千寻位置 v2.8.9版本的 MD5 值为：c028423c956e81d2a162977350c0ec2e

以下内容为反编译后的 SipTest.java 源代码，内容仅作参考

package com.yanzhenjie.permission.checker;

import android.content.Context;
import android.net.sip.SipManager;
import android.net.sip.SipProfile;

class SipTest implements PermissionTest {
    private Context mContext;

    public SipTest(Context context) {
        this.mContext = context;
    }

    @Override
    public boolean test() throws Throwable {
        SipManager newInstance;
        if (!SipManager.isApiSupported(this.mContext) || (newInstance = SipManager.newInstance(this.mContext)) == null) {
            return true;
        }
        SipProfile.Builder builder = new SipProfile.Builder("Permission", "127.0.0.1");
        builder.setPassword("password");
        SipProfile build = builder.build();
        newInstance.open(build);
        newInstance.close(build.getUriString());
        return true;
    }
}