这里很奇怪的问题。我正和它一起转圈！
白天/夜晚模式在我的整个应用中似乎都可以正常工作...但是仅适用于INVISIBLE可绘制对象，在初始加载时不起作用。
我有2个xml可绘制文件夹：
drawable和drawable-night具有匹配的.png文件名
我有两个值文件夹：
values与colors.xml，styles.xml，ic_launcher_background.xml和strings.xml-以及-
values-night与colors.xml和styles.xml
在应用程序中，我使用拨动开关将模式设置为日/夜模式，如下所示。这似乎工作正常。
dayNightMode.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
System.out.println("Not Checked");
InitApplication.getInstance().setIsNightModeEnabled(true, context);
Intent intent = getIntent();
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
finish();
startActivity(intent);
dayNightMode.setText("Night Mode");
} else {
System.out.println("Checked");
InitApplication.getInstance().setIsNightModeEnabled(false, context);
Intent intent = getIntent();
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
finish();
startActivity(intent);
dayNightMode.setText("Day Mode");
}
}
});
上面的代码调用的InitApplication类是：
package com.dmurphy.remotescrumpoker;
import android.app.Application;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.Log;
public class InitApplication extends Application {
public static final String NIGHT_MODE = "NIGHT_MODE";
private boolean isNightModeEnabled = false;
private static InitApplication singleton = null;
public static InitApplication getInstance() {
if(singleton == null)
{
singleton = new InitApplication();
}
return singleton;
}
@Override
public void onCreate() {
super.onCreate();
singleton = this;
Context appContext = this.getApplicationContext();
SharedPreferences sharedPreferences = appContext.getSharedPreferences("com.dmurphy.remotescrumpoker", Context.MODE_PRIVATE);
isNightModeEnabled = sharedPreferences.getBoolean(NIGHT_MODE, true);
Log.i("onCreate1_", String.valueOf(isNightModeEnabled));
}
public boolean isNightModeEnabled(Context context) {
SharedPreferences sharedPreferences = context.getSharedPreferences("com.dmurphy.remotescrumpoker", Context.MODE_PRIVATE);
isNightModeEnabled = sharedPreferences.getBoolean(NIGHT_MODE, true);
Log.i("onCreate11_", String.valueOf(isNightModeEnabled));
return isNightModeEnabled;
}
public void setIsNightModeEnabled(boolean isNightModeEnabled, Context context) {
this.isNightModeEnabled = isNightModeEnabled;
Log.i("onCreate111_", String.valueOf(isNightModeEnabled));
SharedPreferences sharedPreferences = context.getSharedPreferences("com.dmurphy.remotescrumpoker", Context.MODE_PRIVATE);
sharedPreferences.edit().putBoolean(NIGHT_MODE, isNightModeEnabled).apply();
Log.i("onCreate1111_", String.valueOf(isNightModeEnabled));
}
}
我也有一个Activity_Poker活动。一切正常，如果我更改开关，应用程序也会更改。
我也有启动活动Activity_Splash，在onCreate中，我检查了模式：
if (InitApplication.getInstance().isNightModeEnabled(context)) {
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
Log.i(TAG, "onCreate1_" + "Mode Night Yes");
} else {
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
Log.i(TAG, "onCreate1_" + "Mode Night No");
}
setContentView(R.layout.activity__splash);
启动正常。当我关闭应用程序并重新启动时，两种模式的背景色等都是正确的。我一直有3个可绘制对象VISIBLE用于该活动。这些在两种替代模式之间也可以很好地改变。
但是，我有9个可绘制对象，默认情况下不可见。这些在创建时变为可见，但它们在每次加载时始终显示DAY_MODE。
注意：可绘制对象不在错误的文件夹中。正确的颜色在正确的文件夹中。 9个无法工作的.png文件的颜色与3个VISIBLE可绘制对象的颜色匹配，它们正常工作。不会从INVISIBLE文件夹drawables-night填充默认的onCreate。
如果我使用inApp用户菜单重新启动活动，则会使用NIGHT_MODE或DAY_MODE可绘制对象（如果适用）正确地重新创建活动。 但是NIGHT_MODE可绘制对象（对于默认情况下不可见的Fors对象）在启动时不会使用。
预期的结果：在启动时，将不可见的ImageView更改为“可见”，并为drawables填充了DAY_MODE或为drawables-night填充了NIGHT_MODE
实际结果：：在启动时，将不可见的ImageView更改为可见，并为drawables填充DAY_MODE或为drawables填充NIGHT_MODE
Activity_Poker.java
public class Activity_Poker extends AppCompatActivity {
[snip]
Activity passedActivity = Activity_Poker.this;
[snip]
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_poker);
drawerLayout = findViewById(R.id.drawer_layout);
[snip]
final String methodName = "onCreate";
mAuth = FirebaseAuth.getInstance();
String userId = mAuth.getUid();
[snip]
//Setup the UI for the selected game type
int cardType = sharedPreferences.getInt("cardType", 0);
Log.i(TAG, "Selected SharedPref Record: " + cardType);
callSetupUI.setupLocalActive(passedActivity, cardType);
[snip]
}
注意：：上面的cardType从Logcat正确显示== 5。
SetupUI.java
public void setupLocalActive(Activity passedActivity, int cardType) {
ImageView card4 = passedActivity.findViewById(R.id.pokerCard4);
ImageView card4img = passedActivity.findViewById(R.id.pokerCard4img);
ImageView card5 = passedActivity.findViewById(R.id.pokerCard5);
ImageView card5img = passedActivity.findViewById(R.id.pokerCard5img);
ImageView card6 = passedActivity.findViewById(R.id.pokerCard6);
ImageView card6img = passedActivity.findViewById(R.id.pokerCard6img);
ImageView card7 = passedActivity.findViewById(R.id.pokerCard7);
ImageView card7img = passedActivity.findViewById(R.id.pokerCard7img);
ImageView card8 = passedActivity.findViewById(R.id.pokerCard8);
ImageView card8img = passedActivity.findViewById(R.id.pokerCard8img);
ImageView card9 = passedActivity.findViewById(R.id.pokerCard9);
ImageView card9img = passedActivity.findViewById(R.id.pokerCard9img);
ImageView card11 = passedActivity.findViewById(R.id.pokerCard11);
ImageView card11img = passedActivity.findViewById(R.id.pokerCard11img);
TextView card4TextView = passedActivity.findViewById(R.id.textViewPokerCard4);
TextView card5TextView = passedActivity.findViewById(R.id.textViewPokerCard5);
TextView card6TextView = passedActivity.findViewById(R.id.textViewPokerCard6);
TextView card7TextView = passedActivity.findViewById(R.id.textViewPokerCard7);
TextView card8TextView = passedActivity.findViewById(R.id.textViewPokerCard8);
TextView card9TextView = passedActivity.findViewById(R.id.textViewPokerCard9);
TextView card10TextView = passedActivity.findViewById(R.id.textViewPokerCard10);
TextView card11TextView = passedActivity.findViewById(R.id.textViewPokerCard11);
TextView card12TextView = passedActivity.findViewById(R.id.textViewPokerCard12);
TextView card13TextView = passedActivity.findViewById(R.id.textViewPokerCard13);
TextView card14TextView = passedActivity.findViewById(R.id.textViewPokerCard14);
TextView card15TextView = passedActivity.findViewById(R.id.textViewPokerCard15);
Log.i(TAG, "Selected SharedPref Record UI CardType into Switch: " + cardType);
switch (cardType){
case 1:
[snip]
case 2:
[snip]
case 3:
[snip]
case 4:
[snip]
case 5:
Log.i(TAG, "Selected SharedPref Record Setting UI: " + cardType);
card10.setVisibility(card10.INVISIBLE);
card12.setVisibility(card12.INVISIBLE);
card13.setVisibility(card13.INVISIBLE);
card14.setVisibility(card14.INVISIBLE);
card15.setVisibility(card15.INVISIBLE);
card4TextView.setVisibility(card4TextView.INVISIBLE);
card5TextView.setVisibility(card5TextView.INVISIBLE);
card6TextView.setVisibility(card6TextView.INVISIBLE);
card7TextView.setVisibility(card7TextView.INVISIBLE);
card8TextView.setVisibility(card8TextView.INVISIBLE);
card9TextView.setVisibility(card9TextView.INVISIBLE);
card10TextView.setVisibility(card10TextView.INVISIBLE);
card11TextView.setVisibility(card10TextView.INVISIBLE);
card12TextView.setVisibility(card12TextView.INVISIBLE);
card13TextView.setVisibility(card13TextView.INVISIBLE);
card14TextView.setVisibility(card14TextView.INVISIBLE);
card15TextView.setVisibility(card15TextView.INVISIBLE);
card4img.setImageResource(R.drawable.chihuahua);
card5img.setImageResource(R.drawable.dachshund);
card6img.setImageResource(R.drawable.beagle);
card7img.setImageResource(R.drawable.spaniel);
card8img.setImageResource(R.drawable.boxer);
card9img.setImageResource(R.drawable.shepard);
card11img.setImageResource(R.drawable.dane);
card4img.setVisibility(card4img.VISIBLE);
card5img.setVisibility(card5img.VISIBLE);
card6img.setVisibility(card6img.VISIBLE);
card7img.setVisibility(card7img.VISIBLE);
card8img.setVisibility(card8img.VISIBLE);
card9img.setVisibility(card9img.VISIBLE);
card11img.setVisibility(card11img.VISIBLE);
break;
default:
[snip]
break;
}
}
activity_poker.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="260dp">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
tools:layout_editor_absoluteY="8dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="32dp">
[snip]
<ImageView
android:id="@+id/pokerCard5"
android:layout_width="88dp"
android:layout_height="104dp"
android:layout_marginTop="16dp"
android:background="@color/colorPrimary"
android:contentDescription="@string/localCardSelectcontent"
android:onClick="card8clicked"
app:layout_constraintEnd_toStartOf="@+id/pokerCard6"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/pokerCard4"
app:layout_constraintTop_toBottomOf="@+id/pokerCard2" />
<ImageView
android:id="@+id/pokerCard5img"
android:layout_width="72dp"
android:layout_height="88dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:contentDescription="@string/localCardSelectcontent"
android:onClick="localcard5clicked"
android:visibility="invisible"
app:layout_constraintStart_toStartOf="@+id/pokerCard5"
app:layout_constraintTop_toTopOf="@+id/pokerCard5"
app:srcCompat="@drawable/dachshund" />
<TextView
android:id="@+id/textViewPokerCard5"
android:layout_width="88dp"
android:layout_height="104dp"
android:onClick="localcard5clicked"
android:gravity="center"
android:includeFontPadding="false"
android:textColor="@color/colorPrimaryDark"
android:textSize="44sp"
android:textStyle="normal|bold"
app:layout_constraintStart_toStartOf="@+id/pokerCard5"
app:layout_constraintTop_toTopOf="@+id/pokerCard5" />
<ImageView
android:id="@+id/pokerCard4"
android:layout_width="88dp"
android:layout_height="104dp"
android:background="@color/colorPrimary"
android:contentDescription="@string/localCardSelectcontent"
android:onClick="card5clicked"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="@+id/pokerCard5"
app:layout_constraintEnd_toStartOf="@+id/pokerCard5"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent" />
<ImageView
android:id="@+id/pokerCard4img"
android:layout_width="72dp"
android:layout_height="88dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:contentDescription="@string/localCardSelectcontent"
android:onClick="localcard4clicked"
android:visibility="invisible"
app:layout_constraintStart_toStartOf="@+id/pokerCard4"
app:layout_constraintTop_toTopOf="@+id/pokerCard4"
app:srcCompat="@drawable/chihuahua" />
<TextView
android:id="@+id/textViewPokerCard4"
android:layout_width="88dp"
android:layout_height="104dp"
android:onClick="localcard4clicked"
android:gravity="center"
android:includeFontPadding="false"
android:textColor="@color/colorPrimaryDark"
android:textSize="44sp"
android:textStyle="normal|bold"
app:layout_constraintStart_toStartOf="@+id/pokerCard4"
app:layout_constraintTop_toTopOf="@+id/pokerCard4" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
android:onClick="onSwitchChange"
app:headerLayout= "@layout/nav_header_main"
app:menu="@xml/drawer_view" >
</com.google.android.material.navigation.NavigationView>
答案 0 :(得分：0)
这可能不是正确的解决方案，但是我实现了一种解决方法。
在Activity_Splash中，我添加了一个bool来表示它是首次启动。
SharedPreferences sharedPreferences = Activity_Splash.this.getSharedPreferences("com.dmurphy.remotescrumpoker", Context.MODE_PRIVATE);
sharedPreferences.edit().putBoolean("initialStartup", true).apply();
在Activity_Poker中，我检索了bool，如果启用了NIGHT_MODE且'initialStartup'为true，则我重新启动Activity_Poker以重置UI。
boolean initialStartup = sharedPreferences.getBoolean("initialStartup", false);
if (InitApplication.getInstance().isNightModeEnabled(context) && initialStartup) {
callUserMenu.menuAction(TAG, methodName, context, 5, passedActivity); //This triggers my Intent to restart the activity
sharedPreferences.edit().remove("initialStartup").apply();
}
仍然不知道到底是什么原因造成的。