Smali插桩打日志

一、smali目录下新建crack.smali，内容如下：

.class public Lcrack;

.super Ljava/lang/Object;

.source "crack.java"

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

.locals 1

.prologue

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

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

.locals 2

.prologue

const-string v0, "crack_log_int"

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

move-result-object v1

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

return-void

.end method

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

.locals 2

.prologue

const-string v0, "crack_log_long"

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

move-result-object v1

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

return-void

.end method

二、使用方法（打印String）：

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

三、有时日志太多，要写入文件分析：

.class public Lcrack2;

.super Ljava/lang/Object;

.source "crack2.java"

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

.locals 7

.prologue

:try_start_0

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

new-instance v2, Ljava/io/FileOutputStream;

const/4 v5, 0x1

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

.line 19

new-instance v4, Ljava/io/OutputStreamWriter;

const-string v5, "gb2312"

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

.line 21

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

const-string v5, "\r\n"

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

.line 23

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

.line 25

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

.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

.line 37

:cond_0

:goto_0

return-void

.line 30

:catch_0

move-exception v0

.line 34

const-string v5, "debug"

const-string v6, "file write error"

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

goto :goto_0

.end method

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