026_01Toast之完全自定义

　　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。

    public static Toast makeText(Context context, CharSequence text, int duration) {
        Toast result = new Toast(context);

        LayoutInflater inflate = (LayoutInflater)
                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = inflate.inflate(com.android.internal.R.layout.transient_notification, null);
        TextView tv = (TextView)v.findViewById(com.android.internal.R.id.message);
        tv.setText(text);
        
        result.mNextView = v;
        result.mDuration = duration;

        return result;
    }

　　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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@drawable/call_locate_gray">

    <TextView
        android:id="@+id/tv_mytoast_addr"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:textColor="#000000"
        android:drawableLeft="@android:drawable/stat_sys_phone_call"
        android:shadowColor="#BB000000"
        android:shadowRadius="2.75"
        />

</LinearLayout>

　　

　再来看看这个TN构造函数：

 　　private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();

        TN() {
            // XXX This should be changed to use a Dialog, with a Theme.Toast
            // defined that sets up the layout params appropriately.
            final WindowManager.LayoutParams params = mParams;
            params.height = WindowManager.LayoutParams.WRAP_CONTENT;
            params.width = WindowManager.LayoutParams.WRAP_CONTENT;
            params.format = PixelFormat.TRANSLUCENT;
            params.windowAnimations = com.android.internal.R.style.Animation_Toast;//自定义时删除
            params.type = WindowManager.LayoutParams.TYPE_TOAST;
            params.setTitle("Toast");
            params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                    | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                    | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
        }

　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;

    private void showMyToast(String addr) {
        //初始化view 
        LayoutInflater inflate = (LayoutInflater)
                getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = inflate.inflate(R.layout.mytoast_showaddr, null);
        TextView tv = (TextView)v.findViewById(R.id.tv_mytoast_addr);
        tv.setText(addr);
        
        
         
          //private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();

          final WindowManager.LayoutParams params = new WindowManager.LayoutParams();;
          params.height = WindowManager.LayoutParams.WRAP_CONTENT;
          params.width = WindowManager.LayoutParams.WRAP_CONTENT;
          params.format = PixelFormat.TRANSLUCENT;
          //params.windowAnimations = com.android.internal.R.style.Animation_Toast;
          params.type = WindowManager.LayoutParams.TYPE_TOAST;
          params.setTitle("Toast");
          params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                  | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                  | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
          
          mWM = (WindowManager)getSystemService(Context.WINDOW_SERVICE);//获取窗口管理器并加入该view
          mWM.addView(v, params);
          
     }

    private void hideMyToast(){
        
        if (v!=null) {
            mWM.removeView(v);
        }
        v=null;
    }

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：

package com.cskaoyan.mobilemanager.service;

import com.cskaoyan.mobilemanager.R;
import com.cskaoyan.mobilemanager.dao.AdressQueryDao;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.IBinder;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;
import android.widget.Toast;

public class ShowCallLocation extends Service {

    private TextView tv;
    private WindowManager mWM;
    private View v;
    private TelephonyManager tm;
    private MyPhoneCallListener listener;

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
    
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
        listener = new MyPhoneCallListener();
        tm.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
        
        System.out.println("ShowCallLocation.onStartCommand()");
        return super.onStartCommand(intent, flags, startId);
    }
    
    class MyPhoneCallListener extends PhoneStateListener{

        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            // TODO Auto-generated method stub
            
            switch (state) {
            case TelephonyManager.CALL_STATE_IDLE:
                hideMyToast();
                break;
            case TelephonyManager.CALL_STATE_RINGING:
                String addr = AdressQueryDao.querryAddr(incomingNumber);//取出来电查询到的号码归属地
                System.out
                        .println("ShowCallLocation.MyPhoneCallListener.onCallStateChanged()"+addr);
                Toast.makeText(getApplicationContext(), addr, 1).show();

                //显示一个自定义的toast
                 showMyToast(addr);
                break;
            case TelephonyManager.CALL_STATE_OFFHOOK:
                
                break;
                
         
      
            default:
                break;
            }
            super.onCallStateChanged(state, incomingNumber);
        }

    
        
    }
    
    /*
     * 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
     * */
    private void showMyToast(String addr) {
        //初始化view 
        LayoutInflater inflate = (LayoutInflater)
                getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = inflate.inflate(R.layout.mytoast_showaddr, null);
        TextView tv = (TextView)v.findViewById(R.id.tv_mytoast_addr);
        tv.setText(addr);
        
        
         
          //private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();

          final WindowManager.LayoutParams params = new WindowManager.LayoutParams();;
          params.height = WindowManager.LayoutParams.WRAP_CONTENT;
          params.width = WindowManager.LayoutParams.WRAP_CONTENT;
          params.format = PixelFormat.TRANSLUCENT;
          //params.windowAnimations = com.android.internal.R.style.Animation_Toast;
          params.type = WindowManager.LayoutParams.TYPE_TOAST;
          params.setTitle("Toast");
          params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                  | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                  | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
          
          mWM = (WindowManager)getSystemService(Context.WINDOW_SERVICE);
          mWM.addView(v, params);
          
     }
    
    private void hideMyToast(){
        
        if (v!=null) {
            mWM.removeView(v);
        }
        v=null;
    }
    
    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        tm.listen(listener, PhoneStateListener.LISTEN_NONE);

        if (tm!=null) {
            tm=null;
        }
        if (listener!=null) {
            listener=null;
        }
        super.onDestroy();
        System.out.println("ShowCallLocation.onDestroy()");
    }
    

}