Android Toast工具类：ToastUtil

最新推荐文章于 2025-07-01 11:53:09 发布

原创最新推荐文章于 2025-07-01 11:53:09 发布 · 9.4k 阅读

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文章标签：

#Android #Toast #ToastUtil

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本文介绍了一种在Android应用中控制Toast显示位置(底部、中部、顶部)及显示时间(短时间、长时间)的方法。通过创建ToastUtil工具类，实现了Toast消息的灵活展示，无论调用多少次，都只显示一次，避免了Toast频繁弹出的问题。

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import android.view.Gravity;
import android.widget.Toast;






public class ToastUtil {

    private static Toast toast;//实现不管我们触发多少次Toast调用，都只会持续一次Toast显示的时长

    /**
     * 短时间显示Toast【居下】
     * @param msg 显示的内容-字符串*/
    public static void showShortToast(String msg) {
        if(ApplicationController.getInstance() != null){
            if (toast == null) {
                toast = Toast.makeText(ApplicationController.getInstance(), msg, Toast.LENGTH_SHORT);
            } else {
                toast.setText(msg);
            }
            toast.show();
        }
    }
    /**
     * 短时间显示Toast【居中】
     * @param msg 显示的内容-字符串*/
    public static void showShortToastCenter(String msg){
        if(ApplicationController.getInstance() != null) {
            if (toast == null) {
                toast = Toast.makeText(ApplicationController.getInstance(), msg, Toast.LENGTH_SHORT);
                toast.setGravity(Gravity.CENTER, 0, 0);
            } else {
                toast.setText(msg);
            }
            toast.show();
        }
    }

    /**
     * 短时间显示Toast【居上】
     * @param msg 显示的内容-字符串*/
    public static void showShortToastTop(String msg){
        if(ApplicationController.getInstance() != null) {
            if (toast == null) {
                toast = Toast.makeText(ApplicationController.getInstance(), msg, Toast.LENGTH_SHORT);
                toast.setGravity(Gravity.TOP, 0, 0);
            } else {
                toast.setText(msg);
            }
            toast.show();
        }
    }

    /**
     * 长时间显示Toast【居下】
     * @param msg 显示的内容-字符串*/
    public static void showLongToast(String msg) {
        if(ApplicationController.getInstance() != null) {
            if (toast == null) {
                toast = Toast.makeText(ApplicationController.getInstance(), msg, Toast.LENGTH_LONG);
            } else {
                toast.setText(msg);
            }
            toast.show();
        }
    }
    /**
     * 长时间显示Toast【居中】
     * @param msg 显示的内容-字符串*/
    public static void showLongToastCenter(String msg){
        if(ApplicationController.getInstance() != null) {
            if (toast == null) {
                toast = Toast.makeText(ApplicationController.getInstance(), msg, Toast.LENGTH_LONG);
                toast.setGravity(Gravity.CENTER, 0, 0);
            } else {
                toast.setText(msg);
            }
            toast.show();
        }
    }
    /**
     * 长时间显示Toast【居上】
     * @param msg 显示的内容-字符串*/
    public static void showLongToastTop(String msg){
        if(ApplicationController.getInstance() != null) {
            if (toast == null) {
                toast = Toast.makeText(ApplicationController.getInstance(), msg, Toast.LENGTH_LONG);
                toast.setGravity(Gravity.TOP, 0, 0);
            } else {
                toast.setText(msg);
            }
            toast.show();
        }
    }
}