blocks|key|4556335|text|试着这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4556336|在一个练习中：|4556337|Intent+i+=+new+Intent();
Bundle+bundle+=+new+Bundle();
bundle.putInt("id",+c.getId());
bundle.putInt("mode",+AREA_MODE);++++
i.putExtras(bundle);|code-block|syntax|javascript|4556338|在另一个练习中：|4556339|Bundle+extras+=+getIntent().getExtras();
if+(extras+!=+null)+{
++++id+=+extras.getInt("id",+-1);
++++mode+=+extras.getInt("mode",+COUNTRY_MODE);++++
}|4556340|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Try like this:

In one Activity:

<pre><code>Intent i = new Intent();
Bundle bundle = new Bundle();
bundle.putInt("id", c.getId());
bundle.putInt("mode", AREA_MODE); 
i.putExtras(bundle);
</code></pre>

In Another Activity:

<pre><code>Bundle extras = getIntent().getExtras();
if (extras != null) {
 id = extras.getInt("id", -1);
 mode = extras.getInt("mode", COUNTRY_MODE); 
}
</code></pre>

blocks|key|2956923|text|应该是这样的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2956924|Intent+i+=+new+Intent(MainListActivity.this+,MainActivity.class);
i.putExtra("id",+c.getId());
i.putExtra("mode",+AREA_MODE);
startActivity(i);|code-block|syntax|javascript|2956925|和|2956926|Intent+i+=+this.getIntent();
id+=+i.getIntExtra("id",+-1);
mode+=+i.getIntExtra("mode",+COUNTRY_MODE);|2956927|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]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

It should be this.

<pre><code>Intent i = new Intent(MainListActivity.this ,MainActivity.class);
i.putExtra("id", c.getId());
i.putExtra("mode", AREA_MODE);
startActivity(i);
</code></pre>

and

<pre><code>Intent i = this.getIntent();
id = i.getIntExtra("id", -1);
mode = i.getIntExtra("mode", COUNTRY_MODE);
</code></pre>

blocks|key|4556414|text|You+do++add+extras+to+an+intent的方式如下：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|4556415|+i.putExtra("extras",+extras);|code-block|syntax|javascript|4556416|这会在意图中添加一个额外的“附加”。你的“额外任务”在意图中处于非标准的位置。如果您的onCreate()代码要检索映射到"extras“的对象并查看它，您将找到您的"extras”。|CODE|4556417|标准方法是通过putExtras填充bundle并将其添加到intent|4556418|i.putExtras(bundle);|4556419|或者使用方便的方法，如putExtra|4556420|i.putExtra("mode",+AREA_MODE);|4556421|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/content/Intent.html#putExtras%2528android.os.Bundle%2529|1|http://developer.android.com/reference/android/os/Bundle.html|2|http://developer.android.com/reference/android/content/Intent.html#putExtra%2528java.lang.String,%2520double%255B%255D%2529^0|4|3|0|0|17|A|0|7|9|0|I|6|1|0|0|B|8|2|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1B|8|@$9|1C|A|1D|B|M]]|D|@]|E|$]]|$1|N|3|O|5|6|7|1E|8|@]|D|@$9|1F|A|1G|1|1H]|$9|1I|A|1J|1|1K]]|E|$]]|$1|P|3|Q|5|H|7|1L|8|@]|D|@]|E|$I|J]]|$1|R|3|S|5|6|7|1M|8|@]|D|@$9|1N|A|1O|1|1P]]|E|$]]|$1|T|3|U|5|H|7|1Q|8|@]|D|@]|E|$I|J]]|$1|V|3|-4|5|6|7|1R|8|@]|D|@]|E|$]]]|W|$X|$5|Y|Z|10|E|$11|12]]|13|$5|Y|Z|10|E|$11|14]]|15|$5|Y|Z|10|E|$11|16]]]]

You do not add extras to an intent this way:

<pre><code> i.putExtra("extras", extras);
</code></pre>

This puts an extra called "extras" into the intent. Your "extras" are in a non-standard place in the intent. If your <code>onCreate()</code> code were to retrieve the object mapped to "extras" and look in it, you would find your "extras".

