正如Android文档所说
Snackbars 提供有关操作的轻量级反馈。它们在移动设备的屏幕底部和较大设备的左下方显示一条简短消息。
是否有任何替代方法可以显示snackbars在屏幕顶部而不是底部？
现在我正在做这样的事情，它snackbar在屏幕底部显示一个。
Snackbar.make(findViewById(android.R.id.content), "Hello this is a snackbar!!!",
Snackbar.LENGTH_LONG).setAction("Undo", mOnClickListener)
.setActionTextColor(Color.RED)
.show();
可以使用以下方法使小吃栏出现在屏幕顶部：
Snackbar snack = Snackbar.make(parentLayout, str, Snackbar.LENGTH_LONG);
View view = snack.getView();
FrameLayout.LayoutParams params =(FrameLayout.LayoutParams)view.getLayoutParams();
params.gravity = Gravity.TOP;
view.setLayoutParams(params);
snack.show();
从OP：
我不得不改变第一行：
Snackbar snack = Snackbar.make(findViewById(android.R.id.content), "Had a snack at Snackbar", Snackbar.LENGTH_LONG);
CoordinatorLayout coordinatorLayout=(CoordinatorLayout)findViewById(R.id.coordinatorLayout);
Snackbar snackbar = Snackbar.make(coordinatorLayout, "Text", Snackbar.LENGTH_LONG);
View view = snackbar.getView();
CoordinatorLayout.LayoutParams params=(CoordinatorLayout.LayoutParams)view.getLayoutParams();
params.gravity = Gravity.TOP;
view.setLayoutParams(params);
snackbar.show();
val snackBarView = Snackbar.make(view, "SnackBar Message" , Snackbar.LENGTH_LONG)
val view = snackBarView.view
val params = view.layoutParams as FrameLayout.LayoutParams
params.gravity = Gravity.TOP
view.layoutParams = params
view.background = ContextCompat.getDrawable(context,R.drawable.custom_drawable) // for custom background
snackBarView.animationMode = BaseTransientBottomBar.ANIMATION_MODE_FADE
snackBarView.show()
下面的行将解决动画问题。
snackBarView.animationMode = BaseTransientBottomBar.ANIMATION_MODE_FADE
替代解决方案-
snackBarView.anchorView = mention viewId above whom you want to show SnackBar
您可以执行以下操作以将 SnackBar 放置在布局内的任何位置（此方法没有动画问题）
1) 根据：
Snackbar make (View view, CharSequence text, int duration)
制作一个 Snackbar 来显示一条消息 Snackbar 将尝试从给定的值中找到一个父视图来保存 Snackbar 的视图。Snackbar 将沿着视图树向上寻找合适的父级，该父级定义为 CoordinatorLayout 或窗口装饰的内容视图，以先到者为准。
因此，只需在所需位置添加一个 Coordinator Layout 并使用该 Coordinator Layout 作为上述 Snackbar.make 方法中的视图参数，就可以在布局内的任何位置放置一个snackBar。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".MainActivity"
android:orientation="vertical"
android:id="@+id/rl"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Coordinator Layout used to position the SnackBar -->
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cl"
android:layout_alignParentTop="true"
android:background="@android:color/transparent">
</android.support.design.widget.CoordinatorLayout>
<!-- add your layout here -->
</RelativeLayout>
2) 用于显示 SnackBar 的 Coordinator Layout 应位于所有其他视图的顶部（最高海拔）。为此，可以调用bringToFront()协调器布局或提升协调器布局（
android:elevation="10dp"例如添加）
3) 此时snackBar 将显示在所需位置，但snackBar 以自下而上的动画显示（默认行为）。为了实现从上到下的动画，您可以执行以下操作：
4) 在第 3 步之后，snackBar 会显示一个从上到下的动画，但是消息和操作文本是旋转的并且重力是反转的，所以作为最后一步，我做了以下操作：
5) 示例：
public class MainActivity extends AppCompatActivity {
private final String TAG = MainActivity.class.getSimpleName();
private RelativeLayout rl;
private CoordinatorLayout cl;
private CoordinatorLayout cl1;
private CoordinatorLayout cl2;
private CoordinatorLayout cl3;
private CoordinatorLayout cl4;
private Snackbar snackbar_updated;
private Snackbar snackbar_updated1;
private Snackbar snackbar_updated2;
private Snackbar snackbar_updated3;
private Snackbar snackbar_updated4;
private Snackbar snackbar_ordinary;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rl = (RelativeLayout) findViewById(R.id.rl);
cl = (CoordinatorLayout) findViewById(R.id.cl);
cl1 = (CoordinatorLayout) findViewById(R.id.cl1);
cl2 = (CoordinatorLayout) findViewById(R.id.cl2);
cl3 = (CoordinatorLayout) findViewById(R.id.cl3);
cl4 = (CoordinatorLayout) findViewById(R.id.cl4);
cl.bringToFront();
cl1.bringToFront();
cl2.bringToFront();
cl3.bringToFront();
cl4.bringToFront();
snackbar_updated = Snackbar.make(cl, "Message", Snackbar.LENGTH_INDEFINITE);
snackbar_updated.setAction("Ok", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
/** Snackbar message and action TextViews are placed inside a LinearLayout
*/
final Snackbar.SnackbarLayout snackBarLayout = (Snackbar.SnackbarLayout) snackbar_updated.getView();
for (int i = 0; i < snackBarLayout.getChildCount(); i++) {
View parent = snackBarLayout.getChildAt(i);
if (parent instanceof LinearLayout) {
((LinearLayout) parent).setRotation(180);
break;
}
}
snackbar_updated1 = Snackbar.make(cl1, "Message", Snackbar.LENGTH_INDEFINITE);
snackbar_updated1.setAction("Ok", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
/** Snackbar message and action TextViews are placed inside a LinearLayout
*/
final Snackbar.SnackbarLayout snackBarLayout1 = (Snackbar.SnackbarLayout) snackbar_updated1.getView();
for (int i = 0; i < snackBarLayout1.getChildCount(); i++) {
View parent = snackBarLayout1.getChildAt(i);
if (parent instanceof LinearLayout) {
((LinearLayout) parent).setRotation(180);
break;
}
}
snackbar_updated2 = Snackbar.make(cl2, "Message", Snackbar.LENGTH_INDEFINITE);
snackbar_updated2.setAction("Ok", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
snackbar_updated3 = Snackbar.make(cl3, "Message", Snackbar.LENGTH_INDEFINITE);
snackbar_updated3.setAction("Ok", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
/** Snackbar message and action TextViews are placed inside a LinearLayout
*/
Snackbar.SnackbarLayout snackBarLayout3 = (Snackbar.SnackbarLayout) snackbar_updated3.getView();
for (int i = 0; i < snackBarLayout3.getChildCount(); i++) {
View parent = snackBarLayout3.getChildAt(i);
if (parent instanceof LinearLayout) {
((LinearLayout) parent).setRotation(180);
break;
}
}
snackbar_updated4 = Snackbar.make(cl4, "Message", Snackbar.LENGTH_INDEFINITE);
snackbar_updated4.setAction("Ok", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
snackbar_ordinary = Snackbar.make(rl, "Message", Snackbar.LENGTH_INDEFINITE);
snackbar_ordinary.setAction("Ok", new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
rl.post(new Runnable() {
@Override
public void run() {
snackbar_updated.show();
rl.postDelayed(new Runnable() {
@Override
public void run() {
snackbar_updated1.show();
rl.postDelayed(new Runnable() {
@Override
public void run() {
snackbar_updated2.show();
rl.postDelayed(new Runnable() {
@Override
public void run() {
snackbar_updated3.show();
rl.postDelayed(new Runnable() {
@Override
public void run() {
snackbar_updated4.show();
rl.postDelayed(new Runnable() {
@Override
public void run() {
snackbar_ordinary.show();
}
}, 2000);
}
}, 2000);
}
}, 2000);
}
}, 2000);
}
}, 2000);
}
});
}
}
活动主.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".MainActivity"
android:orientation="vertical"
android:id="@+id/rl"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Coordinator Layout used to position the SnackBar -->
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cl"
android:rotation="180"
android:layout_alignParentTop="true"
android:background="@android:color/transparent">
</android.support.design.widget.CoordinatorLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:itemIconTint="#333"
app:itemTextColor="#333"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="@style/ThemeOverlay.AppCompat.Dark"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
</android.support.design.widget.AppBarLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_below="@id/appbar"
android:layout_gravity="bottom">
<TextView
android:layout_width="match_parent"
android:layout_height="30dp"
android:id="@+id/tv_top"
android:text="Layout Top"
android:gravity="center"
android:textSize="15sp"
android:textColor="@android:color/white"
android:layout_alignParentTop="true"
android:background="@color/colorAccent">
</TextView>
<!-- Coordinator Layout used to position the SnackBar -->
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cl1"
android:rotation="180"
android:layout_below="@id/tv_top"
android:background="@android:color/transparent">
</android.support.design.widget.CoordinatorLayout>
<!-- Coordinator Layout used to position the SnackBar -->
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cl2"
android:paddingBottom="75dp"
android:layout_centerInParent="true"
android:background="@android:color/transparent">
</android.support.design.widget.CoordinatorLayout>
<!-- Coordinator Layout used to position the SnackBar -->
<TextView
android:layout_width="match_parent"
android:layout_height="30dp"
android:id="@+id/tv_center"
android:text="Center"
android:gravity="center"
android:textSize="15sp"
android:layout_centerInParent="true"
android:textColor="@android:color/white"
android:background="@color/colorAccent">
</TextView>
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cl3"
android:rotation="180"
android:paddingBottom="75dp"
android:layout_centerInParent="true"
android:background="@android:color/transparent">
</android.support.design.widget.CoordinatorLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="30dp"
android:id="@+id/tv_bottom"
android:text="Layout Bottom"
android:gravity="center"
android:textSize="15sp"
android:textColor="@android:color/white"
android:layout_alignParentBottom="true"
android:background="@color/colorAccent">
</TextView>
<!-- Coordinator Layout used to position the SnackBar -->
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cl4"
android:layout_above="@id/tv_bottom"
android:background="@android:color/transparent">
</android.support.design.widget.CoordinatorLayout>
</RelativeLayout>
</RelativeLayout>
</RelativeLayout>
6) 结果：
上述组合解决方案：
final ViewGroup.LayoutParams params = snackbar.getView().getLayoutParams();
if (params instanceof CoordinatorLayout.LayoutParams) {
((CoordinatorLayout.LayoutParams) params).gravity = Gravity.TOP;
} else {
((FrameLayout.LayoutParams) params).gravity = Gravity.TOP;
}
snackbar.getView().setLayoutParams(params);
仍然受到不当动画的困扰。
这使得 Snackbar 出现在顶部，而没有奇怪的幻灯片过渡。
Kotlin 中最简单的解决方案：
val snackbar = Snackbar.make(view, string, Snackbar.LENGTH_LONG)
val layoutParams = LayoutParams(snackbar.view.layoutParams)
layoutParams.gravity = Gravity.TOP
snackbar.view.setPadding(0, 10, 0, 0)
snackbar.view.layoutParams = layoutParams
snackbar.animationMode = BaseTransientBottomBar.ANIMATION_MODE_FADE
snackbar.show()
在显示 Snackbar 之前，请添加以下代码
View snackbarView = snackbar.getView();
FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) snackbarView.getLayoutParams();
params.gravity = Gravity.TOP;
snackbarView.setLayoutParams(params);
snackbarView.startAnimation(AnimationUtils.loadAnimation(host, R.anim.slide_in_snack_bar));
当dismiss()
View snackbarView = snackbar.getView();
snackbarView.startAnimation(AnimationUtils.loadAnimation(_snackbar.getContext(), R.anim.slide_out_snack_bar));
snackbar.dismiss()
slide_in_snack_bar.xml
<translate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="@android:integer/config_longAnimTime"
android:fromYDelta="-100%p"
android:toYDelta="0%p" />
slide_out_snack_bar.xml
<translate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="@android:integer/config_longAnimTime"
android:fromYDelta="0%p"
android:toYDelta="-100%p" />
如果您使用Constraintlayoutas作为根父级，在指南的帮助下，CoordinatorLayout 您可以尝试以下操作：
在 Guideline 中更改： layout_constraintGuide_end="Your bottom margin value" 的值，如下例所示。
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:id="@+id/coordinator"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toBottomOf="@id/guideline3" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_end="150dp" />
在活动中，您可以将 CoordinatorLayout 作为快餐栏的视图传递
mSnackBar = Snackbar.make(
coordinator,
getString(R.string.no_internet_connection),
Snackbar.LENGTH_INDEFINITE
)
mSnackBar.show()
2年后，这是我的解决方案..
设置顶部和底部边距会更改效果结果，... 我已尝试添加尽可能多的自定义选项，覆盖动画是另一个未在此处编写的选项。
感谢大家对几个问题的回答...
{
// usage for setSnackBar
int view = R.id.toolbar;
String snackMessage = "";
boolean useAction = false;
Runnable ifUseActionRunnable = null;
String actionText = "";
int leftMargin = 0;
int topMargin = 0;
int rightMargin = 0;
int bottomMargin = 0;
int backgroundColour = Color.BLACK;
int textColor = Color.WHITE;
int duration = Snackbar.LENGTH_LONG;
setSnackBar(view, snackMessage, useAction, ifUseActionRunnable, actionText, leftMargin, topMargin, rightMargin, bottomMargin, backgroundColour, textColor, duration);
}
Snackbar snb;
public void setSnackBar(int targetView, String snackMessage, boolean useAction, final Runnable ifUseActionRunnable, String actionText , int leftMargin, int topMargin, int rightMargin, int bottomMargin, int backgroundColour, int textColor, int duration)
{
snb = Snackbar.make(findViewById(targetView), snackMessage, duration);
View view = snb.getView();
view.setBackgroundColor(backgroundColour);
snb.setActionTextColor(textColor);
FrameLayout.LayoutParams params =(FrameLayout.LayoutParams)view.getLayoutParams();
params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.TOP;
params.setMargins(leftMargin, topMargin, rightMargin, bottomMargin);
view.setLayoutParams(params);
if (useAction)
{
snb.setAction(actionText, new View.OnClickListener(){
@Override
public void onClick(View p1)
{
ifUseActionRunnable.run();
}
});
}
if (snb.isShown())
{
snb.dismiss();
snb.show();
}
else
{
snb.show();
}
}
为什么不将其锚定到其他视图说您在布局中有其他视图只需将小吃栏锚定到某个视图以便它显示在那里例如：
<LinearLayout>
......<Button>
<LinearLayout>
<TextView>
</LinearLayout>
</LinearLayout>
在代码中：
Snackbar snackbar = Snackbar.make(view,message, snackbar.LENGTH_SHORT).setAnchorView(R.id.reg_button);
R.id.reg_button 是布局中的按钮，它可以在任何地方，小吃栏会在那里显示不需要使用任何框架等应用程序将按预期运行不会崩溃
在屏幕顶部显示 Snackbar (kotlin)
// Custom snackbar : banner model
val customSnackBar = Snackbar.make(snackbar_id, "", Snackbar.LENGTH_INDEFINITE)
val view = customSnackBar.view
val params = view.layoutParams as CoordinatorLayout.LayoutParams
params.gravity = Gravity.TOP
view.layoutParams = params
val layout = customSnackBar.view as Snackbar.SnackbarLayout
val customSnackView = layoutInflater.inflate(R.layout.snackbar_banner, null)
val actionButton1 = customSnackView.findViewById(R.id.action_button_1) as MaterialButton
actionButton1.setOnClickListener {
customSnackBar.dismiss()
}
val actionButton = customSnackView.findViewById(R.id.action_button_2) as MaterialButton
actionButton.setOnClickListener {
customSnackBar.dismiss()
}
// We can also customize the above controls
layout.setPadding(0, 0, 0, 0)
layout.addView(customSnackView, 0)
customSnackBar.show()
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="@android:color/white"
>
<TextView
android:padding="16dp"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/snackbar_banner_message"
android:textColor="@android:color/black"
android:textSize="16sp" />
<LinearLayout
android:gravity="end"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:orientation="horizontal">
<com.google.android.material.button.MaterialButton
android:id="@+id/action_button_1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_weight="1"
android:background="@android:color/black"
android:text="Close"
style="@style/Widget.MaterialComponents.Button.TextButton"
/>
<com.google.android.material.button.MaterialButton
android:id="@+id/action_button_2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@android:color/black"
android:text="Fix it"
android:textStyle="bold"
style="@style/Widget.MaterialComponents.Button.TextButton"
/>
</LinearLayout>
</LinearLayout>
