android-onClickActionListener的問題

onClickActionListener的問題

我onClick方法的代碼，實現功能是計算用戶輸入的字符數。每次我運行點擊按鈕之後，都會說WordCounterApp has stopped working。多謝幫忙解決。

package com.example.wordcountapp;

public class MainActivity extends Activity {
    private TextView textView2;
    private Button button1;
    private EditText editText1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView2 = (TextView) findViewById(R.id.textView2);
        button1 = (Button) findViewById(R.id.button1);
        editText1 = (EditText) findViewById(R.id.editText1);

        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String str = editText1.getText().toString();
                String input = str; 
                int wordCount =  -1;
                String array[] = input.trim().split(" ");
                if( "".equals(input) ||
                    "\n".equals(input)) {
                    wordCount = 0;
                }
                else{
                    wordCount = array.length;
                }
                textView2.setText(wordCount);   
            }
        });
    }
}

最佳回答：

textView2.setText(wordCount + "");