private int ServiceLeft;
private int ServiceRight;
private int Services;
final TextView countTextViewPlusL = (TextView) findViewById(R.id.TextViewCountL);
final Button ServiceButtonLeft = (Button) findViewById(R.id.ButtonServiceLeft);
final TextView countTextViewPlusR = (TextView) findViewById(R.id.TextViewCountR);
final Button ServiceButtonRight = (Button) findViewById(R.id.ButtonServiceRight);
ServiceButtonLeft.setOnClickListener(listener);
ServiceButtonRight.setOnClickListener(listener);
View.OnClickListener listener = new View.OnClickListener() {
public void onClick(View v) {
switch(v.getId()) {
case R.id.ButtonServiceRight:
ServiceRight++;
break;
case R.id.ButtonServiceLeft:
ServiceLeft++;
break;
}
if(Services % 2 == 0) {
getDrawable(R.drawable.test);
}
}
};
我在这两行上出错:在“听众”一词
ServiceButtonLeft.setOnClickListener(listener);
ServiceButtonRight.setOnClickListener(listener);
答案 0 :(得分:0)
public class MyActivity extends Activity implements OnclickListener{
private int ServiceLeft;
private int ServiceRight;
private int Services;
@Override
public void onCreate(Bundle savedInstance){
super(savedInstance);
setContent(R.layout.main);
final TextView countTextViewPlusL = (TextView) findViewById(R.id.TextViewCountL);
final Button ServiceButtonLeft = (Button) findViewById(R.id.ButtonServiceLeft);
final TextView countTextViewPlusR = (TextView) findViewById(R.id.TextViewCountR);
final Button ServiceButtonRight = (Button) findViewById(R.id.ButtonServiceRight);
//set Listeners for your buttons
ServiceButtonLeft.setOnClickListener(this);
ServiceButtonRight.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.ButtonServiceRight:
ServiceRight++;
break;
case R.id.ButtonServiceLeft:
ServiceLeft++;
break;
}
if(Services % 2 == 0) {
getDrawable(R.drawable.test);
}
} }
答案 1 :(得分:0)
尝试使用后,您可以创建“监听器”。试试这种方式。
View.OnClickListener listener = new View.OnClickListener() {
public void onClick(View v) {
switch(v.getId()) {
case R.id.ButtonServiceRight:
ServiceRight++;
break;
case R.id.ButtonServiceLeft:
ServiceLeft++;
break;
}
if(Services % 2 == 0) {
getDrawable(R.drawable.test);
}
}
};
ServiceButtonLeft.setOnClickListener(listener);
ServiceButtonRight.setOnClickListener(listener);
答案 2 :(得分:0)
在变量创建之前不可能使用(甚至引用)变量。你需要使用“listener”移动这两行
ServiceButtonLeft.setOnClickListener(listener);
ServiceButtonRight.setOnClickListener(listener);
在您创建它之后,即您在上面提供的代码段中的最后一行。然后它会工作。
答案 3 :(得分:0)
试试这个:
public OnClickListener listener = new OnClickListener() {
@Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.ButtonServiceRight:
ServiceRight++;
break;
case R.id.ButtonServiceLeft:
ServiceLeft++;
break;
}
if(Services % 2 == 0) {
getDrawable(R.drawable.test);
}
}
};
已编辑的部分: 尝试使用以下代码替换您的问题代码:
private int ServiceLeft;
private int ServiceRight;
private int Services;
final TextView countTextViewPlusL = (TextView) findViewById(R.id.TextViewCountL);
final Button ServiceButtonLeft = (Button) findViewById(R.id.ButtonServiceLeft);
final TextView countTextViewPlusR = (TextView) findViewById(R.id.TextViewCountR);
final Button ServiceButtonRight = (Button) findViewById(R.id.ButtonServiceRight);
OnClickListener listener; //This line is the only change to your code.
ServiceButtonLeft.setOnClickListener(listener);
ServiceButtonRight.setOnClickListener(listener);
View.OnClickListener listener = new View.OnClickListener() {
public void onClick(View v) {
switch(v.getId()) {
case R.id.ButtonServiceRight:
ServiceRight++;
break;
case R.id.ButtonServiceLeft:
ServiceLeft++;
break;
}
if(Services % 2 == 0) {
getDrawable(R.drawable.test);
}
}
};