有没有方法可以将snackBar的布局更改为自定义View?
现在它变黑了,我们可以改变背景颜色。但我不知道正确的方法来膨胀新的布局并使其成为snackBars背景?
谢谢...
Snackbar不允许您设置自定义布局。但是,正如Primoz990建议您可以获得Snackbar的视图。 getView函数返回Snackbar.SnackbarLayout,它是一个水平的LinearLayout对象,其子对象是TextView和Button。要将自己的View添加到Snackbar,只需隐藏TextView,并将View添加到Snackbar.SnackbarLayout。
// Create the Snackbar
Snackbar snackbar = Snackbar.make(containerLayout, "", Snackbar.LENGTH_LONG);
// Get the Snackbar's layout view
Snackbar.SnackbarLayout layout = (Snackbar.SnackbarLayout) snackbar.getView();
// Hide the text
TextView textView = (TextView) layout.findViewById(android.support.design.R.id.snackbar_text);
textView.setVisibility(View.INVISIBLE);
// Inflate our custom view
View snackView = mInflater.inflate(R.layout.my_snackbar, null);
// Configure the view
ImageView imageView = (ImageView) snackView.findViewById(R.id.image);
imageView.setImageBitmap(image);
TextView textViewTop = (TextView) snackView.findViewById(R.id.text);
textViewTop.setText(text);
textViewTop.setTextColor(Color.WHITE);
//If the view is not covering the whole snackbar layout, add this line
layout.setPadding(0,0,0,0);
// Add the view to the Snackbar's layout
layout.addView(snackView, 0);
// Show the Snackbar
snackbar.show();
它可以从25.1.0 revision of Android Support Library开始
I.在您的values / layout文件夹中声明自定义布局。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/snackbar_action"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/design_snackbar_extra_spacing_horizontal"
android:layout_marginStart="@dimen/design_snackbar_extra_spacing_horizontal"
android:layout_gravity="center_vertical|right|end"
android:paddingTop="@dimen/design_snackbar_padding_vertical"
android:paddingBottom="@dimen/design_snackbar_padding_vertical"
android:paddingLeft="@dimen/design_snackbar_padding_horizontal"
android:paddingRight="@dimen/design_snackbar_padding_horizontal"
android:visibility="gone"
android:textColor="?attr/colorAccent"
style="?attr/borderlessButtonStyle"/>
<TextView
android:gravity="center_vertical|right"
android:id="@+id/snackbar_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:paddingTop="@dimen/design_snackbar_padding_vertical"
android:paddingBottom="@dimen/design_snackbar_padding_vertical"
android:paddingLeft="@dimen/design_snackbar_padding_horizontal"
android:paddingRight="@dimen/design_snackbar_padding_horizontal"
android:textAppearance="@style/TextAppearance.Design.Snackbar.Message"
android:maxLines="@integer/design_snackbar_text_max_lines"
android:layout_gravity="center_vertical|left|start"
android:ellipsize="end"/>
</LinearLayout>
提示:
@dimen/design_snackbar
值来匹配材料设计指南。?attr/colorAccent
将应用程序主题更改应用于Snackbar。II。扩展BaseTransientBottomBar课程。
public class final CustomSnackbar extends BaseTransientBottomBar<CustomSnackbar> {
/**
* Constructor for the transient bottom bar.
*
* @param parent The parent for this transient bottom bar.
* @param content The content view for this transient bottom bar.
* @param contentViewCallback The content view callback for this transient bottom bar.
*/
private CustomSnackbar(ViewGroup parent, View content,
ContentViewCallback contentViewCallback) {
super(parent, content, contentViewCallback);
}
}
III。添加BaseTransientBottomBar.ContentViewCallback
public class final CustomSnackbar ...{
...
private static class ContentViewCallback implements
BaseTransientBottomBar.ContentViewCallback {
// view inflated from custom layout
private View content;
public ContentViewCallback(View content) {
this.content = content;
}
@Override
public void animateContentIn(int delay, int duration) {
// add custom *in animations for your views
// e.g. original snackbar uses alpha animation, from 0 to 1
ViewCompat.setScaleY(content, 0f);
ViewCompat.animate(content)
.scaleY(1f).setDuration(duration)
.setStartDelay(delay);
}
@Override
public void animateContentOut(int delay, int duration) {
// add custom *out animations for your views
// e.g. original snackbar uses alpha animation, from 1 to 0
ViewCompat.setScaleY(content, 1f);
ViewCompat.animate(content)
.scaleY(0f)
.setDuration(duration)
.setStartDelay(delay);
}
}
}
IV。使用自定义布局和方法创建Snackbar的Add方法来填充它。
public class final CustomSnackbar ...{
...
