Android - 打印 Intent 里的所有 内容(特别是e

1. 核心代码

一句核心代码： intent.toUri(0)

2. 封装为通用函数

特别是方便于在 Framework 中的加日志调试

    private void printAllIntentExtras(Intent intent) {
        Log.d("JustDebug", "printAllIntentExtras intent=" + intent);
        if (intent == null) {
            Log.d("JustDebug", "printAllIntentExtras intent is null");
            return;
        }

        Log.d("JustDebug", "printAllIntentExtras intent uri=" + intent.toUri(0));
    }

3.源码分析：

看一下 toUri 的源码

    public String toUri(@UriFlags int flags) {
        StringBuilder uri = new StringBuilder(128); 
        if ((flags&URI_ANDROID_APP_SCHEME) != 0) {
           ...
            toUriFragment(uri, null, scheme == null ? Intent.ACTION_MAIN : Intent.ACTION_VIEW,
                    mPackage, flags);          
           return uri.toString();
        }
        
        if (mData != null) {
            String data = mData.toString();
            if ((flags&URI_INTENT_SCHEME) != 0) {
               ...
        } else if ((flags&URI_INTENT_SCHEME) != 0) {
            uri.append("intent:");
        }

        toUriFragment(uri, scheme, Intent.ACTION_VIEW, null, flags);

        return uri.toString();
    }           

这里会根据 flags 即 UriFlags， 进行预先的添加
UriFlags的类型有(一般传入0即可)：

    @IntDef(flag = true, prefix = { "URI_" }, value = {
            URI_ALLOW_UNSAFE,
            URI_ANDROID_APP_SCHEME,
            URI_INTENT_SCHEME,
    })
    @Retention(RetentionPolicy.SOURCE)
    public @interface UriFlags {}

上面的toUri 里的分支，都会调用到 toUriFragment

    private void toUriFragment(StringBuilder uri, String scheme, String defAction,
            String defPackage, int flags) {
        StringBuilder frag = new StringBuilder(128);

        toUriInner(frag, scheme, defAction, defPackage, flags);
        ...
        if (frag.length() > 0) {
            uri.append("#Intent;");
            uri.append(frag);
            uri.append("end");
        }
    }

再调用至 toUriInner, 这里将会详细的打印出来

    private void toUriInner(StringBuilder uri, String scheme, String defAction,
            String defPackage, int flags) {
        if (scheme != null) {
            uri.append("scheme=").append(Uri.encode(scheme)).append(';');
        }
        if (mAction != null && !mAction.equals(defAction)) {
            uri.append("action=").append(Uri.encode(mAction)).append(';');
        }
        if (mCategories != null) {
            for (int i=0; i<mCategories.size(); i++) {
                uri.append("category=").append(Uri.encode(mCategories.valueAt(i))).append(';');
            }
        }
        if (mType != null) {
            uri.append("type=").append(Uri.encode(mType, "/")).append(';');
        }
        if (mIdentifier != null) {
            uri.append("identifier=").append(Uri.encode(mIdentifier, "/")).append(';');
        }
        if (mFlags != 0) {
            uri.append("launchFlags=0x").append(Integer.toHexString(mFlags)).append(';');
        }
        if (mPackage != null && !mPackage.equals(defPackage)) {
            uri.append("package=").append(Uri.encode(mPackage)).append(';');
        }
        if (mComponent != null) {
            uri.append("component=").append(Uri.encode(
                    mComponent.flattenToShortString(), "/")).append(';');
        }
        if (mSourceBounds != null) {
            uri.append("sourceBounds=")
                    .append(Uri.encode(mSourceBounds.flattenToString()))
                    .append(';');
        }
        if (mExtras != null) {
            for (String key : mExtras.keySet()) {
                final Object value = mExtras.get(key);
                char entryType =
                        value instanceof String    ? 'S' :
                        value instanceof Boolean   ? 'B' :
                        value instanceof Byte      ? 'b' :
                        value instanceof Character ? 'c' :
                        value instanceof Double    ? 'd' :
                        value instanceof Float     ? 'f' :
                        value instanceof Integer   ? 'i' :
                        value instanceof Long      ? 'l' :
                        value instanceof Short     ? 's' :
                        '\0';

                if (entryType != '\0') {
                    uri.append(entryType);
                    uri.append('.');
                    uri.append(Uri.encode(key));
                    uri.append('=');
                    uri.append(Uri.encode(value.toString()));
                    uri.append(';');
                }
            }
        }
    }

4 参考：

https://stackoverflow.com/questions/5968896/listing-all-extras-of-an-intent

You can do it in one line of code:
Log.d("intent URI", intent.toUri(0));
It outputs something like:
"#Intent;action=android.intent.action.MAIN;category=android.intent.category.LAUNCHER;launchFlags=0x10a00000
;component=com.mydomain.myapp/.StartActivity;sourceBounds=12%20870%20276%201167; l.profile=0; end"
At the end of this string (the part that I bolded) you can find the list of extras (only one extra in this example).
This is according to the toUri documentation: "The URI contains the Intent's data as the base URI,
with an additional fragment describing the action, categories, type, flags, package, component, and extras."

过时函数：

    @Deprecated
    public String toURI() {
        return toUri(0);
    }