android广播接收器的无序广播和有序广播

快来打我* 2024-04-01 12:07 134阅读 0赞

1.无序广播,就普通广播,没有先后顺序,几乎同时收到消息

2.有序广播,可**以设置接收器的顺序优先级，还可以对广播设置设置截断,修改**  
通过设置**abortBroadcast()进行截断，通过setResultExtras(bundle)向下游广播接收器传递额外的键值对信息或者setResultData(“”)直接传送字符串**,下游广播通过**getResultExtras**方法接收信息,**getResultData**()方法接收字符串信息

示例有序广播  
清单文件:  
有序广播的顺序通过清单文件里的android:priority属性的数字大小进行优先级设置:范围为(-1000到1000)数字越大，优先级越高,

<intent-filter android:priority="003">

可参考下图:  
![在这里插入图片描述][285e6656f413492c810ccbbc047d9ea8.jpeg]

<receiver
                android:name=".broadcast.MyHaveBroadcastReceiver01"
                android:exported="true">
                <intent-filter>
                    <action android:name="my_have_broadcast_receiver"></action>
                </intent-filter>
            </receiver>
    
            <receiver
                android:name=".broadcast.MyHaveBroadcastReceiver02"
                android:exported="true">
                <intent-filter android:priority="003">
                    <action android:name="my_have_broadcast_receiver"></action>
                </intent-filter>
            </receiver>
            <receiver
                android:name=".broadcast.MyHaveBroadcastReceiver03"
                android:exported="true">
                <intent-filter android:priority="002">
                    <action android:name="my_have_broadcast_receiver"></action>
                </intent-filter>
            </receiver>

/**
     * 有序广播01
     */
    public class MyHaveBroadcastReceiver01 extends BroadcastReceiver {
    
        private static final String TAG = "MyHaveBroadcastReceiver01";
    
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent != null) {
                Bundle extras = intent.getExtras();
                String data = "";
                if (extras != null) {
                    data = extras.getString("name");
                }
                Log.d(TAG, "MyHaveBroadcastReceiver01 onReceive"+data);
            }
        }
    }

/**
     * 有序广播02
     */
    public class MyHaveBroadcastReceiver02 extends BroadcastReceiver {
    
        private static final String TAG = "MyHaveBroadcastReceiver02";
    
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent != null) {
                Bundle extras = intent.getExtras();
                String data = "";
                if (extras != null) {
                    data = extras.getString("name3");
    
                    /**
                     * 2.1有序广播可以通过setResultExtras向下游广播接收器传递数据
                     */
                    extras.putString("name2", "喊你速速到龙阳路集合");
                    setResultExtras(extras);
                    /**
                     * 2.2有序广播可以通过setResultData向下游广播接收器传递字符串
                     */
                    setResultData("2号口的信息");
                }
                Log.d(TAG, "MyHaveBroadcastReceiver02 onReceive" + data);
                /**
                 * 1.有序广播可以通过abortBroadcast();方法对广播进行截断
                 */
    //            abortBroadcast();
            }
    
        }
    }

/**
     * 有序广播03
     */
    public class MyHaveBroadcastReceiver03 extends BroadcastReceiver {
    
        private static final String TAG = "MyHaveBroadcastReceiver03";
    
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent != null) {
                Bundle extras = intent.getExtras();
                String data = "";
                if (extras != null) {
                    data = extras.getString("name");
                }
                Log.d(TAG, "MyHaveBroadcastReceiver03 onReceive" + data);
                /**
                 * 获取上游广播传递过来的数据
                 */
                //方法1
                Bundle bundle = getResultExtras(true);
                String strData = bundle.getString("name2");
                String resultData = getResultData();
                //方法2，直接获取字符串
                if (strData != null) {
                    Log.d(TAG, "上游广播传递来的信息 onReceive" + strData +"\t\t\t"+ resultData);
                }
            }
        }
    }

Activity页面：StaticDynamicTestActivity.java

/**
     * 静态广播和动态广播的测试
     * 默认情况下,静态注册的广播隐式的收不到
     * 有序广播和无序广播的测试
     */
    public class StaticDynamicTestActivity extends AppCompatActivity {
        Button btnHaveOrder;
        Button btnNoHaveOrder;
        private MyDyBroadcastReceiver myDyBroadcastReceiver = new MyDyBroadcastReceiver();
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_static_dynamic_test);
    
