Smali语法解析

作者: Erich_Godsen | 来源:发表于2021-03-19 09:55 被阅读0次

Smali语言是什么？

Smali是Dalvik的寄存器语言，Smali代码是安卓Apk反编译而来的，大家可以通过ApkTool这个工具来反编译App得到对应的Smali语言，或者在 Android Studio中安装java2smail这个插件，安装成功后选择Build->Compile to Smali来编译生成对应的Smali文件

代码示例

源文件如下

public class SurfaceRenderView extends SurfaceView implements IRenderView {
    private MeasureHelper mMeasureHelper;

    public SurfaceRenderView(Context context) {
        super(context);
        initView(context);
    }

    public SurfaceRenderView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView(context);
    }

    public SurfaceRenderView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initView(context);
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public SurfaceRenderView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        initView(context);
    }

    private void initView(Context context) {
        mMeasureHelper = new MeasureHelper(this);
        mSurfaceCallback = new SurfaceCallback(this);
        getHolder().addCallback(mSurfaceCallback);
        //noinspection deprecation
        getHolder().setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
    }

    @Override
    public View getView() {
        return this;
    }

    @Override
    public boolean shouldWaitForResize() {
        return true;
    }

    //--------------------
    // Layout & Measure
    //--------------------
    @Override
    public void setVideoSize(int videoWidth, int videoHeight) {
        if (videoWidth > 0 && videoHeight > 0) {
            mMeasureHelper.setVideoSize(videoWidth, videoHeight);
            getHolder().setFixedSize(videoWidth, videoHeight);
            requestLayout();
        }
    }

    @Override
    public void setVideoSampleAspectRatio(int videoSarNum, int videoSarDen) {
        if (videoSarNum > 0 && videoSarDen > 0) {
            mMeasureHelper.setVideoSampleAspectRatio(videoSarNum, videoSarDen);
            requestLayout();
        }
    }

    @Override
    public void setVideoRotation(int degree) {
        Log.e("", "SurfaceView doesn't support rotation (" + degree + ")!\n");
    }

    @Override
    public void setAspectRatio(int aspectRatio) {
        mMeasureHelper.setAspectRatio(aspectRatio);
        requestLayout();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        mMeasureHelper.doMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(mMeasureHelper.getMeasuredWidth(), mMeasureHelper.getMeasuredHeight());
    }

    //--------------------
    // SurfaceViewHolder
    //--------------------

    private static final class InternalSurfaceHolder implements IRenderView.ISurfaceHolder {
        private SurfaceRenderView mSurfaceView;
        private SurfaceHolder mSurfaceHolder;

        public InternalSurfaceHolder(@NonNull SurfaceRenderView surfaceView,
                                     @Nullable SurfaceHolder surfaceHolder) {
            mSurfaceView = surfaceView;
            mSurfaceHolder = surfaceHolder;
        }

        public void bindToMediaPlayer(IMediaPlayer mp) {
            if (mp != null) {
                if ((Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) &&
                        (mp instanceof ISurfaceTextureHolder)) {
                    ISurfaceTextureHolder textureHolder = (ISurfaceTextureHolder) mp;
                    textureHolder.setSurfaceTexture(null);
                }
                mp.setDisplay(mSurfaceHolder);
            }
        }

        @NonNull
        @Override
        public IRenderView getRenderView() {
            return mSurfaceView;
        }

        @Nullable
        @Override
        public SurfaceHolder getSurfaceHolder() {
            return mSurfaceHolder;
        }

        @Nullable
        @Override
        public SurfaceTexture getSurfaceTexture() {
            return null;
        }

        @Nullable
        @Override
        public Surface openSurface() {
            if (mSurfaceHolder == null)
                return null;
            return mSurfaceHolder.getSurface();
        }
    }

    //-------------------------
    // SurfaceHolder.Callback
    //-------------------------

