如何自定义snackBar 的布局？

Question

有什么方法可以将snackBar的布局改为自定义View吗？

现在它变成黑色了，我们可以更改背景颜色。 但我不知道如何为新布局充气并将其作为snackBars 背景的正确方法？

谢谢...

Answer 1

Snackbar 不允许您设置自定义布局。但是，正如 Primoz990 建议的那样，您可以获得 Snackbar 的视图。 getView 函数返回 Snackbar.SnackbarLayout，它是一个水平 LinearLayout 对象，其子对象是一个 TextView 和一个 Button。要将自己的 View 添加到 Snackbar，您只需隐藏 TextView，并将您的 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();

Answer 2

可以从25.1.0 revision of Android Support Library开始

我。在你的 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。
• 使用 ?attr/colorAccent 将您的应用程序主题更改应用到 Snackbar。

二。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);
}
}

三。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);
  }
}
}

四。添加方法以创建具有自定义布局的 Snackbar 和填充它的方法。

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 上查看更多关于 Snackbar 及其定制的信息

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);
        }
    }
}

Answer 3

XML方式：

用于Snackbar 的原始布局xml 文件是这个文件：

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:ids 和您的refs.xml 文件编写您自己的布局，您应该添加这一行：

<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>

Answer 4

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Activity的onCreate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();
                }
            });

Answer 5

答案是：不要自定义 Snackbar。它不应包含比短文本和一个动作更多的元素。见Google Material design guidelines。

更新： 如果您仍然想自定义 Snackbar，这是我在我的应用中实现的：

//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，您可以以编程方式将新视图添加到 Snackbar。

Answer 6

我试过了，效果很好！

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
    }
});

Answer 7

试试下面的代码。

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。

Answer 8

要添加到 Yakiv Mospan 的答案中，要使您的自定义 BaseTransientBottomBar 从底部显示为 Snackbar，请从 Snackbar 类中复制此方法以在 BaseTransientBottomBar 构造函数中找到合适的父级。

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;
}

Answer 9

接受答案的 Kotlin 版本：https://stackoverflow.com/a/33441214/2437655

 private fun showSnackbar() {
        val snackbar = Snackbar.make(
                binding.root,
                "",
                Snackbar.LENGTH_INDEFINITE
        )
        (snackbar.view as Snackbar.SnackbarLayout).apply {
            findViewById<View>(R.id.snackbar_text).visibility = View.INVISIBLE
            findViewById<View>(R.id.snackbar_action).visibility = View.INVISIBLE
            val snackbarBinding = DataBindingUtil.inflate<SnackbarBinding>(
                    LayoutInflater.from(this@SnackbarActivity),
                    R.layout.snackbar,
                    binding.root as ViewGroup,
                    false
            )
            setPadding(0, 0, 0, 0)
            addView(snackbarBinding.root, 0)
        }
        snackbar.setDuration(8000).show()
    }

Answer 10

这是我用于 kotlin 的 util 类代码： https://gist.github.com/Ryszardenko/db429bc7d177e646ffe27e0672a0958c#file-customsnackbar-kt

class CustomSnackbar(private val view: View) {

    fun showSnackBar(title: String, cancelFun: () -> Unit = {}) {
        val snackView = View.inflate(view.context, R.layout.snackbar, null)
        val binding = SnackbarBinding.bind(snackView)
        val snackbar = Snackbar.make(view, "", Snackbar.LENGTH_LONG)
        (snackbar.view as ViewGroup).removeAllViews()
        (snackbar.view as ViewGroup).addView(binding.root)
        snackbar.view.setPadding(0, 0, 0, 0)
        snackbar.view.elevation = 0f
        snackbar.setBackgroundTint(
            ContextCompat.getColor(
                view.context,
                android.R.color.transparent
            )
        )
        binding.tvTitle.text = title
        binding.btnCancel.setOnClickListener {
            cancelFun()
            snackbar.dismiss()
        }
        snackbar.show()
    }
}

cancelFun() 是一个 lambda，默认情况下为空 - 您可以将其传递给例如“撤消”函数。

Answer 11

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();

目前自定义布局的唯一问题是，我们需要在 dp 中传递视图高度作为输入