Question

您是否可以实现在后台运行的Android应用程序，以便在不点击应用程序图标的情况下打开某个事件？

Answer 1

我们可以使用广播接收器启动应用并定义意图动作：

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
 /** This class is used to register the broadcast receiver 
  * as soon as device boot completes this broadcast receiver functionality comes into function and you can launch your application */
public class HomeScreenLaunch extends BroadcastReceiver {

 @Override
 public void onReceive(Context context, Intent intent) {
    if(intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)){
        Intent launch = new Intent(context, ActivityName.class);
        launch.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(launch);
    }   
 }

}

以下是在清单文件中定义此广播接收器的代码：

<receiver
        android:name="com.xyz.HomeScreenLaunch"
        android:enabled="true"
        android:exported="true" >
        <intent-filter android:priority="999" >
            <action android:name="android.intent.action.BOOT_COMPLETED" />
        </intent-filter>
</receiver>

Answer 2

在要通过事件侦听器启动的OnCreate活动方法中，您需要添加以下代码。这将唤醒设备并自动解锁以自行启动。

 KeyguardManager.KeyguardLock lock = ((KeyguardManager) getSystemService(Activity.KEYGUARD_SERVICE)).newKeyguardLock(KEYGUARD_SERVICE);
        PowerManager powerManager = ((PowerManager) getSystemService(Context.POWER_SERVICE));
        PowerManager.WakeLock wake = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "TAG");

        lock.disableKeyguard();
        wake.acquire();

        getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
                | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
                | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
                | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_accept_reject);

用于收听事件广播接收器的使用。它们有两种类型：1）静态注册（需要清单权限） 2）动态注册（不需要清单权限）对于第一种类型，您可以参考Rohit Sharma先生的回答。对于第二种类型，我附上以下代码。

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.telephony.SmsMessage;
import android.util.Log;


public class SmsService extends Service {

    private String Sender=null;
    private String Code=null;
    public void setCode(String code){
        Code=code;
    }
    public void setSender(String sender){
        Sender=sender;
    }
    private IBinder mBinder = new MyBinder();
    private BroadcastReceiver smsReceiver;

    private static final String ACTION="android.provider.Telephony.SMS_RECEIVED";

    @Override
    public void onCreate(){
        smsReceiver=new BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {
                // Do whatever you need it to do when it receives the broadcast
                // Example show a Toast message...
                Bundle extras = intent.getExtras();
                Log.i("Receiver","broadcast received");

                if (extras == null)
                    return;

                Object[] pdus = (Object[]) extras.get("pdus");
                SmsMessage msg = SmsMessage.createFromPdu((byte[]) pdus[0]);
                String origNumber = msg.getOriginatingAddress();
                String msgBody = msg.getMessageBody();
                Log.i("Receiver",origNumber);
                Log.i("Receiver",msgBody);
                Log.i("Receiver", intent.toString());

                if(Sender!=null && origNumber.contains(Sender)){
                    if(Code!=null && msgBody.contains(Code)){
                        Log.i("Receiver","matched");
                    }
                }
            }
        };

        final IntentFilter theFilter = new IntentFilter();
        theFilter.addAction(ACTION);
        theFilter.setPriority(2147483647);
        this.registerReceiver(this.smsReceiver, theFilter);
        Log.i("Received","service");
    }


    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        return mBinder;
    }

    public class MyBinder extends Binder {
        public SmsService getService() {
            return SmsService.this;
        }
    }

    @Override
    public void onDestroy(){
        super.onDestroy();
        unregisterReceiver(smsReceiver);

    }
}

无需点击图标即可自动打开Android应用

2 个答案: