Question

我使用此代码通过我的应用程序打开了Gallery应用程序 -

Intent galleryIntent = new Intent(Intent.ACTION_VIEW, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
galleryIntent.setType("image/*");
startActivity(galleryIntent);

当我选择＆＃34;打开图库＆＃34;时，图库应用程序在OnePlus One设备上与此堆栈跟踪崩溃 -

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cyngn.gallerynext/com.cyngn.gallerynext.app.fullscreenviewer.FullscreenViewer}: java.lang.NullPointerException: uriString
                                                   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
                                                   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420)
                                                   at android.app.ActivityThread.access$900(ActivityThread.java:154)
                                                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
                                                   at android.os.Handler.dispatchMessage(Handler.java:102)
                                                   at android.os.Looper.loop(Looper.java:135)
                                                   at android.app.ActivityThread.main(ActivityThread.java:5292)
                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                   at java.lang.reflect.Method.invoke(Method.java:372)
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
                                                Caused by: java.lang.NullPointerException: uriString
                                                   at android.net.Uri$StringUri.<init>(Uri.java:470)
                                                   at android.net.Uri$StringUri.<init>(Uri.java:460)
                                                   at android.net.Uri.parse(Uri.java:432)
                                                   at com.cyngn.gallerynext.app.fullscreenviewer.FullscreenViewer.a(SourceFile:305)
                                                   at com.cyngn.gallerynext.app.fullscreenviewer.FullscreenViewer.onCreate(SourceFile:217)
                                                   at android.app.Activity.performCreate(Activity.java:5990)
                                                   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
                                                   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2311)
                                                   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420) 
                                                   at android.app.ActivityThread.access$900(ActivityThread.java:154) 
                                                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321) 
                                                   at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                   at android.os.Looper.loop(Looper.java:135) 
                                                   at android.app.ActivityThread.main(ActivityThread.java:5292) 
                                                   at java.lang.reflect.Method.invoke(Native Method) 
                                                   at java.lang.reflect.Method.invoke(Method.java:372) 
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) 
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)

我不想将特定的URI传递给它，我只是想让它打开默认的图库文件夹。我该如何避免这次崩溃？

Answer 1

不使用setType("image/*")

时使用

Intent galleryIntent = new Intent(Intent.ACTION_VIEW, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivity(galleryIntent);

yourIntent.setType(String mimeType)这表示您想要获取的MIME类型数据。使用android.provider.MediaStore.Images.Media您有常量MIME。我想，在这里您可以找到更多docs

Answer 2

如果您想仅打开应用（因为您写道：我只是想让它打开默认的图库文件夹）：

Intent intent = new Intent("com.cyngn.gallerynext");

或

如果您想从图库see this post how to do it获取任何数据。

Android - Gallery App NullPointerException - OnePlus One

2 个答案: