toast不能显示，求指教

Question

这是小弟写的代码，在API10的手机运行无问题，但是在 API19的手机试运行时却无法在收到信息时显示toast，请问该怎么解决？小弟是初学者，请以简单的方式解释，最好能展示代码，万分感谢！

在网络上搜到应该添加
flag_include_stopped_packages
，请问该怎么添加？

IncomingSms.java

public class IncomingSms extends BroadcastReceiver {
final SmsManager sms = SmsManager.getDefault();

    public void onReceive(Context context,Intent intent) {
        final Bundle bundle = intent.getExtras();
        try {
            if (bundle != null) {
                final Object[] pdusObj = (Object[]) bundle.get("pdus");
                for (int i = 0; i < pdusObj.length; i++) {
                    SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]);
                    String message = currentMessage.getDisplayMessageBody();
                    String senderNum = currentMessage.getDisplayOriginatingAddress();
                    Log.i("SmsReceiver", senderNum + message);
                    Toast.makeText(context,
                            "send from " + senderNum + message, Toast.LENGTH_LONG).show();

                }
            }
        } catch (Exception e) {
            Log.e("SmsReceiver", "Exception smsReceiver" + e);
        }
    }
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.security.security" >

    <uses-permission android:name="android.permission.RECEIVE_SMS"/>
    <uses-permission android:name="android.permission.READ_SMS"/>
    <uses-permission android:name="android.permission.SEND_SMS"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".SMS"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
                <category android:name="android.intent.category.INFO"/>
            </intent-filter>
        </activity>
        
        <receiver android:name=".IncomingSms">
            <intent-filter android:priority="999">
                <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
                </intent-filter>
        </receiver>

    </application>

</manifest>

SMS.java

public class SMS extends AppCompatActivity {



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


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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Answer 1

api10能显示说明代码应该没问题，去看看api19的手机设置里该应用有没有禁用通知

Answer 2

你可以看下这个，至少google的官方文档说从android 3.1开始自动给所有intent添加了flag_exclude_stopped_packages，所以在api19的手机上，app被杀掉后就无法收到系统广播了。