应用程序崩溃，而使用不同类的方法 [英] application crashes while using a method of different class

问题描述

我正在开发的传入和传出呼叫的SIP应用程序，我想显示的 AlertDialog 在来电。为此，我已经把两个按钮对话框接受和拒绝。在pressing这个按钮的应用程序中的任何一个是崩溃。

I am developing a SIP application for incoming and outgoing calls and i want to show AlertDialog on incoming call. For that i had put two buttons with dialog Accept and Reject. on pressing either one of this buttons application is crashes.

这是我的类的code 和清单文件。

$ C $下incomingCallReciever

code for incomingCallReciever

public class IncomingCallReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
    Intent nextpage = new Intent(context, IncomingCallPage.class);
    nextpage.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(nextpage);
    mContext = context;

}

public void acceptCall() {
    incomingCall.sendDtmf(9);
    try {
        incomingCall.sendDtmf(9);
        incomingCall.answerCall(200);
        wtActivity.gototimer("i");
    } catch (SipException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    wtActivity.gototimer("i");
}

public void rejectCaLL() {
    try {
        incomingCall.endCall();
    } catch (SipException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

}
//这个code将打开一个新的屏幕，这是（incomingCallpage.class） $ C $下incomingCallpage

}
//this code will open a new screen which is (incomingCallpage.class) code for incomingCallpage

public class IncomingCallPage extends Activity {
    IncomingCallReceiver incomingCallReceiver;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Toast.makeText(IncomingCallPage.this, "Incoming call Page", 5000)
            .show();
    new AlertDialog.Builder(this)
            .setTitle("Incoming Call")
            .setMessage("From:242424")
            .setIcon(R.drawable.phone)
            .setPositiveButton("Accept",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {

                            **incomingCallReceiver.acceptCall();**
                        }
                    })
            .setNegativeButton("Reject",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            **incomingCallReceiver.rejectCaLL();**
                        }
                    }).show();
}

}

//我已经登记在manifest.xml文件中reciever。

//i have registered the reciever in manifest.xml file.

<uses-sdk android:minSdkVersion="9" />

<uses-feature
    android:name="android.hardware.sip.voip"
    android:required="true" />

<uses-permission android:name="android.permission.USE_SIP" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

<uses-feature
    android:name="android.hardware.wifi"
    android:required="true" />
<uses-feature
    android:name="android.hardware.microphone"
    android:required="true" />

<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CALL_PRIVILEGED" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />

<application
    android:debuggable="true"
    android:icon="@drawable/logo_linphone_57x57"
    android:label="SIP Dialer" >
    <activity
        android:name=".WalkieTalkieActivity"
        android:configChanges="orientation|keyboardHidden" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".SipSettings"
        android:label="set_preferences" />
    <activity
        android:name=".dialer"
        android:label="@string/app_name" />
    <activity
        android:name=".timer"
        android:label="@string/app_name" />
    <activity
        android:name=".d1"
        android:label="@string/app_name" />
    <activity
        android:name=".IncomingCallPage"
        android:label="@string/app_name" />

    **<receiver
        android:name=".IncomingCallReceiver"
        android:enabled="true"
        android:label="Call Receiver" >
        <intent-filter>
            <action android:name="android.SipDemo.INCOMING_CALL" />
        </intent-filter>
    </receiver>**
</application>

在运行C中的错误此$ C $是：六月3日至19日：54：00.137：E / AndroidRuntime（1699年）：在com.example.android.sip.IncomingCallPage $ 1.onClick（ IncomingCallPage.java:30）

推荐答案

你创建的实例？

incomingCallReceiver=new IncomingCallReceiver();

或者改变你的方法静态

or change you method to static

public static void acceptCall() 

//并调用这在IncomingCallPage

//and call this in your IncomingCallPage

IncomingCallReceiver.acceptCall()

这篇关于应用程序崩溃，而使用不同类的方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！