Android 定义触觉?
嘿!我需要为定义登录按钮的类实现startActivity。如何实现startActivity()的功能 这是我的班级:Android 定义触觉?,android,button,android-intent,Android,Button,Android Intent,嘿!我需要为定义登录按钮的类实现startActivity。如何实现startActivity()的功能 这是我的班级: public class LoginButton extends ImageButton { private Facebook mFb; private Handler mHandler; private SessionListener mSessionListener = new SessionListener(); private Str
public class LoginButton extends ImageButton {
private Facebook mFb;
private Handler mHandler;
private SessionListener mSessionListener = new SessionListener();
private String[] mPermissions;
private Activity mActivity;
public LoginButton(Context context) {
super(context);
}
public LoginButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public LoginButton(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void init(final Activity activity, final Facebook fb) {
init(activity, fb, new String[] {});
}
public void init(final Activity activity, final Facebook fb,
final String[] permissions) {
mActivity = activity;
mFb = fb;
mPermissions = permissions;
mHandler = new Handler();
setBackgroundColor(Color.TRANSPARENT);
setAdjustViewBounds(true);
setImageResource(fb.isSessionValid() ?
R.drawable.logout_button :
R.drawable.login_button);
drawableStateChanged();
SessionEvents.addAuthListener(mSessionListener);
SessionEvents.addLogoutListener(mSessionListener);
setOnClickListener(new ButtonOnClickListener());
}
private final class ButtonOnClickListener implements OnClickListener {
public void onClick(View arg0) {
if (mFb.isSessionValid()) {
SessionEvents.onLogoutBegin();
AsyncFacebookRunner asyncRunner = new AsyncFacebookRunner(mFb);
asyncRunner.logout(getContext(), new LogoutRequestListener());
} else {
mFb.authorize(mActivity, mPermissions,
new LoginDialogListener());
Intent i = new Intent(getContext(), com.Xperia.MultipleOptions.class);
startActivity(i);
}
}
}
private final class LoginDialogListener implements DialogListener {
public void onComplete(Bundle values) {
SessionEvents.onLoginSuccess();
}
public void onFacebookError(FacebookError error) {
SessionEvents.onLoginError(error.getMessage());
}
public void onError(DialogError error) {
SessionEvents.onLoginError(error.getMessage());
}
public void onCancel() {
SessionEvents.onLoginError("Action Canceled");
}
}
private class LogoutRequestListener extends BaseRequestListener {
public void onComplete(String response, final Object state) {
// callback should be run in the original thread,
// not the background thread
mHandler.post(new Runnable() {
public void run() {
SessionEvents.onLogoutFinish();
}
});
}
}
private class SessionListener implements AuthListener, LogoutListener {
public void onAuthSucceed() {
setImageResource(R.drawable.logout_button);
SessionStore.save(mFb, getContext());
}
public void onAuthFail(String error) {
}
public void onLogoutBegin() {
}
public void onLogoutFinish() {
SessionStore.clear(getContext());
setImageResource(R.drawable.login_button);
}
}
}
在第startActivity(i)
行,我得到
The method startActivity(Intent) is undefined for the type
LoginButton.ButtonOnClickListener
有什么想法吗?您需要应用程序上下文来启动新的意图
Yourclass.this.startActivity(something);
您需要应用程序上下文来启动新的意图
Yourclass.this.startActivity(something);
我想这就是为什么你首先定义了mActivity;也许你只是忘了用它
我想这就是为什么你首先定义了mActivity;也许你只是忘了使用它。是的,因为它扩展为imagebutton而不是activity…这意味着这个类不是activity类型的类,或者你可以说这个类根本不是activity…所以你不能调用startActivity。我知道我的类不是activity,但我需要startActivity当按钮被点击时…我应该吗在我使用LoginButton的类中执行此操作?没有其他解决方案?是的,因为它扩展为imagebutton而不是activity…这意味着这个类不是活动类型的类,或者你可以说这个类根本不是活动…所以你不能调用startActivity我知道我的类不是活动,但当按钮单击时我需要startActivity…我应该这样做吗我使用LoginButton的类?没有其他解决办法?