ADF_214：使用Logger设置和查看Android应用的调试信息

开发运行环境：JDeveloper 11.1.2.4 + Android SDK r21.1

Debug Android手机应用一般用来检查比较难的问题，一般问题通过查看日志信息就可以解决。

1. 在Application Resources->Descriptors->META-INF中，找到logging.prcoperties文件，设置日志级别
比如把如下Package的级别从默认的SEVERE改为INFO：
（1）oracle.adfmf.util.logging.ConsoleHandler.level=INFO
（2）oracle.adfmf.framework.level=INFO

（3）oracle.adfmf.application.level=INFO

2. 修改Managed Bean，增加Logger语句

package mycomp.mobile;

import com.sun.util.logging.Level;

import com.sun.util.logging.Logger;

import oracle.adf.model.datacontrols.device.DeviceManager;

import oracle.adf.model.datacontrols.device.DeviceManagerFactory;

import oracle.adfmf.amx.event.ActionEvent;

import oracle.adfmf.util.Utility;

public class BackingPic {

    public BackingPic() {

    }

    public void sendEmail(ActionEvent actionEvent) {

        System.out.println("This is logging test from System.out.println()");

        

        Logger.getLogger(Utility.APP_LOGNAME).logp(Level.INFO, this.getClass().getName(), "Logger","This is logging test from Logger");

        // Add event code here...

        DeviceManager deviceManager = DeviceManagerFactory.getDeviceManager();

        //deviceManager.sendEmail("ping.ma@oracle.com", "", "An Email", "Hello from me.", "", "", "");

        deviceManager.sendEmail("maping930883@hotmail.com", "", "An Email", "Hello from me.", "", "", "");

    }

}

注意，使用System.out.println()方式打印信息适用临时查看信息，建议还是使用Logger打印调试信息。 

3. 在命令窗口下，进入C:\Program Files (x86)\Android\android-sdk\tools，运行ddms.bat

可以看到，打印出了 System.out.println和Logger语句信息：

05-15 03:09:52.116: D/CVM(1205): ######## This is logging test from System.out.println()
05-15 03:09:52.156: D/CVM(1205): [INFO - oracle.adfmf.application - BackingPic - Logger] ######## This is logging test from Logger

参考文献：
1. http://www.youtube.com/watch?v=5yyY7_U6GgY
2. https://blogs.oracle.com/shay/entry/adf_mobile_logging_on_android