通过服务重绘 Activity
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>
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