应用程序不断崩溃导致广播接收器

Question

有人能帮我调试代码的哪一部分是它不断崩溃的原因吗？我一直在努力找出哪一部分是错误的，我在网上得到了代码，并自己应用了它，但我在这一部分遇到了麻烦，它一直说应用程序是我创建了不同的函数来找出哪个部分是错误的，谢谢。

在我的日志中，它说：由以下原因引起：java.lang.NullPointerException：试图在null对象引用上调用虚拟方法"java.lang.String java.lang.SString.intern((">

主要活动

import androidx.appcompat.app.AppCompatActivity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
private TextView tv_time;
private TextView tv_amount;
private ImageView iv_status_01;
private ImageView iv_status_02;
private ImageView iv_status_03;
private ImageView iv_status_04;
private ImageView iv_status_05;
private ImageView iv_status_06;
private ImageView iv_complete;

private Intent serviceInent = null;

public static String status1;
public static String status2;
public static String status3;
public static String status4;
public static String status5;
public static String status6;
private IntentFilter intentFilter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
intentFilter = new IntentFilter();
intentFilter.addAction(status1);
intentFilter.addAction(status2);
intentFilter.addAction(status3);
intentFilter.addAction(status4);
intentFilter.addAction(status5);
intentFilter.addAction(status6);
init();
}
private void init(){
tv_amount = findViewById(R.id.tv_amount);
tv_time = findViewById(R.id.tv_time);
Date date = new Date();
Locale philippineLocale = new Locale.Builder().setLanguage("en").setRegion("PH").build();
tv_time.setText(getDate(date, philippineLocale));
tv_amount.setText("Total Amount :n500.00");
serviceInent = new Intent(this, DeliveryService.class);
startService(new Intent(this, DeliveryService.class));
}
private String getDate(Date date, Locale locale) {
DateFormat formatter = new SimpleDateFormat("EEEE nMMMM dd, yyyy", locale);
return formatter.format(date);
}
@Override
public void onResume() {
super.onResume();
registerReceiver(mReceiver, intentFilter);
}
private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(status1)) {
iv_status_01.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status2)) {
iv_status_02.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status3)) {
iv_status_03.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status4)) {
iv_status_04.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status5)) {
iv_status_05.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status5)) {
iv_status_06.setImageResource(R.drawable.box_check);
}
}
};
@Override
protected void onPause() {
unregisterReceiver(mReceiver);
super.onPause();
}
}

交付服务：

import android.annotation.TargetApi;
import android.app.Service;
import android.content.Intent;
import android.os.Build;
import android.os.IBinder;
import android.util.Log;
public class DeliveryService extends Service {
private String LOG_TAG = null;

@Override
public void onCreate() {
super.onCreate();
LOG_TAG = this.getClass().getSimpleName();
Log.i(LOG_TAG, "In onCreate");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i(LOG_TAG, "In onStartCommand");
new Thread(new Runnable() {
public void run() {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Intent broadcastIntent = new Intent();
broadcastIntent.setAction(MainActivity.status1);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status2);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status3);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status4);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status5);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status6);
sendBroadcast(broadcastIntent);
}
}).start();
return START_REDELIVER_INTENT;
}
@Override
public IBinder onBind(Intent intent) {
Log.i(LOG_TAG, "In onBind");
return null;
}
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
@Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
Log.i(LOG_TAG, "In onTaskRemoved");
}
public void onDestroy() {
super.onDestroy();
Log.i(LOG_TAG, "In onDestroy");
}
}

谢谢。

Answer 1

您应该初始化用作Action的字符串(如status1(；否则，将抛出NullProinterException。