Question

我正在尝试使用ACTION_MAIN从另一个活动启动一个活动。我这样做是因为我想向其他应用程序提供启动此次要活动的可能性。所以在我的清单中我有两个主要活动：

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="main.package"
    android:versionCode="34"
    android:versionName="3.04"
     android:installLocation="preferExternal"
     >

....
    <activity
            android:name=".SplashActivity"
            android:label="@string/app_name" 
             android:icon="@drawable/myicon"
            >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>


        </activity>

     <activity
            android:name="main.package.secondary.SecondaryActivity"
            android:label="@string/memorapp"
            android:theme="@style/Theme.Sherlock.Light"
               android:taskAffinity="main.package.secondary.SecondaryActivity"
             >
             <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

        </activity>

在我的主要活动中，我运行以下代码：

Intent intent = new Intent(Intent.ACTION_MAIN);

   ComponentName cn = new ComponentName("main.package.secondary","main.package.secondary.SecondaryActivity");
   intent.setComponent(cn);                                         
   startActivity(intent);

这里是logcat：

03-28 16:35:41.987: E/AndroidRuntime(9921): FATAL EXCEPTION: main
03-28 16:35:41.987: E/AndroidRuntime(9921): android.content.ActivityNotFoundException: Unable to find explicit activity class {main.package.secondary/main.package.secondary.secondaryMainActivity}; have you declared this activity in your AndroidManifest.xml?
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1405)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1379)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.app.Activity.startActivityForResult(Activity.java:2827)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:674)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.app.Activity.startActivity(Activity.java:2933)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at main.package.MainActivity.onMenufrag(MainActivity.java:206)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at main.package.MenuFragment.sendBodyTextToActivity(MenuFragment.java:92)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at main.package.MenuFragment.access$0(MenuFragment.java:90)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at main.package.MenuFragment$1.onClick(MenuFragment.java:66)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.view.View.performClick(View.java:2501)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.view.View$PerformClick.run(View.java:9107)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.os.Handler.handleCallback(Handler.java:587)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.os.Handler.dispatchMessage(Handler.java:92)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.os.Looper.loop(Looper.java:130)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at android.app.ActivityThread.main(ActivityThread.java:3835)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at java.lang.reflect.Method.invokeNative(Native Method)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at java.lang.reflect.Method.invoke(Method.java:507)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
03-28 16:35:41.987: E/AndroidRuntime(9921):     at dalvik.system.NativeStart.main(Native Method)

你能告诉我为什么我的Activity没有找到，或者我该怎么办才能启动我的SecondaryActivity

Answer 1

你可以尝试一下吗？

Intent intent = new Intent(Intent.ACTION_MAIN);

ComponentName cn = new ComponentName("main.package","main.package.secondary.SecondaryActivity");
intent.setComponent(cn);
startActivity(intent);

第一个参数采用“应用程序包名称”

Answer 2

尝试将以下intent-filters设置为第二个活动：

<intent-filter>
    <action android:name="main.package.secondary.SecondaryActivity" />
    <category android:name="android.intent.category.DEFAULT" />
</intent-filter>

Answer 3

放入manifest.xml：

<activity android:name="main.package.secondary.SecondaryActivity" android:label="@string/memorapp" android:theme="@style/Theme.Sherlock.Light" android:taskAffinity="main.package.secondary.SecondaryActivity">  </activity>

没有intent-filter属性。

通过ACTION_MAIN启动Activity时的ActivityNotFoundException

3 个答案: