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[英]Error android.content.ActivityNotFoundException: only in very few devices
[英]ActivityNotFoundException on some Android devices
我在應用商店中上傳了一個Android應用(SDK版本15-25)。 Crashlytics向我報告以下異常:
Fatal Exception: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 sel=act=android.intent.action.MAIN cat=[android.intent.category.APP_MUSIC]} }
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1776)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1496)
at android.app.Activity.startActivityForResult(Activity.java:3798)
at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:50)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:79)
at android.app.Activity.startActivityForResult(Activity.java:3749)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:859)
at android.app.Activity.startActivity(Activity.java:4079)
at android.app.Activity.startActivity(Activity.java:4047)
at com.myapp.myappname.ui.activity.MainActivity.onOptionsItemSelected(MainActivity.java:467)
at android.app.Activity.onMenuItemSelected(Activity.java:2934)
at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:408)
at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:195)
at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:113)
at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:113)
at android.support.v7.app.ToolbarActionBar$2.onMenuItemClick(ToolbarActionBar.java:69)
at android.support.v7.widget.Toolbar$1.onMenuItemClick(Toolbar.java:206)
at android.support.v7.widget.ActionMenuView$MenuBuilderCallback.onMenuItemSelected(ActionMenuView.java:776)
at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822)
at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:156)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:969)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:959)
at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:623)
at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:154)
at android.view.View.performClick(View.java:4807)
at android.view.View$PerformClick.run(View.java:20106)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5576)
at java.lang.reflect.Method.invoke(Method.java)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:955)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:750)
這是MainActivity中的方法:
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.player) {
Timber.i( "Added onClick listener to ImageView ivPlayer.");
Intent intent=Intent.makeMainSelectorActivity(Intent.ACTION_MAIN, Intent.CATEGORY_APP_MUSIC);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
return true;
} else if (id == R.id.logout) {
Toast.makeText(getApplicationContext(), "Logging out...", Toast.LENGTH_LONG).show();
logout();
return true;
}
return super.onOptionsItemSelected(item);
}
以前,我使用以下代碼,但有相同的例外:
Intent intent = new Intent(MediaStore.INTENT_ACTION_MUSIC_PLAYER);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
例外的操作系統是4.4.4和5.0.1。
對這種例外情況有什么想法以及避免這種情況的建議?
例外的操作系統是4.4.4和5.0.1
否。您碰巧收到了那些操作系統版本的崩潰通知。 大約有20億個Android設備,並且其中任何一種都可能發生這種問題。
關於此例外的任何想法
您假設這20億個Android設備中的每一個都有一個或多個應用程序,它們的活動與Intent.ACTION_MAIN
和Intent.CATEGORY_APP_MUSIC
匹配。 不需要任何這些設備進行此類活動。
建議避免嗎?
選項#1:將startActivity()
調用包裝在try
/ catch
塊中,並捕獲ActivityNotFoundException
,然后告訴用戶您找不到合適的應用程序。
選項#2:使用PackageManager
和queryIntentActivities()
來查看Intent
是否匹配。 如果沒有,則不要調用startActivity()
,然后告訴用戶您找不到合適的應用程序。
給你的代碼
Intent intent = new Intent(MediaStore.INTENT_ACTION_MUSIC_PLAYER);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
添加以下內容
try {
List<ResolveInfo> activities = getPackageManager().queryIntentActivities(intent, PackageManager.GET_ACTIVITIES);
if (activities.size() > 0)
startActivity(intent);
else
Toast.makeText(MainActivity.this, "A music player is absent on your device!", Toast.LENGTH_SHORT).show();
} catch (ActivityNotFoundException e) {
e.printStackTrace();
} catch (SecurityException e){
e.printStackTrace();
}
致命異常可能是您傳遞了空對象。
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