Toast显示的时间最长是5S,有时候需要显示的时间更长；Toast默认背景是黑色的，有时候希望它更炫酷；所以，你需要自定义Toast。
那么，怎么去自定义呢？找到系统Toast源代码抽出来，依葫芦画瓢！分两步：
1.获取Toast的对象:获取toast里面需要填充的view对象
2.显示toast：设置一些显示的参数，获取一个窗口管理器，将该view加入到该窗口上
通常Toast.makeText(Context context, CharSequence text, int duration).show一步搞定。那先来看看makeTest()方法中是些什么。
1 public static Toast makeText(Context context, CharSequence text, int duration) {
2 Toast result = new Toast(context);
3
4 LayoutInflater inflate = (LayoutInflater)
5 context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
6 View v = inflate.inflate(com.android.internal.R.layout.transient_notification, null);
7 TextView tv = (TextView)v.findViewById(com.android.internal.R.id.message);
8 tv.setText(text);
9
10 result.mNextView = v;
11 result.mDuration = duration;
12
13 return result;
14 }
可以看到黄色标注的填充了一个系统的布局文件，换成自己定义的布局文件
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:orientation="vertical" 6 android:background="@drawable/call_locate_gray"> 7 8 <TextView 9 android:id="@+id/tv_mytoast_addr" 10 android:layout_width="wrap_content" 11 android:layout_height="wrap_content" 12 android:layout_gravity="center_horizontal" 13 android:textColor="#000000" 14 android:drawableLeft="@android:drawable/stat_sys_phone_call" 15 android:shadowColor="#BB000000" 16 android:shadowRadius="2.75" 17 /> 18 19 </LinearLayout>
再来看看这个TN构造函数：
private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();
1 TN() {
2 // XXX This should be changed to use a Dialog, with a Theme.Toast
3 // defined that sets up the layout params appropriately.
4 final WindowManager.LayoutParams params = mParams;
5 params.height = WindowManager.LayoutParams.WRAP_CONTENT;
6 params.width = WindowManager.LayoutParams.WRAP_CONTENT;
7 params.format = PixelFormat.TRANSLUCENT;
8 params.windowAnimations = com.android.internal.R.style.Animation_Toast;//自定义时删除
9 params.type = WindowManager.LayoutParams.TYPE_TOAST;
10 params.setTitle("Toast");
11 params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
12 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
13 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
14 }
源代码中有showMyToast()和hideMyToast()两个方法后，可以任意显示和关闭
private WindowManager mWM;
private View v;
1 private void showMyToast(String addr) {
2 //初始化view
3 LayoutInflater inflate = (LayoutInflater)
4 getSystemService(Context.LAYOUT_INFLATER_SERVICE);
5 v = inflate.inflate(R.layout.mytoast_showaddr, null);
6 TextView tv = (TextView)v.findViewById(R.id.tv_mytoast_addr);
7 tv.setText(addr);
8
9
10
11 //private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();
12
13 final WindowManager.LayoutParams params = new WindowManager.LayoutParams();;
14 params.height = WindowManager.LayoutParams.WRAP_CONTENT;
15 params.width = WindowManager.LayoutParams.WRAP_CONTENT;
16 params.format = PixelFormat.TRANSLUCENT;
17 //params.windowAnimations = com.android.internal.R.style.Animation_Toast;
18 params.type = WindowManager.LayoutParams.TYPE_TOAST;
19 params.setTitle("Toast");
20 params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
21 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
22 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
23
24 mWM = (WindowManager)getSystemService(Context.WINDOW_SERVICE);//获取窗口管理器并加入该view
25 mWM.addView(v, params);
26
27 }
1 private void hideMyToast(){
2
3 if (v!=null) {
4 mWM.removeView(v);
5 }
6 v=null;
7 }
效果图：本例是模仿手机管家中来电开启显示号码归属地功能。当来电时显示使用toast显示归属地，去电时toast消失。
源代码：
1 package com.cskaoyan.mobilemanager.service;
2
3 import com.cskaoyan.mobilemanager.R;
4 import com.cskaoyan.mobilemanager.dao.AdressQueryDao;
