float.toString((PERV + 1) * PERV));
float ELIV = NumberUtils.toFloat(elicitation.getText().toString(), 0.0f);
elicitationfpvalue.setText(Float.toString((ELIV + 1) * ELIV));
float AMLV = NumberUtils.toFloat(animalhandling.getText().toString(), 0.0f);
animalhandlingfpvalue.setText(Float.toString((AMLV + 1) * AMLV));
float FP = NumberUtils.toFloat(pref.getString("fp", ""));
float HLTH = NumberUtils.toFloat(pref.getString("healthfpvalue", ""));
float CHR = NumberUtils.toFloat(charismafpvalue.getText().toString(), 0.0f);
float PER = NumberUtils.toFloat(persuasionfpvalue.getText().toString(), 0.0f);
float ELI = NumberUtils.toFloat(elicitationfpvalue.getText().toString(), 0.0f);
float AML = NumberUtils.toFloat(animalhandlingfpvalue.getText().toString(), 0.0f);
float MAN = NumberUtils.toFloat(pref.getString("manipulationfpvalue", ""));
float ACT = NumberUtils.toFloat(pref.getString("actingfpvalue", ""));
float SED = NumberUtils.toFloat(pref.getString("seductionfpvalue", ""));
float INTM = NumberUtils.toFloat(pref.getString("intimidationfpvalue", ""));
float INT = NumberUtils.toFloat(pref.getString("intelligencefpvalue", ""));
float TRP = NumberUtils.toFloat(pref.getString("trappingfpvalue", ""));
float FOR = NumberUtils.toFloat(pref.getString("forgingfpvalue", ""));
float CON = NumberUtils.toFloat(pref.getString("concoctionsfpvalue", ""));
float DEX = NumberUtils.toFloat(pref.getString("dexterityfpvalue", ""));
float ACR = NumberUtils.toFloat(pref.getString("acrobaticsfpvalue", ""));
float DOD = NumberUtils.toFloat(pref.getString("dodgingfpvalue", ""));
float RC = NumberUtils.toFloat(pref.getString("rangedfpvalue", ""));
float STR = NumberUtils.toFloat(pref.getString("strengthfpvalue", ""));
float MEL = NumberUtils.toFloat(pref.getString("meleefpvalue", ""));
float H2H = NumberUtils.toFloat(pref.getString("h2hfpvalue", ""));
float PRY = NumberUtils.toFloat(pref.getString("pryfpvalue", ""));
float WIT = NumberUtils.toFloat(pref.getString("witsfpvalue", ""));
float STL = NumberUtils.toFloat(pref.getString("stealthfpvalue", ""));
float WILD = NumberUtils.toFloat(pref.getString("wildernessfpvalue", ""));
float TRA = NumberUtils.toFloat(pref.getString("trackingfpvalue", ""));
float QI = NumberUtils.toFloat(pref.getString("qifpvalue", ""));
float FIRE = NumberUtils.toFloat(pref.getString("firefpvalue", ""));
float WAT = NumberUtils.toFloat(pref.getString("waterfpvalue", ""));
float EAR = NumberUtils.toFloat(pref.getString("earthfpvalue", ""));
float AIRV = NumberUtils.toFloat(pref.getString("airfpvalue", ""));
fpr.setText(Float.toString(FP - (QI + FIRE + WAT + EAR + AIRV + WIT + STL + WILD + TRA + STR + MEL + H2H +
PRY + MAN + ACT + SED + INTM + INT + TRP + FOR + CON + HLTH + CHR + PER + ELI + AML + DEX + ACR + DOD + RC)));
SharedPreferences.Editor editor=pref.edit();
editor.putString("charisma", charisma.getText().toString());
editor.putString("persuasion", persuasion.getText().toString());
editor.putString("animalhandling", animalhandling.getText().toString());
editor.putString("elicitation", elicitation.getText().toString());
editor.putString("charismafpvalue", charismafpvalue.getText().toString());
editor.putString("persuasionfpvalue", persuasionfpvalue.getText().toString());
editor.putString("animalhandlingfpvalue", animalhandlingfpvalue.getText().toString());
editor.putString("elicitationfpvalue", elicitationfpvalue.getText().toString());
editor.commit();
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
};
charisma.addTextChangedListener(watcher);
persuasion.addTextChangedListener(watcher);
elicitation.addTextChangedListener(watcher);
animalhandling.addTextChangedListener(watcher);
}
@Override
public void onBackPressed()
{
Intent intent = new Intent (this, NewSkillsAndAttributes.class);
startActivity(intent);
}
}
