这里我正在调用USSD代码，然后我试图通过扩展AccessibilityService来读取相应的响应。这个过程很好。 但我的问题是当我尝试使用LocalBroadCast Manager将相应的数据（或值）传输到活动说（MainActivity.java）甚至不调用BroadcastReceiver时。
任何人都可以帮我使用LocalBroadcastManager将数据传输到活动吗？
请在下面找到我的java课程。
MainActivity.java
public class MainActivity extends AppCompatActivity {
EditText edt_ussd;
String callstring = "";
Button btn_call;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
edt_ussd = (EditText) findViewById(R.id.editText);
btn_call = (Button) findViewById(R.id.btn_call);
btn_call.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startService(new Intent(MainActivity.this, UssdDemo.class));
call_Ussd(edt_ussd.getText().toString().trim());
}
});
LocalBroadcastManager.getInstance(MainActivity.this).registerReceiver(mMsgReceiver,
new IntentFilter("test_ussd.twinkletech.org.ussd_test.LBroadCst"));
}
public void call_Ussd(String ussd) {
String s = edt_ussd.getText().toString();//calledittext is editText on the
//screen from which can get the number
if ((s.startsWith("*")) && (s.endsWith("#"))) {
//if true then it is a USSD call----
callstring = s.substring(0, s.length() - 1);
callstring = callstring + Uri.encode("#");
Log.d("CALL TYPE---------->", "USSD CALL");
System.out.println("==== output : " + callstring);
} else {
callstring = s;
Log.d("CALL TYPE---------->", "Not a USSD CALL");
}
System.out.println("==== callstring : " + callstring);
Intent i = new Intent(android.content.Intent.ACTION_CALL, Uri.parse("tel:" + callstring));
startActivity(i);
}
@Override
protected void onResume() {
super.onResume();
System.out.println("--Coming inside onResume--");
LocalBroadcastManager.getInstance(MainActivity.this).registerReceiver(mMsgReceiver, new IntentFilter("test_ussd.twinkletech.org.ussd_test.LBroadCst"));
}
@Override
protected void onPause() {
super.onPause();
System.out.println("--Coming inside onPause--");
LocalBroadcastManager.getInstance(MainActivity.this).unregisterReceiver(mMsgReceiver);
}
private BroadcastReceiver mMsgReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
System.out.println("-->> Msg received from LOCAL broadcast receiver MainActivity >>>>>>>>>>");
System.out.println("-->> Get actiion : "+intent.getAction());
System.out.println("-->> Intent value : "+intent.getStringExtra("response_msg"));
}
} ;
@Override
protected void onDestroy() {
super.onDestroy();
// Unregister since the activity is about to be closed
LocalBroadcastManager.getInstance(MainActivity.this).unregisterReceiver(mMsgReceiver);
}
}
UssdDemo.java
public class UssdDemo extends AccessibilityService {
public static String TAG = "UssdDemo";
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
System.out.println("<<< onAccessbltyEvent");
String text = event.getText().toString();
System.out.println("<<< --- : " + text);
if (event.getClassName().equals("android.app.AlertDialog")) {
performGlobalAction(GLOBAL_ACTION_BACK);
System.out.println("<<< Return value : " + text);
Intent intent = new Intent();
intent.setAction("test_ussd.twinkletech.org.ussd_test.LBroadCst");
intent.putExtra("response_msg", text);
// write a broad cast receiver and call sendbroadcast() from here, if you want to parse the message for balance, date
LocalBroadcastManager.getInstance(UssdDemo.this).sendBroadcast(intent);
}
}
@Override
public void onInterrupt() {
}
@Override
protected void onServiceConnected() {
super.onServiceConnected();
Log.d(TAG, "onServiceConnected");
AccessibilityServiceInfo info = new AccessibilityServiceInfo();
info.flags = AccessibilityServiceInfo.DEFAULT;
info.packageNames = new String[]{"com.android.phone"};
info.eventTypes = AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED;
info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
setServiceInfo(info);
}}
activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="test_ussd.twinkletech.org.ussd_test.MainActivity"
tools:showIn="@layout/activity_main">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center|top">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="5dp"
android:text="Enter USSD code"
android:textSize="30sp"
android:layout_marginTop="10dp"
android:gravity="center"
android:textStyle="bold"
android:textColor="@color/colorPrimary"
android:shadowColor="#806A6A"
android:shadowDx="7"
android:shadowDy="7"
android:shadowRadius="10"
android:layout_marginBottom="20dp"
/>
<EditText
android:id="@+id/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:paddingLeft="5dp"
android:paddingBottom="10dp"
android:layout_marginTop="30dp"
android:hint="ussd code"
android:inputType="phone" />
<Button
android:id="@+id/btn_call"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="@color/colorPrimary"
android:text="CALL"
android:layout_marginTop="10dp"
android:textColor="@android:color/white"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center|left"
android:layout_marginTop="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="RESPONSE : "
android:textSize="16dp"
android:textColor="@color/colorPrimaryDark"
android:textStyle="bold"
/>
<TextView
android:id="@+id/txt_talkBal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:textColor="@android:color/black"
android:text=""
/>
</LinearLayout>
</LinearLayout>
</ScrollView></LinearLayout>
的Manifest.xml
<service android:name=".UssdDemo"
android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
<intent-filter>
<action android:name="android.accessibilityservice.AccessibilityService" />
</intent-filter>
<meta-data android:name="android.accessibilityservice"
android:resource="@xml/config_service" />
</service>