android从contentobserver发送广播消息

Question

我有一类contentobserver ，我想从contentobserver发送广播消息。 但是，当其调用应用崩溃时，我看到logcate上下文为null请告诉我如何从contentresolver发送消息。 这是我的代码：

public class SettingsContentObserver extends ContentObserver {

    Context context;
    public SettingsContentObserver(Handler handler) {
        super(handler);
    }

    @Override
    public boolean deliverSelfNotifications() {
        return super.deliverSelfNotifications();
    }

    @Override
    public void onChange(boolean selfChange) {
        super.onChange(selfChange);

        //Profile1Activity.profile1(context);

        Intent i = new Intent("settingschanged");
        context.sendBroadcast(i);
    }
}

Answer 1

您可以尝试将应用程序上下文传递给ContentObserver吗？

public class SettingsContentObserver extends ContentObserver {

    Context mContext;
    public SettingsContentObserver(Handler handler, Context context) {
        super(handler);
        this.mContext = context;
    }

    @Override
    public boolean deliverSelfNotifications() {
        return super.deliverSelfNotifications();
    }

    @Override
    public void onChange(boolean selfChange) {
        super.onChange(selfChange);

        //Profile1Activity.profile1(context);

        Intent i = new Intent("settingschanged");
        mContext.sendBroadcast(i);
    }
}