Question

我想使用此函数接受来电，但如何使用该功能以及如何输入参数？我想用我的班级编辑这个函数。

这是我的功能：

public static void acceptCall(Context context) 
{
    Intent buttonUp = new Intent(Intent.ACTION_MEDIA_BUTTON);
    buttonUp.putExtra(Intent.EXTRA_KEY_EVENT, 
        new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
    context.sendOrderedBroadcast(buttonUp, "android.permission.CALL_PRIVILEGED");
}

这是我的班级：

package com.bitgriff.androidcalls;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.view.KeyEvent;
import android.widget.Toast;

/**
 * Helper class to detect incoming and outgoing calls.
 * @author Moskvichev Andrey V.
 *
 */
public class CallHelper {

    /**
     * Listener to detect incoming calls. 
     */
    private class CallStateListener extends PhoneStateListener {
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            switch (state) {
            case TelephonyManager.CALL_STATE_RINGING:
                // called when someone is ringing to this phone
                //------------------------
                //Not work
                //acceptCall();

                //---------------------------------
                Toast.makeText(ctx, 
                        "Incoming: "+incomingNumber, 
                        Toast.LENGTH_LONG).show();
                break;
            }
        }
    }
    public static void acceptCall(Context context){
        Intent buttonUp = new Intent(Intent.ACTION_MEDIA_BUTTON);
        buttonUp.putExtra(Intent.EXTRA_KEY_EVENT,new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
        context.sendOrderedBroadcast(buttonUp,"android.permission.CALL_PRIVILEGED");
    }

/*
    private void rejectCall(Context context)
    {
        Intent buttonDown = new Intent(Intent.ACTION_MEDIA_BUTTON); buttonDown.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_HEADSETHOOK));
        context.sendOrderedBroadcast(buttonDown, "android.permission.CALL_PRIVILEGED");
    }
    */
    /**
     * Broadcast receiver to detect the outgoing calls.
     */
    public class OutgoingReceiver extends BroadcastReceiver {
        public OutgoingReceiver() {
        }

        @Override
        public void onReceive(Context context, Intent intent) {
            String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);

            Toast.makeText(ctx, 
                    "Outgoing: "+number, 
                    Toast.LENGTH_LONG).show();
        }

    }

    private Context ctx;
    private TelephonyManager tm;
    private CallStateListener callStateListener;

    private OutgoingReceiver outgoingReceiver;

    public CallHelper(Context ctx) {
        this.ctx = ctx;

        callStateListener = new CallStateListener();
        outgoingReceiver = new OutgoingReceiver();
    }

    /**
     * Start calls detection.
     */
    public void start() {
        tm = (TelephonyManager) ctx.getSystemService(Context.TELEPHONY_SERVICE);
        tm.listen(callStateListener, PhoneStateListener.LISTEN_CALL_STATE);

        IntentFilter intentFilter = new IntentFilter(Intent.ACTION_NEW_OUTGOING_CALL);
        ctx.registerReceiver(outgoingReceiver, intentFilter);
    }

    /**
     * Stop calls detection.
     */
    public void stop() {
        tm.listen(callStateListener, PhoneStateListener.LISTEN_NONE);
        ctx.unregisterReceiver(outgoingReceiver);
    }
}

Answer 1

这取决于您调用此方法的哪个类。如果您在Activity中，则将this作为参数传递。 if in fragment然后传递getContext(); 如果您在活动内部的线程中，则将ActivityName.this作为参数传递。

Answer 2

在您的代码中，您的类CallHelper不会扩展Activity或Fragment，因此在该类中创建一个构造函数。例如：

class CallHelper{
    private Context context;
    public CallHelper(Context context){
        this.context = context;
    }

}

现在在您的方法中传递上下文。

并在您将此类称为

的活动中

CallHelper callHelper = new CallHelpe();

将此更改为

CallHelper callHelper = new CallHelper(this);

如何使用具有Context的acceptCall函数？

2 个答案: