如何从通知中触发广播接收器
我想从通知中触发广播接收器。 当我点击一个正在通知的按钮时，它显示这个错误：
“无法实例化接收器com.example.testservice.myBroad：java.lang.ClassCastException：com.example.testservice.myBroad无法转换为android.content.BroadcastReceiver”
*更新/编辑，现在它的工作* 1）嘿，你可以请帮忙处理通知广播reciver 2按钮我怎么能通过额外的价值从通知广播触发器接收器，它的播放按钮按下或暂停？ 2）现在我的按钮工作，但当我点击通知文本，它不会把我带入我的活动。 任何帮助
我写了这个代码2意图额外的按钮
RemoteViews layout = new RemoteViews(getPackageName(), R.layout.notification);
layout.setTextViewText(R.id.notification_title, getString(R.string.app_name));
Intent clickIntent = new Intent();
clickIntent.putExtra("button","pause");
clickIntent.setAction(ACTION_DIALOG);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), pendingRequestCode, clickIntent, pendingFlag);
layout.setOnClickPendingIntent(R.id.notification_button,pendingIntent);
builder.setContent(layout);
layout = new RemoteViews(getPackageName(), R.layout.notification);
layout.setTextViewText(R.id.notification_title, getString(R.string.app_name));
Intent click = new Intent();
clickIntent.putExtra("Button","play");
clickIntent.setAction(ACTION_DIALOG);
PendingIntent pi1 = PendingIntent.getBroadcast(getApplicationContext(), pendingRequestCode, click, pendingFlag);
layout.setOnClickPendingIntent(R.id.notification_button1,pi1);
builder.setContent(layout);
myBroad接收器文件
Bundle extrasBundle = intent.getExtras();
String str = (String) extrasBundle.get("button");
Toast.makeText(context, str, Toast.LENGTH_SHORT).show();
context.stopService(new Intent(context, myPlayService.class));
这是我的代码：
void showNotification() {
int pendingRequestCode = 0;
int pendingFlag = 0;
final Resources res = getResources();
final NotificationManager notificationManager = (NotificationManager) getSystemService(
NOTIFICATION_SERVICE);
Intent intent = new Intent(MainActivity.this,myBroad.class);
PendingIntent pi= PendingIntent.getActivity(this, 0, intent, 0);
Notification.Builder builder = new Notification.Builder(this)
.setSmallIcon(R.drawable.ic_action_search)
.setAutoCancel(true)
.setTicker("this is notification")
.setContentIntent(getDialogPendingIntent("Tapped the notification entry."));
// Sets a custom content view for the notification, including an image button.
RemoteViews layout = new RemoteViews(getPackageName(), R.layout.notification);
layout.setTextViewText(R.id.notification_title, getString(R.string.app_name));
Intent clickIntent = new Intent();
clickIntent.setAction(ACTION_DIALOG);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), pendingRequestCode, clickIntent, pendingFlag);
layout.setOnClickPendingIntent(R.id.notification_button,pendingIntent);
builder.setContent(layout);
// Notifications in Android 3.0 now have a standard mechanism for displaying large
// bitmaps such as contact avatars. Here, we load an example image and resize it to the
// appropriate size for large bitmaps in notifications.
Bitmap largeIconTemp = BitmapFactory.decodeResource(res,
R.drawable.notification_default_largeicon);
Bitmap largeIcon = Bitmap.createScaledBitmap(
largeIconTemp,
res.getDimensionPixelSize(android.R.dimen.notification_large_icon_width),
res.getDimensionPixelSize(android.R.dimen.notification_large_icon_height),
false);
largeIconTemp.recycle();
builder.setLargeIcon(largeIcon);
notificationManager.notify(NOTIFICATION_DEFAULT, builder.getNotification());
}
PendingIntent getDialogPendingIntent(String dialogText) {
return PendingIntent.getActivity(
this,
dialogText.hashCode(), // Otherwise previous PendingIntents with the same
// requestCode may be overwritten.
new Intent(ACTION_DIALOG)
.putExtra(Intent.EXTRA_TEXT, dialogText)
.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK),
0);
}
myBroad.class
public class myBroad extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Toast.makeText(context, "received", Toast.LENGTH_SHORT).show();
context.stopService(new Intent(context, myPlayService.class));
}
}
清单文件是：
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".myBroad">
<intent-filter >
<action android:name="android.intent.action.MEDIA_BUTTON"/>
</intent-filter>
</receiver>
<service android:name="com.example.testservice.myPlayService" android:icon="@drawable/ic_action_search" android:label="@string/app_name" android:enabled="true"/>
</application>
因为myBroad是一个活动对象，而不是广播对象...
而不是从活动扩展（继承），然后创建一个扩展broadcastreceiver的内部类，然后直接从broadcastreceiver继承。
在你的getDialogPendingIntent方法中，你应该使用PendingIntent.getBroadcast来代替PendingIntent.getActivity 。 这将导致您的PendingIntent推送广播 。
并解决这个问题：
public class myBroad extends BroadcastReceiver
异常说清楚-你myBroad不得不延长BroadcastReceiver ，不Activity象现在这样。
PS：你应该考虑改用适当的命名方式。 所以它应该是MyBroad （类），但myBroad （该类的对象）。 即：
MyBroad myBroad = new MyBroad();