获得NullPointerException异常，而试图从EditText上提取文本 [英] Getting NullPointerException while trying to extract text from EditText

问题描述

我在这得到一个 NullPointerException异常 的onClick（） - 方法。在与

I'm getting a NullPointerException on this onClick()-method. On the line with

String standardT = smsText.getText().toString().

这是 setStandardSMS 方法和 alertDialog 我有问题。

public void setStandardSMS(){
AlertDialog.Builder standardSMSBuilder = new AlertDialog.Builder(this);
LayoutInflater inflater = this.getLayoutInflater();
View view = inflater.inflate(R.layout.standard_text, null)
standardSMSBuilder.setView(view);
final EditText smsText = (EditText)view.findViewById(R.id.standard_sms);
standardSMSBuilder.setPositiveButton(R.string.saveButton, new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
    Context context = getApplicationContext();

    CharSequence text = "Du maa fylle inn alle felt!";
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(context, text, duration);
    String standardT = smsText.getText().toString();

    if(TextUtils.isEmpty(standardT)){
        Intent newIntent = getIntent();
        newIntent.putExtra("tag_text_txt", standardT);
        setResult(2, newIntent);
    } else {
        toast.show();
    }

}
});

smsDialog = standardSMSBuilder.create();
standardSMSBuilder.show();
}

standard_text.xml

standard_text.xml

<EditText 
    android:id="@+id/standard_sms"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:paddingLeft="4dp"
    android:paddingRight="4dp"
    android:gravity="top"
    android:lines="8"
    android:background="@drawable/border"
    android:inputType="textMultiLine"
/>

我真正想要的是节省了用户写入，到数据库中的文字。但是，code不断打破这里。

All I really want is to save the text which the user writes in, into a database. But the code keeps breaking here.

任何人能发现我在做什么错了？

Can anyone spot what I am doing wrong?

更新：更新与整个setStandardSMS法和standard_text.xml

UPDATE: Updated with the whole setStandardSMS-method, and standard_text.xml.

推荐答案

尝试使用这种

public void setStandardSMS(){
AlertDialog.Builder standardSMSBuilder = new AlertDialog.Builder(this);
LayoutInflater inflater = this.getLayoutInflater();
View view = inflater.inflate(R.layout.standard_text, null)
standardSMSBuilder.setView(view);
final EditText smsText = (EditText)view.findViewById(R.id.standard_sms);
standardSMSBuilder.setPositiveButton(R.string.saveButton, new DialogInterface.OnClickListener() {

    @Override
    public void onClick(DialogInterface dialog, int which) {
        Context context = getApplicationContext();

        CharSequence text = "Du maa fylle inn alle felt!";
        int duration = Toast.LENGTH_SHORT;
        Toast toast = Toast.makeText(context, text, duration);
        String standardT = smsText.getText().toString();

        if(TextUtils.isEmpty(standardT)){
            Intent newIntent = getIntent();
            newIntent.putExtra("tag_text_txt", standardT);
            setResult(2, newIntent);
        } else {
            toast.show();
        }

    }
});

smsDialog = standardSMSBuilder.create();
standardSMSBuilder.show();
}

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