public static CustomSnackbar make(ViewGroup parent, @Duration int duration) {
// inflate custom layout
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View content = inflater.inflate(R.layout.snackbar_view, parent, false);
// create snackbar with custom view
ContentViewCallback callback= new ContentViewCallback(content);
CustomSnackbar customSnackbar = new CustomSnackbar(parent, content, callback);
// Remove black background padding on left and right
customSnackbar.getView().setPadding(0, 0, 0, 0);
// set snackbar duration
customSnackbar.setDuration(duration);
return customSnackbar;
}
// set text in custom layout
public CustomSnackbar setText(CharSequence text) {
TextView textView = (TextView) getView().findViewById(R.id.snackbar_text);
textView.setText(text);
return this;
}
// set action in custom layout
public CustomSnackbar setAction(CharSequence text, final OnClickListener listener) {
Button actionView = (Button) getView().findViewById(R.id.snackbar_action);
actionView.setText(text);
actionView.setVisibility(View.VISIBLE);
actionView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
listener.onClick(view);
// Now dismiss the Snackbar
dismiss();
}
});
return this;
}
}
V.创建CustomSnackbar
的实例并调用show()
方法。
CustomSnackbar customSnackbar = CustomSnackbar.make(rooView, CustomSnackbar.LENGTH_INDEFINITE);
customSnackbar.setText("No network connection!");
customSnackbar.setAction("Retry", new View.OnClickListener() {
@Override
public void onClick(View v) {
// handle click here
}
});
customSnackbar.show();
在materialdoc.com上查看有关Snackbar及其自定义的更多信息
完整的CustomSnackbar.class
代码:
import android.support.annotation.NonNull;
import android.support.design.widget.BaseTransientBottomBar;
import android.support.v4.view.ViewCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
public class CustomSnackbar extends BaseTransientBottomBar<CustomSnackbar> {
/**
* Constructor for the transient bottom bar.
*
* @param parent The parent for this transient bottom bar.
* @param content The content view for this transient bottom bar.
* @param callback The content view callback for this transient bottom bar.
*/
private CustomSnackbar(ViewGroup parent, View content, ContentViewCallback callback) {
super(parent, content, callback);
}
public static CustomSnackbar make(@NonNull ViewGroup parent, @Duration int duration) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View content = inflater.inflate(R.layout.snackbar_view, parent, false);
final ContentViewCallback viewCallback = new ContentViewCallback(content);
final CustomSnackbar customSnackbar = new CustomSnackbar(parent, content, viewCallback);
customSnackbar.getView().setPadding(0, 0, 0, 0);
customSnackbar.setDuration(duration);
return customSnackbar;
}
public CustomSnackbar setText(CharSequence text) {
TextView textView = (TextView) getView().findViewById(R.id.snackbar_text);
textView.setText(text);
return this;
}
public CustomSnackbar setAction(CharSequence text, final View.OnClickListener listener) {
Button actionView = (Button) getView().findViewById(R.id.snackbar_action);
actionView.setText(text);
actionView.setVisibility(View.VISIBLE);
actionView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
listener.onClick(view);
// Now dismiss the Snackbar
dismiss();
}
});
return this;
}
private static class ContentViewCallback implements BaseTransientBottomBar.ContentViewCallback {
private View content;
public ContentViewCallback(View content) {
this.content = content;
}
@Override
public void animateContentIn(int delay, int duration) {
ViewCompat.setScaleY(content, 0f);
ViewCompat.animate(content).scaleY(1f).setDuration(duration).setStartDelay(delay);
}
@Override
public void animateContentOut(int delay, int duration) {
ViewCompat.setScaleY(content, 1f);
ViewCompat.animate(content).scaleY(0f).setDuration(duration).setStartDelay(delay);
}
}
}
用于Snackbar
的原始布局xml文件是此文件:
design_layout_snackbar_include.xml
:<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:id="@+id/snackbar_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
...
android:ellipsize="end"/>
<Button
android:id="@+id/snackbar_action"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
...
android:textColor="?attr/colorAccent"
style="?attr/borderlessButtonStyle"/>
</merge>
因此,为了覆盖此布局,您应该使用与此相同的android:id
s编写自己的布局,并在refs.xml
文件中添加以下行:
<resources xmlns:tools="http://schemas.android.com/tools">
....
<item name="design_layout_snackbar_include" tools:override="true" type="layout">
@layout/my_layout_snackbar
</item>
....
</resources>
答案是:不要自定义Snackbar。除了短文本和一个动作之外,它不应包含任何其他元素。见Google Material design guidelines。
更新:如果你想要自定义Snackbar这是我在我的应用程序中实现的:
//generate the snackbar
Snackbar sb = Snackbar.make(rootView, snack.text, duration);
//set te action button text color
sb.setActionTextColor(mCurrentActivity.getResources().getColor(R.color.snack_text_action));
//Get the view of the snackbar
View sbView = sb.getView();
//set background color
sbView.setBackgroundColor(mCurrentActivity.getResources().getColor(backgroudResId));
//Get the textview of the snackbar text
TextView textView = (TextView) sbView.findViewById(android.support.design.R.id.snackbar_text);
//set text color
textView.setTextColor(mCurrentActivity.getResources().getColor(R.color.snack_text));
//increase max lines of text in snackbar. default is 2.
textView.setMaxLines(10);
我从未尝试过,但是通过获取Snackbar的根视图,您可以以编程方式向Snackbar添加新视图。
private Snackbar showSnackbar(CoordinatorLayout coordinatorLayout, int duration) { // Create the Snackbar
Snackbar snackbar = Snackbar.make(coordinatorLayout, "", duration);
// 15 is margin from all the sides for snackbar
int marginFromSides = 15;
float height = 100;
//inflate view
View snackView = getLayoutInflater().inflate(R.layout.snackbar_layout, null);
// White background
snackbar.getView().setBackgroundColor(Color.WHITE);
// for rounded edges
snackbar.getView().setBackground(getResources().getDrawable(R.drawable.round_edges));
Snackbar.SnackbarLayout snackBarView = (Snackbar.SnackbarLayout) snackbar.getView();
FrameLayout.LayoutParams parentParams = (FrameLayout.LayoutParams) snackBarView.getLayoutParams();
parentParams.setMargins(marginFromSides, 0, marginFromSides, marginFromSides);
parentParams.height = (int) height;
parentParams.width = FrameLayout.LayoutParams.MATCH_PARENT;
snackBarView.setLayoutParams(parentParams);
snackBarView.addView(snackView, 0);
return snackbar;
}
在onCreate of the Activity中:
CoordinatorLayout coordinatorLayout = findViewById(R.id.coordinator_layout);
final Snackbar snackbar = showSnackbar(coordinatorLayout, Snackbar.LENGTH_LONG);
snackbar.show();
View view = snackbar.getView();
TextView tv = (TextView) view.findViewById(R.id.snackbar_action);
tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
snackbar.dismiss();
}
});
我尝试了它,它的工作原理!
View custom = LayoutInflater.from(this).inflate(R.layout.custom_view, null);
snackbar.getView().setPadding(0,0,0,0);
((ViewGroup) snackbar.getView()).removeAllViews();
((ViewGroup) snackbar.getView()).addView(custom);
TextView textView = custom.findViewById(R.id.text);
View button = custom.findViewById(R.id.button);
textView.setText("Your text here");
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// do something
}
});
请尝试以下代码。
Snackbar snackbar = Snackbar.make(container, "No Internet Connection", Snackbar.LENGTH_LONG);
View sbView = snackbar.getView();
sbView.setBackgroundColor(ContextCompat.getColor(this, R.color.colorPrimary));
snackbar.show();
注意:
容器 - 布局的父视图。
要添加到Yakiv Mospan的答案,要使你的自定义BaseTransientBottomBar
从底部像Snackbar
一样展示,请从Snackbar
类中复制此方法,以便为BaseTransientBottomBar
构造函数找到合适的父级。
private static ViewGroup findSuitableParent(View view) {
ViewGroup fallback = null;
do {
if (view instanceof CoordinatorLayout) {
// We've found a CoordinatorLayout, use it
return (ViewGroup) view;
} else if (view instanceof FrameLayout) {
if (view.getId() == android.R.id.content) {
// If we've hit the decor content view, then we didn't find a CoL in the
// hierarchy, so use it.
return (ViewGroup) view;
} else {
// It's not the content view but we'll use it as our fallback
fallback = (ViewGroup) view;
}
}
if (view != null) {
// Else, we will loop and crawl up the view hierarchy and try to find a parent
final ViewParent parent = view.getParent();
view = parent instanceof View ? (View) parent : null;
}
} while (view != null);
// If we reach here then we didn't find a CoL or a suitable content view so we'll fallback
return fallback;
}
你可以试试这个库。这是android默认快餐栏的包装器。 https://github.com/ChathuraHettiarachchi/CSnackBar
Snackbar.with(this,null)
.type(Type.SUCCESS)
.message("Profile updated successfully!")
.duration(Duration.SHORT)
.show();
或者您甚至可以使用自己的视图,
View view = getLayoutInflater().inflate(R.layout.custom_view, null);
Snackbar.with(this,null)
.type(Type.UPDATE)
.contentView(view, 76)
.duration(Duration.SHORT)
.show();
目前只有自定义布局问题,我们需要在dp中传递视图高度作为输入