如何在应用程序处于开发模式时打印日志？

Question

我需要在开发时打印我的应用程序中的日志。那么是否有一种类似布尔值的方式来决定我的应用程序是否处于某种模式，只允许打印日志呢？每次我准备签名版本时，这将节省我删除日志的时间。

我试过像以下解决方案

boolean isDebuggable = 0 != (getApplicationInfo().flags &= ApplicationInfo.FLAG_DEBUGGABLE);

和：

if (BuildConfig.DEBUG) {
  // do something for a debug build
}`

他们不像我想要的那样工作。

谢谢。

Answer 1

只需使用这样的静态变量debug：

if(debug){
//do something
}

并在释放apk文件时将debug设置为false。

或者创建自己的自定义日志方法：

public static void logInfo(String tag, String msg){
    if(DEBUG){
        Log.i(tag,msg);
    }
}

Answer 2

如果您使用的是Android Studio，请尝试使用gradle文件。

  defaultConfig {
        applicationId "com.your.application.id"
        minSdkVersion 14
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"

        //Defining Log debugging
        buildConfigField "boolean", "LOG_DEBUG_MODE", "false"
        buildConfigField "boolean", "LOG_DEBUG_WITH_STACKTRACE_MODE", "false"
    }


    buildTypes {
        debug {
            testCoverageEnabled = "true"
            buildConfigField "boolean", "LOG_DEBUG_MODE", "true"
            buildConfigField "boolean", "LOG_DEBUG_WITH_STACKTRACE_MODE", "true"
        }

        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

Answer 3

无论哪种方式，您都可以使用静态单一方法打印日志，如下所示：

/**
 * @param TAG
 * @param Message
 * @param LogType
 */
public static void Log(String TAG, String Message, int LogType) {
    switch (LogType) {
        // Case 1- To Show Message as Debug
        case 1:
            Log.d(TAG, Message);
            break;
        // Case 2- To Show Message as Error
        case 2:
            Log.e(TAG, Message);
            break;
        // Case 3- To Show Message as Information
        case 3:
            Log.i(TAG, Message);
            break;
        // Case 4- To Show Message as Verbose
        case 4:
            Log.v(TAG, Message);
            break;
        // Case 5- To Show Message as Assert
        case 5:
            Log.w(TAG, Message);
            break;
        // Case Default- To Show Message as System Print
        default:
            System.out.println(Message);
            break;
    }
}

public static void Log(String TAG, String Message) {
    AppDelegate.Log(TAG, Message, 1);
}

/* Function to show log for error message */
public static void LogD(String Message) {
    AppDelegate.Log(Tags.DATE, "" + Message, 1);
}

/* Function to show log for error message */
public static void LogDB(String Message) {
    AppDelegate.Log(Tags.DATABASE, "" + Message, 1);
}

/* Function to show log for error message */
public static void LogE(Exception e) {
    if (e != null) {
        AppDelegate.LogE(e.getMessage());
        e.printStackTrace();
    } else {
        AppDelegate.Log(Tags.ERROR, "exception object is also null.", 2);
    }
}

/* Function to show log for error message */
public static void LogE(OutOfMemoryError e) {
    if (e != null) {
        AppDelegate.LogE(e.getMessage());
        e.printStackTrace();
    } else {
        AppDelegate.Log(Tags.ERROR, "exception object is also null.", 2);
    }
}

/* Function to show log for error message */
public static void LogE(String message, Exception exception) {
    if (exception != null) {
        AppDelegate.LogE("from = " + message + " => "
                + exception.getMessage());
        exception.printStackTrace();
    } else {
        AppDelegate.Log(Tags.ERROR, "exception object is also null. at "
                + message, 2);
    }
}

/**
 * Funtion to log with tag RESULT, you need to just pass the message.
 *
 * @String Message = pass your message that you want to log.
 */
public static void LogR(String Message) {
    AppDelegate.Log(Tags.RESULT, "" + Message, 1);
}

/**
 * Funtion to log with tag RESULT, you need to just pass the message.
 *
 * @String Message = pass your message that you want to log.
 */
public static void LogI(String Message) {
    AppDelegate.Log(Tags.INTERNET, "" + Message, 1);
}

之后你只需要为登录应用程序编写如下：

AppDelegate.LogT("Hello for testing purpose");

当你不想显示日志然后转到AppDelegate类并注释掉日志行。而已。我希望你明白。