#35464e
#212a2f
#212a2f
#616161
#212a2f
@android:color/holo_blue_dark
strings.xml in values
DayNight
day mode
strings.xml in values-night
DayNight
night mode
Add click and function actions in MainActivity.java
public class MainActivity extends AppCompatActivity {
private Button mDayNightChange;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDayNightChange = (Button) findViewById(R.id.day_night_change);
mDayNightChange.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int mode = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
if (mode == Configuration.UI_MODE_NIGHT_YES) {
getDelegate().setLocalNightMode(AppCompatDelegate.MODE_NIGHT_NO);
} else if (mode == Configuration.UI_MODE_NIGHT_NO) {
getDelegate().setLocalNightMode(AppCompatDelegate.MODE_NIGHT_YES);
}
recreate();
}
});
}
}
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.AppCompatDelegate;
You may encounter the problem of reporting red or not being able to find it, you can use the code below to replace it
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.app.AppCompatDelegate;
in many places
Add MyApplication.java, set the function type
import android.app.Application;
import androidx.appcompat.app.AppCompatDelegate;
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
}
}
There are four types of Mode here to choose from:
MODE_NIGHT_NO: Use light theme, do not use night mode;
MODE_NIGHT_YES: use dark (dark) theme, use night mode;
MODE_NIGHT_AUTO: Automatically switch between light and dark themes according to the current time;
MODE_NIGHT_FOLLOW_SYSTEM (default option): set to follow the system, usually MODE_NIGHT_NO
end
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