设置文本时 TextView 崩溃

Question

由于某种原因，当我尝试设置 textview 的文本时，我的应用程序崩溃了？我怎么能克服这个。

private TextView strStatus;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
    txtUsername = (EditText) findViewById(R.id.username);
    strStatus = (TextView) findViewById(R.id.status);
    //strStatus.setText("test"); // SEEMS TO BE CAUSING THE CRASH
    setContentView(R.layout.main);   
}

<TextView
android:id="@+id/status"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>

Answer 1

一个小错误，你应该先做那个 setContentView

  @Override
    public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        txtUsername = (EditText) findViewById(R.id.username);
        strStatus = (TextView) findViewById(R.id.status);
        strStatus.setText("test"); 

    }