android - 按下按钮时如何添加到 TextView

Question

我知道这已经被问过了，但我无法完成这项工作，所以到目前为止

class Click extends Activity {
int i=0;
protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.activity_main);
    final TextView mTextView = (TextView) findViewById(R.id.Counter);
    mTextView.setText(""+i);

    final Button button = (Button) findViewById(R.id.AddOne);
    button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // Perform action on click
            TextView tv= (TextView) findViewById(R.id.Counter);

            i=i+1;
            mTextView.setText(Integer.toString(i));
        }
    });
}

每次我在模拟器中运行应用程序时，它都会崩溃

 java.lang.IllegalStateException: Could not find a method Click(View) in the activity class com.scouting.corbin.frc_201415_scouting.MainActivity for onClick handler on view class android.widget.Button with id 'AddOne'

我知道这可能完全是愚蠢的，但是我对此并不陌生，需要帮助，谢谢您。

Answer 1

根据您的logcat。

java.lang.IllegalStateException: Could not find a method Click(View) in the activity class com.scouting.corbin.frc_201415_scouting.MainActivity for onClick handler on view class android.widget.Button with id 'AddOne'

我建议您在 Click(View v)中添加 MainActivity

public void Click(View v)
{

}