Android app works on phone but not on AVD

Question

When I debug the app on my android phone I get absolutely no errors what so ever, but on AVD I get a NullPointerException() right from the get-go. My Android Device is running on Lollipop (5.1.1) at 22 API, my AVD is running on Pie (9.0) at 28 API. I have set the minimum SDK to 21 and the compile SDK to 28 in my gradle.

This is the error:

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.something.something, PID: 7328 java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.CharSequence android.widget.TextView.getText()' on a null object reference at com.something.something.FirstActivity$1.onEditorAction(FirstActivity.java:140)

Which points to line 140 of the FirstActivity:

String avatarInput = playerAvatar.getText().toString();

which is referencing an XML attribute and assigning its text value to a String. Now I am sure that the XML has in fact a text value for 2 reasons:

1) I have hard-coded that text value myself.

2) line 140 does not return null on my Android Device.

The problem therefore must be from the AVD. I have tried other virtual devices but none work

public class FirstActivity extends AppCompatActivity implements View.OnClickListener {

private static final String TAG = "FirstActivity";

private static final List namesArray = new ArrayList<>();

static final String KEY_NAME = "name";
static final String KEY_AVATAR = "avatar";
static final String KEY_ICON = "icon";

FirebaseFirestore db = FirebaseFirestore.getInstance();

RelativeLayout firstActLayout;

TextView numberOfPlayers;
EditText addPlayer;
TextView doneButton;
ImageView settingsButton;
TextView sunOrMoon;

TextView playerAvatar;
TextView characterImage;


private static int playerSum = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.first_activity);

    firstActLayout = findViewById(R.id.first_act_layout);
    numberOfPlayers = findViewById(R.id.number_of_players);
    addPlayer = findViewById(R.id.add_player);
    doneButton = findViewById(R.id.done_button);
    settingsButton = findViewById(R.id.settings_button);
    sunOrMoon = findViewById(R.id.sun_or_moon);

    addPlayer.setOnClickListener(this);
    doneButton.setOnClickListener(this);
    settingsButton.setOnClickListener(this);
    numberOfPlayers.setOnClickListener(this);
    sunOrMoon.setOnClickListener(this);

    playerAvatar = findViewById(R.id.avatar);
    characterImage = findViewById(R.id.icon);

}

@Override
protected void onResume(){
    super.onResume();

}

@Override
public void onClick(View v){
    switch (v.getId()){
        case R.id.add_player:
            addPlayers();
            break;
        case R.id.done_button:
            onClickConditions();
            break;
        case R.id.settings_button:
            break;
        case R.id.number_of_players:
            Toast.makeText(this, "Total number of players", Toast.LENGTH_SHORT).show();
            break;
        case R.id.sun_or_moon:
            Toast.makeText(this, "DAY", Toast.LENGTH_SHORT).show();
            break;
        default:
            Toast.makeText(this, "DAY", Toast.LENGTH_SHORT).show();
            break;
    }
}

public void addPlayers (){
    addPlayer.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {

            if (actionId == EditorInfo.IME_ACTION_NEXT) {

                namesArray.add(addPlayer.getText().toString());
                String nameInput = addPlayer.getText().toString();
                String avatarInput = playerAvatar.getText().toString();
                String characterInput = characterImage.getText().toString();
                addPlayer.getText().clear();
                playerSum++;
                numberOfPlayers.setText("");
                numberOfPlayers.setText(String.valueOf(playerSum));

                Map  player = new HashMap<>();
                player.put(KEY_NAME, nameInput);
                player.put(KEY_AVATAR, avatarInput);
                player.put(KEY_ICON, characterInput);

                db.collection("Players")       .document("Player_".concat(String.valueOf(playerSum)))
                        .set(player)
                        .addOnSuccessListener(new OnSuccessListener() {
                            @Override
                            public void onSuccess(Void aVoid) {
                                Toast.makeText(FirstActivity.this,"Name Saved", Toast.LENGTH_SHORT)
                                        .show();
                            }
                        })
                        .addOnFailureListener(new OnFailureListener() {
                            @Override
                            public void onFailure(@NonNull Exception e) {
                                Toast.makeText(FirstActivity.this,"Error!", Toast.LENGTH_SHORT)
                                        .show();
                                Log.d(TAG, e.toString());
                            }
                        });
            }
            return false;
        }
    });
}

public void onClickConditions(){
    if (playerSum >= 5){
        Intent intent1 = new Intent(this, SecondActivity.class);
        startActivity(intent1);
        return;
    }
    Toast.makeText(this, "Minimum of 5 players are needed", Toast.LENGTH_LONG)
            .show();
}

}

The reason why I have to use an AVD is because my app uses the camera and my phone's camera is busted so I have to run my app on the AVD. I have already set my AVD camera to my webcam, but I have to move passed the error on line 140 before I can lunch the camera on AVD.

Android app works on phone but not on AVD

Answers (1)

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