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, " "

    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