private BroadcastReceiver Broadcast = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); assert action != null; if (action.equals(Datawedeentity.EXTRA_RESULT_GET_ACTIVE_PROFILE)) { if (intent.hasExtra(Datawedeentity.EXTRA_RESULT_GET_ACTIVE_PROFILE)) { String activeProfile = intent.getStringExtra(Datawedeentity.EXTRA_RESULT_GET_ACTIVE_PROFILE); } } if (action.equals(Datawedeentity.ACTIVITY_INTENT_FILTER_ACTION)) { displayScanResult(intent, "via Broadcast"); } } };
时间: 2024-02-14 07:18:39 浏览: 98
这段代码定义了一个名为 `Broadcast` 的 BroadcastReceiver 对象。当接收到广播时,`onReceive()` 方法将被调用。在这个方法中,首先获取广播的 action,然后根据 action 的值进行不同的处理。如果接收到的是 `Datawedeentity.EXTRA_RESULT_GET_ACTIVE_PROFILE` 的广播,就从 intent 中获取额外信息 `Datawedeentity.EXTRA_RESULT_GET_ACTIVE_PROFILE` 的值,并存储在 `activeProfile` 变量中。如果接收到的是 `Datawedeentity.ACTIVITY_INTENT_FILTER_ACTION` 的广播,就调用 `displayScanResult()` 方法,并将 intent 和字符串 "via Broadcast" 作为参数传递。这段代码的作用是接收广播,并根据广播的不同 action 做出不同的响应。
相关问题
修改下面代码,使得com.wing.MyBroadcastReceiver监听到广播android.intent.action.TEST_BROADCAST的时候启用com.modemdug.ModemDumpCollectservice,而不是com.wing.ModemDebugService package com.example.myapplication; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.os.Handler; import android.util.Log; public class MyBroadcastReceiver extends BroadcastReceiver { private static final String TAG = "MyBroadcastReceiver"; private static final int SERVICE_STOP_DELAY = 1* 60 * 1000; // 5分钟 private Context mContext; private Handler mHandler = new Handler(); private Runnable mStopServiceRunnable = new Runnable() { @Override public void run() { stopModemDebugService(); } }; @Override public void onReceive(Context context, Intent intent) { mContext = context; // TODO Auto-generated method stub if(null == context){ return; } Log.d(TAG, "onReceive: " + intent.getAction()); if (intent.getAction().equals("android.intent.action.TEST_BROADCAST")) { startModemDebugService(); mHandler.postDelayed(mStopServiceRunnable, SERVICE_STOP_DELAY); } } private void startModemDebugService() { Intent intent = new Intent(mContext, ModemDebugService.class); Log.d(TAG,"receiver ACTION BOOT COMPLETED"); Log.d(TAG,"Globle version start ModemDebugservie"); mContext.startService(intent); Log.i(TAG,"startService ModemDebug Service"); } private void stopModemDebugService() { Intent intent = new Intent(mContext, ModemDebugService.class); Log.d(TAG,"receiver tiemr out ACTION BOOT COMPLETED"); Log.d(TAG,"Globle version end ModemDebugservie"); mContext.stopService(intent); Log.i(TAG,"StopService ModemDebug Service"); } }
请将以下代码替换为 `startModemDebugService()` 方法:
```java
private void startModemDebugService() {
Intent intent = new Intent("com.modemdug.ModemDumpCollectservice");
Log.d(TAG, "receiver ACTION TEST_BROADCAST");
Log.d(TAG, "Globle version start ModemDumpCollectservice");
mContext.startService(intent);
Log.i(TAG, "startService ModemDumpCollectservice");
}
```
这将使用 `Intent` 启动名称为 `com.modemdug.ModemDumpCollectservice` 的服务。
Android广播的使用方法private BrocasterReceiver basebandReceiver =new BrocasterReceiver(){ @Override
Android中的广播(Broadcast Receiver)是一种处理系统事件或应用间通信的方式。它允许一个组件接收并响应其他组件发送的消息,通常用于更新UI、处理系统级别的操作等。使用BroadcastReceiver的步骤如下:
1. **创建BroadcastReceiver类**:
你提到的`BrocasterReceiver`应该是`BroadcastReceiver`类的实例化,你需要定义一个继承自`BroadcastReceiver`的自定义类,并覆盖`onReceive()`方法,这个方法会在接收到特定的广播事件时被调用。
```java
public class BasebandReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// 这里编写你的业务逻辑,根据intent的数据处理相应的行为
String action = intent.getAction();
if (action.equals(BROADCAST_ACTION)) {
// 执行相关操作...
}
}
}
```
2. **注册Receiver**:
在需要监听广播的地方,通过`registerReceiver()`方法注册你的BroadcastReceiver,提供一个意图过滤器(IntentFilter)来指定接收哪种类型的广播。
```java
IntentFilter filter = new IntentFilter();
filter.addAction(BROADCAST_ACTION);
Context.registerReceiver(basebandReceiver, filter);
```
3. **发送广播**:
其他组件如果想发送一个广播,可以使用`sendBroadcast()`或`sendOrderedBroadcast()`方法,传入包含所需数据的Intent。
4. **注销Receiver**:
当不再需要接收广播时,记得通过`unregisterReceiver()`方法取消注册,避免内存泄漏。
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