一概述

本地廣播事件的發(fā)送和接收都在本應(yīng)用胖秒，不影響其他應(yīng)用也不受其他應(yīng)用影響，只能被動態(tài)注冊超歌，不能靜態(tài)注冊补胚，主要用法都在LocalBroadcastManager類中悯衬，而全局廣播則是在Android設(shè)備上弹沽，主要注冊了就都能收到。

使用

1筋粗、全局廣播Android中使用

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">

    <TextView
        android:id="@+id/tvSend"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_marginTop="20dp"
        android:background="#aeaeae"
        android:gravity="center"
        android:text="發(fā)送廣播"
        android:textColor="#000000" />

    <TextView
        android:id="@+id/tvReceiver"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:gravity="center"
        android:text="展示接受的廣播信息"
        android:textColor="#000000" />

</LinearLayout>

Java中發(fā)送和注冊的代碼

public class NormalBroadCastActivity extends Activity {

    private TextView tvReceiver;
    private final String ACTION_TEST = "demos.android.stormdzh.com.androiddemos.broadcast.NormalBroadCastActivity.TestBroadcastReceiver";
    private int index =0;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.adapter_broadcast_normal);

        tvReceiver = findViewById(R.id.tvReceiver);

        findViewById(R.id.tvSend).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                send("參數(shù)："+index);
                index++;
            }
        });

        //注冊廣播
        registerBroadCast();
    }

    private void send(String param) {

        try {
            Intent intent = new Intent();
            intent.putExtra("param", param);
            intent.setAction(ACTION_TEST);
            sendBroadcast(intent);//發(fā)送標(biāo)準(zhǔn)廣播
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private TestBroadcastReceiver mTestBroadcastReceiver;

    private void registerBroadCast() {
        try {
            //注冊點擊事件廣播
            IntentFilter filter = new IntentFilter(ACTION_TEST);
            filter.setPriority(Integer.MAX_VALUE); //設(shè)置級別
            mTestBroadcastReceiver = new TestBroadcastReceiver();
            registerReceiver(mTestBroadcastReceiver, filter);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public class TestBroadcastReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {

            if (intent == null) return;
            if (!TextUtils.equals(intent.getAction(), ACTION_TEST)) {
                return;
            }
            final String param = intent.getStringExtra("param");
            Log.i("dzh", " 廣播里面收到參數(shù)：" + param);
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    tvReceiver.setText(" 廣播里面收到參數(shù)：" + param);
                }
            });

        }
    }
}

2策橘、本地廣播Android中使用

由于xml文件都是一致的，就不重復(fù)寫了,核心是使用了LocalBroadcastManager娜亿，下面直接貼上java代碼

public class LocalBroadCastActivity extends Activity {

    private TextView tvReceiver;
    private final String ACTION_TEST = "demos.android.stormdzh.com.androiddemos.broadcast.NormalBroadCastActivity.TestBroadcastReceiver";
    private int index =0;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.adapter_broadcast_normal);

        tvReceiver = findViewById(R.id.tvReceiver);

        findViewById(R.id.tvSend).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                send("參數(shù)："+index);
                index++;
            }
        });

        //注冊廣播
        registerBroadCast();
    }

    private void send(String param) {

        try {
            Intent intent = new Intent();
            intent.putExtra("param", param);
            intent.setAction(ACTION_TEST);
            LocalBroadcastManager.getInstance(this).sendBroadcast(intent);//發(fā)送標(biāo)準(zhǔn)廣播
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private TestBroadcastReceiver mTestBroadcastReceiver;

    private void registerBroadCast() {
        try {
            //注冊點擊事件廣播
            IntentFilter filter = new IntentFilter(ACTION_TEST);
            filter.setPriority(Integer.MAX_VALUE); //設(shè)置級別
            mTestBroadcastReceiver = new TestBroadcastReceiver();
            LocalBroadcastManager.getInstance(this).registerReceiver(mTestBroadcastReceiver, filter);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public class TestBroadcastReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {

            if (intent == null) return;
            if (!TextUtils.equals(intent.getAction(), ACTION_TEST)) {
                return;
            }
            final String param = intent.getStringExtra("param");
            Log.i("dzh", " 廣播里面收到參數(shù)：" + param);
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    tvReceiver.setText(" 廣播里面收到參數(shù)：" + param);
                }
            });

        }
    }
}

三丽已、總結(jié)

簡單的使用就是這么多，接下來有空研究下廣播的實現(xiàn)原理买决。