我无法为RatingBar设置评分。下面是我的代码。如何为动态添加的RatingBar设置默认评分?
这是我的代码。
public class DialogRate extends Activity implements OnRatingBarChangeListener {
...
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dialog_layout);
LinearLayout ll_dialog = (LinearLayout) findViewById(R.id.linearLayout_dialog);
final RatingBar rate_bar = new RatingBar(context);
rate_bar.setOnRatingBarChangeListener(this);
rate_bar.setStepSize((float) 0.5);
rate_bar.setMax(5);
rate_bar.setId(1);
rate_bar.setRating(2.0f); // Error occur on this line!
ll_dialog.addView(rate_bar);
}
...
public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
// TODO Auto-generated method stub
TextView rate_val = (TextView) findViewById(0);
rate_val.setText(Float.toString(ratingBar.getRating()));
}
错误栈:
Thread [<1> main] (Suspended)
ActivityThread.performLaunchActivity(ActivityThread$ActivityClientRecord, Intent) line: 1645
ActivityThread.handleLaunchActivity(ActivityThread$ActivityClientRecord, Intent) line: 1663
ActivityThread.access$1500(ActivityThread, ActivityThread$ActivityClientRecord, Intent) line: 117
ActivityThread$H.handleMessage(Message) line: 931
ActivityThread$H(Handler).dispatchMessage(Message) line: 99
Looper.loop() line: 123
ActivityThread.main(String[]) line: 3683
Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method]
Method.invoke(Object, Object...) line: 507
ZygoteInit$MethodAndArgsCaller.run() line: 839
ZygoteInit.main(String[]) line: 597
NativeStart.main(String[]) line: not available [native method]
关闭
很抱歉,这个错误很简单。在 setRating 后,onRatingChanged 中动态创建了 TextView。
setNumStars()
。 - zaplrate_bar.setNumStars(5);
。请将 logcat 中的完整错误信息添加到您的帖子中。如果没有错误信息,那么我们只能进行猜测。 - zapl