[经验]

RK3288添加系统广播的步骤

张龙祥

2022-9-23 17:17:09

5729 RK3288 Android系统 JAVA语言

可在自己需要的位置注册接受广播的action，这边是注册在Intent上。

1.添加action字符串

修改位置

frameworks/base/core/java/android/content/Intent.java

/**

*@hide

@hide必须要加

**/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)

public static final String ACTION_demo="android.intent.action.demo";

2 注册该广播

修改位置

frameworks/base/core/res/AndroidManifest.xml

在需要的地方发送广播

Intent intent = new Intent(Intent.ACTION_demo);

```
intent.putExtra("state",state);
```
```
sendBroadcastToAll(intent);
```
private void sendBroadcastToAll(Intent intent) {

intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);

intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);

final long ident = Binder.clearCallingIdentity();

```
try {
```

mContext.sendBroadcastAsUser(intent, UserHandle.ALL);

```
} finally {
```
```
Binder.restoreCallingIdentity(ident);
```
```
}
```
}

3.可在系统中写个接收的广播，此例中，添加一个服务，在服务中注册接收广播

新建服务：

在frameworks/base/packages/SystemUI/src/com/android/systemui/文件夹新建一个自己的目录，新建一个服务。
eg:frameworks/base/packages/SystemUI/src/com/android/systemui/test/TestService.java

+package com.android.systemui.test;
+
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.IBinder;
+import android.util.Log;
+
+
+public class TestService extends Service {
+

private static final String TAG = "TestService";
private SwitchAppReceiver receiver;
@Override
public void onCreate() {
```
super.onCreate();
```
```
Log.i(TAG,"TestService oncreate");
```
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {

Log.i(TAG,"TestService onStartCommand");

```
registerReceiver();
```

return super.onStartCommand(intent, flags, startId);

}
@Override
public IBinder onBind(Intent intent) {
```
return null;
```
}
@Override
public void onDestroy() {
```
Log.i(TAG,"TestService onDestroy");
```
```
unRegistReceiver();
```
```
super.onDestroy();
```
}
private void registerReceiver() {
```
receiver = new SwitchAppReceiver();
```

IntentFilter filter = new IntentFilter();

filter.addAction(Intent.ACTION_TES_SWITCH_APP);

```
registerReceiver(receiver, filter);
```
}
private void unRegistReceiver() {
```
try {
```
```
this.unregisterReceiver(receiver);
```
```
} catch (Exception e) {
```
```
}
```
}
+}

新建广播

eg:frameworks/base/packages/SystemUI/src/com/android/systemui/test/SwitchAppReceiver.java

+package com.android.systemui.test;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.PackageManager;
+import android.util.Log;
+
+public class SwitchAppReceiver extends BroadcastReceiver {
+

public static final String TAG = "swith_app";
@Override
public void onReceive(Context context, Intent intent) {

Log.i(TAG, "SwitchAppReceiver onReceive==");

//do something
}

4.在合适的地方开启服务

frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java

public PhoneStatusBarPolicy(Context context, StatusBarIconController iconController) {
/* start test switch app */
Log.d("TestService","##################");
Intent mIntent = new Intent(mContext,TesService.class);
mContext.startService(mIntent);
}

原作者：hxy_sakura