我使用putExtra()提供数据。但数据没有到达另一页。
我认为数据检索会有一些问题。
这是 putExtra代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Bundle b = getIntent().getExtras();
if (b != null && b.containsKey("email")) {
email = getIntent().getExtras().getString("email");
}
if (b != null && b.containsKey("password")) {
password = getIntent().getExtras().getString("password");
}
Log.i("Email",email+"VV");
Log.i("Password",password+"AA");
/*email=getIntent().getExtras().getString("email");
password=getIntent().getExtras().getString("password");*/
// Log.i("Email",email+"VV");
// Log.i("Password",password+"AA");
//jsonen();
Imagebtn_start = (ImageButton) findViewById(R.id.image_btnstart);
conDetector = new ConnectionDetector(getApplicationContext());
Imagebtn_start.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
isInternetPresent = conDetector.isConnectingToInternet();
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
.detectDiskReads().detectDiskWrites().detectNetwork() // StrictMode is most commonly used to catch accidental disk or network access on the application's main thread
.penaltyLog().build());
ArrayList<NameValuePair> pp = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("email",email));
postParameters.add(new BasicNameValuePair("password",password));
String teamresponse = null;
JSONObject json=null;
String userID = null;
JSONObject json_data = null;
String teamStatus ="";
try {
teamresponse=CustomHttpClient.executeHttpPost("http://10.0.2.2/football365/login.php", postParameters);
json = new JSONObject(teamresponse);
userID=json.getString("userID");
}
catch (Exception e) {
e.printStackTrace();
}
Log.i("USERID", userID+"");
String result = teamresponse.toString();
JSONObject jsonobj = null;
try{
jsonobj = new JSONObject (result);
teamStatus=jsonobj.getString("teamStatus");
}
catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
}
if (isInternetPresent){
if(isLogIn()){
if(teamStatus.equals("1")){
Log.i("Check it",isLogIn()+"");
Intent goLogin=new Intent(MainActivity.this,Team.class);
startActivity(goLogin);
}
else if(teamStatus.equals("0"))
{
Log.i("Check it no team",isLogIn()+"");
Intent goLogin=new Intent(MainActivity.this,NoTeam.class);
startActivity(goLogin);
}
}
else
{
Log.i("Check it in else",isLogIn()+"");
Intent goLogin=new Intent(MainActivity.this,Login.class);
startActivity(goLogin);
}
}
else{
showAlertDialog(MainActivity.this, "No Internet Connection",
"You don't have internet connection.", false);
}
}
});
}
错误。
12-10 16:23:43.762: E/AndroidRuntime(1261): FATAL EXCEPTION: main
12-10 16:23:43.762: E/AndroidRuntime(1261): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.totallyfinish/com.example.totallyfinish.MainActivity}: java.lang.NullPointerException
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.app.ActivityThread.access$600(ActivityThread.java:122)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.os.Handler.dispatchMessage(Handler.java:99)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.os.Looper.loop(Looper.java:137)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.app.ActivityThread.main(ActivityThread.java:4340)
12-10 16:23:43.762: E/AndroidRuntime(1261): at java.lang.reflect.Method.invokeNative(Native Method)
12-10 16:23:43.762: E/AndroidRuntime(1261): at java.lang.reflect.Method.invoke(Method.java:511)
12-10 16:23:43.762: E/AndroidRuntime(1261): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-10 16:23:43.762: E/AndroidRuntime(1261): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
12-10 16:23:43.762: E/AndroidRuntime(1261): at dalvik.system.NativeStart.main(Native Method)
12-10 16:23:43.762: E/AndroidRuntime(1261): Caused by: java.lang.NullPointerException
12-10 16:23:43.762: E/AndroidRuntime(1261): at com.example.totallyfinish.MainActivity.onCreate(MainActivity.java:57)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.app.Activity.performCreate(Activity.java:4465)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
12-10 16:23:43.762: E/AndroidRuntime(1261): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
