我们是否需要在棉花糖中明确请求除AndroidManifest.xml之外的权限？

在低于棉花糖的Android版本中，我可以运行将文件写入外部存储器的应用程序。在这些系统中，权限是在安装应用程序时授予的。但当我试图在棉花糖中运行我的应用程序时，它在安装时说“该应用程序不需要任何权限”。当我执行write函数时，应用程序意外退出

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通常，设备在第一次打开应用程序时会要求授予每个应用程序的权限。但在我的应用程序中，这种情况也不会发生。

您必须自己为Android 6.0+（棉花糖）提供运行时权限处理。有关更多信息，请参阅。

您必须自己为Android 6.0+（棉花糖）提供运行时权限处理。有关更多信息，请参阅。

在Android M及更高版本中，您必须请求分类为“危险”的权限。您可以找到需要请求的权限的完整列表

但是，您可以通过将compileSDK和targetSDK设置为<23来避免请求。请注意，这会阻止您使用任何API 23+功能

您请求的权限如下所示：

ActivityCompat.requestPermissions(MainActivity.this,
                new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},//Your permissions here
                1);//Random request code

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 1: {

          // If request is cancelled, the result arrays are empty.
          if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay! Do the
                // contacts-related task you need to do.          
            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                Toast.makeText(MainActivity.this, "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }
}

通过执行以下操作检查用户是否正在运行API 23+：

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
    //Request: Use a method or add the permission asking directly into here.
}

如果你需要检查结果，你可以这样做：

ActivityCompat.requestPermissions(MainActivity.this,
                new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},//Your permissions here
                1);//Random request code

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 1: {

          // If request is cancelled, the result arrays are empty.
          if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay! Do the
                // contacts-related task you need to do.          
            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                Toast.makeText(MainActivity.this, "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }
}

---

在安卓M及以上版本中，您必须请求分类为“危险”的权限。您可以找到需要请求的权限的完整列表

但是，您可以通过将compileSDK和targetSDK设置为<23来避免请求。请注意，这会阻止您使用任何API 23+功能

您请求的权限如下所示：

ActivityCompat.requestPermissions(MainActivity.this,
                new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},//Your permissions here
                1);//Random request code

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 1: {

          // If request is cancelled, the result arrays are empty.
          if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay! Do the
                // contacts-related task you need to do.          
            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                Toast.makeText(MainActivity.this, "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }
}

通过执行以下操作检查用户是否正在运行API 23+：

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
    //Request: Use a method or add the permission asking directly into here.
}

如果你需要检查结果，你可以这样做：

ActivityCompat.requestPermissions(MainActivity.this,
                new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},//Your permissions here
                1);//Random request code

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 1: {

          // If request is cancelled, the result arrays are empty.
          if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay! Do the
                // contacts-related task you need to do.          
            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                Toast.makeText(MainActivity.this, "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }
}