在android中service启动异常

记录一下开发中遇到的问题：

用intent开启一个service时

Intent intent = new Intent("com.ryg.MessengerService.launch");
bindService(intent, mConnection, Context.BIND_AUTO_CREATE);

出现如下错误：

Caused by: java.lang.IllegalArgumentException: Service Intent must be explicit: Intent { act=com.ryg.MessengerService.launch }
                                                                       at android.app.ContextImpl.validateServiceIntent(ContextImpl.java:1847)
                                                                       at android.app.ContextImpl.bindServiceCommon(ContextImpl.java:1946)
                                                                       at android.app.ContextImpl.bindService(ContextImpl.java:1924)
                                                                       at android.content.ContextWrapper.bindService(ContextWrapper.java:539)
                                                                       at com.ryg.chapter_2.messenger.MessengerActivity.onCreate(MessengerActivity.java:64)

此时解决办法是：

        Intent mIntent = new Intent();
        mIntent.setAction("com.ryg.MessengerService.launch");//你定义的service的name
        mIntent.setPackage(getPackageName());//这里你需要设置你应用的包名
        bindService(mIntent, mConnection, Context.BIND_AUTO_CREATE);

原因：android5.0之后service的开启必须是显示的开启

分析源码：

    private void validateServiceIntent(Intent service) {
            if (service.getComponent() == null && service.getPackage() == null) {
                if (getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP) {
                    IllegalArgumentException ex = new IllegalArgumentException(
                            "Service Intent must be explicit: " + service);
                    throw ex;
                } else {
                    Log.w(TAG, "Implicit intents with startService are not safe: " + service
                            + " " + Debug.getCallers(2, 3));
                }
            }
        }