android API 22 and below not supported

[Jai-GAY]

Don't work for Android API 22,21,20,19. private void startSDKRegistration() { never get called.

// When the compile and target version is higher than 22, please request the following permission at runtime to ensure the SDK works well.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkAndRequestPermissions();
}

[Jai-GAY]

after modifying the code, still don't work. app reports Register sdk fails, please check the bundle id and network connection!"
register_fails.txt

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        checkAndRequestPermissions();
    }
    else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)
    {
        startSDKRegistration();
    }

[Jai-GAY]

apologies, APP ID key must be unique to Bundle Identifier. can't reuse. this problem solved.

10-02 15:21:27.945 2004-2004/com.dji.importSDKDemo D/com.dji.importSDKDemo.MainActivity: startSDKRegistration
10-02 15:21:27.948 2004-2004/com.dji.importSDKDemo D/com.dji.importSDKDemo.MainActivity: onCreate build : 22
10-02 15:21:33.891 2004-2062/com.dji.importSDKDemo V/com.dji.importSDKDemo.MainActivity: API Key successfully registered