5
6 import android.app.Service;
7 import android.content.Context;
8 import android.content.Intent;
9 import android.graphics.PixelFormat;
10 import android.os.IBinder;
11 import android.telephony.PhoneStateListener;
12 import android.telephony.TelephonyManager;
13 import android.view.LayoutInflater;
14 import android.view.View;
15 import android.view.WindowManager;
16 import android.widget.TextView;
17 import android.widget.Toast;
18
19 public class ShowCallLocation extends Service {
20
21 private TextView tv;
22 private WindowManager mWM;
23 private View v;
24 private TelephonyManager tm;
25 private MyPhoneCallListener listener;
26
27 @Override
28 public IBinder onBind(Intent intent) {
29 // TODO Auto-generated method stub
30 return null;
31 }
32
33 @Override
34 public int onStartCommand(Intent intent, int flags, int startId) {
35 tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
36 listener = new MyPhoneCallListener();
37 tm.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
38
39 System.out.println("ShowCallLocation.onStartCommand()");
40 return super.onStartCommand(intent, flags, startId);
41 }
42
43 class MyPhoneCallListener extends PhoneStateListener{
44
45 @Override
46 public void onCallStateChanged(int state, String incomingNumber) {
47 // TODO Auto-generated method stub
48
49 switch (state) {
50 case TelephonyManager.CALL_STATE_IDLE:
51 hideMyToast();
52 break;
53 case TelephonyManager.CALL_STATE_RINGING:
54 String addr = AdressQueryDao.querryAddr(incomingNumber);//取出来电查询到的号码归属地
55 System.out
56 .println("ShowCallLocation.MyPhoneCallListener.onCallStateChanged()"+addr);
57 Toast.makeText(getApplicationContext(), addr, 1).show();
58
59 //显示一个自定义的toast
60 showMyToast(addr);
61 break;
62 case TelephonyManager.CALL_STATE_OFFHOOK:
63
64 break;
65
66
67
68 default:
69 break;
70 }
71 super.onCallStateChanged(state, incomingNumber);
72 }
73
74
75
76 }
77
78 /*
79 * 1.获取Toast的对象——:获取toast里面需要填充的view对象
80 * 2.显示toast：设置一些显示的参数，获取一个窗口管理器，将该view加入到该窗口上
81 * */
82 private void showMyToast(String addr) {
83 //初始化view
84 LayoutInflater inflate = (LayoutInflater)
85 getSystemService(Context.LAYOUT_INFLATER_SERVICE);
86 v = inflate.inflate(R.layout.mytoast_showaddr, null);
87 TextView tv = (TextView)v.findViewById(R.id.tv_mytoast_addr);
88 tv.setText(addr);
89
90
91
92 //private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();
93
94 final WindowManager.LayoutParams params = new WindowManager.LayoutParams();;
95 params.height = WindowManager.LayoutParams.WRAP_CONTENT;
96 params.width = WindowManager.LayoutParams.WRAP_CONTENT;
97 params.format = PixelFormat.TRANSLUCENT;
98 //params.windowAnimations = com.android.internal.R.style.Animation_Toast;
99 params.type = WindowManager.LayoutParams.TYPE_TOAST;
100 params.setTitle("Toast");
101 params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
102 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
103 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
104
105 mWM = (WindowManager)getSystemService(Context.WINDOW_SERVICE);
106 mWM.addView(v, params);
107
108 }
109
110 private void hideMyToast(){
111
112 if (v!=null) {
113 mWM.removeView(v);
114 }
115 v=null;
116 }
117
118 @Override
119 public void onDestroy() {
120 // TODO Auto-generated method stub
121 tm.listen(listener, PhoneStateListener.LISTEN_NONE);
122
123 if (tm!=null) {
124 tm=null;
125 }
126 if (listener!=null) {
127 listener=null;
128 }
129 super.onDestroy();
130 System.out.println("ShowCallLocation.onDestroy()");
131 }
132
133
134 }
时间： 2024-10-23 07:35:00