onClickActionListener Android

Question

这是我在Android上的代码我在Android上相当新,这是我的onClick方法.每当我运行此应用程序,然后单击按钮.它说"WordCounterApp已停止工作".这个应用程序用于计算用户在任何一个帮助下估算的单词数量？

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);   
            }
        });
    }
}

Answer 1

使用

 textView2.setText(""+wordCount);   

要么

 textView2.setText(String.valueOf(wordCount)); 

代替

 textView2.setText(wordCount);  

因为您无法直接将Int设置为TextView,所以您需要先将其转换为String