在调用状态更改期间，无法在Android应用程序中显示浮动窗口

mu0hgdu0  于 2024-01-04  发布在  Android
关注(0)|答案(1)|浏览(129)

我正在开发一个Android应用程序，我需要在调用状态更改期间显示浮动窗口并将事件发送到React Native应用程序。没有浮动窗口，事件发送成功，但当尝试显示浮动窗口时，我遇到以下错误：

  1. FATAL EXCEPTION: main
  2. Process: com.arunkavale.test, PID: 19533
  3. java.lang.RuntimeException: Unable to start receiver com.arunkavale.test.CallReceiver: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object com.facebook.react.bridge.ReactApplicationContext.getSystemService(java.lang.String)' on a null object reference
  4.     at android.app.ActivityThread.handleReceiver(ActivityThread.java:4905)
  5.     at android.app.ActivityThread.-$$Nest$mhandleReceiver(Unknown Source:0)
  6.     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2498)
  7.     at android.os.Handler.dispatchMessage(Handler.java:106)
  8.     at android.os.Looper.loopOnce(Looper.java:230)
  9.     at android.os.Looper.loop(Looper.java:319)
  10.     at android.app.ActivityThread.main(ActivityThread.java:8893)
  11.     at java.lang.reflect.Method.invoke(Native Method)
  12.     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:608)
  13.     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
  14. Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object com.facebook.react.bridge.ReactApplicationContext.getSystemService(java.lang.String)' on a null object reference
  15.     at com.arunkavale.test.CallModule.showFloatingWindow(CallModule.java:51)
  16.     at com.arunkavale.test.CallModule.sendEvent(CallModule.java:40)
  17.     at com.arunkavale.test.CallReceiver.sendEventToReactNative(CallReceiver.java:60)
  18.     at com.arunkavale.test.CallReceiver.onReceive(CallReceiver.java:48)
  19.     at android.app.ActivityThread.handleReceiver(ActivityThread.java:4896)

字符串
下面是一个AndroidManifest文件

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:tools="http://schemas.android.com/tools">
  5.     <uses-feature
  6.         android:name="android.hardware.telephony"
  7.         android:required="false" />
  9.     <uses-permission android:name="android.permission.INTERNET" />
  10.     <uses-permission
  11.         android:name="android.permission.READ_EXTERNAL_STORAGE"
  12.         android:maxSdkVersion="32" />
  13.     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
  14.     <uses-permission android:name="android.permission.VIBRATE" />
  15.     <uses-permission android:name="android.permission.READ_CALL_LOG" />
  16.     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
  17.     <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
  18.     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
  19.     <uses-permission android:name="android.permission.WAKE_LOCK" />
  20.     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
  21.     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
  23.     <queries>
  24.         <intent>
  25.             <action android:name="android.intent.action.VIEW" />
  27.             <category android:name="android.intent.category.BROWSABLE" />
  29.             <data android:scheme="https" />
  30.         </intent>
  31.     </queries>
  33.     <application
  34.         android:name=".MainApplication"
  35.         android:allowBackup="true"
  36.         android:icon="@mipmap/ic_launcher"
  37.         android:label="@string/app_name"
  38.         android:roundIcon="@mipmap/ic_launcher_round"
  39.         android:theme="@style/AppTheme">
  40.         <service
  41.             android:name=".CallBackgroundService"
  42.             android:enabled="true"
  43.             android:exported="false"
  44.             android:foregroundServiceType="mediaProjection"
  45.             tools:targetApi="q" />
  47.         <meta-data
  48.             android:name="expo.modules.updates.ENABLED"
  49.             android:value="false" />
  50.         <meta-data
  51.             android:name="expo.modules.updates.EXPO_SDK_VERSION"
  52.             android:value="49.0.0" />
  53.         <meta-data
  54.             android:name="expo.modules.updates.EXPO_UPDATES_CHECK_ON_LAUNCH"
  55.             android:value="ALWAYS" />
  56.         <meta-data
  57.             android:name="expo.modules.updates.EXPO_UPDATES_LAUNCH_WAIT_MS"
  58.             android:value="0" />
  60.         <activity
  61.             android:name=".MainActivity"
  62.             android:configChanges="keyboard|keyboardHidden|orientation|screenSize|uiMode"
  63.             android:exported="true"
  64.             android:label="@string/app_name"
  65.             android:launchMode="singleTask"
  66.             android:screenOrientation="portrait"
  67.             android:theme="@style/Theme.App.SplashScreen"
  68.             android:windowSoftInputMode="adjustResize">
  69.             <intent-filter>
  70.                 <action android:name="android.intent.action.MAIN" />
  72.                 <category android:name="android.intent.category.LAUNCHER" />
  73.             </intent-filter>
  74.             <intent-filter>
  75.                 <action android:name="android.intent.action.VIEW" />
  77.                 <category android:name="android.intent.category.DEFAULT" />
  78.                 <category android:name="android.intent.category.BROWSABLE" />
  80.                 <data android:scheme="com.arunkavale.test" />
  81.             </intent-filter>
  82.         </activity>
  83.         <activity
  84.             android:name="com.facebook.react.devsupport.DevSettingsActivity"
  85.             android:exported="false" />
  87.         <receiver
  88.             android:name=".CallReceiver"
  89.             android:enabled="true"
  90.             android:exported="false"
  91.             tools:ignore="Instantiatable">
  92.             <intent-filter>
  93.                 <action android:name="android.intent.action.PHONE_STATE" />
  94.             </intent-filter>
  95.         </receiver>
  96.     </application>
  98. </manifest>

型
这是一个CallReceiver

  1. package com.arunkavale.test;
  3. // CallReceiver.java
  4. import android.app.ActivityManager;
  5. import android.content.BroadcastReceiver;
  6. import android.content.Context;
  7. import android.content.Intent;
  8. import android.telephony.TelephonyManager;
  9. import android.util.Log;
  10. import android.widget.Toast;
  12. import android.content.BroadcastReceiver;
  13. import android.content.Context;
  14. import android.content.Intent;
  15. import android.telephony.TelephonyManager;
  16. import android.util.Log;
  18. public class CallReceiver extends BroadcastReceiver {
  20.     @Override
  21.     public void onReceive(Context context, Intent intent) {
  22.         String action = intent.getAction();
  23.         if (action != null && action.equals(TelephonyManager.ACTION_PHONE_STATE_CHANGED)) {
  24.             String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
  25.             if (state != null) {
  26.                 if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
  27.                     // Handle incoming call
  28.                     String phoneNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
  29.                     if (phoneNumber != null) {
  30.                         sendEventToReactNative(context, "INCOMING_CALL", phoneNumber);
  31.                     }
  32.                 } else if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) {
  33.                     // Handle outgoing call or call in progress
  34.                     String phoneNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
  35.                     if (phoneNumber != null) {
  36.                         sendEventToReactNative(context, "OUTGOING_CALL", phoneNumber);
  37.                     }
  38.                 } else if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
  39.                     // Handle call ended
  40.                     String phoneNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
  41.                     if (phoneNumber != null) {
  42.                         sendEventToReactNative(context, "CALL_ENDED", phoneNumber);
  43.                     }
  44.                 }
  45.             }
  46.         }
  47.     }
  49.     private void sendEventToReactNative(Context context, String event, String phoneNumber) {
  50.         Log.d("CallReceiver", "sendEvent " + event + ", phoneNumber: " + phoneNumber);
  52.         // Use your custom native module to send events to React Native
  53.         CallModule.sendEvent(event, phoneNumber);
  55.         // Start the background service only if it hasn't been started yet
  56.         if (!isServiceRunning(context, CallBackgroundService.class)) {
  57.             Intent serviceIntent = new Intent(context, CallBackgroundService.class);
  58.             context.startService(serviceIntent);
  59.         }
  60.     }
  62.     private boolean isServiceRunning(Context context, Class<?> serviceClass) {
  63.         ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
  64.         for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
  65.             if (serviceClass.getName().equals(service.service.getClassName())) {
  66.                 return true;
  67.             }
  68.         }
  69.         return false;
  70.     }
  71. }

