我知道有一种方法可以在按钮点击时更改应用默认主题。 Blackmart开发人员已经做到了。我已经在Google上搜索了1000页,但我发现这个(不能正常工作)
getApplication().setTheme(Theme.Holo)
由于我已经在res / values / styles.xml中创建了一个新样式,还有其他方法可以动态更改它吗?甚至重启应用程序?
答案 0 :(得分:64)
关注博客可以解决您的问题:
http://mrbool.com/how-to-change-the-layout-theme-of-an-android-application/25837
复制博客代码以供快速参考:
假设您已在XML文件R.style.FirstTheme
,R.style.SecondTheme
和R.style.ThirdTheme
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class ChangeThemeActivity extends Activity implements OnClickListener
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Utils.onActivityCreateSetTheme(this);
setContentView(R.layout.main);
findViewById(R.id.button1).setOnClickListener(this);
findViewById(R.id.button2).setOnClickListener(this);
findViewById(R.id.button3).setOnClickListener(this);
}
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
switch (v.getId())
{
case R.id.button1:
Utils.changeToTheme(this, Utils.THEME_DEFAULT);
break;
case R.id.button2:
Utils.changeToTheme(this, Utils.THEME_WHITE);
break;
case R.id.button3:
Utils.changeToTheme(this, Utils.THEME_BLUE);
break;
}
}
}
让我们在“Utils”文件中编写以下代码:
import android.app.Activity;
import android.content.Intent;
public class Utils
{
private static int sTheme;
public final static int THEME_DEFAULT = 0;
public final static int THEME_WHITE = 1;
public final static int THEME_BLUE = 2;
/**
* Set the theme of the Activity, and restart it by creating a new Activity of the same type.
*/
public static void changeToTheme(Activity activity, int theme)
{
sTheme = theme;
activity.finish();
activity.startActivity(new Intent(activity, activity.getClass()));
}
/** Set the theme of the activity, according to the configuration. */
public static void onActivityCreateSetTheme(Activity activity)
{
switch (sTheme)
{
default:
case THEME_DEFAULT:
activity.setTheme(R.style.FirstTheme);
break;
case THEME_WHITE:
activity.setTheme(R.style.SecondTheme);
break;
case THEME_BLUE:
activity.setTheme(R.style.Thirdheme);
break;
}
}
}
希望它有所帮助...
编辑1:
以下是AlertDialog
不采用自定义主题的原因:
Builder.create()中的实现是:
public AlertDialog create() {
final AlertDialog dialog = new AlertDialog(P.mContext);
P.apply(dialog.mAlert);
[...]
}
调用AlertDialog的“not-theme-aware”构造函数,如下所示:
protected AlertDialog(Context context) {
this(context, com.android.internal.R.style.Theme_Dialog_Alert);
}
AlertDialog中有第二个用于更改主题的构造函数:
protected AlertDialog(Context context, int theme) {
super(context, theme);
[...]
}
Builder只是不打电话。
查看以下帖子以获取更多相关修复程序..
How to change theme for AlertDialog
以下是投票最多的答案:
new AlertDialog.Builder(
new ContextThemeWrapper(context, android.R.style.Theme_Dialog))