这是推动我疯了！这是我的code（我知道这个文件存在）：

This is driving me insane! Here's my code (I know this file exists):

File imageFile = new File("/sdcard/gallery_photo_4.jpg");
ImageView jpgView = (ImageView)findViewById(R.id.imageView);
BitmapDrawable d = new BitmapDrawable(getResources(), imageFile.getAbsolutePath());
jpgView.setImageDrawable(d);

该错误的最后一行（第28行，下面引用）发生。

The error occurs on that last line (line 28, referenced below).

错误输出：

W/dalvikvm(  865): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
E/AndroidRuntime(  865): FATAL EXCEPTION: main
E/AndroidRuntime(  865): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.example.camera/org.example.camera.Imgview}: java.lang.NullPointerException
E/AndroidRuntime(  865):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
E/AndroidRuntime(  865):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
E/AndroidRuntime(  865):    at android.app.ActivityThread.access$2300(ActivityThread.java:125)
E/AndroidRuntime(  865):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
E/AndroidRuntime(  865):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(  865):    at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(  865):    at android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime(  865):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(  865):    at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime(  865):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(  865):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime(  865):    at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(  865): Caused by: java.lang.NullPointerException
E/AndroidRuntime(  865):    at org.example.camera.Imgview.onCreate(Imgview.java:28)
E/AndroidRuntime(  865):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
E/AndroidRuntime(  865):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
E/AndroidRuntime(  865):    ... 11 more
W/ActivityManager(   59):   Force finishing activity org.example.camera/.Imgview

我的布局看起来像（可能没有必要）：

My layout looks like (probably not necessary):

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView android:id="@+id/imageView" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:scaleType="center">
</ImageView>
</LinearLayout>

非常感谢您的任何帮助。

Thank you very much for any help.

推荐答案

我宁愿用一个BitmapFactory脱code从文件路径的图片：

I would rather use a BitmapFactory to decode the Image from the file-path:

Bitmap bitmap = BitmapFactory.decodeFile(imageFile.getAbsolutePath());
jpgView.setImageBitmap(bitmap);

文档说：

如果指定的文件名称为空，或者不能去codeD插入   位图，该函数返回null。

If the specified file name is null, or cannot be decoded into a bitmap, the function returns null.

你能检查code可以与另一幅图像，如果你可以在你的电脑的思想打开你的形象。可能是文件损坏。

Can you check if the code works with another image and if you can open your image on your PC thought. Maybe the file is corrupt.