近期為了適配劉海屏，向公司申購了一步小米8的手機，然後測試人員那邊測出來一堆適配的問題，其中有一個每一個Toast會顯示app的名稱+顯示的內容，然後網上查找了一下解決方法記錄一下，順便封裝了ToastUtil方便呼叫。

  1 package cc.wulian.smarthomev6.support.utils;
  2 
  3 import android.support.annotation.StringRes;
  4 import android.view.Gravity;
  5 import android.widget.TextView;
  6 import android.widget.Toast;
 
  7 
  8 import cc.wulian.smarthomev6.R;
  9 import cc.wulian.smarthomev6.main.application.MainApplication;
 10 
 11 /**
 12  * Created by huxc on 2017/6/15.
 13  * 統一彈Toast
 14  */
 15 
 16 public class ToastUtil {
 17     private static Toast toast;
 18 
 19     public static void show(String text) {
 20
 
         if (toast == null) {
 21             toast = Toast.makeText(MainApplication.getApplication(), null, Toast.LENGTH_SHORT);
　　　　　　　　　　//這個地方第二個引數需要為null
 22             toast.setText(text);
 23         } else {
 24             toast.setText(text);
 25         }
 26         toast.show();
 27     }
 
 28 
 29     public static void show(@StringRes int resId) {
 30         if (toast == null) {
 31             toast = Toast.makeText(MainApplication.getApplication(), null, Toast.LENGTH_SHORT);
 32             toast.setText(resId);
 33         } else {
 34             toast.setText(resId);
 35         }
 36         toast.show();
 37     }
 38 
 39     /**
 40      * 彈出多個toast時, 不會一個一個的彈, 後面一個要顯示的內容直接顯示在當前的toast上
 41      */
 42     public static void single(String msg) {
 43         if (toast == null) {
 44             toast = Toast.makeText(MainApplication.getApplication(), null, Toast.LENGTH_SHORT);
 45             toast.setText(msg);
 46         } else {
 47             toast.setText(msg);
 48         }
 49         toast.show();
 50     }
 51 
 52     public static void singleLong(String msg) {
 53         if (toast == null) {
 54             toast = Toast.makeText(MainApplication.getApplication(), null, Toast.LENGTH_LONG);
 55             toast.setText(msg);
 56         } else {
 57             toast.setText(msg);
 58         }
 59         toast.show();
 60     }
 61 
 62     /**
 63      * 多行居中顯示
 64      */
 65     public static void singleCenter(@StringRes int msg) {
 66         if (toast == null) {
 67             toast = Toast.makeText(MainApplication.getApplication(), null, Toast.LENGTH_SHORT);
 68             toast.setText(msg);
 69         } else {
 70             toast.setText(msg);
 71         }
 72         ((TextView) toast.getView().findViewById(android.R.id.message)).setGravity(Gravity.CENTER);
 73         toast.show();
 74     }
 75 
 76     /**
 77      * 多行居中顯示
 78      */
 79     public static void singleCenter(String msg) {
 80         if (toast == null) {
 81             toast = Toast.makeText(MainApplication.getApplication(), null, Toast.LENGTH_SHORT);
 82             toast.setText(msg);
 83         } else {
 84             toast.setText(msg);
 85         }
 86         ((TextView) toast.getView().findViewById(android.R.id.message)).setGravity(Gravity.CENTER);
 87         toast.show();
 88     }
 89 
 90     /**
 91      * 彈出多個toast時, 不會一個一個的彈, 後面一個要顯示的內容直接顯示在當前的toast上
 92      */
 93     public static void single(@StringRes int msg) {
 94         if (toast == null) {
 95             toast = Toast.makeText(MainApplication.getApplication(), null, Toast.LENGTH_SHORT);
 96             toast.setText(msg);
 97         } else {
 98             toast.setText(msg);
 99         }
100         toast.show();
101     }
102 }

Toast.makeText()方法的第二個引數傳null,然後mtoast.settext(text)重新設定一下。