问题:
MainActivity调用startActivityForResult启动AActivity,AActivity先启动BActivity然后马上finish()。此时MainActivity在后台,前台为BActivity,onActivityForResult是在AActivity执行finish时马上调用还是回到前台才调用?
实验:
MainActivity中输出log:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
Log.d(TAG, "onActivityResult: " + requestCode + " reslut:"+ resultCode);
}
AActivity有个按钮,点击按钮时:
startActivity(new Intent(getBaseContext(), BActivity.class));
setResult(RESULT_OK);
finish();
BActivity也有个按钮,点击按钮时:
// 如果没点击按钮,直接按返回键,则不是RESULT_OK
setResult(RESULT_OK)
finish()
结果:
MainActivity的onActivityForResult会等到BActivity关闭,MainActivity回到前台才调用,resultCode为AActivity设置的值。
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