一、smali目錄下新建crack.smali，內容如下：

.class public Lcrack;

.super Ljava/lang/Object;

.source "crack.java"

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.method public static log1(Ljava/lang/String;)V #打印出info 1字符串

? ? .locals 1

? ? .prologue

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? ? const-string v0, "crack_log_str"

? ? invoke-static {v0, p0}, Landroid/util/Log;->d(Ljava/lang/String;Ljava/lang/String;)I

? ? return-void

.end method

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.method public static I(I)V ? #打印出int型值

? ? .locals 2

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? ? .prologue

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? ? const-string v0, "crack_log_int"

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? ? invoke-static {p0}, Ljava/lang/String;->valueOf(I)Ljava/lang/String;

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? ? move-result-object v1

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? ? invoke-static {v0, v1}, Landroid/util/Log;->d(Ljava/lang/String;Ljava/lang/String;)I

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? ? return-void

.end method

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.method public static J(J)V #打印出long類型的值

.locals 2

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.prologue

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const-string v0, "crack_log_long"

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invoke-static {p0, p1}, Ljava/lang/String;->valueOf(J)Ljava/lang/String;

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move-result-object v1

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invoke-static {v0, v1}, Landroid/util/Log;->d(Ljava/lang/String;Ljava/lang/String;)I

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return-void

.end method

二、使用方法（打印String）：

invoke-static {v1}, Lcrack;->log1(Ljava/lang/String;)V

三、有時日志太多，要寫入文件分析：

.class public Lcrack2;

.super Ljava/lang/Object;

.source "crack2.java"

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.method public static puts(Ljava/lang/String;)V

? ? .locals 7

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? ? .prologue

? ? :try_start_0

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? ? const-string v3, "/sdcard/crack/debug.log"

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? ? new-instance v2, Ljava/io/FileOutputStream;

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? ? const/4 v5, 0x1

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? ? invoke-direct {v2, v3, v5}, Ljava/io/FileOutputStream;-><init>(Ljava/lang/String;Z)V

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? ? .line 19

? ? new-instance v4, Ljava/io/OutputStreamWriter;

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? ? const-string v5, "gb2312"

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? ? invoke-direct {v4, v2, v5}, Ljava/io/OutputStreamWriter;-><init>(Ljava/io/OutputStream;Ljava/lang/String;)V

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? ? .line 21

? ? invoke-virtual {v4, p0}, Ljava/io/OutputStreamWriter;->write(Ljava/lang/String;)V

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? ? const-string v5, "\r\n"

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? ? invoke-virtual {v4, v5}, Ljava/io/OutputStreamWriter;->write(Ljava/lang/String;)V

? ? .line 23

? ? invoke-virtual {v4}, Ljava/io/OutputStreamWriter;->flush()V

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? ? .line 25

? ? invoke-virtual {v4}, Ljava/io/OutputStreamWriter;->close()V

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? ? .line 27

? ? invoke-virtual {v2}, Ljava/io/FileOutputStream;->close()V

? ? :try_end_0

? ? .catch Ljava/lang/Exception; {:try_start_0 .. :try_end_0} :catch_0

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? ? .line 37

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? ? :cond_0

? ? :goto_0

? ? return-void

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? ? .line 30

? ? :catch_0

? ? move-exception v0

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? ? .line 34

? ? const-string v5, "debug"

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? ? const-string v6, "file write error"

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? ? invoke-static {v5, v6}, Landroid/util/Log;->e(Ljava/lang/String;Ljava/lang/String;)I

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? ? goto :goto_0

.end method

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#使用方法：invoke-static {vx}, Lcrack2;->puts(Ljava/lang/String;)V

轉載于:https://www.cnblogs.com/gm-201705/p/9864074.html

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