getIntExtra
时间: 2023-12-04 16:10:13 浏览: 127
getIntExtra是一个Android中的方法,用于从Intent中获取一个整数类型的额外数据。该方法有两个参数,第一个参数是需要获取的数据的键名,第二个参数是如果没有找到对应键名的数据时,返回的默认值。例如,下面的代码从Intent中获取了一个名为"age"的整数类型数据,如果找不到该数据,则返回默认值0:
```
int age = getIntent().getIntExtra("age", 0);
```
相关问题
getIntExtra()
getIntExtra() is a method in the Android SDK's Intent class that retrieves an integer value from an Intent object. It is commonly used to pass data between Activities or Services in an Android application. getIntExtra() takes two parameters: the name of the extra data as a string, and a default value to return if the extra data is not found.
For example, if an Activity needs to pass an integer value to another Activity, it can create an Intent object and use putExtra() to add the value to the Intent. The receiving Activity can then use getIntExtra() to retrieve the value.
Here's an example of how to use getIntExtra():
```
// Sender Activity
Intent intent = new Intent(SenderActivity.this, ReceiverActivity.class);
int value = 42;
intent.putExtra("myIntExtra", value);
startActivity(intent);
// Receiver Activity
int defaultValue = 0;
int receivedValue = getIntent().getIntExtra("myIntExtra", defaultValue);
```
In this example, the Sender Activity creates an Intent object and adds an integer value of 42 to it using putExtra(). It then starts the Receiver Activity with this Intent.
In the Receiver Activity, the getIntExtra() method is used to retrieve the integer value from the Intent. The first parameter is the name of the extra data ("myIntExtra"), and the second parameter is the default value to return if the extra data is not found (in this case, 0). The retrieved value is assigned to the variable "receivedValue".
data.getIntExtra
data.getIntExtra是一个Android中的方法,用于从Intent对象中获取整型数据。它接受两个参数:键(key)和默认值(defaultValue)。它会尝试从Intent中获取与给定键对应的整型值,如果找不到,则返回默认值。这个方法通常用于在Activity之间传递数据。
例如,以下是一个使用data.getIntExtra方法获取整型数据的示例代码:
```java
Intent intent = getIntent();
int value = intent.getIntExtra("key", defaultValue);
```
在上面的代码中,我们获取名为"key"的整型数据,如果找不到,则返回defaultValue的值。你可以根据实际需要替换"key"和defaultValue。