我是Android编程的新手,我正在学习本教程:https://www.youtube.com/watch?v=pZaRNVwKAy4。我完全按照教程,但Eclipse设法找到很多错误。它说花括号是不正确的,但当我选择一个时,它对应的那个亮起来,它们都形成一对。此外,Eclipse无法识别我在onCreate方法之前声明的变量。这是代码:
package com.example.tutorialproject;
import android.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TextView;
public class TutorialOne extends Activity implements OnCheckedChangeListener{
TextView = textOut;
EditText = textIn;
RadioGroup = gravityG, styleG;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.tutorial1);
textOut = (TextView) findViewById(R.id.tvChange);
textIn = (EditText) findViewById(R.id.editText1);
gravityG = (RadioGroup) findViewById(R.id.rgGravity);
styleG = (RadioGroup) findViewById(R.id.rgStyle);
Button gen = (Button) findViewById(R.id.bGenerate);
gen.setOnClickListener(new View.OnClickListener() {
public void onClick(View v){
textOut.setText(textIn.getText());
}
});
}
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch (checkedId){
case R.id.rbLeft:
textOut.setGravity(Gravity.LEFT);
break;
case R.id.rbCenter:
textOut.setGravity(Gravity.CENTER);
break;
case R.id.rbRight:
textOut.setGravity(Gravity.RIGHT);
break;
}
}
}
剪切/粘贴和清洁不起作用,我已经尝试过了。任何人都知道可能是什么问题?对不起,很长的帖子。
提前致谢
答案 0 :(得分:3)
TextView = textOut;
EditText = textIn;
RadioGroup = gravityG, styleG;
摆脱=
。你可以在这里找到member variables