Android应用动态修改主题的方法示例

1.使用API设置主题

如下所示，在Activity中使用setTheme

setTheme(R.style.MyTheme1);

2.调用API的时机

需要在super.onCreate(savedInstanceState)之前调用setTheme

3.重新设置主题

要重新设置主题，则需要结束Activity，重新启动才可以

public class MainActivity extends Activity {
 private TextView tv;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
   if(MyApplication.SHOW_THEME_FLAG == MyApplication.SHOW_1_THEME_FLAG){
     setTheme(R.style.MyTheme2);
   }else if(MyApplication.SHOW_THEME_FLAG == MyApplication.SHOW_2_THEME_FLAG){
     setTheme(R.style.MyTheme1);
   }
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   tv = findViewById(R.id.tv);
   getActionBar().show();
   getActionBar().setTitle("ActionBar Title");
   tv.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View view) {
       if(MyApplication.SHOW_THEME_FLAG == MyApplication.SHOW_1_THEME_FLAG){
         MyApplication.SHOW_THEME_FLAG = MyApplication.SHOW_2_THEME_FLAG;
       }else if(MyApplication.SHOW_THEME_FLAG == MyApplication.SHOW_2_THEME_FLAG){
         MyApplication.SHOW_THEME_FLAG = MyApplication.SHOW_1_THEME_FLAG;
       }
       Intent mIntent = getIntent();
       finish();
       overridePendingTransition(0,0);
       startActivity(mIntent);
     }
   });
 }
}

4.常用主题style设置

 <style name="MyTheme1" parent="@android:style/Theme.Material">
   <!-- 状态栏 -->
   <item name="android:colorPrimaryDark">#f00</item>
   <!-- ActionBar颜色 -->
   <item name="android:colorPrimary">#ff0</item>
   <!-- 界面背景色 -->
   <item name="android:windowBackground">@color/windowBackgroundColor1</item>
   <!-- 导航栏颜色 -->
   <item name="android:navigationBarColor">#0000ff</item>
 </style>
 <style name="MyTheme2" parent="@android:style/Theme.Material">
   <!-- 状态栏 -->
   <item name="android:colorPrimaryDark">#757575</item>
   <!-- ActionBar颜色 -->
   <item name="android:colorPrimary">#03A9F4</item>
   <!-- 界面背景色 -->
   <item name="android:windowBackground">@color/windowBackgroundColor2</item>
   <!-- 导航栏颜色 -->
   <item name="android:navigationBarColor">#1976D2</item>
 </style>

来源：https://blog.csdn.net/zxlworking1/article/details/79026956