Android13 Context sendOrderedBroadcast流程分析

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已于 2024-05-06 08:33:19 修改

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于 2024-05-03 18:20:03 首次发布

本文链接：https://blog.youkuaiyun.com/liuning1985622/article/details/138421407

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本文详细解析了Android中Context的sendOrderedBroadcast方法的工作原理，以及它如何通过ActivityManager的broadcastIntentWithFeature方法发送有序广播，重点讨论了13版本中的实现流程。

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Context的sendOrderedBroadcast用于发送有序广播，代码如下：

//frameworks/base/core/java/android/content/Context.java
public abstract class Context {
    public abstract void sendOrderedBroadcast(@RequiresPermission Intent intent,
            @Nullable String receiverPermission);
}

Context是抽象类，由其子类ContextImpl实现：

//frameworks/base/core/java/android/content/ContextImpl.java
class ContextImpl extends Context {
    public void sendOrderedBroadcast(Intent intent, String receiverPermission) {
        warnIfCallingFromSystemProcess();
        String resolvedType = intent.resolveTypeIfNeeded(getContentResolver());
        String[] receiverPermissions = receiverPermission == null ? null
                : new String[] {receiverPermission};
        try {
            intent.prepareToLeaveProcess(this);
            ActivityManager.getService().broadcastIntentWithFeature(

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