型
这里有一个callModule

  1. package com.arunkavale.test;
  3. import android.content.Context;
  4. import android.graphics.PixelFormat;
  5. import android.os.Build;
  6. import android.util.Log;
  7. import android.view.Gravity;
  8. import android.view.LayoutInflater;
  9. import android.view.View;
  10. import android.view.WindowManager;
  11. import android.widget.TextView;
  13. import com.facebook.react.bridge.ReactApplicationContext;
  14. import com.facebook.react.bridge.ReactContextBaseJavaModule;
  15. import com.facebook.react.bridge.ReactMethod;
  16. import com.facebook.react.modules.core.DeviceEventManagerModule;
  18. public class CallModule extends ReactContextBaseJavaModule {
  19.     private static ReactApplicationContext reactContext;
  20.     private static View overlayView;
  22.     public CallModule(ReactApplicationContext context) {
  23.         super(context);
  24.         reactContext = context;
  25.     }
  27.     @Override
  28.     public String getName() {
  29.         return "CallModule";
  30.     }
  32.     @ReactMethod
  33.     public void makeCall(String phoneNumber) {
  34.         // Implement code to make outgoing calls
  35.     }
  37.     static void sendEvent(String eventName, String phoneNumber) {
  38.         Log.d("CallModule", "sendEvent " + eventName
  39.                 + " phoneNumber " + phoneNumber);
  40.         showFloatingWindow(phoneNumber);
  41.         reactContext
  42.                 .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
  43.                 .emit(eventName, phoneNumber);
  44.     }
  46.     static void showFloatingWindow(String phoneNumber) {
  47.         // Get the WindowManager service
  48.         WindowManager windowManager = (WindowManager) reactContext.getSystemService(Context.WINDOW_SERVICE);
  50.         // Inflate the layout for the floating window
  51.         LayoutInflater inflater = (LayoutInflater) reactContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  52.         overlayView = inflater.inflate(R.layout.floating_window_layout, null);
  54.         // Add your custom logic to update the content of the floating window
  55.         TextView textView = overlayView.findViewById(R.id.textView);
  56.         textView.setText("Calling " + phoneNumber);
  58.         // Set window parameters
  59.         WindowManager.LayoutParams params;
  60.         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
  61.             params = new WindowManager.LayoutParams(
  62.                     WindowManager.LayoutParams.WRAP_CONTENT,
  63.                     WindowManager.LayoutParams.WRAP_CONTENT,
  64.                     WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
  65.                     WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
  66.                     PixelFormat.TRANSLUCENT);
  67.         } else {
  68.             params = new WindowManager.LayoutParams(
  69.                     WindowManager.LayoutParams.WRAP_CONTENT,
  70.                     WindowManager.LayoutParams.WRAP_CONTENT,
  71.                     WindowManager.LayoutParams.TYPE_PHONE,
  72.                     WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
  73.                     PixelFormat.TRANSLUCENT);
  74.         }
  76.         params.gravity = Gravity.TOP | Gravity.START;
  77.         params.x = 0;
  78.         params.y = 100;
  80.         // Add the view to the window manager
  81.         windowManager.addView(overlayView, params);
  82.     }
  83. }

