Java 当我单击添加时Android应用程序崩溃
我正在使用Firebase数据库和Android Studio。当我运行应用程序并单击添加食物按钮时，应用程序崩溃，数据库中没有添加任何内容。如果我没有输入食物名称，错误消息将按预期显示 这是我的密码：Java 当我单击添加时Android应用程序崩溃,java,android,firebase,firebase-realtime-database,Java,Android,Firebase,Firebase Realtime Database,我正在使用Firebase数据库和Android Studio。当我运行应用程序并单击添加食物按钮时，应用程序崩溃，数据库中没有添加任何内容。如果我没有输入食物名称，错误消息将按预期显示 这是我的密码： public class addFood extends AppCompatActivity { //source : https://www.youtube.com/watch?v=EM2x33g4syY&t=415s EditText editTextName; EditText
public class addFood extends AppCompatActivity {
//source : https://www.youtube.com/watch?v=EM2x33g4syY&t=415s
EditText editTextName;
EditText editTextBestBefore;
Button buttonAddFood;
Spinner spinnerCategory;
DatabaseReference foodDatabase;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_food);
// source : https://www.youtube.com/watch?v=EM2x33g4syY&t=415s
foodDatabase = FirebaseDatabase.getInstance().getReference("food");
editTextName =(EditText)(findViewById(R.id.editTextName));
editTextBestBefore =(EditText)(findViewById(R.id.editTextBestBefore));
buttonAddFood =(Button) (findViewById(R.id.buttonAddFood));
spinnerCategory =(Spinner) (findViewById(R.id.spinnerCategory));
buttonAddFood.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
addFood();
}
});
}
private void addFood()
//source : https://www.youtube.com/watch?v=EM2x33g4syY&t=415s
{
String foodName = editTextName.getText().toString().trim();
String bestBefore = editTextBestBefore.getText().toString().trim();
String category = spinnerCategory.getSelectedItem().toString();
if (!TextUtils.isEmpty(foodName)){
String id = foodDatabase.push().getKey();
food food = new food(id,foodName, bestBefore, category);
foodDatabase.child(id).setValue(food);
Toast.makeText(this, "food added!", Toast.LENGTH_LONG).show();
}
else{
Toast.makeText(this, "Please enter a food name", Toast.LENGTH_LONG).show();
}
}
[ 01-16 15:29:09.339 27506:27506 W/ ]
Unable to open '/system/framework/prcui-config.jar': No such file or directory
01-16 15:29:11.535 17286-27791/？D/FA-SVC:get package replaced intent:com.virtual.a2018fridge您没有添加用于构建数据库的代码 比如像这样的事情
mRootRef.child("Chat").child(mCurrentUserId).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if(!dataSnapshot.hasChild(mChatUser)){
Map chatAddMap = new HashMap();
chatAddMap.put("seen", false);
chatAddMap.put("timestamp", ServerValue.TIMESTAMP);
Map chatUserMap = new HashMap();
chatUserMap.put("Chat/" + mCurrentUserId + "/" + mChatUser, chatAddMap);
chatUserMap.put("Chat/" + mChatUser + "/" + mCurrentUserId, chatAddMap);
mRootRef.updateChildren(chatUserMap, new DatabaseReference.CompletionListener() {
@Override
public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
if(databaseError != null){
Log.d("CHAT_LOG", databaseError.getMessage().toString());
}
}
});
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
mChatSendBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sendMessage();
}
});
}
您必须根据您的要求构建数据库的位置请共享日志张贴堆栈跟踪。错误是什么？您看到日志了吗？这几乎是不可读的。尝试将其重新格式化一点在代码按钮addFood.setOnClickListener（new View.OnClickListener（）{@Override public void onClick（View v）{addFood（）；}}}之前添加此项并根据您的要求更改其值