            //注册动态广播接收器
            IntentFilter filter = new IntentFilter();
            filter.addAction("my_dy_broadcast_receiver");
            //注册
            registerReceiver(myDyBroadcastReceiver, filter);
            registerReceiver(mBatteryBroadcast, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
    
            btnHaveOrder = findViewById(R.id.btn_haveOrder);
            btnNoHaveOrder = findViewById(R.id.btn_noOrder);
            haveOrder();
            noOrder();
        }
    
        //发送静态广播
        @SuppressWarnings("wrongConstant")
        public void sendStaticBroadcast(View view) {
            Intent intent = new Intent();
            intent.setAction("my_broadcast_receiver");
            //安卓8.0以及以后做了禁止后台运行，不加setPackage无法收到隐式广播或者以下
            //intent.addFlags(0x01000000);//不推荐
            intent.setPackage(getPackageName());
            sendBroadcast(intent);
        }
    
        //发送动态广播
        @SuppressWarnings("wrongConstant")
        public void sendDyBroadcast(View view) {
            Intent intent = new Intent();
            intent.setAction("my_dy_broadcast_receiver");
    //        //安卓8.0以及以后做了禁止后台运行，不加setPackage无法收到隐式广播或者以下
    //        //intent.addFlags(0x01000000);//不推荐
    //        intent.setPackage(getPackageName());
            sendBroadcast(intent);
        }
    
        BroadcastReceiver mBatteryBroadcast = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                int level = intent.getIntExtra("level", 0);
                Toast.makeText(context, "电池电量还有百分之" + level, Toast.LENGTH_LONG).show();
            }
        };
    
    
        /**
         * 有序广播
         */
        void haveOrder() {
            btnHaveOrder.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent intent = new Intent();
                    intent.setAction("my_have_broadcast_receiver");
    
                    //这里注意传递个bundle参数
                    Bundle bundle = new Bundle();
                    bundle.putString("name3","回家吃饭了");
                    intent.putExtras(bundle);
                    //安卓8.0以及以后做了禁止后台运行，不加setPackage无法收到隐式广播或者以下
                    intent.setPackage(getPackageName());
                    sendOrderedBroadcast(intent, null);
                }
            });
        }
    
        /**
         * 无序广播
         */
        void noOrder() {
            btnNoHaveOrder.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent intent = new Intent();
                    intent.setAction("my_no_broadcast_receiver");
                    //安卓8.0以及以后做了禁止后台运行，不加setPackage无法收到隐式广播或者以下
                    intent.setPackage(getPackageName());
                    sendBroadcast(intent);
                }
            });
        }
    
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
            //解除注册
            unregisterReceiver(myDyBroadcastReceiver);
            unregisterReceiver(mBatteryBroadcast);
        }
    }

Activity对应的xml页面:activity\_static\_dynamic\_test.xml

<?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".broadcast.StaticDynamicTestActivity">
    
        <Button
            android:id="@+id/bt_static"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="sendStaticBroadcast"
            android:text="发送静态广播啦">
    
        </Button>
    
        <Button
            android:id="@+id/btn_dy"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:onClick="sendDyBroadcast"
            android:text="发送动态广播"
            app:layout_constraintTop_toBottomOf="@+id/bt_static" />
    
        <Button
            android:id="@+id/btn_battery"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:onClick="sendDyBroadcast"
            android:text="获取电池电量"
            app:layout_constraintTop_toBottomOf="@+id/btn_dy">
    
        </Button>
    
        <Button
            android:id="@+id/btn_haveOrder"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:onClick="sendDyBroadcast"
            android:text="有序广播"
            app:layout_constraintTop_toBottomOf="@+id/btn_battery">
    
        </Button>
    
        <Button
            android:id="@+id/btn_noOrder"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:onClick="sendDyBroadcast"
            android:text="无序号广播"
            app:layout_constraintTop_toBottomOf="@+id/btn_haveOrder">
    
        </Button>
    </androidx.constraintlayout.widget.ConstraintLayout>

以上为简单使用参考:有问题加QQ：1393508286

[285e6656f413492c810ccbbc047d9ea8.jpeg]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/01/ace3500085144339a2ef2a3606317e57.jpeg