用Toast显示自定义的view
1. 布局文件 l
具体的代码如下：
<RelativeLayout xmlns:android="schemas.android/apk/res/android"
    xmlns:tools="schemas.android/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.st.cgq.MainActivity"
    android:background="#fff000">
<TextView
        android:id="@+id/title_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world"
        android:layout_alignParentLeft="true"/>
        <ScrollView
            android:id="@+id/scrollView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/title_tv" >
      <LinearLayout
        android:id="@+id/all_ll"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
     
              <TextView
        android:id="@+id/name_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
                     
            </LinearLayout>
        </ScrollView>
</RelativeLayout>
2. 设置显示自定义view的代码：
public class ToastUntils {
   
    public static void showToast(Context mContext,String value){
        View view= LayoutInflater.from(mContext).inflate(R.layout.toast_view, null);
        TextView tvTextView=(TextView)view.findViewById(R.id.name_tv);
       
        tvTextView.setText(value);
        Toast toast=new Toast(mContext);
        toast.setView(view);
        toast.setGravity(Gravity.CENTER, 0, 0);
        toast.show();
    }
}
3. 调用过程：
    ToastUntils.showToast(MainActivity.this,”要显示的内容”);
4. Toast 源码解析：
Toast 的构造防范如下
public Toast(Context context) {
        mContext = context;
        mTN = new TN();
        mTN.mY = context.getResources().getDimensionPixelSize(
                com.android.internal.ast_y_offset);
        mTN.mGravity = context.getResources().getInteger(
                com.android.internal.fig_toastDefaultGravity);
    }
   
android layout布局
Toast设置自定义view
    /**
    * Set the view to show.
    * @see #getView
    */
    public void setView(View view) {
        mNextView = view;
    }
显示的位置
    /**
    * Set the location at which the notification should appear on the screen.
    * @see android.view.Gravity
    * @see #getGravity
    */
    public void setGravity(int gravity, int xOffset, int yOffset) {
        mTN.mGravity = gravity;
        mTN.mX = xOffset;
        mTN.mY = yOffset;
}
常见的toast调用的方法：
    /**
    * Make a standard toast that just contains a text view.
    *
    * @param context  The context to use.  Usually your {@link android.app.Application}
    *                or {@link android.app.Activity} object.
    * @param text    The text to show.  Can be formatted text.
    * @param duration How long to display the message.  Either {@link #LENGTH_SHORT} or
    *                {@link #LENGTH_LONG}
    *
    */
    public static Toast makeText(Context context, CharSequence text, @Duration int duration) {
        Toast result = new Toast(context);
        LayoutInflater inflate = (LayoutInflater)
                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = inflate.inflate(com.android.internal.ansient_notification, null);
        TextView tv = (TextView)v.findViewById(com.android.internal.ssage);
        tv.setText(text);
       
        result.mNextView = v;
        result.mDuration = duration;
        return result;
    }
    /**
    * Make a standard toast that just contains a text view with the text from a resource.
    *
    * @param context  The context to use.  Usually your {@link android.app.Application}
    *                or {@link android.app.Activity} object.
    * @param resId    The resource id of the string resource to use.  Can be formatted text.
    * @param duration How long to display the message.  Either {@link #LENGTH_SHORT} or