将消息添加到Smali文件或将Java转换为Smali

Question

嗨，我想在这个Smali文件中添加一个消息，但我不理解它是如何工作的。我不能将我的Java代码转换成Smali。

我想要显示我的V2变量。我尝试了一下: invoke-virtual {v2}，Landroid/widget/Toast;->show()V

但是不工作..。应用程序在启动时崩溃。谢谢你，我非常感谢你的帮助！

Entery代码：

.class public final Lcom/sube/subemobileclient/b/b/b/b/b/a$a;
.super Ljava/lang/Object;


# annotations
.annotation system Ldalvik/annotation/EnclosingClass;
    value = Lcom/sube/subemobileclient/b/b/b/b/b/a;
.end annotation

.annotation system Ldalvik/annotation/InnerClass;
    accessFlags = 0x9
    name = "a"
.end annotation


# instance fields
.field public a:B

.field public b:B

.field public c:[B


# direct methods
.method public constructor <init>()V
    .locals 0

    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method public constructor <init>(BB[B)V
    .locals 0

    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    iput-byte p1, p0, Lcom/sube/subemobileclient/b/b/b/b/b/a$a;->a:B

    iput-byte p2, p0, Lcom/sube/subemobileclient/b/b/b/b/b/a$a;->b:B

    iput-object p3, p0, Lcom/sube/subemobileclient/b/b/b/b/b/a$a;->c:[B

    return-void
.end method


# virtual methods
.method public final toString()Ljava/lang/String;
    .locals 3

    new-instance v0, Ljava/lang/StringBuilder;

    invoke-direct {v0}, Ljava/lang/StringBuilder;-><init>()V

    new-instance v1, Ljava/lang/StringBuilder;

    const-string v2, "Sector: "

    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

    iget-byte v2, p0, Lcom/sube/subemobileclient/b/b/b/b/b/a$a;->a:B

    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(I)Ljava/lang/StringBuilder;

    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v1

    invoke-virtual {v0, v1}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    const-string v1, "line.separator"

    invoke-static {v1}, Ljava/lang/System;->getProperty(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v1

    invoke-virtual {v0, v1}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    new-instance v1, Ljava/lang/StringBuilder;

    const-string v2, "Key Type: "

    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

    iget-byte v2, p0, Lcom/sube/subemobileclient/b/b/b/b/b/a$a;->b:B

    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(I)Ljava/lang/StringBuilder;

    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v1

    invoke-virtual {v0, v1}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    const-string v1, "line.separator"

    invoke-static {v1}, Ljava/lang/System;->getProperty(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v1

    invoke-virtual {v0, v1}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    new-instance v1, Ljava/lang/StringBuilder;

    const-string v2, "Key: "

    invoke-direct {v1, v2}, Ljava/lang/StringBuilder;-><init>(Ljava/lang/String;)V

    iget-object v2, p0, Lcom/sube/subemobileclient/b/b/b/b/b/a$a;->c:[B

    invoke-static {v2}, Ljava/util/Arrays;->toString([B)Ljava/lang/String;





    **HEREHEREHERE**  So message to display = "Key: ...." 




    move-result-object v2

    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    invoke-virtual {v1}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v1

    invoke-virtual {v0, v1}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    const-string v1, "line.separator"

    invoke-static {v1}, Ljava/lang/System;->getProperty(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v1

    invoke-virtual {v0, v1}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    invoke-virtual {v0}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v0

.end method

JAVA

   public final String toString() {
        StringBuilder stringBuilder = new StringBuilder();
        StringBuilder stringBuilder2 = new StringBuilder("Sector: ");
        stringBuilder2.append(this.f892a);
        stringBuilder.append(stringBuilder2.toString());
        stringBuilder.append(System.getProperty("line.separator"));
        stringBuilder2 = new StringBuilder("Key Type: ");
        stringBuilder2.append(this.f893b);
        stringBuilder.append(stringBuilder2.toString());
        stringBuilder.append(System.getProperty("line.separator"));
        stringBuilder2 = new StringBuilder("Key: ");
        stringBuilder2.append(Arrays.toString(this.f894c));
        stringBuilder.append(stringBuilder2.toString());
        stringBuilder.append(System.getProperty("line.separator"));
        return stringBuilder.toString();
    }

Answer 1

您可以从Java生成Smali代码，就像从任何Android应用程序生成代码一样。因此，您可以简单地编写一个包含您的代码的非常小的Android应用程序。

在包含代码的AndroidStudio中创建一个简单的应用程序。使用apktool构建应用程序并反编译apk文件，您就可以将Java代码转换为Smali代码。

最简单的方法应该是创建一个新函数，然后可以将其注入到现有的Smali代码中，并从现有的函数中调用。

或者使用相同的方式，但使用一些快捷方式：

.java --> .class --> dex -> smali

将Java编译成一个类文件(在此之前，您必须使用Java7作为目标)。然后使用Android SDK中的dx (java -jar dx.jar)工具将代码转换为dex文件。最后用apktool进行反编译。