Android 带有开关按钮的SharedReferences
我有一个项目,我想保存SharedReferences上开关按钮的状态。但它不起作用。切换活动或关闭应用程序并重新打开时,切换按钮始终关闭。我的代码怎么了?它在第一次测试中工作,当我再次反驳应用程序错误时Android 带有开关按钮的SharedReferences,android,switch-statement,sharedpreferences,Android,Switch Statement,Sharedpreferences,我有一个项目,我想保存SharedReferences上开关按钮的状态。但它不起作用。切换活动或关闭应用程序并重新打开时,切换按钮始终关闭。我的代码怎么了?它在第一次测试中工作,当我再次反驳应用程序错误时 public class huongdan extends Activity implements CompoundButton.OnCheckedChangeListener{ Switch vt,mbf,vnp,vnm,gmb; TextView vtmb; @Override pro
public class huongdan extends Activity implements CompoundButton.OnCheckedChangeListener{
Switch vt,mbf,vnp,vnm,gmb;
TextView vtmb;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_huongdan);
// hien thi man hinh float
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int width = displayMetrics.widthPixels;
int height = displayMetrics.heightPixels;
getWindow().setLayout((int) (width*1),(int) (height*0.80));
// endhien thi man hinh float
//switch viettel
vt = (Switch) findViewById(R.id.switchvt);
vt.setChecked(getFromSP("sw1"));
vt.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked == true){
OneSignal.sendTag("viettel", "viettel");
}
else
OneSignal.deleteTag("viettel");
}
});
//switch mobi
mbf = (Switch) findViewById(R.id.switchmbf);
mbf.setChecked(getFromSP("sw2"));
mbf.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked == true){
OneSignal.sendTag("mobifone", "mobifone");
}
else
OneSignal.deleteTag("mobifone");
}
});
//switch vina
vnp = (Switch) findViewById(R.id.switchvnp);
vnp.setChecked(getFromSP("sw3"));
vnp.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked == true){
OneSignal.sendTag("vinaphone", "vinaphone");
}
else
OneSignal.deleteTag("vinaphone");
}
});
//switch vietnammobile
vnm = (Switch) findViewById(R.id.switchvnm);
vnm.setChecked(getFromSP("sw4"));
vnm.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked == true){
OneSignal.sendTag("vietnammobile", "vietnammobile");
}
else
OneSignal.deleteTag("vietnammobile");
}
});
//switch gmobile
gmb = (Switch) findViewById(R.id.switchgmb);
gmb.setChecked(getFromSP("sw5"));
gmb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked == true){
OneSignal.sendTag("gmobile", "gmobile");
}
else
OneSignal.deleteTag("gmobile");
}
});
}
private boolean getFromSP(String key){
SharedPreferences preferences = getApplicationContext().getSharedPreferences("com.sopu89.napthenoti", android.content.Context.MODE_PRIVATE);
return preferences.getBoolean(key, false);
}
private void saveInSp(String key,boolean value){
SharedPreferences preferences = getApplicationContext().getSharedPreferences("com.sopu89.napthenoti", android.content.Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean(key, value);
editor.commit();
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
switch(buttonView.getId()){
case R.id.switchvt:
saveInSp("sw1",isChecked);
break;
case R.id.switchmbf:
saveInSp("sw2",isChecked);
break;
case R.id.switchvnp:
saveInSp("sw3",isChecked);
break;
case R.id.switchvnm:
saveInSp("sw4",isChecked);
break;
case R.id.switchgmb:
saveInSp("sw5",isChecked);
break;
}
}
}您需要从共享首选项中检索值,然后在
onCreate
方法中设置按钮状态
SharedPreferences preferences = getPreferences(MODE_PRIVATE);
boolean tgpref = preferences.getBoolean("tgpref", true); //default is true
if (tgpref = true) //if (tgpref) may be enough, not sure
{
tg.setChecked(true);
}
else
{
tg.setChecked(false);
}
最终将永远不会调用onCheckedChanged方法,因此不会保存您的状态 原因是,您正在为每个交换机声明一个新的侦听器。 召唤 在switch one的侦听器中,或将您的类设置为交换机的侦听器,并在其中处理所有更改:
switch.setOnCheckedChangedListener(this);
谢谢@Katharina Sicki将代码更改为“switch.setOnCheckedChangedListener(此);”这是可行的,但当用户改变开关按钮的状态时,我希望每个开关上的settag和deletetettag与我的代码相同,我可以把settag和deletetettag代码放在哪里?太好了!对不起,昨天没有给你答复,我没有时间检查我的电脑
switch.setOnCheckedChangedListener(this);