Android:如何实现更换主题

关键代码:setTheme(int ID);

注意点:

1.设置主题必须要在setContentView() 之前调用,所以需要写个Intent去重新开启Activity.

2.为了切换主题保证流畅性,需要去处动画效果.调用 overridePendingTransition(0,0);这个方法.具体实现看下面的代码.

public class MyActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
            int themeID=getIntent().getIntExtra("themeID",-1);
            if (themeID!=-1){
                setTheme(themeID);
            }

        setContentView(R.layout.mainlayout);

    }

    public void changeRed(View View) {
        finish();
        overridePendingTransition(0,0);
        Intent intent = new Intent();
        intent.setClass(getApplicationContext(), MyActivity.class);
        intent.putExtra("themeID",R.style.MyTheme);
        startActivity(intent);
    }

}