你好朋友我正在我的应用程序中集成语言集成，所以下面是我的代码
Main.java
public class ActivitySetting extends Activity {
Locale myLocale;
RadioButton mRadioButtonMile;
RadioButton mRadioButtonKiloMile;
Spinner mSpinnerLanguage;
String selectedItem="";
BathRoomAdapter mLanAdapter;
String mStringGetCurrency;
String ll;
String[] mStringsArrayLanguage = new String[] { "English",
"German", "Russian", "Spanish" };
public static final String MY_PREF = "MyPreferences";
AdView mAdView;
LinearLayout layout;
boolean firstAdReceived = true;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.settings);
ActionBar actionBar = getActionBar();
actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#932691")));
actionBar.setTitle(R.string.set);
actionBar.setHomeButtonEnabled(true);
mSpinnerLanguage=(Spinner)findViewById(R.id.spn_single_mul_type);
mRadioButtonMile=(RadioButton)findViewById(R.id.rad_ml);
mRadioButtonKiloMile=(RadioButton)findViewById(R.id.rad_km);
mLanAdapter=new BathRoomAdapter(mStringsArrayLanguage);
mSpinnerLanguage.setAdapter(mLanAdapter);
SharedPreferences mSharedPreferences = getSharedPreferences("MyPreferences", 0);
mStringGetCurrency=mSharedPreferences.getString("units", "");
SharedPreferences mSharedPreferences1 = getSharedPreferences("CommonPrefs", 0);
ll=mSharedPreferences1.getString("in", "");
if (ll.equalsIgnoreCase("English")) {
mSpinnerLanguage.setSelection(0);
}
else if (ll.equalsIgnoreCase("German")) {
mSpinnerLanguage.setSelection(1);
}
else if (ll.equalsIgnoreCase("Russian")) {
mSpinnerLanguage.setSelection(2);
}
else if (ll.equalsIgnoreCase("Spanish")) {
mSpinnerLanguage.setSelection(3);
}
mAdView = new AdView(ActivitySetting.this);
mAdView.setAdSize(AdSize.SMART_BANNER);
mAdView.setAdUnitId(getResources().getString(R.string.admob_unit_id)); //its a your admob key declare in String File.
mAdView.setAdListener(new AdListener() {
@Override
public void onAdLoaded() {
firstAdReceived = true;
mAdView.setVisibility(View.VISIBLE);
}
@Override
public void onAdFailedToLoad(int error) {
if (!firstAdReceived) {
mAdView.setVisibility(View.GONE);
}
}
});
layout = (LinearLayout) findViewById(R.id.adLayout);
layout.addView(mAdView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
if (mStringGetCurrency.equalsIgnoreCase("K")) {
mRadioButtonKiloMile.setChecked(true);
mRadioButtonMile.setChecked(false);
}
else {
mRadioButtonKiloMile.setChecked(false);
mRadioButtonMile.setChecked(true);
}
mRadioButtonKiloMile.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
SharedPreferences sp = getSharedPreferences(MY_PREF, 0);
SharedPreferences.Editor edit = sp.edit();
edit.putString("units", "K");
edit.commit();
}
});
mRadioButtonMile.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
SharedPreferences sp = getSharedPreferences(MY_PREF, 0);
SharedPreferences.Editor edit = sp.edit();
edit.putString("units", "M");
edit.commit();
}
});
mSpinnerLanguage.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,int position, long id) {
selectedItem=mStringsArrayLanguage[position].toString() ;
if (selectedItem .equalsIgnoreCase("English")) {
changeLang("en");
} else if (selectedItem .equalsIgnoreCase("German")) {
changeLang("de");
} else if (selectedItem.equalsIgnoreCase("Russian")) {
changeLang("ru");
} else if (selectedItem .equalsIgnoreCase("Spanish")) {
changeLang("es");
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
public class BathRoomAdapter extends ArrayAdapter<String>
{
String ds[];
public BathRoomAdapter(String[] list) {
super( ActivitySetting.this, R.layout.spin_layout, list);
this.ds = list;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
convertView= getLayoutInflater().inflate(R.layout.spin_layout, null);
TextView imageView = (TextView)convertView.findViewById(android.R.id.text1);
imageView.setText(ds[position]);
return convertView;
}
}
public void loadLocale()
{
String langPref = "Language";
SharedPreferences prefs = getSharedPreferences("CommonPrefs", Activity.MODE_PRIVATE);
String language = prefs.getString(langPref, "en");
selectedItem=prefs.getString("in", "");
changeLang(language);
}
public void changeLang(String lang)
{
if (lang.equalsIgnoreCase(""))
return;
myLocale = new Locale(lang);
saveLocale(lang);
Locale.setDefault(myLocale);
android.content.res.Configuration config = new android.content.res.Configuration();
config.locale = myLocale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
}
public void saveLocale(String lang)
{
String langPref = "Language";
SharedPreferences prefs = getSharedPreferences("CommonPrefs", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putString(langPref, lang);
editor.putString("in", selectedItem);
editor.commit();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.next, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case android.R.id.home:
Intent mIntentq=new Intent(ActivitySetting.this, MainActivity.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(mIntentq);
return true;
case R.id.cl:
Intent mIntent22=new Intent(ActivitySetting.this, MainActivity.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(mIntent22);
return true;
case R.id.cd:
Intent mIntent=new Intent(ActivitySetting.this, ActivityFav.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(mIntent);
return true;
case R.id.normal:
Intent mIntent1=new Intent(ActivitySetting.this, About.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(mIntent1);
return true;
case R.id.satelite:
Intent mIntent2=new Intent(ActivitySetting.this, Contact.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(mIntent2);
return true;
case R.id.pin:
Intent mIntent21=new Intent(ActivitySetting.this, PinActivity.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(mIntent21);
return true;
case R.id.st:
Intent mIntent2ss1=new Intent(ActivitySetting.this, ActivitySetting.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(mIntent2ss1);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/** Called when leaving the activity */
/** Called when returning to the activity */
@Override
public void onResume() {
super.onResume();
loadLocale();
}
/** Called before the activity is destroyed */
@Override
public void onDestroy() {
super.onDestroy();
System.gc();
unbindDrawables(layout);
}
private void unbindDrawables(View view)
{
if (view.getBackground() != null)
{
view.getBackground().setCallback(null);
}
try
{
((ViewGroup) view).removeAllViews();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
当我更改语言时，它会在此行中给出错误Null指针 actionBar.setBackgroundDrawable（new ColorDrawable（Color.parseColor（“＃932691”）））;
任何想法我怎么能解决这个问题？