Java 从设备到设备的Android Firebase云消息传递
我正在尝试发送firebase设备到设备推送通知,因此我有如下代码Java 从设备到设备的Android Firebase云消息传递,java,android,firebase-cloud-messaging,Java,Android,Firebase Cloud Messaging,我正在尝试发送firebase设备到设备推送通知,因此我有如下代码 private void sendNotification(final String token) { new AsyncTask<Void,Void,Void>(){ @Override protected Void doInBackground(Void... voids) { try { OkHttpClient
private void sendNotification(final String token) {
new AsyncTask<Void,Void,Void>(){
@Override
protected Void doInBackground(Void... voids) {
try {
OkHttpClient client=new OkHttpClient();
JSONObject json=new JSONObject();
JSONObject dataJson=new JSONObject();
dataJson.put("body","Hello, I am body");
dataJson.put("title","I am title");
json.put("notification",dataJson);
json.put("to",token);
RequestBody body=RequestBody.create(JSON,json.toString());
Request request=new Request.Builder()
.header("Authorization","key="+LEGACY_SERVER_KEY)
.url("https://fcm.googleapis.com/fcm/send")
.post(body)
.build();
Response response=client.newCall(request).execute();
String finalResponse=response.body().string();
//Toast.makeText(MainActivity.this, finalResponse, Toast.LENGTH_SHORT).show();
}catch (Exception e){
Toast.makeText(MainActivity.this, "Exception occured", Toast.LENGTH_SHORT).show();
}
return null;
}
}.execute();
}
private void sendNotification(最终字符串标记){
新建异步任务(){
@凌驾
受保护的空位背景(空位…空位){
试一试{
OkHttpClient=新的OkHttpClient();
JSONObject json=新的JSONObject();
JSONObject dataJson=新的JSONObject();
put(“body”,“你好,我是body”);
put(“标题”,“我是标题”);
put(“通知”,dataJson);
put(“to”,token);
RequestBody=RequestBody.create(JSON,JSON.toString());
Request Request=newrequest.Builder()
.header(“授权”、“密钥=“+LEGACY\u SERVER\u密钥”)
.url(“https://fcm.googleapis.com/fcm/send")
.职位(机构)
.build();
Response=client.newCall(request.execute();
String finalResponse=response.body().String();
//Toast.makeText(MainActivity.this,finalResponse,Toast.LENGTH_SHORT).show();
}捕获(例外e){
Toast.makeText(MainActivity.this,“发生异常”,Toast.LENGTH_SHORT.show();
}
返回null;
}
}.execute();
}
这里的问题是通知没有发送到其他设备。但当我取消对Toast(try块的最后一行)的注释时,通知将成功发送,并立即显示应用程序停止工作。有人请帮忙
当我取消注释Toast(try块的最后一行)时,将发送通知,但它表示不幸的是,应用程序已停止。logcat是:
01-23 07:17:11.907 4694-4731/bhavana.apps.saveme E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
Process: bhavana.apps.saveme, PID: 4694
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:353)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
at java.util.concurrent.FutureTask.run(FutureTask.java:271)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)
Caused by: java.lang.RuntimeException: Can't toast on a thread that has not called Looper.prepare()
at android.widget.Toast$TN.<init>(Toast.java:390)
at android.widget.Toast.<init>(Toast.java:114)
at android.widget.Toast.makeText(Toast.java:277)
at android.widget.Toast.makeText(Toast.java:267)
at bhavana.apps.saveme.MainActivity$6.doInBackground(MainActivity.java:199)
at bhavana.apps.saveme.MainActivity$6.doInBackground(MainActivity.java:176)
at android.os.AsyncTask$2.call(AsyncTask.java:333)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:764)
01-23 07:17:11.907 4694-4731/bhavana.apps.saveme E/AndroidRuntime:FATAL EXCEPTION:AsyncTask#1
流程:bhavana.apps.saveme,PID:4694
java.lang.RuntimeException:执行doInBackground()时出错
在android.os.AsyncTask$3.done(AsyncTask.java:353)
位于java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
位于java.util.concurrent.FutureTask.setException(FutureTask.java:252)
位于java.util.concurrent.FutureTask.run(FutureTask.java:271)
在android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
位于java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
位于java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
运行(Thread.java:764)
原因:java.lang.RuntimeException:无法在未调用Looper.prepare()的线程上toast
在android.widget.Toast$TN.(Toast.java:390)
在android.widget.Toast.(Toast.java:114)
位于android.widget.Toast.makeText(Toast.java:277)
位于android.widget.Toast.makeText(Toast.java:267)
位于bhavana.apps.saveme.MainActivity$6.doInBackground(MainActivity.java:199)
位于bhavana.apps.saveme.MainActivity$6.doInBackground(MainActivity.java:176)
位于android.os.AsyncTask$2.call(AsyncTask.java:333)
在java.util.concurrent.FutureTask.run(FutureTask.java:266)处
在android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
位于java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
位于java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
运行(Thread.java:764)
您只能在UI线程中显示祝酒词。删除此行或将其移动到“
onPostExecute”
:
Toast.makeText(MainActivity.this, "Exception occured", Toast.LENGTH_SHORT).show();
Toast.makeText()
需要在UI线程中执行。尝试将其替换为:
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "Exception occured", Toast.LENGTH_SHORT).show();
}
});
如果只需要调试,也可以使用日志:
android.util.Log.i("debug", "success msg: " + finalResponse);
您可以通过覆盖onPostExecute()
这假设onPostExecute()
returnBoolean
,因此:
@Override
protected Boolean doInBackground(Void... params) {
......
// return true on success
if (success) {
return true;
}
return false;
}
类需要这样定义:
new AsyncTask<Void, Void, Boolean>(){
newasynctask(){
原因:java.lang.RuntimeException:无法在
尚未调用Looper.prepare()
你应该使用
在UI线程上运行指定的操作。如果当前线程为
UI线程,则立即执行该操作
线程不是UI线程,操作被发布到事件队列
用户界面线程的
new AsyncTask<Void, Void, Boolean>(){
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(MainActivity.this, "Exception occured", Toast.LENGTH_SHORT).show();
}
});