blocks|key|1457951|text|我这样做了我的主题切换器：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1457952|Intent+intent+=+getIntent();
finish();
startActivity(intent);|code-block|syntax|javascript|1457953|基本上，我首先调用finish()，并且我使用的目的与本活动开始时的目的完全相同。这似乎起作用了吗？|offset|length|style|CODE|1457954|更新:正如下面的Ralf所指出的，Activity.recreate()是API11及以后版本的发展方向。如果是在API11%2B环境中，这是更好的选择。如果您使用的是API10或更低版本，您仍然可以检查当前版本并调用上面的代码片段。(请不要忘记给Ralf的答案加分！)|1457955|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/app/Activity.html#recreate%2528%2529^0|0|0|9|8|0|H|J|H|J|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|11|8|@$I|12|J|13|K|L]]|9|@$I|14|J|15|1|16]]|A|$]]|$1|O|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

I did my theme switcher like this:

<pre><code>Intent intent = getIntent();
finish();
startActivity(intent);
</code></pre>

Basically, I'm calling <code>finish()</code> first, and I'm using the exact same intent this activity was started with. That seems to do the trick?

UPDATE: As pointed out by Ralf below, <a href="http://developer.android.com/reference/android/app/Activity.html#recreate%28%29" rel="noreferrer"><code>Activity.recreate()</code></a> is the way to go in API 11 and beyond. This is preferable if you're in an API11+ environment. You can still check the current version and call the code snippet above if you're in API 10 or below. (Please don't forget to upvote Ralf's answer!)

blocks|key|1243342|text|从接口级别11+(蜂巢)开始，可以调用activity的recreate()方法(多亏了this+answer)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1243343|recreate()方法的作用类似于配置更改，因此如果适用，还会调用onSaveInstanceState()和onRestoreInstanceState()方法。|1243344|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/app/Activity.html#recreate%2528%2529|1|https://stackoverflow.com/a/7858127/214837^0|S|A|0|18|4|1|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

Since API level 11 (Honeycomb), you can call the <a href="http://developer.android.com/reference/android/app/Activity.html#recreate%28%29" rel="noreferrer">recreate()</a> method of the activity (thanks to <a href="https://stackoverflow.com/a/7858127/214837">this</a> answer).

The recreate() method acts just like a configuration change, so your onSaveInstanceState() and onRestoreInstanceState() methods are also called, if applicable.

blocks|key|1457897|text|在SDK+11之前，这样做的方法如下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1457898|public+void+reload()+{
++++Intent+intent+=+getIntent();
++++overridePendingTransition(0,+0);
++++intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
++++finish();
++++overridePendingTransition(0,+0);
++++startActivity(intent);
}|code-block|syntax|javascript|1457899|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Before SDK 11, a way to do this is like so:

<pre><code>public void reload() {
 Intent intent = getIntent();
 overridePendingTransition(0, 0);
 intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
 finish();
 overridePendingTransition(0, 0);
 startActivity(intent);
}
</code></pre>

blocks|key|1243412|text|结合Ralf和Ben的答案(包括在评论中所做的更改)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1243413|if+(Build.VERSION.SDK_INT+>=+11)+{
++++recreate();
}+else+{
++++Intent+intent+=+getIntent();
++++intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
++++finish();
++++overridePendingTransition(0,+0);

++++startActivity(intent);
++++overridePendingTransition(0,+0);
}|code-block|syntax|javascript|1243414|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Just to combine Ralf and Ben's answers (including changes made in comments):

<pre><code>if (Build.VERSION.SDK_INT &gt;= 11) {
 recreate();
} else {
 Intent intent = getIntent();
 intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
 finish();
 overridePendingTransition(0, 0);

 startActivity(intent);
 overridePendingTransition(0, 0);
}
</code></pre>

blocks|key|1243749|text|我使用这段代码，这样我仍然可以支持较老的安卓版本，并在较新的安卓版本上使用recreate()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1243750|代码：|1243751|public+static+void+restartActivity(Activity+activity){
++++if+(Build.VERSION.SDK_INT+>=+11)+{
++++++++activity.recreate();
++++}+else+{
++++++++activity.finish();
++++++++activity.startActivity(activity.getIntent());
++++}
}|code-block|syntax|javascript|1243752|示例：|1243753|import+android.app.Activity;
import+android.os.Build;
import+android.os.Bundle;
import+android.support.v7.app.AppCompatActivity;
import+android.view.View;
import+android.widget.Button;

public+class+MainActivity+extends+AppCompatActivity+{
++++private+Activity+mActivity;

++++@Override
++++protected+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);
++++++++setContentView(R.layout.activity_main);

++++++++mActivity+=+MainActivity.this;

++++++++Button+button+=+(Button)+findViewById(R.id.restart_button);
++++++++button.setOnClickListener(new+View.OnClickListener()+{
++++++++++++@Override
++++++++++++public+void+onClick(View+v)+{
++++++++++++++++restartActivity(mActivity);
++++++++++++}
++++++++});
++++}

++++public+static+void+restartActivity(Activity+activity)+{
++++++++if+(Build.VERSION.SDK_INT+>=+11)+{
++++++++++++activity.recreate();
++++++++}+else+{
++++++++++++activity.finish();
++++++++++++activity.startActivity(activity.getIntent());
++++++++}
++++}
}|1243754|entityMap^0|11|A|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|X|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|Y|8|@]|D|@]|E|$K|L]]|$1|Q|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|R|$]]

I used this code so I still could support older Android versions and use <code>recreate()</code> on newer Android versions.

Code:

<pre><code>public static void restartActivity(Activity activity){
 if (Build.VERSION.SDK_INT &gt;= 11) {
 activity.recreate();
 } else {
 activity.finish();
 activity.startActivity(activity.getIntent());
 }
}
</code></pre>

Sample:

<pre><code>import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
 private Activity mActivity;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 mActivity = MainActivity.this;

 Button button = (Button) findViewById(R.id.restart_button);
 button.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 restartActivity(mActivity);
 }
 });
 }

 public static void restartActivity(Activity activity) {
 if (Build.VERSION.SDK_INT &gt;= 11) {
 activity.recreate();
 } else {
 activity.finish();
 activity.startActivity(activity.getIntent());
 }
 }
}
</code></pre>

blocks|key|1243787|text|到目前为止，这是重新启动当前活动的最简单方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1243788|finish();
startActivity(getIntent());|code-block|syntax|javascript|1243789|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is by far the easiest way to restart the current activity:

<pre><code>finish();
startActivity(getIntent());
</code></pre>

blocks|key|1243627|text|这个解决方案对我很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1243628|首先完成该活动，然后重新开始。|1243629|示例代码：|1243630|public+void+restartActivity(){
++++Intent+mIntent+=+getIntent();
++++finish();
++++startActivity(mIntent);
}|code-block|syntax|javascript|1243631|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

This solution worked for me.

First finish the activity and then start it again.

Sample code:

<pre><code>public void restartActivity(){
 Intent mIntent = getIntent();
 finish();
 startActivity(mIntent);
}
</code></pre>

blocks|key|1243290|text|调用此方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1243291|private+void+restartFirstActivity()
+{
+Intent+i+=+getApplicationContext().getPackageManager()
+.getLaunchIntentForPackage(getApplicationContext().getPackageName()+);

+i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP+%7C+Intent.FLAG_ACTIVITY_NEW_TASK+);
+startActivity(i);
+}|code-block|syntax|javascript|1243292|谢谢,|1243293|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Call this method

<pre><code>private void restartFirstActivity()
 {
 Intent i = getApplicationContext().getPackageManager()
 .getLaunchIntentForPackage(getApplicationContext().getPackageName() );

 i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK );
 startActivity(i);
 }
</code></pre>

Thanks,

blocks|key|1458128|text|尽管这个问题已经被回答了很多次。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1458129|如果从片段重新启动活动，我会这样做：|1458130|new+Handler().post(new+Runnable()+{

+++++++++@Override
+++++++++public+void+run()
+++++++++{
++++++++++++Intent+intent+=+getActivity().getIntent();
++++++++++++intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP+%7C+Intent.FLAG_ACTIVITY_NEW_TASK+%7C+Intent.FLAG_ACTIVITY_NO_ANIMATION);
++++++++++++getActivity().overridePendingTransition(0,+0);
++++++++++++getActivity().finish();

++++++++++++getActivity().overridePendingTransition(0,+0);
++++++++++++startActivity(intent);
++++++++}
++++});|code-block|syntax|javascript|1458131|所以你可能会觉得这有点过头了？但是Handler发布允许您在生命周期方法中调用它。我在onRestart/onResume方法中使用了它，当检查用户返回应用程序之间的状态是否发生变化时。(安装了一些东西)。|offset|length|style|CODE|1458132|如果没有Handler，如果你在一个奇怪的地方调用它，它只会终止活动，而不会重新启动它。|1458133|请随时提出任何问题。|1458134|干杯，克里斯|1458135|entityMap^0|0|0|0|H|7|17|9|1H|8|0|4|7|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@$K|10|L|11|M|N]|$K|12|L|13|M|N]|$K|14|L|15|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|16|8|@$K|17|L|18|M|N]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|19|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1A|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|V|$]]

Even though this has been answered multiple times.

If restarting an activity from a fragment, I would do it like so:

<pre><code>new Handler().post(new Runnable() {

 @Override
 public void run()
 {
 Intent intent = getActivity().getIntent();
 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION);
 getActivity().overridePendingTransition(0, 0);
 getActivity().finish();

 getActivity().overridePendingTransition(0, 0);
 startActivity(intent);
 }
 });
</code></pre>

So you might be thinking this is a little overkill?
But the <code>Handler</code> posting allows you to call this in a lifecycle method. I've used this in <code>onRestart</code>/<code>onResume</code> methods when checking if the state has changed between the user coming back to the app. (installed something). 

Without the <code>Handler</code> if you call it in an odd place it will just kill the activity and not restart it.

Feel free to ask any questions.

Cheers,
Chris

blocks|key|1243545|text|好吧，这里没有列出，而是一些已经发布的内容的组合：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1243546|if+(Build.VERSION.SDK_INT+>=+11)+{
++++recreate();+++
}+else+{
++++Intent+intent+=+getIntent();
++++finish();
++++startActivity(intent);
}|code-block|syntax|javascript|1243547|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Well this is not listed but a combo of some that is already posted:

<pre><code>if (Build.VERSION.SDK_INT &gt;= 11) {
 recreate(); 
} else {
 Intent intent = getIntent();
 finish();
 startActivity(intent);
}
</code></pre>

blocks|key|1243488|text|有一种老生常谈的方法应该适用于任何活动，包括主要的活动。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1243489|setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);|code-block|syntax|javascript|1243490|当方向改变时，Android通常会重新创建你的活动(除非你覆盖它)。当Android不能重新创建你的活动时，这个方法对于180度旋转很有用。|1243491|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

There is one hacky way that should work on any activity, including the main one.

<pre><code>setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
</code></pre>

When orientation changes, Android generally will recreate your activity (unless you override it). This method is useful for 180 degree rotations, when Android doesn't recreate your activity.

blocks|key|1458319|text|与strange+SurfaceView+lifecycle+behaviour+with+the+Camera结合使用。我发现recreate()在SurfaceViews的生命周期中表现不佳。在重新创建周期中，surfaceDestroyed不会被调用。它是在onResume+(奇怪)之后调用的，这时我的SurfaceView就被销毁了。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1458320|重新创建活动的原始方法运行良好。|1458321|Intent+intent+=+getIntent();
finish();
startActivity(intent);|code-block|syntax|javascript|1458322|我不知道为什么会这样，但这只是一个观察结果，希望能在未来指导其他人，因为它解决了我在使用SurfaceViews时遇到的问题|1458323|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/11495842/how-surfaceholder-callbacks-are-related-to-activity-lifecycle^0|1|1J|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

In conjunction with <a href="https://stackoverflow.com/questions/11495842/how-surfaceholder-callbacks-are-related-to-activity-lifecycle">strange SurfaceView lifecycle behaviour with the Camera</a>. I have found that recreate() does not behave well with the lifecycle of SurfaceViews. surfaceDestroyed isn't ever called during the recreation cycle. It is called after onResume (strange), at which point my SurfaceView is destroyed.

The original way of recreating an activity works fine.

<pre><code>Intent intent = getIntent();
finish();
startActivity(intent);
</code></pre>

I can't figure out exactly why this is, but it is just an observation that can hopefully guide others in the future because it fixed my problems i was having with SurfaceViews

blocks|key|1243824|text|您的问题的解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1243825|public+static+void+restartActivity(Activity+act){
++++Intent+intent=new+Intent();
++++intent.setClass(act,+act.getClass());
++++((Activity)act).startActivity(intent);
++++((Activity)act).finish();
}|code-block|syntax|javascript|1243826|您需要强制转换为activity+context来启动新的activity，以及完成当前的activity。|1243827|希望这个helpful..and能为我工作。|1243828|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

The solution for your question is:

<pre><code>public static void restartActivity(Activity act){
 Intent intent=new Intent();
 intent.setClass(act, act.getClass());
 ((Activity)act).startActivity(intent);
 ((Activity)act).finish();
}
</code></pre>

You need to cast to activity context to start new activity and as well as to finish the current activity.

Hope this helpful..and works for me.

blocks|key|1457999|text|实际上，以下代码对API级别5和更高级别有效，因此如果您的目标API低于此级别，您将得到与EboMike的代码非常相似的结果。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1458000|intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
overridePendingTransition(0,+0);|code-block|syntax|javascript|1458001|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Actually the following code is valid for API levels 5 and up, so if your target API is lower than this, you'll end up with something very similar to EboMike's code.

<pre><code>intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
overridePendingTransition(0, 0);
</code></pre>

blocks|key|1458177|text|public+void+onRestart()+{
++++super.onRestart();
++++Intent+intent=new+Intent();
++++intent.setClass(act,+act.getClass());
++++finish();
++++act.startActivity(intent);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1458178|试着用这个..|unstyled|1458179|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>public void onRestart() {
 super.onRestart();
 Intent intent=new Intent();
 intent.setClass(act, act.getClass());
 finish();
 act.startActivity(intent);
}
</code></pre>

try to use this ..

blocks|key|1457870|text|如果删除最后一行，将创建新的act活动，但旧实例仍将处于活动状态。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1457871|您是否需要像更改方向时那样重新启动活动(即保存您的状态并将其传递到onCreate(Bundle))？|1457872|如果不这样做，一种可能的解决方法是使用一个额外的虚拟活动，该活动将从第一个活动启动，该作业将启动该活动的新实例。或者只是延迟调用act.finish()，在新的调用启动之后。|1457873|如果您需要保存大部分状态，那么您将陷入相当深的困境，因为将状态的所有属性传递给新实例是非常重要的，尤其是在不泄露旧的上下文/活动的情况下。|1457874|请详细说明您想要做什么。|1457875|entityMap^0|E|3|0|X|G|0|1S|C|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|Y|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|Z|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|O|$]]

If you remove the last line, you'll create new <code>act</code> Activity, but your old instance will still be alive.

Do you need to restart the Activity like when the orientation is changed (i.e. your state is saved and passed to <code>onCreate(Bundle)</code>)?

If you don't, one possible workaround would be to use one extra, dummy Activity, which would be started from the first Activity, and which job is to start new instance of it. Or just delay the call to <code>act.finish()</code>, after the new one is started.

If you need to save most of the state, you are getting in pretty deep waters, because it's non-trivial to pass all the properties of your state, especially without leaking your old Context/Activity, by passing it to the new instance.

Please, specify what are you trying to do.

blocks|key|1458431|text|如果你是从某个片段调用的，那么就执行下面的代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1458432|Intent+intent+=+getActivity().getIntent();
getActivity().finish();
startActivity(intent);|code-block|syntax|javascript|1458433|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you are calling from some fragment so do below code.

<pre><code>Intent intent = getActivity().getIntent();
getActivity().finish();
startActivity(intent);
</code></pre>

blocks|key|1458570|text|我就是这样做的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1458571|++++++++val+i+=+Intent(context!!,+MainActivity::class.java)
++++++++i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
++++++++startActivity(i)|code-block|syntax|javascript|1458572|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is the way I do it. 

<pre><code> val i = Intent(context!!, MainActivity::class.java)
 i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
 startActivity(i)
</code></pre>

blocks|key|1243645|text|调用该方法onCreate。例如onCreate(null);|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1243646|entityMap^0|G|F|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Call the method onCreate. For example <code>onCreate(null);</code>

How do I restart an Android <code>Activity</code>? I tried the following, but the <code>Activity</code> simply quits.

<pre><code>public static void restartActivity(Activity act){

 Intent intent=new Intent();
 intent.setClass(act, act.getClass());
 act.startActivity(intent);
 act.finish();

}
</code></pre>

How to restart Activity in Android

如何重启安卓Activity？我尝试了下面的方法，但是Activity退出了。public static void restartActivity(Activity act){        Intent intent=new Intent();        intent.setClass(act, act.getClass());        act.startActivity(intent

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