我使用以下代码从我的应用程序中启动活动：
Intent intent = new Intent();
intent.setAction("com.android.excample.cutstom_action");
intent.setData(data); //public Uri data
intent.putExtra(Intent.Extra_stream, stream); // public Uri stream
startActivity(intent);
在另一个应用程序中，活动在清单文件中定义如下：
<activity android:name="MyActivity">
<intent-filter>
<action android:name="com.android.excample.cutstom_action"/>
<category android:name = "android.intent.category.DEFAULT"/>
<data android:mimeType="*/*"/>
</intent-filter>
</activity>
但是当我尝试启动活动时，我发现活动未找到异常。 请帮我解决这个问题
崩溃日志如下：
“03-04 20:03:53.351: E/AndroidRuntime(22633): FATAL EXCEPTION: main
03-04 20:03:53.351: E/AndroidRuntime(22633): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.contacts/data/51826 flg=0x1 }} to activity {com.example.test/com.example.test.ContentPickerTester}: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=com.android.excample.cutstom_action }
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.ActivityThread.deliverResults(ActivityThread.java:2983)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3026)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.ActivityThread.access$1100(ActivityThread.java:126)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1180)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.os.Handler.dispatchMessage(Handler.java:99)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.os.Looper.loop(Looper.java:137)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.ActivityThread.main(ActivityThread.java:4456)
03-04 20:03:53.351: E/AndroidRuntime(22633): at java.lang.reflect.Method.invokeNative(Native Method)
03-04 20:03:53.351: E/AndroidRuntime(22633): at java.lang.reflect.Method.invoke(Method.java:511)
03-04 20:03:53.351: E/AndroidRuntime(22633): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
03-04 20:03:53.351: E/AndroidRuntime(22633): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
03-04 20:03:53.351: E/AndroidRuntime(22633): at dalvik.system.NativeStart.main(Native Method)
03-04 20:03:53.351: E/AndroidRuntime(22633): Caused by: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=com.android.excample.cutstom_action }
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1512)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1384)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.Activity.startActivityForResult(Activity.java:3190)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.Activity.startActivity(Activity.java:3297)
03-04 20:03:53.351: E/AndroidRuntime(22633): at com.example.test.ContentPickerTester.onActivityResult(ContentPickerTester.java:64)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.Activity.dispatchActivityResult(Activity.java:4649)
03-04 20:03:53.351: E/AndroidRuntime(22633): at android.app.ActivityThread.deliverResults(ActivityThread.java:2979)”
答案 0 :(得分：1)
设置“。”在清单文件中活动名称之前
".MyActivity"
或使用完全限定的路径设置它，如下所示：
"com.android.excample.MyActivity"