[英]Problems setting TextView value to a String got from Intent
所以...我的问题是,当我尝试发送Intent putExtra时,将其放入新类中,然后将其放入TextView中,它将返回null ...
这是我的代码:
final String phonenum = text.getText().toString();
Intent i = new Intent(sms_verification.this, sms_verification_two.class);
i.putExtra("num", num);
i.putExtra("phonenum" , phonenum);
startActivity(i);
然后是“ sms_verification_two”
Button next;
EditText code;
TextView phone;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sms_verification2);
next = (Button)findViewById(R.id.button);
code = (EditText)findViewById(R.id.editText2);
phone = (TextView)findViewById(R.id.textView);
String phonenum = getIntent().getStringExtra("phonenum");
String num = getIntent().getStringExtra("num");
phone.setText(phonenum);
确保您放入意图的数据不为空。 代码本身对我来说很好。
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button goToNextActivity=(Button) findViewById(R.id.bSendID);
final EditText etNum=(EditText) findViewById(R.id.etNumID);
final EditText etPhoneum=(EditText) findViewById(R.id.etPhoneumID);
goToNextActivity.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String textFromEtNum=etNum.getText().toString();
String textFromEtPhoneum=etPhoneum.getText().toString();
Intent i = new Intent(getApplicationContext(), secondActivity.class);
i.putExtra("num", textFromEtNum);
i.putExtra("phonenum" , textFromEtPhoneum);
startActivity(i);
}
});
}
}
第二项活动:
public class secondActivity extends AppCompatActivity {
Button next;
EditText code;
TextView phone;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
next = (Button)findViewById(R.id.button);
code = (EditText)findViewById(R.id.editText2);
phone = (TextView)findViewById(R.id.textView);
String phonenum = getIntent().getStringExtra("phonenum");
String num = getIntent().getStringExtra("num");
phone.setText(phonenum + " " + num);
}
}
第一次活动
**if your text variable TextView or EditText then write**
String phonenum = text.getText().toString();
Intent i = new Intent(sms_verification.this, sms_verification_two.class);
i.putExtra("nums", num);
i.putExtra("phonenums" , phonenum);
startActivity(i);
第二次活动
public class sms_verification_two extends AppCompatActivity {
Button next;
EditText code;
TextView phone;
String phonenumss = "",numss = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
next = (Button)findViewById(R.id.button);
code = (EditText)findViewById(R.id.editText2);
phone = (TextView)findViewById(R.id.textView);
if(getIntent().getStringExtra("phonenums") != null){
phonenumss = getIntent().getStringExtra("phonenums");
}
if(getIntent().getStringExtra("nums") != null){
numss = getIntent().getStringExtra("nums");
}
phone.setText(" " +phonenumss + " " + numss);
}}
尝试在您的sms_verification_two活动上使用此方法
String phonenum = "";
String num = "";
Bundle extras = getIntent().getExtras();
if (extras != null) {
phonenum = extras.getString("phonenum");
num = extras.getString("num");
}
phone.setText(phonenum + num);
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