问题是这会导致应用在启动活动时崩溃。我哪里错了？
这里是logcat：
09-23 10:31:55.261: E/AndroidRuntime(1577): FATAL EXCEPTION: main
09-23 10:31:55.261: E/AndroidRuntime(1577): Process: com.mikitz.rogsimple, PID: 1577
09-23 10:31:55.261: E/AndroidRuntime(1577): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mikitz.rogsimple/com.mikitz.rogsimple.SaACharisma}: java.lang.NullPointerException
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.app.ActivityThread.access$800(ActivityThread.java:135)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.os.Handler.dispatchMessage(Handler.java:102)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.os.Looper.loop(Looper.java:136)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.app.ActivityThread.main(ActivityThread.java:5017)
09-23 10:31:55.261: E/AndroidRuntime(1577): at java.lang.reflect.Method.invokeNative(Native Method)
09-23 10:31:55.261: E/AndroidRuntime(1577): at java.lang.reflect.Method.invoke(Method.java:515)
09-23 10:31:55.261: E/AndroidRuntime(1577): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
09-23 10:31:55.261: E/AndroidRuntime(1577): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
09-23 10:31:55.261: E/AndroidRuntime(1577): at dalvik.system.NativeStart.main(Native Method)
09-23 10:31:55.261: E/AndroidRuntime(1577): Caused by: java.lang.NullPointerException
09-23 10:31:55.261: E/AndroidRuntime(1577): at com.mikitz.rogsimple.SaACharisma.onCreate(SaACharisma.java:180)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.app.Activity.performCreate(Activity.java:5231)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
09-23 10:31:55.261: E/AndroidRuntime(1577): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
09-23 10:31:55.261: E/AndroidRuntime(1577): ... 11 more
09-23 10:31:57.001: I/Process(1577): Sending signal. PID: 1577 SIG: 9
答案 0 :(得分：0)
对于SharedPrefs，我使用代码段。
public class SharedPrefsHelper
{
private static Map<String, Boolean> prefsBool = new ConcurrentHashMap<String, Boolean>();
private static Map<String, String> prefsString = new ConcurrentHashMap<String, String>();
private static Map<String, Long> prefsLong = new ConcurrentHashMap<String, Long>();
public static SharedPreferences.Editor getEditor(Context ctx)
{
SharedPreferences sharedPreferences = ctx.getSharedPreferences(Constants.Prefs.PREFS_NAME, Context.MODE_PRIVATE);
return sharedPreferences.edit();
}
public static SharedPreferences getPrefs(Context ctx)
{
return ctx.getSharedPreferences(Constants.Prefs.PREFS_NAME, Context.MODE_PRIVATE);
}
public static boolean getBoolean(Context context, String key, boolean defaultVal)
{
if (prefsBool.containsKey(key))
{
return prefsBool.get(key);
} else
{
boolean val = getPrefs(context).getBoolean(key, defaultVal);
prefsBool.put(key, val);
return val;
}
}
public static String getString(Context context, String key, String defValue)
{
if (prefsString.containsKey(key))
{
return prefsString.get(key);
} else
{
String val = getPrefs(context).getString(key, defValue);
prefsString.put(key, val);
return val;
}
}
public static long getLong(Context context, String key, long defValue)
{
if (prefsLong.containsKey(key))
{
return prefsLong.get(key);
} else
{
long val = getPrefs(context).getLong(key, defValue);
prefsLong.put(key, val);
return val;
}
}
public static void putString(Context context, String key, String val)
{
prefsString.put(key, val);
SharedPreferences.Editor editor = getEditor(context);
editor.putString(key, val);
editor.commit();
}
public static void putBoolean(Context context, String key, boolean val)
{
prefsBool.put(key, val);
SharedPreferences.Editor editor = getEditor(context);
editor.putBoolean(key, val);
editor.commit();
}
public static void putLong(Context context, String key, long val)
{
prefsLong.put(key, val);
getEditor(context).putLong(key, val).commit();
}
}