打开“Application->app->proguard-rules.pro” 在proguard-rules.pro '中输入以下代码 android.util.Log { 公共静态*** d(…); 公共静态*** v(…); 公共静态*** w(…); 公共静态*** i(…); 公共静态*** e(…); ｝

#你可以删除特定的调试类，如果你想在日志中的调试类型错误

In build.gradle(app) ->android do this thing buildTypes { debug{ debuggable false minifyEnabled true shrinkResources true proguardFiles getDefaultProguardFile('proguard-android- optimize.txt'), 'proguard-rules.pro' } release { debuggable false minifyEnabled true shrinkResources true proguardFiles getDefaultProguardFile('proguard-android- optimize.txt'), 'proguard-rules.pro' } } lintOptions { checkReleaseBuilds false // Or, if you prefer, you can continue to check for errors in release builds, // but continue the build even when errors are found: abortOnError false }

我在谷歌IO示例应用程序中使用了LogUtils类。我将其修改为使用特定于应用程序的DEBUG常量而不是BuildConfig。因为BuildConfig. DEBUG。DEBUG不可靠。然后在我的课程中，我有以下内容。

import static my.app.util.LogUtils.makeLogTag;
import static my.app.util.LogUtils.LOGV;

public class MyActivity extends FragmentActivity {
  private static final String TAG = makeLogTag(MyActivity.class);

  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    LOGV(TAG, "my message");
  }
}

克里斯托弗的Proguard解决方案是最好的，但如果因为任何原因你不喜欢Proguard，这里有一个非常低技术含量的解决方案:

评论日志:

find . -name "*\.java" | xargs grep -l 'Log\.' | xargs sed -i 's/Log\./;\/\/ Log\./g'

取消日志:

find . -name "*\.java" | xargs grep -l 'Log\.' | xargs sed -i 's/;\/\/ Log\./Log\./g'

一个限制是您的日志记录指令不能跨越多行。

(在项目根的UNIX shell中执行这些行。如果使用Windows，请使用UNIX层或使用等效的Windows命令)

最简单的方法;

使用DebugLog

当应用程序发布时，DebugLog会禁用所有日志。

https://github.com/MustafaFerhan/DebugLog

我建议在某个地方使用一个静态布尔值来指示是否记录日志:

class MyDebug {
  static final boolean LOG = true;
}

然后无论你想在哪里登录你的代码，只需要这样做:

if (MyDebug.LOG) {
  if (condition) Log.i(...);
}

现在，当你将MyDebug.LOG设置为false时，编译器将剔除这些检查中的所有代码(因为它是一个静态final，它在编译时知道代码没有被使用)。

对于较大的项目，您可能希望开始在单个文件中使用布尔值，以便能够根据需要轻松启用或禁用日志记录。例如，这些是我们在窗口管理器中拥有的各种日志常量:

static final String TAG = "WindowManager";
static final boolean DEBUG = false;
static final boolean DEBUG_FOCUS = false;
static final boolean DEBUG_ANIM = false;
static final boolean DEBUG_LAYOUT = false;
static final boolean DEBUG_RESIZE = false;
static final boolean DEBUG_LAYERS = false;
static final boolean DEBUG_INPUT = false;
static final boolean DEBUG_INPUT_METHOD = false;
static final boolean DEBUG_VISIBILITY = false;
static final boolean DEBUG_WINDOW_MOVEMENT = false;
static final boolean DEBUG_ORIENTATION = false;
static final boolean DEBUG_APP_TRANSITIONS = false;
static final boolean DEBUG_STARTING_WINDOW = false;
static final boolean DEBUG_REORDER = false;
static final boolean DEBUG_WALLPAPER = false;
static final boolean SHOW_TRANSACTIONS = false;
static final boolean HIDE_STACK_CRAWLS = true;
static final boolean MEASURE_LATENCY = false;

对应代码如下:

    if (DEBUG_FOCUS || DEBUG_WINDOW_MOVEMENT) Log.v(
        TAG, "Adding window " + window + " at "
        + (i+1) + " of " + mWindows.size() + " (after " + pos + ")");

Per android.util.Log提供了一种启用/禁用日志的方法:

public static native boolean isLoggable(String tag, int level);

默认情况下，isLoggable(…)方法返回false，只有在你在设备中设置prop后，像这样:

adb shell setprop log.tag.MyAppTag DEBUG

这意味着DEBUG级别以上的任何日志都可以打印出来。参考android文档:

Checks to see whether or not a log for the specified tag is loggable at the specified level. The default level of any tag is set to INFO. This means that any level above and including INFO will be logged. Before you make any calls to a logging method you should check to see if your tag should be logged. You can change the default level by setting a system property: 'setprop log.tag. ' Where level is either VERBOSE, DEBUG, INFO, WARN, ERROR, ASSERT, or SUPPRESS. SUPPRESS will turn off all logging for your tag. You can also create a local.prop file that with the following in it: 'log.tag.=' and place that in /data/local.prop.

所以我们可以使用自定义log util:

public final class Dlog 
{
    public static void v(String tag, String msg)
    {
        if (Log.isLoggable(tag, Log.VERBOSE))
            Log.v(tag, msg);
    }

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

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

    public static void w(String tag, String msg)
    {
        if (Log.isLoggable(tag, Log.WARN))
            Log.w(tag, msg);
    }

    public static void e(String tag, String msg)
    {
        if (Log.isLoggable(tag, Log.ERROR))
            Log.e(tag, msg);
    }
}