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>

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