广播：发送有序、无序（标准）广播

image.png

一、创建3个广播接收器类，先静态注册

        enabled 启用
        exported 出口，输出
        priority 优先级

        <receiver
            android:name=".type2.service.MyReceiver1"
            android:enabled="true"
            android:exported="true">

            <intent-filter android:priority="80">
                <action android:name="com.jiyun.action.ABC" />
            </intent-filter>

        </receiver>
        <receiver
            android:name=".type2.service.MyReceiver2"
            android:enabled="true"
            android:exported="true">

            <intent-filter android:priority="90">
                <action android:name="com.jiyun.action.ABC" />
            </intent-filter>

        </receiver>
        <receiver
            android:name=".type2.service.MyReceiver3"
            android:enabled="true"
            android:exported="true">

            <intent-filter android:priority="100">
                <action android:name="com.jiyun.action.ABC" />
            </intent-filter>

        </receiver>

二、写布局

activity_main2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".type2.activity.Main2Activity">

    <Button
        android:id="@+id/sendBtn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="标准" />

    <Button
        android:id="@+id/sendOrderBtn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="有序" />

</LinearLayout>

三、activity 包下的

MainActivity2.java

public class Main2Activity extends AppCompatActivity implements View.OnClickListener {

    /**
     * 标准
     */
    private Button mSendBtn;
    /**
     * 有序
     */
    private Button mSendOrderBtn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        initView();
    }

    private void initView() {
        mSendBtn = (Button) findViewById(R.id.sendBtn);
        mSendBtn.setOnClickListener(this);
        mSendOrderBtn = (Button) findViewById(R.id.sendOrderBtn);
        mSendOrderBtn.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            default:
                break;
            case R.id.sendBtn:

                // 定义action 活动，发送标准广播
                Intent intent = new Intent("com.jiyun.action.ABC");
                intent.putExtra("name", "guolei");
                sendBroadcast(intent);

                break;
            case R.id.sendOrderBtn:

                // 发送有序广播
                Intent intent1 = new Intent("com.jiyun.action.ABC");
                sendOrderedBroadcast(intent1, null);

                break;
        }
    }
}

四、service 包下的

1. MyReceiver1.java：接收到传输的消息，并toast，然后跳转到MainActivity页面

public class MyReceiver1 extends BroadcastReceiver {

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

        // 接收广播发送的消息
        String name = intent.getStringExtra("name");
        Toast.makeText(context, "MyReceiver1" + name, Toast.LENGTH_SHORT).show();

        // 跳转到第一个页面
        Intent intentMain = new Intent(context, MainActivity.class);
        intentMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//非页面之外启动页面，需要自带加载任务栈
        context.startActivity(intentMain);

    }

}

2. MyReceiver2.java：toast，并且拦截广播

public class MyReceiver2 extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context,"MyReceiver2",Toast.LENGTH_SHORT).show();
        abortBroadcast();//拦截广播
    }

}

3. MyReceiver3.java：toast

public class MyReceiver3 extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context,"MyReceiver3",Toast.LENGTH_SHORT).show();
    }

}