java - Android Studio 错误 : Cannot resolve symbol 'View'

Question

我正在尝试按照 Google 的本教程使用 Android Studio 创建您自己的 Android 应用。但是当我按照此页面上的第 4 步操作时:http://developer.android.com/training/basics/firstapp/starting-activity.html Android Studio 最终出现此错误:

Cannot resolve symbol 'View'

这就是我的代码现在的样子:

public class MainActivity extends ActionBarActivity {
    /** Called when the user clicks the Send button */
    public void sendMessage(View view) { <--- (This line ends up with the error)
        // Do something in response to button
    }

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


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

这段代码有什么问题？我对java没有经验，在查看了其他问题后，我仍然找不到正确的解决方案。

感谢您的帮助!

Answer 1

我认为您忘记包含 View 的导入语句。在您的代码中添加以下导入

import android.view.View;