Question

我尝试创建一个带有2个可点击按钮的小部件，这些按钮使用AppWidgetProvider中的onUpdate方法将其处理程序连接到它们。但是，广播消息没有被接收。有人有任何想法吗？

MainActivity：

public class MainActivity extends ActionBarActivity implements View.OnClickListener {
    private static final String TAG = "MainActivity";

    private IRThread irThread;

    private Handler handler;
    private boolean onOff = false;
    private static HashMap<Integer, Integer> codeLookup = new HashMap<>();
    static {
        codeLookup.put(R.id.up_button, AuraGlowCodes.BRIGHTNESS_UP);
        codeLookup.put(R.id.down_button, AuraGlowCodes.BRIGHTNESS_DOWN);

        codeLookup.put(R.id.green_button, AuraGlowCodes.COLOR_GREEN);
        codeLookup.put(R.id.red_button, AuraGlowCodes.COLOR_RED);
        codeLookup.put(R.id.blue_button, AuraGlowCodes.COLOR_BLUE);
        codeLookup.put(R.id.red_button_2, AuraGlowCodes.COLOR_RED_2);
        codeLookup.put(R.id.blue_button_2, AuraGlowCodes.COLOR_BLUE_2);
        codeLookup.put(R.id.green_button_2, AuraGlowCodes.COLOR_GREEN_2);
        codeLookup.put(R.id.red_button_3, AuraGlowCodes.COLOR_RED_3);
        codeLookup.put(R.id.blue_button_3, AuraGlowCodes.COLOR_BLUE_3);
        codeLookup.put(R.id.green_button_3, AuraGlowCodes.COLOR_GREEN_3);
        codeLookup.put(R.id.red_button_4, AuraGlowCodes.COLOR_RED_4);
        codeLookup.put(R.id.blue_button_4, AuraGlowCodes.COLOR_BLUE_4);
        codeLookup.put(R.id.green_button_4, AuraGlowCodes.COLOR_GREEN_4);

        codeLookup.put(R.id.flash_button, AuraGlowCodes.PATTERN_FLASH);
        codeLookup.put(R.id.fade_button, AuraGlowCodes.PATTERN_FADE);
        codeLookup.put(R.id.smooth_button, AuraGlowCodes.PATTERN_SMOOTH);
        codeLookup.put(R.id.strobe_button, AuraGlowCodes.PATTERN_STROBE);


    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        irThread = new IRThread(getApplicationContext());
        handler = irThread.getHandler();

        findViewById(R.id.onOff_button).setOnClickListener(this);
        findViewById(R.id.up_button).setOnClickListener(this);
        findViewById(R.id.down_button).setOnClickListener(this);

        findViewById(R.id.red_button).setOnClickListener(this);
        findViewById(R.id.green_button).setOnClickListener(this);
        findViewById(R.id.blue_button).setOnClickListener(this);

        findViewById(R.id.red_button_2).setOnClickListener(this);
        findViewById(R.id.green_button_2).setOnClickListener(this);
        findViewById(R.id.blue_button_2).setOnClickListener(this);

        findViewById(R.id.red_button_3).setOnClickListener(this);
        findViewById(R.id.green_button_3).setOnClickListener(this);
        findViewById(R.id.blue_button_3).setOnClickListener(this);

        findViewById(R.id.red_button_4).setOnClickListener(this);
        findViewById(R.id.green_button_4).setOnClickListener(this);
        findViewById(R.id.blue_button_4).setOnClickListener(this);

        findViewById(R.id.flash_button).setOnClickListener(this);
        findViewById(R.id.fade_button).setOnClickListener(this);
        findViewById(R.id.strobe_button).setOnClickListener(this);
        findViewById(R.id.smooth_button).setOnClickListener(this);

        Intent intent = new Intent(this, WidgetProvider.class);
        intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
        sendBroadcast(intent);
        Log.e("[HERE]", "SENT BROADCAST");
    }

    @Override
    public void onClick(View v) {
        int val = 0;

        switch (v.getId()){
            case R.id.onOff_button:
                if (onOff){
                    val = AuraGlowCodes.TURN_OFF;
                } else {
                    val = AuraGlowCodes.TURN_ON;
                }
                onOff=!onOff;
                break;
            default:
                val = codeLookup.get(v.getId());
                break;
        }
        Log.wtf("[fuck]", Integer.toHexString(val));

        int[] pattern = NECFactory
                .createCommand()
                .addInteger(val, (byte)32)
                .getPattern(5);
        Message msg = handler.obtainMessage(IRThread.MSG_NAME, pattern);
        handler.sendMessage(msg);

    }
}

AndroidManifest：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="io.github.dadude941.auraglowremote">

    <uses-permission android:name="android.permission.TRANSMIT_IR" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme">
        <activity
            android:name=".ui.MainActivity"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name="io.github.dadude941.auraglowremote.ui.WidgetProvider" >
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>
            <meta-data android:name="android.appwidget.provider"
                android:resource="@xml/example_appwidget_info" />
        </receiver>
    </application>


</manifest>

WidgetProvider.java：

package io.github.dadude941.auraglowremote.ui;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.RemoteViews;

import io.github.dadude941.auraglowremote.R;

/**
 * Created by Miguel Boland on 06/03/2015.
 */
    public class WidgetProvider extends AppWidgetProvider {
    public final static String WIDGET_ON_BUTTON = "MY_PACKAGE_NAME.WIDGET_BUTTON";
    public final static String WIDGET_OFF_BUTTON = "MY_PACKAGE_NAME.WIDGET_BUTTON2";

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds){
        Log.e("[onUpdate]", "UPDATING");
        Intent intent = new Intent(WIDGET_ON_BUTTON);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget);
        remoteViews.setOnClickPendingIntent(R.id.on_button, pendingIntent);

        Intent intent2 = new Intent(WIDGET_OFF_BUTTON);
        PendingIntent pendingIntent2 = PendingIntent.getBroadcast(context, 0, intent2, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setOnClickPendingIntent(R.id.off_button, pendingIntent2);

    }

    @Override
    public void onReceive(Context context, Intent intent){
        switch(intent.getAction()){
            case WIDGET_ON_BUTTON:
                Log.e("[onReceive]", "ON BUTTON");
                break;

            case WIDGET_OFF_BUTTON:
                Log.e("[onReceive]", "OFF BUTTON");
                break;
        }
    }
}

Answer 1

首先不要发送广播意图ACTION_APPWIDGET_UPDATE。这是Android自己发送的，因此您无需发送它。 Android会在设备启动时发送此消息，并根据您的小部件的配置定期发送。

此外，您通过实施onReceive()和onUpdate()来破坏您的小部件代码。 AppWidgetProvider类只是一个便利类，可以为您进行一些处理。它扩展BroadcastReceiver并覆盖onReceive()方法。触发接收器并调用onReceive()时，它会从Intent中提取ACTION和其他参数，然后调用onUpdate()，onDeleted()，onEnabled()之一或onDisabled()。由于您已在onReceive()课程中覆盖了WidgetProvider，因此您的实施将被调用。由于您的onReceive()方法无法调用super.onReceive()，onReceive()的{{1}}方法永远不会被调用，这就是为什么它永远不会调用AppWidgetProvider。< / p>

可能的解决方案：

1）在onUpdate()中，如果ACTION不是您感兴趣的，请务必致电WidgetProvider.onReceive()，让超级班有机会做到这一点。

2）创建一个单独的类来处理您要发送的广播Intents（即：super.onReceive()和WIDGET_ON_BUTTON）并且不要使用您的WIDGET_OFF_BUTTON类来处理这些。它只是让事情混乱。

未收到广播消息

1 个答案: