Question

我添加了一个函数，“如果单击列表元素，则执行浏览器应用程序”。在运行浏览器应用程序时按主页按钮并执行另一个应用程序问题是当返回我的应用程序时，发生错误“无法启动活动组件信息”。

对不起，我的英语很弱。

我的应用正在使用ViewPager和Fragment。

问题一步。

我的应用：点击列表元素

Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.com"));

startActivity(intent);
浏览器：按主页按钮
主页：执行其他应用
另一个应用：按主页按钮
主页：执行我的应用
发生错误

日志

03-25 22:26:17.261: E/AndroidRuntime(28894): FATAL EXCEPTION: main
03-25 22:26:17.261: E/AndroidRuntime(28894): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.temp.example/com.temp.example.Main}: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.temp.example.Temp: make sure class name exists, is public, and has an empty constructor that is public
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.app.ActivityThread.access$700(ActivityThread.java:143)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1241)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.os.Handler.dispatchMessage(Handler.java:99)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.os.Looper.loop(Looper.java:137)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.app.ActivityThread.main(ActivityThread.java:4950)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at java.lang.reflect.Method.invokeNative(Native Method)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at java.lang.reflect.Method.invoke(Method.java:511)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at dalvik.system.NativeStart.main(Native Method)
03-25 22:26:17.261: E/AndroidRuntime(28894): Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.temp.example.Temp: make sure class name exists, is public, and has an empty constructor that is public
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.support.v4.app.Fragment.instantiate(Fragment.java:413)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.support.v4.app.FragmentState.instantiate(Fragment.java:97)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.support.v4.app.FragmentManagerImpl.restoreAllState(FragmentManager.java:1790)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:213)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at com.temp.example.Main.onCreate(Main.java:58)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.app.Activity.performCreate(Activity.java:5177)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
03-25 22:26:17.261: E/AndroidRuntime(28894):    ... 11 more
03-25 22:26:17.261: E/AndroidRuntime(28894): Caused by: java.lang.InstantiationException: can't instantiate class com.temp.example.Temp; no empty constructor
03-25 22:26:17.261: E/AndroidRuntime(28894):    at java.lang.Class.newInstanceImpl(Native Method)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at java.lang.Class.newInstance(Class.java:1319)
03-25 22:26:17.261: E/AndroidRuntime(28894):    at android.support.v4.app.Fragment.instantiate(Fragment.java:402)
03-25 22:26:17.261: E/AndroidRuntime(28894):    ... 18 more

如果您知道解决方案，请告诉我。

感谢您的阅读。

Answer 1

访问该教程 How To Open An URL In Android’s Web Browser

或关注该问题How can I open a URL in Android's web browser from my application?

Android - 使用Intent.ACTION_VIEW时无法启动活动组件信息错误

1 个答案: