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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的服务器上的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Noti has stopped。调用registerToken时应用程序停止
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();
}
}
}
我从这个Youtube tutorial的灵感，其中一切工作正常。每次用户按下按钮时，我稍微修改了作者的代码以调用registerToken方法。
的Android监视器日志（从按下按钮的那一刻）：
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)
的AsyncTask类：
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;
}
}
不知道关于方法的参数...
嗨。你还可以发布错误日志吗？ –
@AL。你好。你能告诉我在哪里可以找到他们？对不起，我完全是Android开发的初学者。 – user7303261
嗨。当然。日志应该在Android监视器部分中可见。见[这里]（https://developer.android.com/studio/profile/android-monitor.html）。 –