Can't display image formatted png on Android
<p>Today I encounter a strange question. I have a png image "image.png", which is generatied by Java code, and anthor image "a.png". I import them to <code>/sdcard/image/</code> directory. When I invoke code </p>

<pre><code>Bitmap bit = BitmapFactory.decodeFile("/sdcard/image/image.png");
</code></pre>

<p>and </p>

<pre><code>bit = BitmapFactory.decodeFile("/sdcard/image/a.png");
</code></pre>

<p>on Android, the first bit is null but the latter is not. I am sure the path "/sdcard/image" is right.</p>

<p>Could you help me???</p>
