Android Cannot resolve method 'checkSelfPermission' in 'ContextCompat'

This error occurs when you try to use the `checkSelfPermission` method from the `ContextCompat` class in an Android project and Android Studio is unable to resolve the method.

To resolve this error, you need to make sure that you have the latest version of the `support-v4` library in your project. You can do this by adding the following line to your app's build.gradle file:

implementation 'com.android.support:support-v4:28.0.0'

Once you have added this line, sync your project and try using the `checkSelfPermission` method again. It should now resolve correctly.

相关问题

Cannot resolve method 'checkSelfPermission' in 'ContextCompat'

This error message usually occurs when you are trying to use the `checkSelfPermission()` method from the `ContextCompat` class, but the method cannot be resolved. The reason for this is that the `checkSelfPermission()` method was introduced in API level 23 (Android Marshmallow) and if your app is targeting an API level lower than 23, then this method won't be available.

To fix this error, you can either:

1. Update your app's targetSdkVersion to 23 or higher in your app's build.gradle file. This will make the `checkSelfPermission()` method available.

2. Use the `ActivityCompat` class instead of `ContextCompat`, which has a similar `checkSelfPermission()` method that is available in all API levels.

For example, instead of:

ContextCompat.checkSelfPermission(context, permission)

You can use:

ActivityCompat.checkSelfPermission(activity, permission)

Make sure to import the `ActivityCompat` class at the top of your file:

import androidx.core.app.ActivityCompat;

android cannot resolve method

"android无法解析方法"的意思是在Android应用程序中，某个方法无法被解析或识别。这可能是由于方法名称拼写错误、方法参数不正确或方法不存在等原因造成的。要解决此问题，您可以检查方法名称和参数是否正确，并确保您的代码中包含该方法的定义。如果问题仍然存在，请尝试重新构建您的应用程序或清除缓存并重新编译。