Bundle的get(String key)方法返回一个对象。最好的方法是旋转键集，在每个键上调用get(String)，并在对象上使用toString()来输出它们。这对于基本类型最有效，但是对于没有实现toString()的对象，可能会遇到问题。

以下是我用来获取非法(第三方)意图信息的方法:

Bundle bundle = intent.getExtras();
if (bundle != null) {
    for (String key : bundle.keySet()) {
        Log.e(TAG, key + " : " + (bundle.get(key) != null ? bundle.get(key) : "NULL"));
    }
}

确保在循环之前检查bundle是否为空。

这就是我如何定义实用工具方法来转储Intent的所有额外内容。

import java.util.Iterator;
import java.util.Set;
import android.os.Bundle;


public static void dumpIntent(Intent i){

    Bundle bundle = i.getExtras();
    if (bundle != null) {
        Set<String> keys = bundle.keySet();
        Iterator<String> it = keys.iterator();
        Log.e(LOG_TAG,"Dumping Intent start");
        while (it.hasNext()) {
            String key = it.next();
            Log.e(LOG_TAG,"[" + key + "=" + bundle.get(key)+"]");
        }
        Log.e(LOG_TAG,"Dumping Intent end");
    }
}

Sorry if this is too verbose or too late, but this was the only way I could find to get the job done. The most complicating factor was the fact that java does not have pass by reference functions, so the get---Extra methods need a default to return and cannot modify a boolean value to tell whether or not the default value is being returned by chance, or because the results were not favorable. For this purpose, it would have been nicer to have the method raise an exception than to have it return a default.

我在这里找到了我的信息:Android意图文档。

    //substitute your own intent here
    Intent intent = new Intent();
    intent.putExtra("first", "hello");
    intent.putExtra("second", 1);
    intent.putExtra("third", true);
    intent.putExtra("fourth", 1.01);
    // convert the set to a string array

设置文档

    String[] anArray = {};
    Set<String> extras1 = (Set<String>) intent.getExtras().keySet();
    String[] extras = (String[]) extras1.toArray(anArray);
    // an arraylist to hold all of the strings
    // rather than putting strings in here, you could display them
    ArrayList<String> endResult = new ArrayList<String>();
    for (int i=0; i<extras.length; i++) {
        //try using as a String
        String aString = intent.getStringExtra(extras[i]);
        // is a string, because the default return value for a non-string is null
        if (aString != null) {
            endResult.add(extras[i] + " : " + aString);
        }
        // not a string
        else {
            // try the next data type, int
            int anInt = intent.getIntExtra(extras[i], 0);
            // is the default value signifying that either it is not an int or that it happens to be 0 
            if (anInt == 0) {
                // is an int value that happens to be 0, the same as the default value
                if (intent.getIntExtra(extras[i], 1) != 1) {
                    endResult.add(extras[i] + " : " + Integer.toString(anInt));
                }
                // not an int value
                // try double (also works for float)
                else {
                    double aDouble = intent.getDoubleExtra(extras[i], 0.0);
                    // is the same as the default value, but does not necessarily mean that it is not double
                    if (aDouble == 0.0) {
                        // just happens that it was 0.0 and is a double
                        if (intent.getDoubleExtra(extras[i], 1.0) != 1.0) {
                            endResult.add(extras[i] + " : " + Double.toString(aDouble));
                        }
                        // keep looking...
                        else {
                            // lastly check for boolean
                            boolean aBool = intent.getBooleanExtra(extras[i], false);
                            // same as default, but not necessarily not a bool (still could be a bool)
                            if (aBool == false) {
                                // it is a bool!
                                if (intent.getBooleanExtra(extras[i], true) != true) {
                                    endResult.add(extras[i] + " : " + Boolean.toString(aBool));
                                }
                                else {
                                    //well, the road ends here unless you want to add some more data types
                                }
                            }
                            // it is a bool
                            else {
                                endResult.add(extras[i] + " : " + Boolean.toString(aBool));
                            }
                        }
                    }
                    // is a double
                    else {
                        endResult.add(extras[i] + " : " + Double.toString(aDouble));
                    }
                }
            }
            // is an int value
            else {
                endResult.add(extras[i] + " : " + Integer.toString(anInt));
            }
        }
    }
    // to display at the end
    for (int i=0; i<endResult.size(); i++) {
        Toast.makeText(this, endResult.get(i), Toast.LENGTH_SHORT).show();
    }

我注意到在Android源代码中，几乎每个操作都迫使Bundle解包它的数据。因此，如果(像我一样)你需要经常这样做以调试目的，下面是非常快速的输入:

Bundle extras = getIntent().getExtras();
extras.isEmpty(); // unparcel
System.out.println(extras);

Bundle的get(String key)方法返回一个对象。最好的方法是旋转键集，在每个键上调用get(String)，并在对象上使用toString()来输出它们。这对于基本类型最有效，但是对于没有实现toString()的对象，可能会遇到问题。