The standard way is to populate a <a href="http://developer.android.com/reference/android/os/Bundle.html" rel="nofollow">bundle</a> and add it to the intent via <a href="http://developer.android.com/reference/android/content/Intent.html#putExtras%28android.os.Bundle%29" rel="nofollow">putExtras</a>:

<pre><code>i.putExtras(bundle);
</code></pre>

or use the convenience methods like <a href="http://developer.android.com/reference/android/content/Intent.html#putExtra%28java.lang.String,%20double%5B%5D%29" rel="nofollow">putExtra</a>:

<pre><code>i.putExtra("mode", AREA_MODE);
</code></pre>

blocks|key|2956991|text|请参阅以下链接：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2956992|2956993|http://thedevelopersinfo.com/2009/10/15/passing-data-between-activities-in-android/|unordered-list-item|offset|length|2956994|2956995|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|2B|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|D]]]]

Kindly refer to the following link:

<ul>
<li><a href="http://thedevelopersinfo.com/2009/10/15/passing-data-between-activities-in-android/" rel="nofollow">http://thedevelopersinfo.com/2009/10/15/passing-data-between-activities-in-android/</a></li>
</ul>

blocks|key|1794441|text|我没有找到这个问题的原因，所以我放弃了使用一个活动。我已经创建了其他活动，扩展了有问题的活动，它开始工作(两种方法都有)。感谢大家的帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1794442|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I didn't find the cause of this issue so i gave up on using one activity. I have create others activities extending the problematic one and it started working (with both approach). Thank you all for your help.

blocks|key|1797254|text|啊哈！我刚刚调试了这个问题。事实证明，这是由于一个微妙的细节。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1797255|1797256|+PendingIntent是对系统维护令牌的引用。因此，即使发送过程重新启动，重建类似的意图也会检索到原始的PendingIntent。然后发送者可以取消或更改它。|unordered-list-item|1797257|Similar+intent+==相同的操作、操作、数据、类别、组件和标志。额外值不算数！仅在额外值上不同的|1797258|意图都检索相同的标记。|1797259|1797260|1797261|人们常犯的一个错误是创建多个PendingIntent对象，这些对象的意图只是在它们的“额外”内容上有所不同，期望每次都能得到不同的PendingIntent。这种情况不会发生。|blockquote|1797262|1797263|1797264|解决方案1:创建一个不同的PendingIntent。它必须有不同的操作、动作、数据、类别、组件或标志--或者请求代码整数。|offset|length|style|BOLD|1797265|解决方法2:使用FLAG_CANCEL_CURRENT或FLAG_UPDATE_CURRENT取消或修改任何现有的PendingIntent。|CODE|1797266|这两个修复产生的结果略有不同。无论哪种方式，你的新附加软件都应该可以通过。|1797267|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|6|0|0|6|8|J|S|J|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|14|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|15|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|16|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|17|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|18|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|19|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1A|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1D|8|@$S|1E|T|1F|U|V]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1G|8|@$S|1H|T|1I|U|V]|$S|1J|T|1K|U|Y]|$S|1L|T|1M|U|Y]]|9|@]|A|$]]|$1|Z|3|10|5|6|7|1N|8|@]|9|@]|A|$]]|$1|11|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|12|$]]

Aha! I just debugged this problem. It turns out to be due to a subtle detail <a href="http://developer.android.com/reference/android/app/PendingIntent.html" rel="nofollow">documented in PendingIntent</a>.

<ul>
<li>A PendingIntent is a reference to a system-maintained token. So even if the sending process restarts, reconstructing a similar intent will retrieve the original PendingIntent. Then the sender can cancel or change it.</li>
<li>Similar intent == same operation, action, data, categories, components, and flags. Extras don't count!</li>
<li>Intents that differ only in their Extras all retrieve the same token.</li>
</ul>

<blockquote>
 A common mistake people make is to create multiple PendingIntent objects with Intents that only vary in their "extra" contents, expecting to get a different PendingIntent each time. This does not happen.
</blockquote>

Fix 1: Make a distinct PendingIntent. It must have different operation, action, data, categories, components, or flags -- or request code integers.

Fix 2: Use <code>FLAG_CANCEL_CURRENT</code> or <code>FLAG_UPDATE_CURRENT</code> to cancel or modify any existing PendingIntent.

Those two fixes produce slightly different results. Either way, your new Extras should get through.

I have an activity that I use in multiples modes, so I have to do things like this:

<pre><code> Intent i = new Intent(MainListActivity.this,MainActivity.class);
 extras.putInt("id", c.getId());
 extras.putInt("mode", AREA_MODE);
 i.putExtra("extras", extras);
 startActivity(i);
</code></pre>

and in the <code>onCreate</code>:

<pre><code> Intent i = this.getIntent();
 extras = i.getBundleExtra("extras");
 if(extras!=null){
 id = extras.getInt("id", -1);
 mode = extras.getInt("mode", COUNTRY_MODE);
 }
</code></pre>

But the intent extras are always null. Am I missing something? Is there any way to do this?

EDIT: For some reason, the <code>getIntent()</code> method returns the previous <code>Intent</code> which in my case has no extra (main intent). I'm trying to figure out why.

Unable to retrieve intent's extras

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个在多模式下使用的活动，所以我必须这样做：    Intent i = new Intent(MainListActivity.this,MainActivity.class);    extras.putInt("id", c.getId());    extras.putInt("mode", AREA_MO...

问无法检索意图的附加内容
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问无法检索意图的附加内容EN