Merespons perubahan visibilitas UI
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Tutorial ini menjelaskan cara mendaftarkan pemroses sehingga aplikasi Anda dapat menerima notifikasi
perubahan visibilitas UI sistem. Hal ini berguna jika Anda ingin
menyinkronkan bagian lain UI Anda dengan menyembunyikan/menampilkan kolom sistem.
Mendaftarkan Pemroses
Untuk menerima notifikasi tentang perubahan visibilitas UI sistem, daftarkan
View.OnSystemUiVisibilityChangeListener ke tampilan Anda.
Biasanya ini adalah tampilan yang Anda gunakan untuk mengontrol visibilitas navigasi.
Misalnya, Anda dapat menambahkan kode ini ke aktivitas
Metode onCreate():
Kotlin
window.decorView.setOnSystemUiVisibilityChangeListener { visibility ->
// Note that system bars will only be "visible" if none of the
// LOW_PROFILE, HIDE_NAVIGATION, or FULLSCREEN flags are set.
if (visibility and View.SYSTEM_UI_FLAG_FULLSCREEN == 0) {
// TODO: The system bars are visible. Make any desired
// adjustments to your UI, such as showing the action bar or
// other navigational controls.
} else {
// TODO: The system bars are NOT visible. Make any desired
// adjustments to your UI, such as hiding the action bar or
// other navigational controls.
}
}
Java
View decorView = getWindow().getDecorView();
decorView.setOnSystemUiVisibilityChangeListener
(new View.OnSystemUiVisibilityChangeListener() {
@Override
public void onSystemUiVisibilityChange(int visibility) {
// Note that system bars will only be "visible" if none of the
// LOW_PROFILE, HIDE_NAVIGATION, or FULLSCREEN flags are set.
if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
// TODO: The system bars are visible. Make any desired
// adjustments to your UI, such as showing the action bar or
// other navigational controls.
} else {
// TODO: The system bars are NOT visible. Make any desired
// adjustments to your UI, such as hiding the action bar or
// other navigational controls.
}
}
});
Ini umumnya praktik yang baik untuk menjaga UI Anda tetap sinkron dengan perubahan di bilah sistem
visibilitas tinggi. Misalnya, Anda bisa menggunakan pemroses ini untuk menyembunyikan dan menampilkan bilah tindakan di
konser dengan {i>status bar<i}
yang tersembunyi dan ditampilkan.
Konten dan contoh kode di halaman ini tunduk kepada lisensi yang dijelaskan dalam Lisensi Konten. Java dan OpenJDK adalah merek dagang atau merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-27 UTC.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Informasi yang saya butuhkan tidak ada","missingTheInformationINeed","thumb-down"],["Terlalu rumit/langkahnya terlalu banyak","tooComplicatedTooManySteps","thumb-down"],["Sudah usang","outOfDate","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Masalah kode / contoh","samplesCodeIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],["Terakhir diperbarui pada 2025-07-27 UTC."],[],[],null,["# Respond to UI visibility changes\n\nThis lesson describes how to register a listener so that your app can get notified\nof system UI visibility changes. This is useful if you want to\nsynchronize other parts of your UI with the hiding/showing of system bars.\n\nRegister a Listener\n-------------------\n\nTo get notified of system UI visibility changes, register an\n[View.OnSystemUiVisibilityChangeListener](/reference/android/view/View.OnSystemUiVisibilityChangeListener) to your view.\nThis is typically the view you are using to control the navigation visibility.\n\nFor example, you could add this code to your activity's\n[onCreate()](/reference/android/app/Activity#onCreate(android.os.Bundle)) method: \n\n### Kotlin\n\n```kotlin\nwindow.decorView.setOnSystemUiVisibilityChangeListener { visibility -\u003e\n // Note that system bars will only be \"visible\" if none of the\n // LOW_PROFILE, HIDE_NAVIGATION, or FULLSCREEN flags are set.\n if (visibility and View.SYSTEM_UI_FLAG_FULLSCREEN == 0) {\n // TODO: The system bars are visible. Make any desired\n // adjustments to your UI, such as showing the action bar or\n // other navigational controls.\n } else {\n // TODO: The system bars are NOT visible. Make any desired\n // adjustments to your UI, such as hiding the action bar or\n // other navigational controls.\n }\n}\n```\n\n### Java\n\n```java\nView decorView = getWindow().getDecorView();\ndecorView.setOnSystemUiVisibilityChangeListener\n (new View.OnSystemUiVisibilityChangeListener() {\n @Override\n public void onSystemUiVisibilityChange(int visibility) {\n // Note that system bars will only be \"visible\" if none of the\n // LOW_PROFILE, HIDE_NAVIGATION, or FULLSCREEN flags are set.\n if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {\n // TODO: The system bars are visible. Make any desired\n // adjustments to your UI, such as showing the action bar or\n // other navigational controls.\n } else {\n // TODO: The system bars are NOT visible. Make any desired\n // adjustments to your UI, such as hiding the action bar or\n // other navigational controls.\n }\n }\n});\n```\n\nIt's generally good practice to keep your UI in sync with changes in system bar\nvisibility. For example, you could use this listener to hide and show the action bar in\nconcert with the status bar hiding and showing."]]
