Question

我希望制作一个可以根据某些参数截取短信的应用。截至目前，我已经注册了一个切换按钮以及SMSReceiver类，但是我无法找到一种方法，只有在启用切换功能时SMSReceiver才能工作，并且当禁用切换时SMSReceiver停止工作。

Main.Java

public class Main扩展Activity {

Intent in = new Intent();
IntentFilter intentFilter;
String drivingMessage;
String originAddress;

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

   intentFilter = new IntentFilter();
   intentFilter.addAction("SMS_RECEIVED_ACTION");

}

BroadcastReceiver intentReceiver = new BroadcastReceiver(){
    @Override
    public void onReceive(Context context, Intent intent){
        originAddress = intent.getExtras().getString("sms");
        Toast.makeText(context, originAddress, Toast.LENGTH_LONG).show();
    }
};

@Override
protected void onResume(){
    registerReceiver(intentReceiver, intentFilter);
    super.onResume();
}

@Override
protected void onPause(){
    unregisterReceiver(intentReceiver);
    super.onPause();
}


public void serviceEnabled(View view){
    ToggleButton tB = (ToggleButton) findViewById(R.id.serviceToggle);


    boolean on = tB.isChecked();

    if(on){
        Toast.makeText(this, " toggle is on ", Toast.LENGTH_SHORT).show();




    } else{
        Toast.makeText(this, " toggle is off " , Toast.LENGTH_SHORT).show();
    }




}

}

SMSReceiver.Java

public class SMSReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent){

    Bundle bundle = intent.getExtras();
    SmsMessage[] msgs = null;
    String str = "SMS From";
    if(bundle != null){
        Object [] pdus = (Object[]) bundle.get("pdus");
        msgs = new SmsMessage[pdus.length];
        for(int i=0; i<msgs.length; i++){
            msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);

            if (i == 0){
                str += msgs[i].getOriginatingAddress();

            }

        }

        Intent broadcastIntent = new Intent();
        broadcastIntent.setAction("SMS_RECEIVED_ACTION");
        broadcastIntent.putExtra("sms", str);
        context.sendBroadcast(broadcastIntent);


        this.abortBroadcast();
    }

}

非常感谢任何帮助，因为这是一个班级的项目。提前谢谢！

Answer 1

由于您的切换按钮是一种用户首选项/设置，您可以将状态保存为SharedPreferences中的布尔标志。
然后在您的SMSReceiver中，在处理传入消息之前，您可以从SharedPreferences检查状态标志。然后继续进行。

public void serviceEnabled(View view){

ToggleButton tB = (ToggleButton) findViewById(R.id.serviceToggle);


boolean on = tB.isChecked();
SharedPreferences preferences=PreferenceManager.getDefaultSharedPreferences(this);
Editor editor=preferences.edit();
editor.putBoolean("is_sms_on", on);
editor.commit();

if(on){
    Toast.makeText(this, " toggle is on ", Toast.LENGTH_SHORT).show();




} else{
    Toast.makeText(this, " toggle is off " , Toast.LENGTH_SHORT).show();
}




}

SMSReceiver.Java

public class SMSReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent){

SharedPreferences preferences=PreferenceManager.getDefaultSharedPreferences(context)
boolean isServiceOn=preferences.getBoolean("is_sms_on",true);
if(isServiceOn){
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String str = "SMS From";
if(bundle != null){
    Object [] pdus = (Object[]) bundle.get("pdus");
    msgs = new SmsMessage[pdus.length];
    for(int i=0; i<msgs.length; i++){
        msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);

        if (i == 0){
            str += msgs[i].getOriginatingAddress();

        }

    }

    Intent broadcastIntent = new Intent();
    broadcastIntent.setAction("SMS_RECEIVED_ACTION");
    broadcastIntent.putExtra("sms", str);
    context.sendBroadcast(broadcastIntent);


    this.abortBroadcast();
}
}

}

Answer 2

取消选中切换按钮时，请尝试取消注册接收器。

public void serviceEnabled(View view){
    ToggleButton tB = (ToggleButton) findViewById(R.id.serviceToggle);


    boolean on = tB.isChecked();

    if(on){
        //your code

    } else{
       unregisterReceiver(intentReceiver);
    }




}

Answer 3

当取消选中切换按钮时，尝试直接从清单中禁用接收器，接收器根本不在图片中。在服务启用功能的else部分使用此功能

PackageManager pm=getPackageManager();
ComponentName componentName=new ComponentName(getApplicationContext(),yourreceiver.class);//where yourreceiver is the name of your receiver class
      pm.setComponentEnabledSetting(componentName,PackageManager.COMPONENT_ENABLED_STATE_DISABLED,PackageManager.DONT_KILL_APP);

如何从切换按钮按下调用SMSReceiver类

3 个答案: