如何自定义snackBar的布局？
God*_*win 85 android android-custom-view android-layout snackbar android-snackbar
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...
Mik*_*ike 138
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();
- 我会谨慎对待这类事情.您永远不知道这些系统类的内部实现细节是否以及何时会发生变化.如果它不能满足您的需求,那么实现您自己的自定义组件会更安全. (12认同)
- 嗨..这对我有用......但我的小吃店的宽度并没有完全伸展 (4认同)
- 从v 25.1.0开始,这成为可能.请查看下面的帖子.谢谢你的回答! (3认同)
Yak*_*pan 61
可以从Android支持库的25.1.0版本开始
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:
- 使用
@dimen/design_snackbar值来匹配材料设计指南. - 用于
?attr/colorAccent将应用程序主题更改应用于Snackbar.
II.扩展BaseTransientBottomBar类.
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.创建实例CustomSnackbar和调用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);
}
}
}
- 这显示了顶部的小吃吧:/ (3认同)
- 我在左右两侧获得边距,因此黑色背景可见.如何删除它？ (2认同)
- @AmirZiarati要从底部显示它,你需要从Snackbar类复制一个私有静态方法.我在回答这个问题时突出了这个方法. (2认同)
- 如何设置透明背景？ (2认同)
Moh*_*abi 25
XML方式:
用于Snackbar此文件的原始布局xml 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,您应该使用与此布局相同的android:ids 编写自己的布局,并且在refs.xml文件中应添加以下行:
<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>
- 这不会拉长宽度。该死的这个机器人!!!! 为什么改变观点一定很痛苦。该死的 ！！ (2认同)
Pri*_*990 16
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.请参阅Google Material设计指南.
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.
aam*_*rya 11
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();
}
});
小智 7
我试过了，它有效！
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
}
});
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