型
这里有一个callBackgroundService

  1. package com.arunkavale.test;
  3. import android.app.Service;
  4. import android.content.Intent;
  5. import android.os.IBinder;
  6. import android.util.Log;
  8. // CallBackgroundService.java
  9. import android.app.Service;
  10. import android.content.BroadcastReceiver;
  11. import android.content.Context;
  12. import android.content.Intent;
  13. import android.content.IntentFilter;
  14. import android.os.IBinder;
  15. import android.telephony.PhoneStateListener;
  16. import android.telephony.TelephonyManager;
  17. import android.util.Log;
  19. public class CallBackgroundService extends Service {
  21.     private TelephonyManager telephonyManager;
  22.     private CustomPhoneStateListener phoneStateListener;
  23.     private CallReceiver callReceiver;
  25.     @Override
  26.     public void onCreate() {
  27.         super.onCreate();
  28.         // Initialize anything needed for the service here
  30.         // Register the broadcast receiver for custom events
  31.         registerReceiver();
  33.         // Start listening for phone state changes
  34.         startListeningForPhoneState();
  35.     }
  37.     @Override
  38.     public int onStartCommand(Intent intent, int flags, int startId) {
  39.         // Start your background logic here
  40.         sendEventToReactNative("BACKGROUND_EVENT", "Event from background service");
  41.         return START_STICKY;
  42.     }
  44.     @Override
  45.     public IBinder onBind(Intent intent) {
  46.         return null;
  47.     }
  49.     @Override
  50.     public void onDestroy() {
  51.         super.onDestroy();
  52.         // Cleanup or release resources if needed
  54.         // Unregister the broadcast receiver and stop listening for phone state changes
  55.         unregisterReceiver();
  56.         stopListeningForPhoneState();
  57.     }
  59.     private void startListeningForPhoneState() {
  60.         telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
  61.         phoneStateListener = new CustomPhoneStateListener();
  62.         telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
  63.     }
  65.     private void stopListeningForPhoneState() {
  66.         if (telephonyManager != null && phoneStateListener != null) {
  67.             telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE);
  68.         }
  69.     }
  71.     private void registerReceiver() {
  72.         callReceiver = new CallReceiver();
  73.         IntentFilter intentFilter = new IntentFilter("your-custom-event");
  74.         registerReceiver(callReceiver, intentFilter);
  75.     }
  77.     private void unregisterReceiver() {
  78.         if (callReceiver != null) {
  79.             unregisterReceiver(callReceiver);
  80.         }
  81.     }
  83.     private void sendEventToReactNative(String event, String data) {
  84.         // Use your custom native module to send events to React Native
  85.         CallModule.sendEvent(event, data);
  86.     }
  88.     // Custom PhoneStateListener to handle call state changes
  89.     private class CustomPhoneStateListener extends PhoneStateListener {
  90.         @Override
  91.         public void onCallStateChanged(int state, String phoneNumber) {
  92.             switch (state) {
  93.                 case TelephonyManager.CALL_STATE_RINGING:
  94.                     // Handle incoming call
  95.                     sendEventToReactNative("INCOMING_CALL", phoneNumber);
  96.                     break;
  98.                 case TelephonyManager.CALL_STATE_OFFHOOK:
  99.                     // Handle outgoing call or call in progress
  100.                     sendEventToReactNative("OUTGOING_CALL", phoneNumber);
  101.                     break;
  103.                 case TelephonyManager.CALL_STATE_IDLE:
  104.                     // Handle call ended
  105.                     sendEventToReactNative("CALL_ENDED", phoneNumber);
  106.                     break;
  107.             }
  108.         }
  109.     }
  110. }

型
我怀疑这个问题与ReactApplicationContext在调用状态更改期间为null有关。当尝试显示浮动窗口时，如何确保ReactApplicationContext有效？
此外，是否有更好的方法来处理调用状态更改，并在与React Native集成的Android应用程序中显示浮动窗口？
任何帮助或指导都很感激。谢谢！

android

1条答案

按热度按时间
4jb9z9bj

4jb9z9bj1#

问题似乎与分配ReactApplicationContext和示例化CallModule的顺序有关。CallModule可能未正确初始化，导致CallReceiver调用sendEventToReactNative方法时ReactApplicationContext为null。
确保CallModule在使用前初始化是解决此问题的一种方法。在尝试使用它之前，您可以更改CallModule类以确保ReactApplicationContext已设置。

这是为您更新的CallModule：

  1. package com.arunkavale.test;
  3. import android.content.Context;
  4. import android.graphics.PixelFormat;
  5. import android.os.Build;
  6. import android.util.Log;
  7. import android.view.Gravity;
  8. import android.view.LayoutInflater;
  9. import android.view.View;
  10. import android.view.WindowManager;
  11. import android.widget.TextView;
  13. import com.facebook.react.bridge.ReactApplicationContext;
  14. import com.facebook.react.bridge.ReactContextBaseJavaModule;
  15. import com.facebook.react.bridge.ReactMethod;
  16. import com.facebook.react.modules.core.DeviceEventManagerModule;
  18. public class CallModule extends ReactContextBaseJavaModule {
  19.     private static ReactApplicationContext reactContext;
  20.     private static View overlayView;
  22.     public CallModule(ReactApplicationContext context) {
  23.         super(context);
  24.         reactContext = context;
  25.     }
  27.     @Override
  28.     public String getName() {
  29.         return "CallModule";
  30.     }
  32.     @ReactMethod
  33.     public void makeCall(String phoneNumber) {
  34.         // Implement code to make outgoing calls
  35.     }
  37.     static void initialize(ReactApplicationContext context) {
  38.         reactContext = context;
  39.     }
  41.     static void sendEvent(String eventName, String phoneNumber) {
  42.         Log.d("CallModule", "sendEvent " + eventName + " phoneNumber " + phoneNumber);
  44.         // Ensure that the ReactApplicationContext is not null
  45.         if (reactContext == null) {
  46.             Log.e("CallModule", "ReactApplicationContext is null. CallModule may not have been properly initialized.");
  47.             return;
  48.         }
  50.         showFloatingWindow(phoneNumber);
  51.         reactContext
  52.                 .getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
  53.                 .emit(eventName, phoneNumber);
  54.     }
  56.     static void showFloatingWindow(String phoneNumber) {
  57.         // Get the WindowManager service
  58.         WindowManager windowManager = (WindowManager) reactContext.getSystemService(Context.WINDOW_SERVICE);
  60.         // Inflate the layout for the floating window
  61.         LayoutInflater inflater = (LayoutInflater) reactContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  62.         overlayView = inflater.inflate(R.layout.floating_window_layout, null);
  64.         // Add your custom logic to update the content of the floating window
  65.         TextView textView = overlayView.findViewById(R.id.textView);
  66.         textView.setText("Calling " + phoneNumber);
  68.         // Set window parameters
  69.         WindowManager.LayoutParams params;
  70.         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
  71.             params = new WindowManager.LayoutParams(
  72.                     WindowManager.LayoutParams.WRAP_CONTENT,
  73.                     WindowManager.LayoutParams.WRAP_CONTENT,
  74.                     WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
  75.                     WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
  76.                     PixelFormat.TRANSLUCENT);
  77.         } else {
  78.             params = new WindowManager.LayoutParams(
  79.                     WindowManager.LayoutParams.WRAP_CONTENT,
  80.                     WindowManager.LayoutParams.WRAP_CONTENT,
  81.                     WindowManager.LayoutParams.TYPE_PHONE,
  82.                     WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
  83.                     PixelFormat.TRANSLUCENT);
  84.         }
  86.         params.gravity = Gravity.TOP | Gravity.START;
  87.         params.x = 0;
  88.         params.y = 100;
  90.         // Add the view to the window manager
  91.         windowManager.addView(overlayView, params);
  92.     }
  93. }

字符串
这是调用CallModule的时候了。在调用sendEvent之前，请确保您的应用程序使用有效的ReactApplicationContext调用initialize（reactContext）。您可能希望在适当的应用程序入口点或主应用程序类的onCreate方法中完成此操作。

  1. @Override
  2. public void onCreate() {
  3.     super.onCreate();
  4.     // Other initialization code
  5.     CallModule.initialize(new ReactApplicationContext(this));
  6. }

型

展开查看全部
赞(0）分享  回复(0）举报  2024-01-04
我来回答

相关问题

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新问答

    更多
    • 蜀ICP备13028337号-1 大数据知识库 https://www.saoniuhuo.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com