android-点击button没有事件

Question

在activity中有一个button，在点击之后到toast，响应的事件没有触发：

public class myActivity extends Activity implements OnClickListener {
    EditText nameEditText;
    Button okButton;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        nameEditText = (EditText) findViewById(R.id.editText);
        okButton = (Button) findViewById(R.id.button);
    }
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
        case R.id.button:
            Toast.makeText(myActivity.this, "Pressed", Toast.LENGTH_LONG)
                    .show();
            break;
        default:
            break;
        }
    }
}

Answer 1

你忘了给按钮添加监听。
因为activity已经执行onClickListener接口，因此需要在
okButton = (Button) findViewById(R.id.button)之后添加okButton.setOnClickListener(this);

在你的onCreate函数中用下面的代码：

myActivity.java

public class myActivity extends Activity implements OnClickListener {

        EditText nameEditText;
        Button okButton;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            nameEditText = (EditText) findViewById(R.id.editText);
            okButton = (Button) findViewById(R.id.button);
                okButton.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            switch (v.getId()) {
            case R.id.button:
                Toast.makeText(myActivity.this, "Pressed", Toast.LENGTH_LONG)
                        .show();
                break;

            default:
                break;
            }
        }
    }