我有三个带有setOnChangeListener的开关。前两个工作正常。但是由于某些原因,第三个是什么也不做。我读了50次代码,但找不到错误。它应该将一个int保存到SharedPreferences并显示Toast。调试器表明,他进入了案例但不执行它。执行此操作后,MainActivity应该加载保存的值并更改布局。但是代码甚至没有保存。当我重新启动SettingsTheme Activity时,应该加载开关的状态,并且该开关的状态适用于前两个,而不适用于称为行的Swtich。
如果您能提供帮助,那就太好了!
我也尝试将第3个侦听器的处理内容放到第二个侦听器中,但它不起作用。试图删除onChangeListener中的保存内容并进行烤面包,尝试删除MainActivity中的variabels内容,但没有任何效果。
public class SettingsTheme extends AppCompatActivity {
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_theme);
setTitle("Themen");
final Switch darkmode=findViewById(R.id.darkmode);
final Switch auto_darkmode=findViewById(R.id.auto_darkmode);
final Switch rows=findViewById(R.id.modul_rows);
if(variables.LoadInt("dark_mode")==1){darkmode.setChecked(true);}
if(variables.LoadInt("dark_mode")==2){
auto_darkmode.setChecked(true);
darkmode.setBackgroundResource(R.color.light_grey);
darkmode.setClickable(false);
darkmode.setVisibility(View.GONE);}
if(variables.LoadInt("rows")==3){rows.setChecked(true);}
darkmode.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked==true){
variables.SaveInt("dark_mode",1);
}
else{
variables.SaveInt("dark_mode",0);
}
}
});
auto_darkmode.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked==true){
variables.SaveInt("dark_mode",2);
darkmode.setBackgroundResource(R.color.light_grey);
darkmode.setClickable(false);
darkmode.setChecked(false);
darkmode.setVisibility(View.GONE);
}
else{
variables.SaveInt("dark_mode",0);
darkmode.setClickable(true);
darkmode.setBackgroundResource(0);
darkmode.setVisibility(View.VISIBLE);
}
}
});
rows.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked==true){
variables.SaveInt("rows",3);
Toast.makeText(SettingsTheme.this, "3x7 Layout gewählt",Toast.LENGTH_SHORT);
}
else{
variables.SaveInt("rows",2);
Toast.makeText(SettingsTheme.this,"2x3 Layout,Toast.LENGTH_SHORT); }
}
});}
public class variables {
public static SharedPreferences Var;
public static int LoadInt(String s){
Var=MainActivity.PublicContext.getSharedPreferences(s, Context.MODE_PRIVATE);
return Var.getInt(s,0);
}
public static void SaveInt(String s, int i){
SharedPreferences.Editor editor=Var.edit();
editor.putInt(s,i).apply();
}
public static String LoadString(String s){
Var=MainActivity.PublicContext.getSharedPreferences(s, Context.MODE_PRIVATE);
return Var.getString(s,"");
}
public static void SaveString(String s, String sts){
SharedPreferences.Editor editor=Var.edit();
editor.putString(s,sts).apply();
}
}
public class MainActivity extends AppCompatActivity {
public View root;
public static Context PublicContext=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(PublicContext==null)PublicContext=getApplicationContext();
View view1=getLayoutInflater().inflate(R.layout.activity_main_row2,null);
View view2= getLayoutInflater().inflate(R.layout.activity_main_row3,null);
if(variables.LoadInt("rows")==3){setContentView(view2);}
else{setContentView(view1);}
}
}
答案 0 :(得分:2)
您的Toast
缺少.show()
。因此,即使执行代码,也不会显示任何敬酒。
答案 1 :(得分:0)
我通过更改variables.java中的代码解决了这个问题。我使用了TinyDB类(https://github.com/kcochibili/TinyDB--Android-Shared-Preferences-Turbo/blob/master/TinyDB.java):
public class variables {
public static TinyDB Var=new TinyDB(MainActivity.PublicContext);
public static int LoadInt(String s){
return Var.getInt(s);
}
public static void SaveInt(String s, int i){
Var.putInt(s,i);
}
public static String LoadString(String s){
return Var.getString(s);
}
public static void SaveString(String s, String sts){
Var.putString(s,sts);
}
}