Android默认ToastAndroid默认Toast只是一个简单的黑框框，有时觉得太单调了，不如自己实现一套较精致，不一样的Toast。
先看下效果（动图可能有点大）：
前四个是不同类型的Toast，第五个是个loading框。它们两者实现方式不同，分别进行讲解
不一样的Toast
Toast其实并不一定要是在底部弹出的黑色小框框，它也自定义不同的样式
自定义显示位置
toast的显示位置可以通过 方法setGravity(int gravity, int xOffset, int yOffset)来设置，
参数1是位置有Gravity.BOTTOM，Gravity.CENTER，Gravity.CENTER_HORIZONTAL等，参数2,3是相对于x轴，y轴的偏移量，单位为pix，如果想设置为一定数量dp，可以用以下方法将dp转换为pix
final float scale = getContext().getResources().getDisplayMetrics().density;
int pixels = (int) (dps * scale + 0.5f);
或者
TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 65, getResources().getDisplayMetrics());
比如来显示一个相对于屏幕中心x偏上100pix的toast
Toast toast=Toast.makeText(this, "啦啦啦~",Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER,0,-100);
toast.show();
加个图标
Toast toast = Toast.makeText(getApplicationContext(),
"带图片的Toast", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
LinearLayout llToast = (LinearLayout) toast.getView();
ImageView ivIcon = new ImageView(getApplicationContext());
ivIcon.setImageResource(R.drawable.ic_info);
llToast.addView(ivIcon, 0);
toast.show();
完全自定义
Toast toast=Toast.makeText(this, "完全不一样", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER,0,0);
View v= getLayoutInflater().inflate(R.layout.toast,null);
toast.setView(v);
toast.show();
toast.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg_toast">
<ImageView
android:id="@+id/iv_icon"
android:layout_width="@dimen/toast_icon_size"
android:layout_height="@dimen/toast_icon_size"
android:src="@drawable/ic_info"/>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/toast_text"
android:maxEms="12"
android:layout_marginTop="@dimen/s_small_spacing"
android:textSize="@dimen/sub_medium_text"/>
</LinearLayout>
效果就是开头动图里面前四种
同样式的loading
loading框的话显示时间不固定，不能用toast来实现，应为它只能显示1.5s或3s，那就用dialog来实现它，这里有一点要注意，就是背景如何做到半透明，并且大小合适
View view=LayoutInflater.from(context).inflate
(R.layout.toast_loading,null);
TextView tv=view.findViewById(R.id.tv);
tv.setText(text);
AVLoadingIndicatorView avl=view.findViewById(R.id.avl);
avl.setIndicator(getIndicator(context));
avl.show();
dialog=new AlertDialog.Builder(context)
.setView(view)
.setCancelable(false)
.create();
dialog.show();
AVLoadingIndicatorView 是一个loadingView的开源库，有多种样式，这里随机获取一种https://github.com/81813780/AVLoadingIndicatorView
toast_loading.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg_toast_loading">
<com.wang.avi.AVLoadingIndicatorView
android:id="@+id/avl"
app:indicatorColor="@color/toast_text"
app:indicatorName="LineScaleIndicator"
android:layout_width="@dimen/toast_icon_size"
android:layout_height="@dimen/toast_icon_size"/>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/toast_text"
android:maxEms="12"
android:layout_marginTop="@dimen/s_small_spacing"
android:textSize="@dimen/sub_medium_text"/>
</LinearLayout>
然而出来的效果
这这效果。。。背景还是纯白，宽度不是wrap_content。这里需要自己写个dialog的theme，如下
<style name="CustomDialog" parent="android:Theme.Dialog">
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">@android:color/transparent</item>
</style>
然后在创建AlertDialog.Builder时传进去
dialog=new AlertDialog.Builder(context,R.style.CustomDialog)
.setView(view)
...
再看效果
封装类
import android.content.Context;
import android.support.v7.app.AlertDialog;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.example.myframe.R;
import com.wang.avi.AVLoadingIndicatorView;
import java.util.Random;
/**
* Author：LvQingYang
* Date：2017/8/18
* Email：biloba12345@gamil.com
* Github：https://github.com/biloba123
*Blog：https://biloba123.github.io/
* Info：
*/
public class MyToast {
private static Toast toast;
private static AlertDialog dialog;
//info toast
public static void info(Context context ,String text, int duration){
showToast(context, R.drawable.ic_info, text, duration);
}
public static void info(Context context ,int textId, int duration){
showToast(context, R.drawable.ic_info,context.getString(textId),duration);
}
public static void info(Context context ,String text){
showToast(context, R.drawable.ic_info, text, Toast.LENGTH_SHORT);
}
public static void info(Context context ,int textId){
showToast(context, R.drawable.ic_info,context.getString(textId),Toast.LENGTH_SHORT);
}
//success
public static void success(Context context ,String text, int duration){
showToast(context, R.drawable.ic_success, text, duration);
}
public static void success(Context context ,int textId, int duration){
showToast(context, R.drawable.ic_success, context.getString(textId),duration);
}
public static void success(Context context ,String text){
showToast(context, R.drawable.ic_success, text, Toast.LENGTH_SHORT);
}
public static void success(Context context ,int textId){
showToast(context, R.drawable.ic_success, context.getString(textId),Toast.LENGTH_SHORT);
}
//error
public static void error(Context context ,String text, int duration){
showToast(context, R.drawable.ic_error, text, duration);
}
public static void error(Context context ,int textId, int duration){
showToast(context, R.drawable.ic_error, context.getString(textId),duration);
}
public static void error(Context context ,String text){
showToast(context, R.drawable.ic_error, text, Toast.LENGTH_SHORT);
}
public static void error(Context context ,int textId){
showToast(context, R.drawable.ic_error, context.getString(textId),Toast.LENGTH_SHORT);
}
//loading
public static void loading(Context context ,String text){
View view=LayoutInflater.from(context).inflate
(R.layout.toast_loading,null);
TextView tv=view.findViewById(R.id.tv);
tv.setText(text);
AVLoadingIndicatorView avl=view.findViewById(R.id.avl);
avl.setIndicator(getIndicator(context));
avl.show();
dialog=new AlertDialog.Builder(context,R.style.CustomDialog)
.setView(view)
.setCancelable(false)
.create();
dialog.show();
}
public static void loading(Context context ,int textId){
loading(context, context.getString(textId));
}
//warning
public static void warning(Context context ,String text, int duration){
showToast(context, R.drawable.ic_warning, text, duration);
}
public static void warning(Context context ,int textId, int duration){
showToast(context, R.drawable.ic_warning, context.getString(textId),duration);
}
public static void warning(Context context ,String text){
showToast(context, R.drawable.ic_warning, text, Toast.LENGTH_SHORT);
}
public static void warning(Context context ,int textId){
showToast(context, R.drawable.ic_warning, context.getString(textId),Toast.LENGTH_SHORT);
}
public static void cancel(){
if (toast != null) {
toast.cancel();
}
if (dialog != null) {
dialog.cancel();
}
}
static void showToast(Context context, int iconId, String text, int duration){
if (toast != null) {
toast.cancel();
}
toast=Toast.makeText(context, text, duration);
toast.setGravity(Gravity.CENTER,0,0);
View v= LayoutInflater.from(context).inflate
(R.layout.toast,null);
ImageView ivIcon=v.findViewById(R.id.iv_icon);
ivIcon.setImageResource(iconId);
TextView tv=v.findViewById(R.id.tv);
tv.setText(text);
toast.setView(v);
toast.show();
}
private static String getIndicator(Context context)
{
String[] arrayOfString = context.getResources().getStringArray(R.array.arr_indicator);
int i = new Random().nextInt(arrayOfString.length);
return arrayOfString[i];
}
}
