布局文件:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="match_parent"
    android:layout_width="fill_parent"
    >
    <LinearLayout
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:id="@+id/mbContainer"
    android:layout_alignParentBottom="true"
    >        <TextView  android:id="@+id/mbMessage"
     android:layout_width="fill_parent"
        android:layout_height="36.6dp"
        android:textColor="@color/account_text_white"
        android:textSize="13.3dp"
        android:background="@color/account_btn_black"
        android:alpha="0.7"
        android:gravity="center"
        />
</LinearLayout>
</RelativeLayout>代码:
public static MessageBar initView(Context context, CharSequence text,
            int duration)
    {
        MessageBar result = new MessageBar(context);
        result.setMargin(0, 0);
        LayoutInflater inflate = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = inflate.inflate(R.layout.mb_messagebar, null);
        TextView tv = (TextView) v.findViewById(R.id.mbMessage);
        tv.setText(text);
        result.setView(v);
        result.setDuration(duration);
        return result;
    }自定义toastAndroid布局