我尝试使用Firebase平台开发包含通知的简单应用程序（名为Noti）。我需要使用保存在我服务器上的PHP脚本将令牌保存到数据库中。问题是我按下按钮后收到消息package com.example.jaroslavvystavel.noti;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.google.firebase.iid.FirebaseInstanceId;
import java.io.IOException;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnShowToken = (Button)findViewById(R.id.button_show_token);
btnShowToken.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Get the token
String token = FirebaseInstanceId.getInstance().getToken();
Log.d(TAG, "Token: " + token);
Toast.makeText(MainActivity.this, token, Toast.LENGTH_SHORT).show();
registerToken(token);
}
});
}
private void registerToken(String token) {
OkHttpClient client = new OkHttpClient();
RequestBody body = new FormBody.Builder()
.add("Token",token)
.build();
Request request = new Request.Builder()
.url("http://www.stud.fit.vutbr.cz/~xvose02/testuji.php")
.post(body)
.build();
try {
client.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
}
}
。
registerToken我受到Youtube tutorial的启发，一切正常。我只是稍微修改了作者的代码，每次用户按下按钮时调用 04-24 05:42:58.601 28949-28949/com.example.jaroslavvystavel.noti D/MainActivity: Token: c7J9CHxblE8:APA91bEnZA6zU5nnzKVba19G5ViznKy5jR5-_arjavZWQcpLXsK4M5VOTxc50g1ANFSmFPJ-ADRXfhX-aDa3ZsRwkEhyrIFQXEJX5x3OcQDt7ejNMfF3Q8qeTSsmWbGB4fFxIe1QR0gc
04-24 05:42:58.701 28949-28949/com.example.jaroslavvystavel.noti D/AndroidRuntime: Shutting down VM
04-24 05:42:58.701 28949-28949/com.example.jaroslavvystavel.noti W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x417a1930)
04-24 05:42:58.741 28949-28949/com.example.jaroslavvystavel.noti E/AndroidRuntime: FATAL EXCEPTION: main
android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1128)
at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
at java.net.InetAddress.getAllByName(InetAddress.java:214)
at okhttp3.Dns$1.lookup(Dns.java:39)
at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:170)
at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:136)
at okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:81)
at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:171)
at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121)
at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185)
at okhttp3.RealCall.execute(RealCall.java:69)
at com.example.jaroslavvystavel.noti.MainActivity.registerToken(MainActivity.java:57)
at com.example.jaroslavvystavel.noti.MainActivity.access$000(MainActivity.java:20)
at com.example.jaroslavvystavel.noti.MainActivity$1.onClick(MainActivity.java:37)
at android.view.View.performClick(View.java:4439)
at android.widget.Button.performClick(Button.java:139)
at android.view.View$PerformClick.run(View.java:18395)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5319)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)
方法。
Android Monitor日志（从按下按钮的那一刻起）：
class updateDb extends AsyncTask<OkHttpClient, RequestBody, Request> {
private Exception exception;
@Override
protected Request doInBackground(String... params) {
try {
OkHttpClient client = new OkHttpClient();
RequestBody body = new FormBody.Builder()
.add("Token",token)
.build();
Request request = new Request.Builder()
.url("http://www.stud.fit.vutbr.cz/~xvose02/testuji.php")
.post(body)
.build();
try {
client.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception e) {
this.exception = e;
}
return null;
}
}
AsyncTask类：
{{1}}
不确定方法的参数......
答案 0 :(得分：1)
添加答案以提供示例代码
请求看起来很好。其他参数实际上并不是必需的。以下是我认为代码应该（简化）的方式。
private void registerToken(final String token) {
new updateDb().execute(token);
}
private class updateDb extends AsyncTask<String, Void, Void> {
@Override
protected Void doInBackground(String... token) {
try {
OkHttpClient client = new OkHttpClient();
RequestBody body = new FormBody.Builder()
.add("Token", token[0])
.build();
Request request = new Request.Builder()
.url("http://www.stud.fit.vutbr.cz/~xvose02/testuji.php")
.post(body)
.build();
client.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}