嗨，实际上我正在尝试创建一个与Sip和Asterisk通信一起工作的应用程序，但是当我试图在我的设备上运行此应用程序时，它的工作正常，但是如果它尝试使用Android模拟器那么请向我显示错误请帮助我来解决这个错误
public class MainActivity extends Activity {
public SipProfile me = null;
public SipProfile.Builder builder = null;
public SipManager mSipManager = null;
public String sipaddress = null;
public String username = "17772146242101";
public String domain = "callcentric.com";
public String password = "Gjmurugan2!";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b1 = (Button) findViewById(R.id.button1);
if (mSipManager == null) {
mSipManager = SipManager.newInstance(getApplicationContext());
}
}
public void Register(View v)
{
try {
builder = new SipProfile.Builder(username, domain);
builder.setPassword(password);
me = builder.build();
} catch (ParseException e) {
e.printStackTrace();
}
Intent intent=new Intent();
intent.setAction("android.sipexample.INCOMING_CALL");
PendingIntent pi=PendingIntent.getBroadcast(getApplicationContext(), 0, intent, Intent.FILL_IN_DATA);
try {
mSipManager.open(me, pi, null);
} catch (SipException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
mSipManager.setRegistrationListener(me.getUriString(), new SipRegistrationListener() {
public void onRegistering(String arg0) {
Log.d("Success", "Registering with SIP Server...");
}
public void onRegistrationDone(String arg0, long arg1) {
Log.d("Connection Ready", "Ready For Communication");
}
public void onRegistrationFailed(String arg0, int arg2, String arg1) {
Log.d("Error Code", Integer.toString(arg2));
Log.d("Error Message", arg1);
}
});
} catch (SipException e) {
// TODO: handle exception
e.printStackTrace();
}
}
// closeLocalProfile();
private void closeLocalProfile() {
// TODO Auto-generated method stub
if (mSipManager == null) {
return;
}
try {
if (me != null) {
mSipManager.close(me.getUriString());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.sipreg.MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="147dp"
android:onClick="Register"
android:text="Register-Sip" />
</RelativeLayout>
这是我在Logcat中的错误
01-05 23:58:43.997: D/AndroidRuntime(1069): Shutting down VM
01-05 23:58:43.997: W/dalvikvm(1069): threadid=1: thread exiting with uncaught exception (group=0xb4a27ba8)
01-05 23:58:44.017: E/AndroidRuntime(1069): FATAL EXCEPTION: main
01-05 23:58:44.017: E/AndroidRuntime(1069): Process: com.example.sipreg, PID: 1069
01-05 23:58:44.017: E/AndroidRuntime(1069): java.lang.IllegalStateException: Could not execute method of the activity
01-05 23:58:44.017: E/AndroidRuntime(1069): at android.view.View$1.onClick(View.java:3823)
01-05 23:58:44.017: E/AndroidRuntime(1069): at android.view.View.performClick(View.java:4438)
01-05 23:58:44.017: E/AndroidRuntime(1069): at android.view.View$PerformClick.run(View.java:18422)
01-05 23:58:44.017: E/AndroidRuntime(1069): at android.os.Handler.handleCallback(Handler.java:733)
01-05 23:58:44.017: E/AndroidRuntime(1069): at android.os.Handler.dispatchMessage(Handler.java:95)
01-05 23:58:44.017: E/AndroidRuntime(1069): at android.os.Looper.loop(Looper.java:136)
01-05 23:58:44.017: E/AndroidRuntime(1069): at android.app.ActivityThread.main(ActivityThread.java:5001)
01-05 23:58:44.017: E/AndroidRuntime(1069): at java.lang.reflect.Method.invokeNative(Native Method)
01-05 23:58:44.017: E/AndroidRuntime(1069): at java.lang.reflect.Method.invoke(Method.java:515)
01-05 23:58:44.017: E/AndroidRuntime(1069): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
01-05 23:58:44.017: E/AndroidRuntime(1069): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
01-05 23:58:44.017: E/AndroidRuntime(1069): at dalvik.system.NativeStart.main(Native Method)
01-05 23:58:44.017: E/AndroidRuntime(1069): Caused by: java.lang.reflect.InvocationTargetException
01-05 23:58:44.017: E/AndroidRuntime(1069): at java.lang.reflect.Method.invokeNative(Native Method)
01-05 23:58:44.017: E/AndroidRuntime(1069): at java.lang.reflect.Method.invoke(Method.java:515)
01-05 23:58:44.017: E/AndroidRuntime(1069): at android.view.View$1.onClick(View.java:3818)
01-05 23:58:44.017: E/AndroidRuntime(1069): ... 11 more
01-05 23:58:44.017: E/AndroidRuntime(1069): Caused by: java.lang.NullPointerException
01-05 23:58:44.017: E/AndroidRuntime(1069): at com.example.sipreg.MainActivity.Register(MainActivity.java:52)
01-05 23:58:44.017: E/AndroidRuntime(1069): ... 14 more
01-05 23:58:45.777: I/Process(1069): Sending signal. PID: 1069 SIG: 9
答案 0 :(得分：0)
有些仿真器不支持SIP，即使支持API也是如此。
因此，SipManager.newInstance可能会返回null：首先检查它！
旁注：如果我们清楚地知道您的MainActivity.java文件中的第52行，那将会有所帮助！