Android应用动态修改主题的方法示例

setTheme(R.style.MyTheme1);

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);
      }
    });
  }
}