android - passing values to another activity

Question

I am trying to pass value "0000002" in string format to next activity like below:

Intent pass = new Intent(this, SecondActivity.class);
pass.putExtras("EmpID", "0000002");

In second activity

Bundle info = getIntent().getExtras();
System.out.println("Test " + info.getString("EmpID")); // this line printing "null" value instead of "0000002". 

I am able to pass and fetch the other strings successfully. I am not able to fetch the EmpID.

Please help me.

Answer 1

ここにサンプルがあります

最初の活動から

Bundle localBundle = new Bundle();
localBundle.putString("Loan Amount", editText1.getText().toString());
localBundle.putString("Loan Tenture", editText2.getText().toString());
localBundle.putString("Interest Rate", editText3.getText().toString());
Intent localIntent = new Intent(this, Activity2.class);
localIntent.putExtras(localBundle);
startActivity(localIntent);

そしてActivity2で

String string1 = getIntent().getStringExtra("Loan Amount");
String string2 = getIntent().getStringExtra("Loan Tenture");
String string3 = getIntent().getStringExtra("Interest Rate");

あなたの場合、次のように使用できます

Bundle localBundle = new Bundle();
localBundle.putString("EmpID", "0000002");
Intent pass = new Intent(this, SecondActivity.class);
pass.putExtras(localBundle);
startActivity(pass);

SecondActivity では、次のように EmpId を取得できます

String empId = getIntent().getStringExtra("EmpID");

-----------------別の方法-----------------

Intent pass = new Intent(this, SecondActivity.class);
pass.putExtra("EmpID", "0000002");
startActivity(pass);

2 番目のアクティビティでは、次のように EmpId を取得できます

Bundle bundle = getIntent().getExtras();
String empId = bundle.getString("EmpID"); 

Answer 2

これを使って

Intent pass = new Intent(this, SecondActivity.class);
pass.putExtra("EmpID", "0000002");
startActivity(pass);

2回目の活動で

Bundle info = getIntent().getExtras();
System.out.println("Test " + info.getString("EmpID")); 

Answer 3

書いpass.putExtra("EmpID", "0000002");てはいけませんExtras

Answer 4

これを使ってみてください: 値を渡すとき:

Intent pass = new Intent(this, SecondActivity.class);
pass.putExtra("EmpID", "0000002");

値を取得するには:

System.out.println("Test " + getIntent().getStringExtra("EmpID"));

Answer 5

//Activity A
Intent pass = new Intent(this, SecondActivity.class);
pass.putExtra("EmpID", "0000002");

//Activity B
Intent intent = getIntent();
String EmpID = intent.getStringExtra("EmpID");
System.out.println("Test " + EmpID);