android - BroadCast Reveiver は電源ボタンのクリックをカウントしていますが、最小化されたアクティビティを再開できません

Question

このコードでは：

1. public クラス MyReceiver は BroadcastReceiver を拡張します 2. public クラス MainActivity は Activity を拡張します

アプリケーションが起動したら、HOME ボタンを押して最小化します。その後、MyRecevier は LOGCAT に表示される電源ボタンのカウントをカウントしますが、MyReceiver は最小化されたアクティビティ (MAINACTIVITY またはその他の新しいアクティビティ) を起動 (画面に表示) できません。

PS特定のクリック後にアクティビティを開始したい。

MyReceiver.java

public class MyReceiver extends BroadcastReceiver{
final static String TAG = "customTAG";

 static int countPowerOff=0;
    private Activity activity=null;
    public MyReceiver (Activity activity)
    {
    this.activity=activity;
    }
    @Override
    public void onReceive(Context context, Intent intent) {

      Log.d(TAG, "Power button is pressed.");
      Log.d(TAG, "Power button count is " +countPowerOff);
      Toast.makeText(context, "power button clicked", Toast.LENGTH_SHORT).show();

if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) 
{
    countPowerOff++;    
    Log.d(TAG, "Action OFF!! Power count increased .");
    Log.d(TAG, "Power button count is " +countPowerOff);

} 
else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) 
{
    Log.d(TAG, "ACTION SCREEN ON");
    Log.d(TAG, "Power button count is " +countPowerOff);

      if(countPowerOff>2)
      {
          Log.d(TAG, "Power button count is " +countPowerOff);
          Log.d(TAG, "Count is greater than 2 now it should start ");
          countPowerOff=0;
          Toast.makeText(context, "MAIN ACTIVITY IS BEING CALLED ", Toast.LENGTH_LONG).show();

          Intent i = new Intent(activity,MainActivity.class);
              //I have tired different flags!!
              //below lines are not making any effect unable to popup MainActivity
          i.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
          activity.startActivity(i);
          context.startService(i);         

       }
    }
}}

MainActivity.java

public class MainActivity extends Activity {
static int a = 0;
MyReceiver mReceiver;
final static String TAG = "customTAG";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
    filter.addAction(Intent.ACTION_SCREEN_OFF);        
    mReceiver = new MyReceiver (this);
    registerReceiver(mReceiver, filter);
    a++;
    Log.d(TAG, "onCreate Event count : " +a);      
}

public void onNewIntent()
{
    Log.d(TAG, "onNewIntent started !!");
}

public void onStart()
{
    super.onStart();
    Log.d(TAG, "onStart event Occured  !!");
}

public void onResume()
{
    super.onResume();
    Log.d(TAG, "onResume event occured !!");
}



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

AndroidManifest.xml

<application>
 ..
 ..
 ..
 ..
<receiver android:name="MyReceiver"> 
           <intent-filter>
            <action android:name="android.intent.action.ACTION_SCREEN_ON"></action>
            <action android:name="android.intent.action.ACTION_SCREEN_OFF"></action>                
        </intent-filter>
         </receiver>
</application>