    @Override
    public void addRenderCallback(IRenderCallback callback) {
        mSurfaceCallback.addRenderCallback(callback);
    }

    @Override
    public void removeRenderCallback(IRenderCallback callback) {
        mSurfaceCallback.removeRenderCallback(callback);
    }

    private SurfaceCallback mSurfaceCallback;

    private static final class SurfaceCallback implements SurfaceHolder.Callback {
        private SurfaceHolder mSurfaceHolder;
        private boolean mIsFormatChanged;
        private int mFormat;
        private int mWidth;
        private int mHeight;

        private WeakReference<SurfaceRenderView> mWeakSurfaceView;
        private Map<IRenderCallback, Object> mRenderCallbackMap = new ConcurrentHashMap<IRenderCallback, Object>();

        public SurfaceCallback(@NonNull SurfaceRenderView surfaceView) {
            mWeakSurfaceView = new WeakReference<SurfaceRenderView>(surfaceView);
        }

        public void addRenderCallback(@NonNull IRenderCallback callback) {
            mRenderCallbackMap.put(callback, callback);

            ISurfaceHolder surfaceHolder = null;
            if (mSurfaceHolder != null) {
                if (surfaceHolder == null)
                    surfaceHolder = new InternalSurfaceHolder(mWeakSurfaceView.get(), mSurfaceHolder);
                callback.onSurfaceCreated(surfaceHolder, mWidth, mHeight);
            }

            if (mIsFormatChanged) {
                if (surfaceHolder == null)
                    surfaceHolder = new InternalSurfaceHolder(mWeakSurfaceView.get(), mSurfaceHolder);
                callback.onSurfaceChanged(surfaceHolder, mFormat, mWidth, mHeight);
            }
        }

        public void removeRenderCallback(@NonNull IRenderCallback callback) {
            mRenderCallbackMap.remove(callback);
        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            mSurfaceHolder = holder;
            mIsFormatChanged = false;
            mFormat = 0;
            mWidth = 0;
            mHeight = 0;

            ISurfaceHolder surfaceHolder = new InternalSurfaceHolder(mWeakSurfaceView.get(), mSurfaceHolder);
            for (IRenderCallback renderCallback : mRenderCallbackMap.keySet()) {
                renderCallback.onSurfaceCreated(surfaceHolder, 0, 0);
            }
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            mSurfaceHolder = null;
            mIsFormatChanged = false;
            mFormat = 0;
            mWidth = 0;
            mHeight = 0;

            ISurfaceHolder surfaceHolder = new InternalSurfaceHolder(mWeakSurfaceView.get(), mSurfaceHolder);
            for (IRenderCallback renderCallback : mRenderCallbackMap.keySet()) {
                renderCallback.onSurfaceDestroyed(surfaceHolder);
            }
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format,
                                   int width, int height) {
            mSurfaceHolder = holder;
            mIsFormatChanged = true;
            mFormat = format;
            mWidth = width;
            mHeight = height;

            // mMeasureHelper.setVideoSize(width, height);

            ISurfaceHolder surfaceHolder = new InternalSurfaceHolder(mWeakSurfaceView.get(), mSurfaceHolder);
            for (IRenderCallback renderCallback : mRenderCallbackMap.keySet()) {
                renderCallback.onSurfaceChanged(surfaceHolder, format, width, height);
            }
        }
    }

    //--------------------
    // Accessibility
    //--------------------

    @Override
    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
        super.onInitializeAccessibilityEvent(event);
        event.setClassName(SurfaceRenderView.class.getName());
    }

    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
    @Override
    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
        super.onInitializeAccessibilityNodeInfo(info);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            info.setClassName(SurfaceRenderView.class.getName());
        }
    }
}

编译生成的`Smali`文件如下

.class public Lcom/atstudy/player/media/SurfaceRenderView;
.super Landroid/view/SurfaceView;
.source "SurfaceRenderView.java"

# interfaces
.implements Lcom/atstudy/player/media/IRenderView;


# annotations
.annotation system Ldalvik/annotation/MemberClasses;
    value = {
        Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;,
        Lcom/atstudy/player/media/SurfaceRenderView$InternalSurfaceHolder;
    }
.end annotation


# instance fields
.field private mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

.field private mSurfaceCallback:Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;


# direct methods
.method public constructor <init>(Landroid/content/Context;)V
    .registers 2
    .param p1, "context"    # Landroid/content/Context;

    .prologue
    .line 47
    invoke-direct {p0, p1}, Landroid/view/SurfaceView;-><init>(Landroid/content/Context;)V

    .line 48
    invoke-direct {p0, p1}, Lcom/atstudy/player/media/SurfaceRenderView;->initView(Landroid/content/Context;)V

    .line 49
    return-void
.end method

.method public constructor <init>(Landroid/content/Context;Landroid/util/AttributeSet;)V
    .registers 3
    .param p1, "context"    # Landroid/content/Context;
    .param p2, "attrs"    # Landroid/util/AttributeSet;

    .prologue
    .line 52
    invoke-direct {p0, p1, p2}, Landroid/view/SurfaceView;-><init>(Landroid/content/Context;Landroid/util/AttributeSet;)V

    .line 53
    invoke-direct {p0, p1}, Lcom/atstudy/player/media/SurfaceRenderView;->initView(Landroid/content/Context;)V

    .line 54
    return-void
.end method

.method public constructor <init>(Landroid/content/Context;Landroid/util/AttributeSet;I)V
    .registers 4
    .param p1, "context"    # Landroid/content/Context;
    .param p2, "attrs"    # Landroid/util/AttributeSet;
    .param p3, "defStyleAttr"    # I

    .prologue
    .line 57
    invoke-direct {p0, p1, p2, p3}, Landroid/view/SurfaceView;-><init>(Landroid/content/Context;Landroid/util/AttributeSet;I)V

    .line 58
    invoke-direct {p0, p1}, Lcom/atstudy/player/media/SurfaceRenderView;->initView(Landroid/content/Context;)V

    .line 59
    return-void
.end method

.method public constructor <init>(Landroid/content/Context;Landroid/util/AttributeSet;II)V
    .registers 5
    .param p1, "context"    # Landroid/content/Context;
    .param p2, "attrs"    # Landroid/util/AttributeSet;
    .param p3, "defStyleAttr"    # I
    .param p4, "defStyleRes"    # I
    .annotation build Landroid/annotation/TargetApi;
        value = 0x15
    .end annotation

    .prologue
    .line 63
    invoke-direct {p0, p1, p2, p3, p4}, Landroid/view/SurfaceView;-><init>(Landroid/content/Context;Landroid/util/AttributeSet;II)V

    .line 64
    invoke-direct {p0, p1}, Lcom/atstudy/player/media/SurfaceRenderView;->initView(Landroid/content/Context;)V

    .line 65
    return-void
.end method

.method private initView(Landroid/content/Context;)V
    .registers 4
    .param p1, "context"    # Landroid/content/Context;

    .prologue
    .line 68
    new-instance v0, Lcom/atstudy/player/media/MeasureHelper;

    invoke-direct {v0, p0}, Lcom/atstudy/player/media/MeasureHelper;-><init>(Landroid/view/View;)V

    iput-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

    .line 69
    new-instance v0, Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;

    invoke-direct {v0, p0}, Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;-><init>(Lcom/atstudy/player/media/SurfaceRenderView;)V

    iput-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mSurfaceCallback:Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;

    .line 70
    invoke-virtual {p0}, Lcom/atstudy/player/media/SurfaceRenderView;->getHolder()Landroid/view/SurfaceHolder;

    move-result-object v0

    iget-object v1, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mSurfaceCallback:Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;

    invoke-interface {v0, v1}, Landroid/view/SurfaceHolder;->addCallback(Landroid/view/SurfaceHolder$Callback;)V

    .line 72
    invoke-virtual {p0}, Lcom/atstudy/player/media/SurfaceRenderView;->getHolder()Landroid/view/SurfaceHolder;

    move-result-object v0

    const/4 v1, 0x0

    invoke-interface {v0, v1}, Landroid/view/SurfaceHolder;->setType(I)V

    .line 73
    return-void
.end method


# virtual methods
.method public addRenderCallback(Lcom/atstudy/player/media/IRenderView$IRenderCallback;)V
    .registers 3
    .param p1, "callback"    # Lcom/atstudy/player/media/IRenderView$IRenderCallback;

    .prologue
    .line 180
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mSurfaceCallback:Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;

    invoke-virtual {v0, p1}, Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;->addRenderCallback(Lcom/atstudy/player/media/IRenderView$IRenderCallback;)V

    .line 181
    return-void
.end method

.method public getView()Landroid/view/View;
    .registers 1

    .prologue
    .line 77
    return-object p0
.end method

.method public onInitializeAccessibilityEvent(Landroid/view/accessibility/AccessibilityEvent;)V
    .registers 3
    .param p1, "event"    # Landroid/view/accessibility/AccessibilityEvent;

    .prologue
    .line 277
    invoke-super {p0, p1}, Landroid/view/SurfaceView;->onInitializeAccessibilityEvent(Landroid/view/accessibility/AccessibilityEvent;)V

    .line 278
    const-class v0, Lcom/atstudy/player/media/SurfaceRenderView;

    invoke-virtual {v0}, Ljava/lang/Class;->getName()Ljava/lang/String;

    move-result-object v0

    invoke-virtual {p1, v0}, Landroid/view/accessibility/AccessibilityEvent;->setClassName(Ljava/lang/CharSequence;)V

    .line 279
    return-void
.end method

.method public onInitializeAccessibilityNodeInfo(Landroid/view/accessibility/AccessibilityNodeInfo;)V
    .registers 4
    .param p1, "info"    # Landroid/view/accessibility/AccessibilityNodeInfo;
    .annotation build Landroid/annotation/TargetApi;
        value = 0xe
    .end annotation

    .prologue
    .line 284
    invoke-super {p0, p1}, Landroid/view/SurfaceView;->onInitializeAccessibilityNodeInfo(Landroid/view/accessibility/AccessibilityNodeInfo;)V

    .line 285
    sget v0, Landroid/os/Build$VERSION;->SDK_INT:I

    const/16 v1, 0xe

    if-lt v0, v1, :cond_12

    .line 286
    const-class v0, Lcom/atstudy/player/media/SurfaceRenderView;

    invoke-virtual {v0}, Ljava/lang/Class;->getName()Ljava/lang/String;

    move-result-object v0

    invoke-virtual {p1, v0}, Landroid/view/accessibility/AccessibilityNodeInfo;->setClassName(Ljava/lang/CharSequence;)V

    .line 288
    :cond_12
    return-void
.end method

.method protected onMeasure(II)V
    .registers 5
    .param p1, "widthMeasureSpec"    # I
    .param p2, "heightMeasureSpec"    # I

    .prologue
    .line 118
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

    invoke-virtual {v0, p1, p2}, Lcom/atstudy/player/media/MeasureHelper;->doMeasure(II)V

    .line 119
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

    invoke-virtual {v0}, Lcom/atstudy/player/media/MeasureHelper;->getMeasuredWidth()I

    move-result v0

    iget-object v1, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

    invoke-virtual {v1}, Lcom/atstudy/player/media/MeasureHelper;->getMeasuredHeight()I

    move-result v1

    invoke-virtual {p0, v0, v1}, Lcom/atstudy/player/media/SurfaceRenderView;->setMeasuredDimension(II)V

    .line 120
    return-void
.end method

.method public removeRenderCallback(Lcom/atstudy/player/media/IRenderView$IRenderCallback;)V
    .registers 3
    .param p1, "callback"    # Lcom/atstudy/player/media/IRenderView$IRenderCallback;

    .prologue
    .line 185
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mSurfaceCallback:Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;

    invoke-virtual {v0, p1}, Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;->removeRenderCallback(Lcom/atstudy/player/media/IRenderView$IRenderCallback;)V

    .line 186
    return-void
.end method

.method public setAspectRatio(I)V
    .registers 3
    .param p1, "aspectRatio"    # I

    .prologue
    .line 112
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

    invoke-virtual {v0, p1}, Lcom/atstudy/player/media/MeasureHelper;->setAspectRatio(I)V

    .line 113
    invoke-virtual {p0}, Lcom/atstudy/player/media/SurfaceRenderView;->requestLayout()V

    .line 114
    return-void
.end method

.method public setVideoRotation(I)V
    .registers 5
    .param p1, "degree"    # I

    .prologue
    .line 107
    const-string v0, ""

    new-instance v1, Ljava/lang/StringBuilder;

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

    const-string v2, "SurfaceView doesn\'t support rotation ("

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

    move-result-object v1

    invoke-virtual {v1, p1}, Ljava/lang/StringBuilder;->append(I)Ljava/lang/StringBuilder;

    move-result-object v1

    const-string v2, ")!\n"

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

    move-result-object v1

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

    move-result-object v1

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

    .line 108
    return-void
.end method

.method public setVideoSampleAspectRatio(II)V
    .registers 4
    .param p1, "videoSarNum"    # I
    .param p2, "videoSarDen"    # I

    .prologue
    .line 99
    if-lez p1, :cond_c

    if-lez p2, :cond_c

    .line 100
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

    invoke-virtual {v0, p1, p2}, Lcom/atstudy/player/media/MeasureHelper;->setVideoSampleAspectRatio(II)V

    .line 101
    invoke-virtual {p0}, Lcom/atstudy/player/media/SurfaceRenderView;->requestLayout()V

    .line 103
    :cond_c
    return-void
.end method

.method public setVideoSize(II)V
    .registers 4
    .param p1, "videoWidth"    # I
    .param p2, "videoHeight"    # I

    .prologue
    .line 90
    if-lez p1, :cond_13

    if-lez p2, :cond_13

    .line 91
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

    invoke-virtual {v0, p1, p2}, Lcom/atstudy/player/media/MeasureHelper;->setVideoSize(II)V

    .line 92
    invoke-virtual {p0}, Lcom/atstudy/player/media/SurfaceRenderView;->getHolder()Landroid/view/SurfaceHolder;

    move-result-object v0

    invoke-interface {v0, p1, p2}, Landroid/view/SurfaceHolder;->setFixedSize(II)V

    .line 93
    invoke-virtual {p0}, Lcom/atstudy/player/media/SurfaceRenderView;->requestLayout()V

    .line 95
    :cond_13
    return-void
.end method

.method public shouldWaitForResize()Z
    .registers 2

    .prologue
    .line 82
    const/4 v0, 0x1

    return v0
.end method

具体解析如下

.class public Lcom/atstudy/player/media/SurfaceRenderView;
.super Landroid/view/SurfaceView;
.source "SurfaceRenderView.java"

前三行告诉我们这个类相关的信息
访问修饰符为public
全限定名为com/atstudy/player/media/SurfaceRenderView
继承自android/view/SurfaceView
源文件名SurfaceRenderView.java，
Note:经过混淆的DEX文件，反编译出来的Smali代码可能没有源文件信息，source可能为空

# annotations
.annotation system Ldalvik/annotation/MemberClasses;
    value = {
        Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;,
        Lcom/atstudy/player/media/SurfaceRenderView$InternalSurfaceHolder;
    }
.end annotation

注解，成员内部类共有两个

.field private mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;

.field private mSurfaceCallback:Lcom/atstudy/player/media/SurfaceRenderView$SurfaceCallback;

