团队冲刺第三天

今天进行了夜间模式的学习，出现的问题是：目前只能改按钮的主题，无法更改所有页面的主题。

<androidx.appcompat.widget.Toolbar
android:id="@+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
app:titleTextColor="?attr/titleColor"
app:title="设置"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:layout_margin="20dp">
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="vertical">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="黑夜模式"
            android:textColor="?attr/tvMainColor"
            android:textSize="20dp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/pref_night_summary"
            android:textColor="?attr/tvSubColor"
            android:textSize="16dp" />
    </LinearLayout>
    <Switch
        android:id="@+id/nightMode"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="10dp"
        android:clickable="true"
        android:gravity="center"
        android:switchMinWidth="50dp"
        />
</LinearLayout>

<View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:foreground="@color/greyC"
    />

package com.xrj.night;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.widget.CompoundButton;
import android.widget.Switch;

import androidx.annotation.RequiresApi;
import androidx.appcompat.widget.Toolbar;

public class UserSettingsActivity extends BaseActivity {

private Switch nightMode;
private SharedPreferences sharedPreferences;
private Boolean night_change;

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.preference_layout);

    sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
    Intent intent = getIntent();
    /*
    if(intent.getExtras() != null) night_change = intent.getBooleanExtra("night_change", false);
    else night_change = false;

     */
    initView();

    Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
    setSupportActionBar(myToolbar);
    getSupportActionBar().setHomeButtonEnabled(true);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    if(isNightMode()) myToolbar.setNavigationIcon(getDrawable(R.drawable.ic_settings_black_24dp));
    else myToolbar.setNavigationIcon(getDrawable(R.drawable.ic_settings_white_24dp));
}

public void initView(){
    nightMode = findViewById(R.id.nightMode);
    nightMode.setChecked(sharedPreferences.getBoolean("nightMode", false));
    nightMode.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            setNightModePref(isChecked);
            setSelfNightMode();

        }
    });
}

private void setNightModePref(boolean night){
    //通过nightMode switch修改pref中的nightMode
    sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putBoolean("nightMode", night);
    editor.commit();
}

private void setSelfNightMode(){
    //重新赋值并重启本activity

    super.setNightMode();
    Intent intent = new Intent(this, UserSettingsActivity.class);
    //intent.putExtra("night_change", !night_change); //重启一次，正负颠倒。最终为正值时重启MainActivity。

    startActivity(intent);
    finish();
}

}