关于推送，反复看了几遍还是迷迷糊糊。

manifest

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.jpush" >


    <!-- Required -->
    <permission
        android:name="${applicationId}.permission.JPUSH_MESSAGE"
        android:protectionLevel="signature" />

    <!-- Required  一些系统要求的权限，如访问网络等-->
    <uses-permission android:name="${applicationId}.permission.JPUSH_MESSAGE" />
    <uses-permission android:name="android.permission.RECEIVE_USER_PRESENT" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission-sdk-23 android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />



    <!-- Optional for location -->
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" /> <!-- 用于开启 debug 版本的应用在6.0 系统上 层叠窗口权限 -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" /><!-- Android Q后台定位权限-->
    <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
    <uses-permission android:name="android.permission.GET_TASKS" />

    <application
        android:icon="@mipmap/ic_launcher"
        android:allowBackup="false"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        android:name=".MyApplication">

        <!-- For test only 测试的主程序-->
        <activity

            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>


        <!-- Rich push 核心功能 since 2.0.6-->
        <activity
            android:name="cn.jpush.android.ui.PopWinActivity"
            android:theme="@style/MyDialogStyle"
            android:exported="false">
        </activity>

        <!-- Required SDK核心功能-->
        <activity
            android:name="cn.jpush.android.ui.PushActivity"
            android:configChanges="orientation|keyboardHidden"
            android:theme="@android:style/Theme.NoTitleBar"
            android:exported="false">
            <intent-filter>
                <action android:name="cn.jpush.android.ui.PushActivity" />
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="${applicationId}" />
            </intent-filter>
        </activity>

        <!-- Required SDK 核心功能-->
        <!-- 可配置android:process参数将PushService放在其他进程中 -->
        <service
            android:name="cn.jpush.android.service.PushService"
            android:process=":pushcore"
            android:exported="false">
            <intent-filter>
                <action android:name="cn.jpush.android.intent.REGISTER" />
                <action android:name="cn.jpush.android.intent.REPORT" />
                <action android:name="cn.jpush.android.intent.PushService" />
                <action android:name="cn.jpush.android.intent.PUSH_TIME" />
            </intent-filter>
        </service>

        <!-- since 3.0.9 Required SDK 核心功能-->
        <provider
            android:authorities="${applicationId}.DataProvider"
            android:name="cn.jpush.android.service.DataProvider"
            android:process=":pushcore"
            android:exported="false"
            />

        <!-- since 1.8.0 option 可选项。用于同一设备中不同应用的JPush服务相互拉起的功能。 -->
        <!-- 若不启用该功能可删除该组件，将不拉起其他应用也不能被其他应用拉起 -->
        <service
            android:name="cn.jpush.android.service.DaemonService"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="cn.jpush.android.intent.DaemonService" />
                <category android:name="${applicationId}" />
            </intent-filter>

        </service>

        <!-- since 3.1.0 Required SDK 核心功能-->
        <provider
            android:authorities="${applicationId}.DownloadProvider"
            android:name="cn.jpush.android.service.DownloadProvider"
            android:exported="true"
            />

        <!-- Required SDK核心功能-->
        <receiver
            android:name="cn.jpush.android.service.PushReceiver"
            android:enabled="true"
            android:exported="false">
            <intent-filter android:priority="1000">
                <action android:name="cn.jpush.android.intent.NOTIFICATION_RECEIVED_PROXY" />   <!--Required  显示通知栏 -->
                <category android:name="${applicationId}" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.USER_PRESENT" />
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            </intent-filter>
            <!-- Optional -->
            <intent-filter>
                <action android:name="android.intent.action.PACKAGE_ADDED" />
                <action android:name="android.intent.action.PACKAGE_REMOVED" />

                <data android:scheme="package" />
            </intent-filter>
        </receiver>

        <!-- Required SDK核心功能-->
        <receiver android:name="cn.jpush.android.service.AlarmReceiver" android:exported="false"/>


        <!-- User defined.  For test only  用户自定义的广播接收器-->
        <receiver
            android:name=".MyReceiver"
            android:exported="false"
            android:enabled="true">
            <intent-filter>
                <action android:name="cn.jpush.android.intent.REGISTRATION" /> <!--Required  用户注册SDK的intent-->
                <action android:name="cn.jpush.android.intent.MESSAGE_RECEIVED" /> <!--Required  用户接收SDK消息的intent-->
                <action android:name="cn.jpush.android.intent.NOTIFICATION_RECEIVED" /> <!--Required  用户接收SDK通知栏信息的intent-->
                <action android:name="cn.jpush.android.intent.NOTIFICATION_OPENED" /> <!--Required  用户打开自定义通知栏的intent-->
                <action android:name="cn.jpush.android.intent.CONNECTION" /><!-- 接收网络变化 连接/断开 since 1.6.3 -->
                <category android:name="${applicationId}" />
            </intent-filter>
        </receiver>



        <!-- User defined.  For test only  用户自定义接收消息器,3.0.7开始支持,目前新tag/alias接口设置结果会在该广播接收器对应的方法中回调-->
        <!--since 3.3.0 接收JPush相关事件-->
        <receiver android:name=".jpush320.MyjPushMessageReceiver">
            <intent-filter>
                <action android:name="cn.jpush.android.intent.RECEIVE_MESSAGE" />
                <category android:name="${applicationId}"></category>
            </intent-filter>
        </receiver>

        <!--since 3.3.0 Required SDK核心功能-->
        <activity
            android:name="cn.jpush.android.service.JNotifyActivity"
            android:exported="true"
            android:taskAffinity="jpush.custom"
            android:theme="@android:style/Theme.Translucent.NoTitleBar">
            <intent-filter>
                <action android:name="cn.jpush.android.intent.JNotifyActivity" />
                <category android:name="${applicationId}" />
            </intent-filter>
        </activity>

        <!-- since 3.3.0 Required SDK 核心功能-->
        <!-- 可配置android:process参数将PushService放在其他进程中 -->
        <!--User defined.  For test only 继承自cn.jpush.android.service.JCommonService-->
        <service android:name=".jpush320.MyJCommonService"
            android:process=":pushcore">
            <intent-filter>
                <action android:name="cn.jiguang.user.service.action" />
            </intent-filter>
        </service>

        <!-- Required  . Enable it you can get statistics data with channel -->
        <meta-data android:name="JPUSH_CHANNEL" android:value="${JPUSH_CHANNEL}"/>
        <meta-data android:name="JPUSH_APPKEY" android:value="${JPUSH_APPKEY}" /> <!--  </>值来自开发者平台取得的AppKey-->

    </application>

</manifest>

MyApplcation.java

import cn.jpush.android.api.JPushInterface;

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        JPushInterface.setDebugMode(true);
        JPushInterface.init(this);
    }
}

MyReceiver.java

public class MyReceiver extends BroadcastReceiver {
   private static final String TAG = "JIGUANG-Example";

   @Override
   public void onReceive(Context context, Intent intent) {
      try {
         Bundle bundle = intent.getExtras();
         Log.e(TAG, "[MyReceiver] onReceive - " + intent.getAction() + ", extras: " + printBundle(bundle));

         if (JPushInterface.ACTION_REGISTRATION_ID.equals(intent.getAction())) {
            String regId = bundle.getString(JPushInterface.EXTRA_REGISTRATION_ID);
            Log.e(TAG, "[MyReceiver] 接收Registration Id : " + regId);
            //send the Registration Id to your server...

         } else if (JPushInterface.ACTION_MESSAGE_RECEIVED.equals(intent.getAction())) {
            Log.e(TAG, "[MyReceiver] 接收到推送下来的自定义消息: " + bundle.getString(JPushInterface.EXTRA_MESSAGE));

            Toast.makeText(context, bundle.getString(JPushInterface.EXTRA_MESSAGE), Toast.LENGTH_SHORT).show();

         } else if (JPushInterface.ACTION_NOTIFICATION_RECEIVED.equals(intent.getAction())) {
            Log.e(TAG, "[MyReceiver] 接收到推送下来的通知");
            int notifactionId = bundle.getInt(JPushInterface.EXTRA_NOTIFICATION_ID);
            Log.e(TAG, "[MyReceiver] 接收到推送下来的通知的ID: " + notifactionId);

         } else if (JPushInterface.ACTION_NOTIFICATION_OPENED.equals(intent.getAction())) {
            Log.e(TAG, "[MyReceiver] 用户点击打开了通知");

            String extra = bundle.getString(JPushInterface.EXTRA_EXTRA);
            JSONObject jsonObject = new JSONObject(extra);
            if ("Android".equals(jsonObject.getString("type"))) {
               Intent i = new Intent(context, MainActivity.class);
               i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
               context.startActivity(i);
            } else {
               Intent i = new Intent(context, MainActivity.class);
               i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
               context.startActivity(i);
            }

         } else if (JPushInterface.ACTION_RICHPUSH_CALLBACK.equals(intent.getAction())) {
            Log.e(TAG, "[MyReceiver] 用户收到到RICH PUSH CALLBACK: " + bundle.getString(JPushInterface.EXTRA_EXTRA));
            //在这里根据 JPushInterface.EXTRA_EXTRA 的内容处理代码，比如打开新的Activity， 打开一个网页等..

         } else if(JPushInterface.ACTION_CONNECTION_CHANGE.equals(intent.getAction())) {
            boolean connected = intent.getBooleanExtra(JPushInterface.EXTRA_CONNECTION_CHANGE, false);
            Log.e(TAG, "[MyReceiver]" + intent.getAction() +" connected state change to "+connected);
         } else {
            Log.e(TAG, "[MyReceiver] Unhandled intent - " + intent.getAction());
         }
      } catch (Exception e){

      }

   }

   // 打印所有的 intent extra 数据
   private static String printBundle(Bundle bundle) {
      StringBuilder sb = new StringBuilder();
      for (String key : bundle.keySet()) {
         if (key.equals(JPushInterface.EXTRA_NOTIFICATION_ID)) {
            sb.append("\nkey:" + key + ", value:" + bundle.getInt(key));
         }else if(key.equals(JPushInterface.EXTRA_CONNECTION_CHANGE)){
            sb.append("\nkey:" + key + ", value:" + bundle.getBoolean(key));
         } else if (key.equals(JPushInterface.EXTRA_EXTRA)) {
            if (TextUtils.isEmpty(bundle.getString(JPushInterface.EXTRA_EXTRA))) {
               Log.e(TAG, "This message has no Extra data");
               continue;
            }

            try {
               JSONObject json = new JSONObject(bundle.getString(JPushInterface.EXTRA_EXTRA));
               Iterator<String> it =  json.keys();

               while (it.hasNext()) {
                  String myKey = it.next();
                  sb.append("\nkey:" + key + ", value: [" +
                        myKey + " - " +json.optString(myKey) + "]");
               }
            } catch (JSONException e) {
               Log.e(TAG, "Get message extra JSON error!");
            }

         } else {
            sb.append("\nkey:" + key + ", value:" + bundle.get(key));
         }
      }
      return sb.toString();
   }

}