私有属性mMeasureHelper, mSurfaceCallback说明

.method public constructor <init>(Landroid/content/Context;)V
    .registers 2
    .param p1, "context"    # Landroid/content/Context;

    .prologue
    .line 47
    invoke-direct {p0, p1}, Landroid/view/SurfaceView;-><init>(Landroid/content/Context;)V


    .line 48
    invoke-direct {p0, p1}, Lcom/atstudy/player/media/SurfaceRenderView;->initView(Landroid/content/Context;)V

    .line 49
    return-void
.end method

构造方法其中

.registers 指定方法中寄存器总数
.prologue 表示代码开始
invoke-direct 表示调用函数`

Note:``Smali中的函数调用 Smali中的函数和成员变量一样也分为两种类型，但是不同成员变量中的static和instance之分，而是direct和virtual之分。那么direct method和virtual method有什么区别呢？直白地讲，direct method就是private函数，其余的public和protected函数都属于virtual method。所以在调用函数时，有invoke-direct，invoke-virtual，另外还有invoke-static、invoke-super以及invoke-interface等几种不同的指令。当然其实还有invoke-XXX/range指令的，这是参数多于4个的时候调用的指令，比较少见，了解下即可

返回类型如下：

V void，只能用于返回值类型

Z boolean

B byte

S short

C charI intJ long（64 位）

F floatD double（64 位）

L Java 类类型

[ 数组类型

分析一个其中方法逻辑

//onMeasure方法访问域为protected，两个Int类型参数，一个为widthMeasureSpec，
//另一个为heightMeasureSpec，返回值为Void类型，需要5个寄存器，其中p1存储了widthMeasureSpec， p2存储了heightMeasureSpec
.method protected onMeasure(II)V
    .registers 5
    .param p1, "widthMeasureSpec"    # I
    .param p2, "heightMeasureSpec"    # I

    .prologue //代码开始
    .line 118
    // 获取mMeasureHelper字段并保存到V0寄存器中，p0相当于java中到this关键字
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;
    //调用mMeasureHelper的doMeasure方法，其中p1,p2为参数，参数类型为int,返回值为Void
    invoke-virtual {v0, p1, p2}, Lcom/atstudy/player/media/MeasureHelper;->doMeasure(II)V

    .line 119
    //获取mMeasureHelper字段并保存到V0寄存器中，p0相当于java中到this关键字
    iget-object v0, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;
    //调用mMeasureHelper的getMeasuredWidth()方法，返回值为Int类型
    invoke-virtual {v0}, Lcom/atstudy/player/media/MeasureHelper;->getMeasuredWidth()I
    //将得到的结果放到V0寄存器中
    move-result v0
    //获取mMeasureHelper字段并保存到V1寄存器中，p0相当于java中到this关键字
    iget-object v1, p0, Lcom/atstudy/player/media/SurfaceRenderView;->mMeasureHelper:Lcom/atstudy/player/media/MeasureHelper;
   //调用mMeasureHelper的getMeasuredHeight方法，返回值为Int类型
    invoke-virtual {v1}, Lcom/atstudy/player/media/MeasureHelper;->getMeasuredHeight()I
    //将得到的结果放到V1寄存器中
    move-result v1
    //调用当前对象的setMeasuredDimension方法，参数为v0和v1寄存器的值，都为Int类型，返回值为Void
    invoke-virtual {p0, v0, v1}, Lcom/atstudy/player/media/SurfaceRenderView;->setMeasuredDimension(II)V

    .line 120
    //返回Void类型
    return-void
.end method//方法结束

Smali语法解析

Smali语言是什么？

代码示例

编译生成的`Smali`文件如下

具体解析如下

分析一个其中方法逻辑

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Smali语法解析

Smali语言是什么？

代码示例

编译生成的Smali文件如下

具体解析如下

分析一个其中方法逻辑

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栏目导航

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编译生成的`Smali`文件如下