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POAndroid ImageView: Generating Drawable object from local file fails
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copied!<p>I'm creating an App for displaying images from a previously specified source. I will be downloading these images if a version file has changed. If there is no internet connection available, it will display the local images I have previously downloaded.</p> <p>For this, I am using an ImageView and Drawable objects like this:</p> <pre><code>String imageName = Startseite.FILENAME_PRE + "1" + Startseite.FILENAME_POST; Drawable d = Drawable.createFromPath(imageName); mImageView.setImageDrawable(d); </code></pre> <p>I triple checked via DDMS that the file specified (in this case "page1.jpeg") does indeed exist in the directory "data/data/out.path/files/image1.jpeg". However, in the above code example the second command returns a null object. The file is readable and writable by normal means (streams), but it seems the ImageView doesn't like the image.</p> <p>I'm not sure how to proceed from here. It could either be that I am missing a crucial security element that allows for the display of images. Or, maybe the image cannot be displayed. Is there a tool to check for displayable images?</p> <p>Thank you for your time.</p> <p>Edit 1: I have changed the code to this:</p> <pre><code>String imageName = Startseite.FILENAME_PRE + "1" + Startseite.FILENAME_POST; String imageNameWithPath = getApplicationContext().getFilesDir().getPath() + '/' + imageName; Drawable d = Drawable.createFromPath(imageNameWithPath); </code></pre> <p>This creates the Drawable object successfully. Sadly, when assigning the object via SetImageDrawable(), my debugger goes nuts and reads 4 exceptions in classes I have never heard of (most probably some Android interna). I have checked for a double slash (because I copy one to the end), but the path looks clean.</p> <p>Edit 2: Sadly, the same happens when I create the drawable from a stream and not download the image beforehand.</p> <p>Edit 3: Here is the LogCat snippet of when the application fails.</p> <pre><code>06-28 08:14:32.323: WARN/dalvikvm(21462): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 06-28 08:14:32.323: ERROR/AndroidRuntime(21462): Uncaught handler: thread main exiting due to uncaught exception 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): java.lang.RuntimeException: Unable to start activity ComponentInfo{de.ourcompany.apps/de.ourcompany.apps.Startseite}: java.lang.NullPointerException 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.os.Handler.dispatchMessage(Handler.java:99) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.os.Looper.loop(Looper.java:123) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.app.ActivityThread.main(ActivityThread.java:4363) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at java.lang.reflect.Method.invokeNative(Native Method) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at java.lang.reflect.Method.invoke(Method.java:521) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at dalvik.system.NativeStart.main(Native Method) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): Caused by: java.lang.NullPointerException 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at de.ourcompany.apps.Startseite.displayImages(Startseite.java:61) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at de.ourcompany.apps.Startseite.onCreate(Startseite.java:42) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459) 06-28 08:14:32.343: ERROR/AndroidRuntime(21462): ... 11 more 06-28 08:14:32.373: INFO/Process(64): Sending signal. PID: 21462 SIG: 3 06-28 08:14:32.373: INFO/dalvikvm(21462): threadid=7: reacting to signal 3 06-28 08:14:32.373: ERROR/dalvikvm(21462): Unable to open stack trace file '/data/anr/traces.txt': Permission denied </code></pre> <p>I tried the version using the BitmapFactory.decode() method, sadly it results in an exception as well.</p> <p>What I can add: The following code stems from a video tutorial:</p> <pre><code> String mUrlString = "http://www.android.com/images/gingerdroid.png"; try { mImageView.setImageDrawable( Drawable.createFromStream( (InputStream) new URL(mUrlString).getContent(), "qrcode") ); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } </code></pre> <p>This code works in the tutorial, yet it exits with the exact same image the same way that my tries do so far.</p> <p>Hope this helps.</p> <p>Edit 4: The problem has kinda resolved itself. I created the project anew, copypastad the old source, created the VM anew, suddenly it works. If it was the old project or the VM, I cannot say for sure.</p>

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