注:急速开发的人,可以直接看第三种实现方式
1:修改theme,重启activity(Google自家在内的很多应用都是采用此种方式实现夜间模式的)
优点:正儿八经的夜间模式,配色看着舒服
缺点:规模较大的应用,需要随theme变化的属性会很多,都需要逐一定义,有点麻烦,另外一个缺点是要使得新theme生效,一般需要restartActivity来切换UI,会导致切换主题时界面闪烁
核心思路:自定义一个颜色属性名 A,A在日间和夜间模式下都有具体的颜色代码,页面布局文件只管引用A,至于是日间还是夜间,由后台主题决定。
附上一二中方法的图
(原图) (第一种实现)(第二种实现)
好,下面来讲讲具体的实现步骤,本环节使用的开发环境是Eclipse demo地址http://www.oschina.net/code/snippet_2702417_55892
1 首先
attrs.xml(声明属性的类型,布局xml中用) reference可以使用系统的资源ID,比如R.color.gray; color可以直接使用#ffffff颜色代码
<attr name="colorValue" format="color" />
<attr name="floatValue" format="float" />
<attr name="integerValue" format="integer" />
<attr name="booleanValue" format="boolean" />
<attr name="dimensionValue" format="dimension" />
<attr name="stringValue" format="string" />
<attr name="referenceValue" format="color|reference" />
<attr name="imageValue" format="reference"/>
<attr name="curVisibility">
<!-- 相当于View的Visiblity -->
<enum name="show" value="0" />
<!-- Not displayed, but taken into account during layout (space is left for it).相当于View的unVisiblity -->
<enum name="inshow" value="1" />
<!-- Completely hidden, as if the view had not been added.相当于View的GONE -->
<enum name="hide" value="2" />
</attr>
colors.xml(调色板,集中管理颜色hex)遵循优秀格式规范,即调色板模式,避免使用btn1,btn2,fontTitle,fontText之类的颜色名。
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="title">#101115</color>
<color name="night_title">#FFFFFF</color>
</resources>
string.xml
<string name="app_name">dayandNight</string>
<string name="hello_world">Hello world!</string>
<string name="action_settings">白模式</string>
<string name="night_action_settings">夜模式</string>
styles.xml(日间、夜间主题)
<resources>
<style name="AppBaseTheme" parent="android:Theme.Light">
<!--
Theme customizations available in newer API levels can go in
res/values-vXX/styles.xml, while customizations related to
backward-compatibility can go here.
-->
</style>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
<!-- All customizations that are NOT specific to a particular API-level can go here. -->
</style>
<style name="DayTheme" parent="AppTheme">
<item name="colorValue">@color/title</item>
<item name="floatValue">0.35</item>
<item name="integerValue">33</item>
<item name="booleanValue">true</item>
<item name="dimensionValue">16dp</item>
<!-- 如果string类型不是填的引用而是直接放一个字符串,在布局文件中使用正常,但代码里获取的就有问题 -->
<item name="stringValue">@string/action_settings</item>
<item name="referenceValue">@drawable/bg</item>
<item name="imageValue">@drawable/day</item>
<item name="curVisibility">show</item>
</style>
<style name="NightTheme" parent="AppTheme">
<item name="colorValue">@color/night_title</item>
<item name="floatValue">1.44</item>
<item name="integerValue">55</item>
<item name="booleanValue">false</item>
<item name="dimensionValue">18sp</item>
<item name="stringValue">@string/night_action_settings</item>
<item name="referenceValue">@drawable/night_bg</item>
<item name="imageValue">@drawable/night</item>
<item name="curVisibility">hide</item>
</style>
</resources>
2activity的使用
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(MyApp.isLightMode()){
this.setTheme(R.style.NightTheme);
}else{
this.setTheme(R.style.DayTheme);
}
setContentView(R.layout.activity_one);
}
public void onClick(View view){
MyApp.setIslightMode(!MyApp.isLightMode());
recreate();
}
xml的布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/referenceValue"
android:orientation="vertical"
android:gravity="center" >
<TextView
android:id="@+id/setting_Color"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:textColor="?attr/colorValue" />
<CheckBox
android:id="@+id/setting_show_answer_switch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="?attr/booleanValue" />
<TextView
android:id="@+id/setting_Title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="pszwzy"
android:textColor="?attr/colorValue"
android:textSize="?attr/dimensionValue" />
<TextView
android:id="@+id/setting_Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="?attr/stringValue" />
<ImageView
android:id="@+id/setting_Image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="?attr/imageValue" />
<View
android:id="@+id/setting_line"
android:layout_width="match_parent"
android:layout_height="1dp"
android:visibility="?attr/curVisibility" />
<Button
android:onClick="onClick"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="模式切换"
android:textColor="?attr/colorValue"
/>
</LinearLayout>
注:遇到放回activity闪屏的问题可以
(1)在BaseActivity中创建下面的方法
public static void updateTheme(Activity activity,isNight)
{
MyApp.setNightMode(isNight);
activity.recreate();
}
2:使用一个带黑色带透明度的View,盖在现有的activity上,效果类似你带上墨镜,看着太阳不刺眼。
优点:不用重启activity,不闪屏;加上透明度过渡动画,模式之间切换非常舒服,解决了1中,白底图片依旧刺眼的问题。;
缺点:配色没变化,就算带上墨镜,白天依旧是白天。
核心思路:使用WindowManager,在当前activity上,通过addView,添加一个黑色带透明度的View。
//第二中方式,只是提供一种思路,逻辑没有去实习
public void onClickT(View view){
LayoutParams mNightViewParam = new LayoutParams(
LayoutParams.TYPE_APPLICATION,
LayoutParams.FLAG_NOT_TOUCHABLE | LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSPARENT);
WindowManager mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
View mNightView = new View(this);
mWindowManager.addView(mNightView, mNightViewParam);
mNightView.setBackgroundResource(R.color.night_mask);
}
3:通过修改Theme来切换夜间模式,不过不会出现闪屏()的情况。
和第一种方式一样需要theme的设置从上到下的代码
<?xml version="1.0" encoding="utf-8"?>
<resources>
<attr name="gray_3_double" format="color" />
<attr name="source_bg" format="reference" />
</resources>
</pre><pre code_snippet_id="1671755" snippet_file_name="blog_20160504_8_4007554" name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android">
<style name="AppTheme_Night" >
<item name="gray_3_double">@color/gray_3_night</item>
<item name="source_bg">@drawable/source_bg_night</item>
</style>
</resources>
<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android">
<style name="AppTheme_Light" >
<item name="gray_3_double">@color/gray_3_light</item>
<item name="source_bg">@drawable/source_bg_light</item>
</style>
</resources>
先看下BaseActivity
public abstract class BaseActivity extends Activity {
protected int skin;
public Context mContext;
SharedPreferences sp;
@Override
protected void onCreate(Bundle savedInstanceState) {
<span style="white-space:pre"> </span>setThemeMode(getSkinTypeValue());
<span style="white-space:pre"> </span>super.onCreate(savedInstanceState);
<span style="white-space:pre"> </span>init();
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public abstract void init();
<span style="white-space:pre"> </span>protected void setThemeMode(SkinType skinType) {
<span style="white-space:pre"> </span> switch (skinType) {
<span style="white-space:pre"> </span> case Light:
<span style="white-space:pre"> </span>setTheme(R.style.AppTheme_Light);
<span style="white-space:pre"> </span> break;
<span style="white-space:pre"> </span> case Night:
<span style="white-space:pre"> </span>setTheme(R.style.AppTheme_Night);
<span style="white-space:pre"> </span> break;
<span style="white-space:pre"> </span> default:
<span style="white-space:pre"> </span>setTheme(R.style.AppTheme_Light);
<span style="white-space:pre"> </span> break;
<span style="white-space:pre"> </span>}
}
//获取用户选取的模式
protected SkinType getSkinTypeValue() {
<span style="white-space:pre"> </span>if (sp == null) {
<span style="white-space:pre"> </span>sp = getSharedPreferences("AppSkinType", Context.MODE_PRIVATE);
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>int i = sp.getInt("AppSkinTypeValue", 0);
<span style="white-space:pre"> </span>switch (i) {
<span style="white-space:pre"> </span> case 0:
<span style="white-space:pre"> </span>return SkinType.Light;
case 1:
<span style="white-space:pre"> </span>return SkinType.Night;
<span style="white-space:pre"> </span> default:
<span style="white-space:pre"> </span> break;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>return SkinType.Light;
}
//保存用户是选取的模式
public void saveSkinValue(int skin) {
<span style="white-space:pre"> </span>if (sp == null) {
<span style="white-space:pre"> </span>sp = getSharedPreferences("AppSkinType", Context.MODE_PRIVATE);
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>Editor editor = sp.edit();
<span style="white-space:pre"> </span>editor.putInt("AppSkinTypeValue", skin);
<span style="white-space:pre"> </span>editor.commit();
}
在看下第一个activity的使用的
public class MainActivity extends BaseActivity {
private CheckBox cbSetting;
private Button btnForward;
private TextView tv_title;
private View llNight;
@Override
public void init() {
setContentView(R.layout.activity_main);
llNight = findViewById(R.id.ll_night);
tv_title = (TextView) findViewById(R.id.tv_title);
btnForward = (Button) findViewById(R.id.forward);
cbSetting = (CheckBox) findViewById(R.id.cb_setting);
cbSetting.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
// 夜间模式
saveSkinValue(1);
setTheme(R.style.AppTheme_Night);//防止getTheme()取出来的值是创建时候得值
initView();
} else {
// 白天模式
saveSkinValue(0);
setTheme(R.style.AppTheme_Light);//防止getTheme()取出来的值是创建时候得值
initView();
}
}
});
btnForward.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,SecondActivity.class);
startActivity(intent);
}
});
}
//改变模式后手动修改UI,不然出现闪屏
private void initView(){
<span style="color:#ff6666;">TypedValue typedValue = new TypedValue();
Theme theme = getTheme();
theme.resolveAttribute(R.attr.gray_3_double, typedValue, true);
btnForward.setTextColor(getResources().getColor(typedValue.resourceId));
tv_title.setTextColor(getResources().getColor(typedValue.resourceId));
theme.resolveAttribute(R.attr.source_bg, typedValue, true);
llNight.setBackgroundDrawable(getResources().getDrawable(typedValue.resourceId));</span>
}
}
大体就是这样实现,附上demo链接 http://www.oschina.net/code/snippet_2702417_55886
优点:
bug少,用户体验好
缺点:
UI控件多的时候,改起来工作量不小。代码量很大
4 通过模式库changesKin
http://www.codeceo.com/article/android-changeskin-usage.html
注:这里提到的都是资源内嵌在Apk中的方案,像qq通过下载方式实现夜间的方式可以去百度一下。
参考: http://m.oschina.net/blog/668384