android – 任何人都可以帮我理解我程序的线程吗？

我向你们寻求一个程序的帮助,似乎它会起作用.如果我能让线程/ asynctask工作.我已经尝试过使用线程,但我没有让它工作.我试图进行线程化的原因是因为我的程序在加载时崩溃了,基本上它假设要做的是发送电子邮件,如果有人正在打电话,因为我总是错放我的手机或者保持静音,我我不知道.

服务-

    public class Callservice extends Service {

    PhoneStateListener listener;
    TelephonyManager tm;

    @Override
    public void onCreate()
    {
           Toast.makeText(getApplicationContext(),"Service has started",Toast.LENGTH_LONG).show();
            listener = new MyphoneStateListener();
            tm = (TelephonyManager)getSystemService(TELEPHONY_SERVICE);
            tm.listen(listener,PhoneStateListener.LISTEN_CALL_STATE);



    }

        public class MyphoneStateListener extends PhoneStateListener
        {
            public void onCallStateChanged(int state,String incomingNumber)
            {
                 switch (state) {  
                    case TelephonyManager.CALL_STATE_IDLE:   
                        break;  
                    case TelephonyManager.CALL_STATE_RINGING: 
                       sendemail(); 
                        break;  
                    case TelephonyManager.CALL_STATE_OFFHOOK:  
                    default:  
                        break;  
                    }  
                    super.onCallStateChanged(state,incomingNumber);  
                }
            }

            private void sendemail()
            {
                Intent i = new Intent(Intent.ACTION_SEND);
                i.setType("message/rfc822");
                i.putExtra(Intent.EXTRA_EMAIL,new String[]{"random@gmail.com"});
                i.putExtra(Intent.EXTRA_SUBJECT,"phone is ringing");
                i.putExtra(Intent.EXTRA_TEXT,"email successfully sent");
                startActivity(Intent.createChooser(i,"send mail..."));
                Toast.makeText(getApplicationContext(),"Email has been sent",Toast.LENGTH_LONG).show();

                    try
                    {
                        startActivity(Intent.createChooser(i,"Send Email..."));
                    }
                    catch(android.content.ActivityNotFoundException ex)
                    {

                    }
            }


    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }

}

活动-

public class MainActivity extends Activity {


    Callservice callservice = new Callservice();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        callservice.onCreate();
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main,menu);
        return true;
    }

}

最佳答案

更改MainActivity活动以及从Activity启动Service：

    public class MainActivity extends Activity {

    //Callservice callservice = new Callservice();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        startService(new Intent(this,Callservice.class));
    }
   // your code here...

并确保您已在AndroidManifest.xml中添加了您的服务：


 原文链接：https://www.f2er.com/android/430750.html

android – 任何人都可以帮我理解我程序的线程吗？

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