• 安卓Android Support Design Library——Snackbar


    介绍:

      SnackbarAndroid Support Design Library库支持的一个控件,用于在界面下面提示一些关键信息,跟Toast不同的地方是SnackBar允许用户向右滑动消除它,同时,也允许在SnackBar中设定一个Action,当用户点击了SnackBar里面的按钮的时候,可以进行一些操作,所以,功能绝对是很强大的。

      官方推荐使用CoordinatorLayout(另一个Android Support Design Library库支持的控件)容纳。因为使用这个控件,可以保证Snackbar可以让用户通过向右滑动退出。

    由浅入深:

    1、基础功能:从底部弹出snackbar

    在xml文件中定义snackBar的容器:Coordinator容器:

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <Button
            android:onClick="createSnackbar"
            android:text="Snackbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
        <android.support.design.widget.CoordinatorLayout
            android:id="@+id/container"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"/>
    </RelativeLayout>

    activity中显示 Snackbar(它的用法与Toast很像,它出现后三秒之后从底部弹出,或者用户 向右滑动,它被滑出)

    public class SnackbarTest extends AppCompatActivity {
        CoordinatorLayout container;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_snackbar_test);
            container = (CoordinatorLayout) findViewById(R.id.container);
    
        }
        public void createSnackbar(View v){
             Snackbar.make(container,"Snackbar maker", Snackbar.LENGTH_LONG).show();
        }
    }

    Snackbar的第一个容器参数也可以是 LinearLayout或其他容器,当Snackbar弹出时,没有向右滑出效果。

    2、添加按钮,并定义点击事件

    Snackbar.make(container,"Snackbar with button",Snackbar.LENGTH_LONG)
    .setAction("action", new View.OnClickListener() {
    @Override
    public void onClick(View v) {
    //
    }
    })
    .setActionTextColor(Color.RED)
    .show();

    3、设置Snackbar回调 onshow 和 onDismissed

    自定义 Snackbar.Callback 类

    public class MyCallback extends Snackbar.Callback{
        @Override
        public void onDismissed(Snackbar transientBottomBar, int event) {
            super.onDismissed(transientBottomBar, event);
            if(event == DISMISS_EVENT_SWIPE || event == DISMISS_EVENT_TIMEOUT
                    || event == DISMISS_EVENT_CONSECUTIVE){
    
            }
        }
        @Override
        public void onShown(Snackbar sb) {
            super.onShown(sb);
            //
        }
    }

    Snackbar设置callBack()

    Snackbar.make(container,"Snackbar maker", Snackbar.LENGTH_LONG)
            .setCallback(new MyCallback())
            .show();

    补充Snackbar消失的类型:

    /** Indicates that the Snackbar was dismissed via a swipe.*/
    public static final int DISMISS_EVENT_SWIPE = 0;
    /** Indicates that the Snackbar was dismissed via an action click.*/
    public static final int DISMISS_EVENT_ACTION = 1;
    /** Indicates that the Snackbar was dismissed via a timeout.*/
    public static final int DISMISS_EVENT_TIMEOUT = 2;
    /** Indicates that the Snackbar was dismissed via a call to {@link #dismiss()}.*/
    public static final int DISMISS_EVENT_MANUAL = 3;
    /** Indicates that the Snackbar was dismissed from a new Snackbar being shown.*/
    public static final int DISMISS_EVENT_CONSECUTIVE = 4;

    后续查看补充:

    http://www.jianshu.com/p/cd1e80e64311

    Coordinator 容器:

    http://www.jianshu.com/p/488283f74e69

    http://www.cnblogs.com/itgungnir/p/6210803.html

  • 相关阅读:
    flashplayer关闭休眠模式
    大道至简,职场上做人做事做管理[转一下]
    flash程序员对python中while True的理解
    github搭建个人主页
    flash素材在as程序中使用的几种方法
    python中解析xml文档转化成字符串的方法
    查看修改mysql编码方式
    FusionCharts
    extJSjson字符串和json对象
    我的收藏
  • 原文地址:https://www.cnblogs.com/NeilZhang/p/7417682.html
Copyright © 2020-2023  润新知