以编程方式更改活动的主题， [英] Change Activity's theme programmatically

问题描述

在特定的情况下，我需要从我的活动中删除对话框主题，但它似乎并不奏效。下面是一个例子

In particular cases I need to remove dialog theme from my activity but it doesn't seem to be working. Here's an example

第一项活动：

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    startActivity(new Intent(MainActivity.this, SecondActivity.class));
}

第二项活动：

Second activity:

public void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setTheme(android.R.style.Theme);
    setContentView(R.layout.activity_second);
}

清单节选：

 <activity android:name="SecondActivity" android:theme="@android:style/Theme.Dialog"></activity>

当我运行它的对话框里还是主题。

When I run it's still dialog themed.

API10

感谢。

推荐答案

作为<一个href="http://developer.android.com/reference/android/content/Context.html#setTheme%28int%29">docs说你有什么看法输出之前调用setTheme。看来，super.onCreate（）参与视图处理。

As docs say you have to call setTheme before any view output. It seems that super.onCreate() takes part in view processing.

所以，主题之间切换动态，你只需要调用setTheme super.onCreate之前是这样的：

So, to switch between themes dynamically you simply need to call setTheme before super.onCreate like this:

public void onCreate(Bundle savedInstanceState) {
    setTheme(android.R.style.Theme);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);
}

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