android虚拟机 原理
    ## English Answer:
    ### Android Virtual Machine (AVM)。
    The Android Virtual Machine (AVM) is a runtime environment that executes Android applications. It is a specialized version of the Java Virtual Machine (JVM) that has been optimized for Android devices. The AVM is responsible for managing the execution of Android applications, including:
    Loading and executing class files.
    Managing memory and resources.
    Providing security and isolation.
安卓虚拟机软件下载    The AVM is designed to be efficient and secure. It uses a number of techniques to improve performance, including:
    Just-in-time (JIT) compilation.
    Garbage collection.
    Ahead-of-time (AOT) compilation.
    The AVM also provides a number of security features, including:
    Sandboxing.
    Permissions.
    Code signing.
    ### Dalvik Virtual Machine (DVM)。
    The Dalvik Virtual Machine (DVM) was the original virtual machine used by Android devices. It was developed by Google and is based on the Java Virtual Machine (JVM). The DVM was designed to be lightweight and efficient, and it was able to run on a wide range of devices.
    The DVM was eventually replaced by the Android Virtual Machine (AVM) in Android 5.0 Lollipop. The AVM is a more modern and efficient virtual machine that provides a number of improvements over the DVM, including:
    Better performance.
    Improved security.
    Support for new features.
    ### Execution of Android Applications.
    Android applications are written in Java and compiled into Dalvik bytecode. When an Android application is launched, the AVM loads the Dalvik bytecode into memory and executes it. The AVM is responsible for managing the execution of the application, including:

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