[英]How can i implement dark and light mode in a java swing gui application?
[英]How can i implement dark mode on the first activity while the application launched for the first time
我在第二個活動中使用 SwitchPreference 實現暗模式,在第一個活動中只有一個按鈕將我帶到第二個活動(設置)問題是當應用程序被銷毀並且我再次啟動它時暗模式直到第二個活動啟動才實現。
//First Activity
public class MainActivity extends AppCompatActivity {
Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences sharedPreferences =
PreferenceManager.getDefaultSharedPreferences( this/* Activity context */);
Boolean theme = sharedPreferences.getBoolean("darkMode", false);
button=findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent2=new Intent(MainActivity.this,Settings.class);
startActivity(intent2);
}
});
}
}
我知道我應該使用 sharedpreferences 但我不知道如何設置它
//Second Activity
public class MySettingsFragment extends PreferenceFragmentCompat {
@Override
public void onCreatePreferences(@Nullable Bundle savedInstanceState, @Nullable String rootKey) {
setPreferencesFromResource(R.xml.preferences,rootKey);
SwitchPreference switchPreference=findPreference("darkMode");
if (switchPreference.isChecked()){
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
}else {
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
}
}
}
您可以通過此 function 更改暗模式或亮模式。
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.HERE_YOUR_MODE);
您可以像這樣訪問模式:
AppCompatDelegate.MODE_NIGHT_YES // for dark mode
AppCompatDelegate.MODE_NIGHT_NO // for light mode
AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM // for set as your devices theme
AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM // when you are in battery saver
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
Boolean theme = sharedPreferences.getBoolean("darkMode", false);
if (theme){
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES); // implement here.
}else{
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO); // implement here.
}
}
那么根據你的代碼,你離取得結果只有一步之遙
您只需要在每個活動的onCreate
方法中使用以下代碼
if (isDarkMode){ // isDarkMode is boolean which we can get from preference
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
}else {
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
}
```
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