如何将BroadCast从一个应用程序发送到另一个应用程序

问题描述：

我有App A和AppB.在App A中，我想向App B发送广播. 这是App A的代码:

I have App A and App B. In App A I want to send broadcast to App B. This is the code for App A:

final Intent intent = new Intent();
intent.setAction("com.pkg.perform.Ruby");
intent.putExtra("KeyName", "code1id");
intent.setComponent(new ComponentName("com.pkg.AppB", "com.pkg.AppB.MainActivity"));
sendBroadcast(intent);

在App B中-在MainActivity中，我有MyBroadCastReceiver类.

And in App B - In MainActivity, I have MyBroadCastReceiver Class.

public class MainActivity extends Activity {
    private MyBroadcastReceiver MyReceiver;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Receive broadcast from External App
        IntentFilter intentFilter = new IntentFilter("com.pkg.perform.Ruby");
        MyReceiver = new MyBroadcastReceiver();
        if(intentFilter != null)
        {
            registerReceiver(MyReceiver, intentFilter);
        }
    }

    public class MyBroadcastReceiver extends BroadcastReceiver
    {
        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(MainActivity.this, "Data Received from External App", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(MyReceiver != null)
            unregisterReceiver(MyReceiver);
    }
}

我遇到错误-接收器未注册.

答

第一件事首先是在清单文件中的应用B中声明接收方，如下所示:

First thing first declare the receiver in app B in the manifest file like this:

<receiver android:name=".MyBroadcastReceiver"
    android:enabled="true"
    android:exported="true">
        <intent-filter>
          <action android:name="com.pkg.perform.Ruby" />
        </intent-filter>
</receiver>

在向目标发送广播时添加FLAG_INCLUDE_STOPPED_PACKAGES标志 [src] ，因为当您从应用程序A广播到应用程序B时，应用程序B可能没有运行，此标志可确保即使没有运行的应用程序也可以广播该广播:

when sending the broadcast add FLAG_INCLUDE_STOPPED_PACKAGES flag to the intent [src] because when you broadcast from app A to app B , app B might not be running, this flag insures that the broadcast reachs out even apps not running:

FLAG_INCLUDE_STOPPED_PACKAGES标志已添加到意图中发送以表明该意图将被允许启动一个已停止的应用程序的组件.

FLAG_INCLUDE_STOPPED_PACKAGES flag is added to the intent before it is sent to indicate that the intent is to be allowed to start a component of a stopped application.

intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);

在您的情况下，将是这样:

In your case it will be like this:

    final Intent intent=new Intent();
    intent.setAction("com.pkg.perform.Ruby");
    intent.putExtra("KeyName","code1id");
    intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);
    intent.setComponent(  
        new ComponentName("com.pkg.AppB","com.pkg.AppB.MyBroadcastReceiver"));  
    sendBroadcast(intent);

如何将BroadCast从一个应用程序发送到另一个应用程序

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