我在SharedPreferences得到的NullPointerException获得NullPointerException异常。这里是我的代码:在SharedPreferences
public void onClick(View v) {
phone = (EditText) findViewById(R.id.phoneno);
final String number = phone.getText().toString();
new AlertDialog.Builder(MainActivity.this)
.setMessage("Confirm your number:+91-" + number)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString(Phone, number);
editor.commit();
Intent intent = new Intent(MainActivity.this, Navigationfarmer.class);
startActivity(intent);
finish();
}
})
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do nothing
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
}
的logcat:
显示java.lang.NullPointerException
在wolverine.example.com.btp_farmer.MainActivity $ 1 $ 2.onClick(MainActivity.java:43)
在android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper的.java:137) (MainActi vity.java:43):SharedPreferences.Editor编辑= sharedpreferences.edit();
凡sharedpreferences变量分配要在其上调用编辑方法....'sharedpreferences.edit()'。邮政的代码太 – Psypher
@ɥʇᴉɾuɐɹ,HTTP://justpaste.it/maam – adafrwefsefr
把你的'MainActivity'代码 – Rustam