java如何检索共享首选项的值以检查条件
这里我有三个按钮是否可能对于三个按钮,我在按钮点击时更改了颜色,并将点击按钮的值存储在共享首选项中,以便在我返回按钮时保持颜色
@覆盖 公共视图getView(最终整数位置、视图转换视图、视图组父视图){
if (convertView == null)
convertView = mInflater.inflate(R.layout.invitation, null);
eventNameTxtV = (TextView) convertView.findViewById(R.id.invitation_title);
eventPlaceTxtV = (TextView) convertView.findViewById(R.id.invitation_place);
eventNameTxtV.setText(eventMOs.get(position).getText());
eventPlaceTxtV.setText(eventMOs.get(position).getPlace());
convertView.setTag(position);
View v = convertView.findViewById(R.id.invitation_single);
final Button yesBtn = (Button) convertView.findViewById(R.id.yesbutton);
final Button noBtn = (Button) convertView.findViewById(R.id.nobutton);
final Button maybeBtn = (Button) convertView.findViewById(R.id.buttonmaybe);
final LinearLayout eventLayout = (LinearLayout) convertView.findViewById(R.id.invitation_single);
final LinearLayout responseLayout = (LinearLayout) convertView.findViewById(R.id.hidden);
//Based on the user click, response will be stored
yesBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// highlight the button when clicked
yesBtn.setBackgroundColor(Color.YELLOW);
noBtn.setBackgroundColor(Color.BLUE);
maybeBtn.setBackgroundColor(Color.BLUE);
responseLayout.setVisibility(View.GONE);
//If user clicks yes button in invitation response layout,response would be stored as 1 for event user
final int response = 1;
final long eventId = eventMOs.get(position).getEventId();
userMO.setIsAttending(response);
//create shared preferences here
prefs =getActivity().getSharedPreferences("mypref", Context.MODE_PRIVATE);
SharedPreferences.Editor editor =prefs.edit();
editor.putString("buttonClicked","true");
editor.commit();
/*SharedPreferences sharedpreferences = getActivity().getSharedPreferences("PREFERENCE", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putInt("clicked_btn", 1);
editor.commit();*/
new AsyncTask<Void, Void, String>() {
protected String doInBackground(Void... arg0) {
return userDelegate.updateEventUserRelationShipMapping(userMO, eventId);
}
}.execute(null, null, null);
}
});
noBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
yesBtn.setBackgroundColor(Color.BLUE);
noBtn.setBackgroundColor(Color.YELLOW);
maybeBtn.setBackgroundColor(Color.BLUE);
responseLayout.setVisibility(View.GONE);
//If user clicks no button in invitation response layout,response would be stored as 0 for event user
final int response = 0;
final long eventId = eventMOs.get(position).getEventId();
userMO.setIsAttending(response);
SharedPreferences sharedpreferences = getActivity().getSharedPreferences("PREFERENCE", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putInt("clicked_btn", 0);
editor.commit();
new AsyncTask<Void, Void, String>() {
protected String doInBackground(Void... arg0) {
return userDelegate.updateEventUserRelationShipMapping(userMO, eventId);
}
}.execute(null, null, null);
}
});
maybeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
yesBtn.setBackgroundColor(Color.BLUE);
noBtn.setBackgroundColor(Color.BLUE);
maybeBtn.setBackgroundColor(Color.YELLOW);
responseLayout.setVisibility(View.GONE);
//If user clicks maybe button in invitation response layout,response would be stored as for event user
final int response = 2;
userMO.setIsAttending(response);
final long eventId = eventMOs.get(position).getEventId();
SharedPreferences sharedpreferences = getActivity().getSharedPreferences("PREFERENCE", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putInt("clicked_btn",2);
editor.commit();
new AsyncTask<Void, Void, String>() {
protected String doInBackground(Void... arg0) {
return userDelegate.updateEventUserRelationShipMapping(userMO, eventId);
}
}.execute(null, null, null);
}
});
在这里,如果我选择了任何一个按钮,每当我返回应用程序时,我都必须按住按钮的颜色变化。那么如何使用和检索共享的首选项值呢
这是我单击事件时一起显示“是”“否”“可能”按钮的代码
eventLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.invitation_single:
responseLayout.setVisibility(View.VISIBLE);
break;
}
}
});
# 1 楼答案
您可以使用此更改按钮的颜色
在onCreate中:
现在检查存储在首选项中的布尔值:
现在,在按钮的onClick方法中:
# 2 楼答案
SharedPreferences
使您能够存储不同类型的数据,例如boolean
或int
要完成任务,可以将每个按钮的颜色存储在
SharedPreferences
;比如:请记住,在检索该颜色时,必须使用以下方法进行解析: