我已经在我的Android应用程序中实现了一个ListView。我使用ArrayAdapter类的自定义子类绑定到这个ListView。在重写的ArrayAdapter.getView(…)方法中,我分配了一个OnClickListener。在OnClickListener的onClick方法中,我想启动一个新活动。我得到了一个异常:
Calling startActivity() from outside of an Activity context requires the
FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
我怎样才能得到ListView(当前活动)正在工作的上下文?
在Android 28(Android P)启动活动
if ((intent.getFlags() & Intent.FLAG_ACTIVITY_NEW_TASK) == 0
&& (targetSdkVersion < Build.VERSION_CODES.N
|| targetSdkVersion >= Build.VERSION_CODES.P)
&& (options == null
|| ActivityOptions.fromBundle(options).getLaunchTaskId() == -1)) {
throw new AndroidRuntimeException(
"Calling startActivity() from outside of an Activity "
+ " context requires the FLAG_ACTIVITY_NEW_TASK flag."
+ " Is this really what you want?");
}
所以最好的方法是添加FLAG_ACTIVITY_NEW_TASK
Intent intent = new Intent(context, XXXActivity.class);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
}
context.startActivity(intent);