Я новичок в Android Studio. когда я запускаю это для одного действия, оно работает нормально, но когда у меня есть несколько действий, оно принудительно закрывается.
Ошибка
<em> 02-12 00:18:42.578 5092-5092/com.example.driveassist E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.driveassist, PID: 5092
java.lang.RuntimeException: Error receiving broadcast Intent { act=android.provider.Telephony.SMS_RECEIVED flg=0x8000010 (has extras) } in com.example.driveassist.firstPage$1@30b6fb57
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:876)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at com.example.driveassist.firstPage$1.onReceive(firstPage.java:77)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
</em> мои коды действий
import android.annotation.SuppressLint;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.speech.tts.TextToSpeech;
import android.telephony.SmsMessage;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.TextView;
import android.widget.ToggleButton;
public class firstPage extends AppCompatActivity {
private Button button,btbutton,acbutton;
private final int CHECK_CODE = 0x1;
private final int LONG_DURATION = 2000;
private final int SHORT_DURATION = 1200;
private Speaker speaker;
private ToggleButton toggle;
private CompoundButton.OnCheckedChangeListener toggleListener;
private TextView smsText;
private TextView smsSender;
private BroadcastReceiver smsReceiver;
private String address;
private void checkTTS(){
Intent check = new Intent();
check.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(check, CHECK_CODE);
}
@SuppressLint("MissingSuperCall")
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(requestCode == CHECK_CODE){
if(resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS){
speaker = new Speaker(this);
}else {
Intent install = new Intent();
install.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
startActivity(install);
}
}
}
private void initializeSMSReceiver(){
smsReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
Bundle bundle = intent.getExtras();
if(bundle!=null){
Object[] pdus = (Object[])bundle.get("pdus");
for(int i=0;i<pdus.length;i++){
byte[] pdu = (byte[])pdus[i];
SmsMessage message = SmsMessage.createFromPdu((byte[]) pdus[0]);
String text = message.getDisplayMessageBody();
address = message.getOriginatingAddress();
String sender = getContactName(message.getOriginatingAddress());
speaker.pause(LONG_DURATION);
speaker.speak("You have a new message from" + sender + "!");
speaker.pause(SHORT_DURATION);
speaker.speak(text);
smsSender.setText("Message from " + sender);
smsText.setText(text);
}
}
}
};
}
private String getContactName(String phone){
Uri uri = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phone));
String projection[] = new String[]{ContactsContract.Data.DISPLAY_NAME};
Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
if(cursor.moveToFirst()){
return cursor.getString(0);
}else {
return address;
}
}
private void registerSMSReceiver() {
IntentFilter intentFilter = new IntentFilter("android.provider.Telephony.SMS_RECEIVED");
registerReceiver(smsReceiver, intentFilter);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first_page);
toggle = (ToggleButton)findViewById(R.id.speechToggle);
//smsText = (TextView)findViewById(R.id.sms_text);
smsSender = (TextView)findViewById(R.id.senderView);
toggleListener = new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton view, boolean isChecked) {
if(isChecked){
speaker.allow(true);
speaker.speak(getString(R.string.start_speaking));
}else{
speaker.speak(getString(R.string.stop_speaking));
speaker.allow(false);
}
}
};
toggle.setOnCheckedChangeListener(toggleListener);
checkTTS();
initializeSMSReceiver();
registerSMSReceiver();
button =(Button) findViewById(R.id.settingsButton);
button.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View V) {
openActivity3();
}
});
btbutton =(Button) findViewById(R.id.btsettingsButton);
btbutton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View V) {
btActivity();
}
});
acbutton = (Button) findViewById(R.id.acceptButton);
acbutton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View V) {
readActivity();
}
});
}
public void openActivity3() {
Intent intent = new Intent(this,editMessage.class);
startActivity(intent);
}
public void btActivity() {
Intent intent1 = new Intent(this,btConnectivity.class);
startActivity(intent1);
}
public void readActivity() {
Intent intent2 = new Intent(this,readMessage.class);
startActivity(intent2);
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(smsReceiver);
speaker.destroy();
}
}