Android：TextView导致应用崩溃

Question

I am trying to get a TextView to display a string depending on a condition. However, when I tried to implement it, it causes the app to stop working. Here is the relevant code/xml:

// class declaration, etc.
TextView textString;

// other code

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_name);
    ...
    textString = (TextView) findViewById(R.id.textId);
    ...

@Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.button_id:
        ...

            if(getNum(0) == 10) {
                textString = (TextView) findViewById(R.id.textId);
                textString.setText("String 1");
            }
            if(getNum(1) == 10) {
                textString = (TextView) findViewById(R.id.textId);
                textString.setText("String 2");
            }
            // etc.

getNum(int index) is a method I wrote that returns an integer from an array given an index.

XML Code for TextView:

<TextView
    android:id="@+id/textId"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/other_id"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="25dp" />

Why is it crashing?

Edit* Here is the the LogCat:

I am not sure how much of it you need.

Answer 1

IF your code is good and consistent, button = button and textview = textview, clean your project. I've seen issues like this resolved by using the clean function in eclipse.