12-10 16:23:43.762: E/AndroidRuntime(1261): ... 11 more
我放了创建方法...... Plz，检查。我改变了我的代码，错误消失了。现在，我正在检查...... :)
这是putExtra方法。我知道这是复杂的编码，但请检查一下。
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
String email=null;
String password=null;
img_btn_login=(ImageButton)findViewById(R.id.image_btn_login);
img_btn_Register=(ImageButton)findViewById(R.id.image_btn_register);
edit_txt_EmailAddress=(EditText)findViewById(R.id.edit_txt_EmailAddress);
edit_txt_Password=(EditText)findViewById(R.id.editText1);
prefsNagSetting = getApplicationContext().getSharedPreferences(NAG_PREFS, Context.MODE_PRIVATE);
// GET THE NAG SETTING
final boolean blNagSetting = prefsNagSetting.getBoolean(NAG_SETTING, false);
img_btn_Register.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent goRegister=new Intent(Login.this,Register.class);
startActivity(goRegister);
}
});
link_forgetPassoword=(Button)findViewById(R.id.button1);
link_forgetPassoword.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent myWebLink = new Intent(android.content.Intent.ACTION_VIEW);
myWebLink.setData(Uri.parse("http://www.speedlink-td.info/service/football365/password/index.html"));
startActivity(myWebLink);
}
});
img_btn_login.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(edit_txt_EmailAddress.getText().toString().trim().equals("")||edit_txt_EmailAddress.getText().toString().trim().equals(null)){
showAlertDialog(Login.this, "Email",
"Enter Email", false);
edit_txt_EmailAddress.requestFocus();
}
else if(!isValidEmail(edit_txt_EmailAddress.getText().toString().trim()))
{
showAlertDialog(Login.this, "Email",
"Enter Valid Email", false);
edit_txt_EmailAddress.selectAll();
}
else if(edit_txt_Password.getText().toString().equals("")||edit_txt_Password.getText().toString().trim().equals(null))
{
showAlertDialog(Login.this, "Password", "Enter Password", false);
edit_txt_Password.requestFocus();
}
else{
JSONObject json=null;
int status=2;
String userID=null;
String teamID=null;
String teamName=null;
String admin=null;
String backNo=null;
String userName=null;
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("email",edit_txt_EmailAddress.getText().toString()));//// define the parameter
postParameters.add(new BasicNameValuePair("password",edit_txt_Password.getText().toString()));
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
.detectDiskReads().detectDiskWrites().detectNetwork() // StrictMode is most commonly used to catch accidental disk or network access on the application's main thread
.penaltyLog().build());
ArrayList<NameValuePair> pp = new ArrayList<NameValuePair>();
//postParameters.add(new BasicNameValuePair("userID","396797666"));
String response = null;
try {
response=CustomHttpClient.executeHttpPost("http://10.0.2.2/football365/login.php", postParameters);
json=new JSONObject(response);
userID=json.getString("userID");
}
catch (Exception e) {
e.printStackTrace();
}
Log.i("USERID", userID+"");
JSONObject json_data = null;
String teamStatus ="";
String result = response.toString();
JSONObject jsonobj = null;
try{
jsonobj = new JSONObject (result);
teamStatus=jsonobj.getString("teamStatus");
}
catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
}
Log.i("TeamStatus", result+"");
Log.i("RESULT", teamStatus+"");
//Log.i("halo",teamStatus+"");
String[] teamSaving=new String[6];
String[] noteamSaving=new String[2];
if (blNagSetting == true){
if(teamStatus.equals("1")){
try {
Log.i("Team Kyaw Win tal","Log in ma twar buu.");
userName=jsonobj.getString("userName");
userID=jsonobj.getString("userID");
teamID=jsonobj.getString("teamID");
teamName=jsonobj.getString("teamName");
admin=jsonobj.getString("admin");
backNo=jsonobj.getString("backNo");
teamSaving[0]=userName;
teamSaving[1]=userID;
teamSaving[2]=teamID;
teamSaving[3]=teamName;
teamSaving[4]=admin;
teamSaving[5]=backNo;
String email=edit_txt_EmailAddress.getText().toString().trim();
String password = edit_txt_Password.getText().toString().trim();
Log.i("Email",email);
Log.i("Password",password);
Intent teamshitoMain=new Intent(Login.this,MainActivity.class);
teamshitoMain.putExtra("email", email);
teamshitoMain.putExtra("password", password);
// teamshitoMain.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(teamshitoMain);
Log.i("USerName", userName+"");
Log.i("UserID",userID+"");
Log.i("TeamId",teamID+"");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Intent teamshi=new Intent(Login.this,Team.class);
teamshi.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(teamshi);
finish();
}
else if(teamStatus.equals("0"))
{
try {
Log.i("NoTeam Kyaw Win tal","Log in ma twar buu.");
userName=jsonobj.getString("userName");
userID=jsonobj.getString("userID");
noteamSaving[0]=userName;
noteamSaving[1]=userID;
String email=edit_txt_EmailAddress.getText().toString().trim();
String password = edit_txt_Password.getText().toString().trim();
Log.i("Email",email);
Log.i("Password",password);
Intent teamshitoMain=new Intent(Login.this,MainActivity.class);
teamshitoMain.putExtra("email", email);
teamshitoMain.putExtra("password", password);
// teamshitoMain.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(teamshitoMain);
Log.i("USerNameNN", userName+"");
Log.i("UserIDNN",userID+"");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Intent noteamshi=new Intent(Login.this,NoTeam.class);
noteamshi.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(noteamshi);
finish();
}
}else
{
if(teamStatus.equals("1")){
try {
Log.i("Team Win tal","Log in hmar");
userName=jsonobj.getString("userName");
userID=jsonobj.getString("userID");
teamID=jsonobj.getString("teamID");
teamName=jsonobj.getString("teamName");
admin=jsonobj.getString("admin");
backNo=jsonobj.getString("backNo");
teamSaving[0]=userName;
teamSaving[1]=userID;
teamSaving[2]=teamID;
teamSaving[3]=teamName;
teamSaving[4]=admin;
teamSaving[5]=backNo;
String email=edit_txt_EmailAddress.getText().toString().trim();
String password = edit_txt_Password.getText().toString().trim();
Log.i("Email",email);
Log.i("Password",password);
Intent teamshitoMain=new Intent(Login.this,MainActivity.class);
teamshitoMain.putExtra("email", email);
teamshitoMain.putExtra("password", password);
// teamshitoMain.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(teamshitoMain);
Log.i("USerName", userName+"");
Log.i("UserID",userID+"");
Log.i("TeamId",teamID+"");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Intent teamshi=new Intent(Login.this,Team.class);
teamshi.putExtra("TeamSaving", teamSaving);
startActivity(teamshi);
insertSave();
}
else if(teamStatus.equals("0"))
{
try {
Log.i("noTeam Win tal","Log in hmar");
userName=jsonobj.getString("userName");
userID=jsonobj.getString("userID");
noteamSaving[0]=userName;
noteamSaving[1]=userID;
Log.i("USerNameNN", userName+"");
Log.i("UserIDNN",userID+"");
String email=edit_txt_EmailAddress.getText().toString().trim();
String password = edit_txt_Password.getText().toString().trim();
Log.i("Email",email);
Log.i("Password",password);
Intent teamshitoMain=new Intent(Login.this,MainActivity.class);
teamshitoMain.putExtra("email", email);
teamshitoMain.putExtra("password", password);
// teamshitoMain.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(teamshitoMain);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Intent noteamshi=new Intent(Login.this,NoTeam.class);
noteamshi.putExtra("NoTeamSaving", noteamSaving);
startActivity(noteamshi);
insertSave();
}
else{
showAlertDialog(Login.this,"Invalid Email and Password", "Enter Valid Email and Password", false);
}
}
}
}
});
}
答案 0 :(得分：1)
你有没有试过？
email=getIntent().getExtras().getString("email");
password=getIntent().getExtras().getString("password");
您还可以检查您的意图是否具有值。
String email="";
Bundle b = getIntent().getExtras();
if (b != null && b.containsKey("email")) {
email = getIntent().getExtras().getString("email");
}
答案 1 :(得分：0)
试试这个：
Intent intentfromLogin = getIntent();
Bundle extras =intentfromLogin.getExtras();
email=extras .getStringExtra("email");
password=extras .getStringExtra("password");
您需要从意图“额外数据”中获取