自定义Toast

我相信你一定会用系统自带的Toast，否则你就不会看到这篇文章了。正是由于系统自带的（往往是显示在屏幕的底部）很多时候并不能满足我们的需求所以才需要自定义。好了不多说直接看代码吧。
首先是自定义的工具类

public class ToastUtil {

    private Toast mToast;
    private TextView mTextView;
    private TimeCount timeCount;
    private String message;
    private Handler mHandler = new Handler();
    private boolean canceled = true;

    public ToastUtil(Context context, int layoutId, String msg) {
        message = msg;
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        //自定义布局
        View view = inflater.inflate(layoutId, null);
        //自定义toast文本
        mTextView = (TextView) view.findViewById(R.id.toast_msg);
        mTextView.setText(msg);
        Log.i("ToastUtil", "Toast start...");
        if (mToast == null) {
            mToast = new Toast(context);
            Log.i("ToastUtil", "Toast create...");
        }
        //设置toast居中显示
        mToast.setGravity(Gravity.CENTER, 0, 0);
        mToast.setDuration(Toast.LENGTH_LONG);
        mToast.setView(view);
    }

    /**
     * 自定义居中显示toast
     */
    public void show() {
        mToast.show();
        Log.i("ToastUtil", "Toast show...");
    }

    /**
     * 自定义时长、居中显示toast
     *
     * @param duration
     */
    public void show(int duration) {
        timeCount = new TimeCount(duration, 1000);
        Log.i("ToastUtil", "Toast show...");
        if (canceled) {
            timeCount.start();
            canceled = false;
            showUntilCancel();
        }
    }

    /**
     * 隐藏toast
     */
    private void hide() {
        if (mToast != null) {
            mToast.cancel();
        }
        canceled = true;
        Log.i("ToastUtil", "Toast that customed duration hide...");
    }

    private void showUntilCancel() {
        if (canceled) { //如果已经取消显示，就直接return
            return;
        }
        mToast.show();
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                Log.i("ToastUtil", "Toast showUntilCancel...");
                showUntilCancel();
            }
        }, Toast.LENGTH_LONG);
    }

用法也不复杂

 ToastUtil util= new ToastUtil(MainActivity.this,R.layout.toast_short_layout,"Setting successfully");
            util.show();

但是有个小问题 就是你传进来的布局不能只有一个根布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="@dimen/px270dp"
    android:layout_height="@dimen/px80dp"
    android:orientation="vertical"
    android:background="@drawable/toast_bg">

        <TextView
            android:id="@+id/toast_msg"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:textSize="@dimen/px24sp"
            android:textColor="@color/color_ffffff"/>
  
</LinearLayout>

这样是达不到预期效果的。原理嘛 暂时没找到为什么。解决的办法就是暂时先加一层布局就好

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="@dimen/px270dp"
    android:layout_height="@dimen/px80dp"
    android:orientation="vertical"
    android:background="@drawable/toast_bg">
    <RelativeLayout
        android:layout_width="@dimen/px270dp"
        android:layout_height="@dimen/px80dp">
        <TextView
            android:id="@+id/toast_msg"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:textSize="@dimen/px24sp"
            android:textColor="@color/color_ffffff"/>
    </RelativeLayout>
</LinearLayout>

这样就可以了。问题先留在这，等我以后找到了答案再来改写O(∩_∩)O哈哈~