自定义广播接收不到

public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";
    public static final String MY_ACTION = "com.imooc.demo.adcdefg";
    public static final String CONTENT = "broadcast_content";
    private ImoocBroadcastReceiver broadcastReceiver;
    private EditText editText;
    private Button btn;
    private TextView textView;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        broadcastReceiver = new ImoocBroadcastReceiver(textView);
 
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);
        intentFilter.addAction(Intent.ACTION_PACKAGE_INSTALL);
        intentFilter.addDataScheme("package");
        intentFilter.addAction(Intent.ACTION_SCREEN_ON);
        intentFilter.addAction(Intent.ACTION_SCREEN_OFF);
        //自定义一个广播，加入到接收器
        intentFilter.addAction(MY_ACTION);
 
        registerReceiver(broadcastReceiver, intentFilter);
        Log.d(TAG,"设置监听器");
         
        setEvents();
    }
 
    private void setEvents() {
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG,"点击按钮了");
                Intent intent=new Intent(MY_ACTION);
                intent.putExtra(CONTENT,editText.getText().toString());
                sendBroadcast(intent);
                Log.d(TAG,"广播发送了");
            }
        });
    }
 
    private void init() {
        editText = findViewById(R.id.et_broadcast_content);
        btn = findViewById(R.id.btn_send_broadcast);
        textView = findViewById(R.id.tv_received_broadcast);
    }
 
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (broadcastReceiver != null) {
            unregisterReceiver(broadcastReceiver);
        }
    }
}

ImoocBroadcastReceiver

public class ImoocBroadcastReceiver extends BroadcastReceiver {
    TextView textView;
 
    public ImoocBroadcastReceiver() {
    }
 
    public ImoocBroadcastReceiver(TextView textView) {
        this.textView = textView;
    }
 
    private static final String TAG = "ImoocBroadcastReceiver";
 
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG, "触发接收器了");
        if (intent != null) {
            Log.d(TAG, "进入接收器消息处理了");
            String action = intent.getAction();
            Log.d(TAG, "广播接收器信息:" + action);
            if (TextUtils.equals(action, MainActivity.MY_ACTION)) {
                if (textView != null) {
                    String content = intent.getStringExtra(MainActivity.CONTENT);
                    textView.setText("接收到的action是：" + action + "\n接收到的内容是:\n" + content);
                }
            }
        }
    }
}

manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.imooc.broadcastreceiverdemo">
 
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        tools:ignore="GoogleAppIndexingWarning">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver
            android:name=".ImoocBroadcastReceiver"
            >
            <!--<intent-filter>-->
                <!--&lt;!&ndash;应用安装 &ndash;&gt;-->
                <!--<action android:name="android.intent.action.PACKAGE_INSTALL"/>-->
                <!--&lt;!&ndash;应用卸载 &ndash;&gt;-->
                <!--<action android:name="android.intent.action.PACKAGE_REMOVED"/>-->
                <!--&lt;!&ndash;指定数据类型 &ndash;&gt;-->
                <!--<data android:scheme="package"/>-->
                <!--&lt;!&ndash;连接充电器 &ndash;&gt;-->
                <!--<action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>-->
                <!--&lt;!&ndash;断开充电器 &ndash;&gt;-->
                <!--<action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>-->
                <!--&lt;!&ndash;充电完成 &ndash;&gt;-->
                <!--<action android:name="android.intent.action.BATTERY_OKAY"/>-->
                <!--&lt;!&ndash;电量低 &ndash;&gt;-->
                <!--<action android:name="android.intent.action.BATTERY_LOW"/>-->
                <!--&lt;!&ndash;开机启动 &ndash;&gt;-->
                <!--<action android:name="android.intent.action.BOOT_COMPLETED"/>-->
            <!--</intent-filter>-->
        </receiver>
    </application>
 
</manifest>

D许咚 2019-05-16

源自：广播接收者 4-1 自定义广播（重点）

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3回答

好帮手慕雪回答被采纳获得+3积分 2019-05-17 10:35:49

1）你把addDataScheme（）删除掉就可以收到自定义的广播了。如果加上的话，是要求广播中还要有DataScheme并且符合你的规则。2）但是例如删除APP这个系统广播，如果你不带addDataScheme（）则会接收不到这个系统广播。3）要想两者都接收到，你就需要定义多个广播接收器了。祝：学习愉快

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D许咚提问者 #1

谢谢，果然是这样！

2019-05-17 22:51:46

提问者 D许咚 2019-05-16 19:33:00

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=".MainActivity"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp">
 
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="请输入广播内容："
        />
    <EditText
        android:id="@+id/et_broadcast_content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:lines="2"
        />
    <Button
        android:id="@+id/btn_send_broadcast"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="发送广播"/>
    <TextView
        android:id="@+id/tv_received_broadcast"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="接收到的广播内容:"/>
 
</LinearLayout>