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private val requestDataLauncher =//注册ActivityResult的观察者 当启动的Activity返回结果时 这个观察者会被触发registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->if (result.resultCode == 0) {mAdapter.removeEmptyView()srl.finishRefresh()}}

titleBar.setRightIcon(R.drawable.sdk_track_icon_edit) {val intent = Intent(this, TrackEditActivity::class.java).apply {putExtra(START_DATE,startDate)}//通过ActivityResult观察者启动一个Activity 并在其销毁后返回结果requestDataLauncher.launch(intent)
}