通过服务重绘 Activity

发布于 2024-11-30 05:21:25 字数 2819 浏览 0 评论 0原文

我用我的主要活动来绘制文本。现在我有一个后台服务来监听蓝牙设备。如果按下设备上的按钮,我会在本地数据库中插入值,并希望在主活动中重新绘制正确的值。一切正常 - 只是重绘不起作用,因为我无法从我的服务中调用 invalidate() 方法。

我尝试使用 BroadCastReceiver 但我想我误解了一些东西。


这是我的服务“ControllerService”中的方法

private void insertToDB(int iWert, char c) {
   if(zt.getJoystickMoved().x == iWert) {
      sendOrderedBroadcast(i,null);
      Log.i("Broadcast","send!");
      //in this block i want to notify the Activity
   }
}

这是我的主要活动

public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   registerReceiver(resetReceiver, new IntentFilter("my.intent.INTENT_NAME"));
}

public BroadcastReceiver resetReceiver = new BroadcastReceiver() {
   @Override
   public void onReceive(Context context, Intent intent) {
      Log.i("Broadcast", "got Broadcast!");
      MainActivity.this.cc.invalidate();
      //cc.invalidate() repaints my Activity
      //cc is a View with the paint Logic inside
      this.setResultCode(Activity.RESULT_OK);
   }
}

我的主要活动中的广播接收器没有收到任何内容... 我希望有人能帮助我解决我的问题。


在我的 AndroidManifest 中有这段代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.test.countV1"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="10" />
    <uses-permission android:name="android.permission.VIBRATE"/>
    <uses-permission
        android:name="android.permission.BLUETOOTH" />
    <uses-permission 
        android:name="android.permission.BLUETOOTH_ADMIN" />

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:name="com.test.data.ListHelper">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <action android:name="my.intent.INTENT_NAME"/>
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:label="PreferencesActivity" android:name="PreferencesActivity"></activity>
        <activity android:name="ZtPreferencesActivity" android:label="ZtPreferencesActivity"></activity>
        <activity android:name="customizePreferences"></activity>
        <activity android:name="ControllerActivity"></activity>
        <service android:name="com.test.services.ControllerService"></service>
        <activity android:name="BatteryActivity"></activity>
    </application>
</manifest>

I use my Main Activity to paint Text. Now Ive a Service in Background that listens to a bluetooth device. If a button on the device is pressed I insert values in the local database and want to repaint the correct value in my Main Activity. Everything works fine - just the repaint does not work, because i cant call the invalidate() method from my Service.

I tried with a BroadCastReceiver but i think i misunderstood something.


This is my Method in my Service "ControllerService"

private void insertToDB(int iWert, char c) {
   if(zt.getJoystickMoved().x == iWert) {
      sendOrderedBroadcast(i,null);
      Log.i("Broadcast","send!");
      //in this block i want to notify the Activity
   }
}

Here is my Main Activity

public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   registerReceiver(resetReceiver, new IntentFilter("my.intent.INTENT_NAME"));
}

public BroadcastReceiver resetReceiver = new BroadcastReceiver() {
   @Override
   public void onReceive(Context context, Intent intent) {
      Log.i("Broadcast", "got Broadcast!");
      MainActivity.this.cc.invalidate();
      //cc.invalidate() repaints my Activity
      //cc is a View with the paint Logic inside
      this.setResultCode(Activity.RESULT_OK);
   }
}

My Broadcast Receiver in my Main Activity does not receive anything ...
I hope someone could help me with my Problem.


In my AndroidManifest is this code

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.test.countV1"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="10" />
    <uses-permission android:name="android.permission.VIBRATE"/>
    <uses-permission
        android:name="android.permission.BLUETOOTH" />
    <uses-permission 
        android:name="android.permission.BLUETOOTH_ADMIN" />

    <application android:icon="@drawable/icon" android:label="@string/app_name" android:name="com.test.data.ListHelper">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <action android:name="my.intent.INTENT_NAME"/>
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:label="PreferencesActivity" android:name="PreferencesActivity"></activity>
        <activity android:name="ZtPreferencesActivity" android:label="ZtPreferencesActivity"></activity>
        <activity android:name="customizePreferences"></activity>
        <activity android:name="ControllerActivity"></activity>
        <service android:name="com.test.services.ControllerService"></service>
        <activity android:name="BatteryActivity"></activity>
    </application>
</manifest>

如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。

扫码二维码加入Web技术交流群

发布评论

需要 登录 才能够评论, 你可以免费 注册 一个本站的账号。
列表为空,暂无数据
我们使用 Cookies 和其他技术来定制您的体验包括您的登录状态等。通过阅读我们的 隐私政策 了解更多相关信息。 单击 接受 或继续使用网站,即表示您同意使用 Cookies 和您的相关数据。
原文