java - Android-如何将数据从 Activity 发送到服务？

Question

在我的应用程序中，我试图将数据从我的 MainActivity.class 发送到名为 bgservice.class 的服务。这是我的以下代码:

MainActivity.class:

public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  Intent serviceIntent = new Intent(bgservice.class.getName());
  serviceIntent.putExtra("UserID", "123456");
  this.startService(serviceIntent);
}

bgservice.class:

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

  String userID = intent.getStringExtra("userID");
  System.out.println(userID);
  Toast.makeText(this,userID, Toast.LENGTH_LONG).show();
  return START_STICKY;

}

但我没有在服务类中获取数据。这些是我得到的以下错误:

02-25 09:05:41.166: E/AndroidRuntime(2633):

java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.microapple.googleplace/com.microapple.googleplace. MainActivity}: java.lang.IllegalArgumentException: Service Intent must be explicit: Intent { act=com.microapple.googleplace.bgservice (has extras) }

AndroidManifest.xml:

     ...
    <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >

    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >



        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <service android:enabled="true" android:name=".bgservice" />
</application>
....

Answer 1

Intent serviceIntent = new Intent(YourActivity.this, bgservice.class);
        serviceIntent.putExtra("UserID", "123456");
        this.startService(serviceIntent);

在您的服务中，

public int onStartCommand(Intent intent, int flags, int startId) {

    String userID = intent.getStringExtra("UserID");

    //do something

    return START_STICKY;

}

这一定有效。