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在用戶配置文件中創建android應用程序時，當用戶點擊密碼編輯文本應該顯示彈出窗口我已經實現了它，但是當我點擊編輯文本它給了我下面的錯誤。我GOOGLE了它，但沒有找到任何有用的解決方案。請你可以告訴我附上代碼：在androidchange中打開密碼警報對話框的java.lang.null指針異常
java.lang.NullPointerException：試圖調用虛擬方法'android.content.resourcesResource $ Theme android.content.Context.getTheme（）'對一個空對象引用 at android.app.AlertDialog.resolveDialogTheme（AlertDialog.java:222） at android.app.AlertDialog $ Builder。（AlertDialog.java:452） at com.example.admin.avisar.UserProfile $ 2.onClick（UserProfile。 java：71） at android.view.View.performClick（View.java:5612） at android.view.View $ PerformClick.run（View.java:22285） at android.os.Handler.handleCallback（Handler。 java：751） at android.os.Handler.dispatchMessage（Handler.java:95） at android.os.Looper.loop（Looper.java:154） at android.app.ActivityThread.main（ActivityThread.java:6123） at java.lang.reflect.Method.invoke（Native Method） at com .android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:867） at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:757） 06-01 12：35：00.558 1563- 5452 /？ E/ActivityManager：從系統4237發送未受保護的廣播com.motorola.motocare.INTENT_TRIGGER：com.motorola.process.system/1000 pkg com.motorola.motgeofencesvc java.lang.Throwable at com.android.server.am .ActivityManagerService.broadcastIntentLocked（ActivityManagerService.java:18226） 在com.android.server.am.ActivityManagerService.broadcastIntent（ActivityManagerService.java:18826） 在android.app.ActivityManagerNative.onTransact（ActivityManagerNative.java:512） 在玉米.android.server.am.ActivityManagerService.onTransact（ActivityManagerService.java:2906） 在android.os.Binder.execTransact（Binder.java:565）
code here
package com.example.admin.avisar;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.example.admin.avisar.network.CompletionListener;
import com.example.admin.avisar.network.NetworkTask;
import com.example.admin.avisar.network.Post_URL;
import com.example.admin.avisar.network.Responce;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class UserProfile extends AppCompatActivity implements CompletionListener{
EditText name,mobno,email,add,accid,pass,yeared;
Button svebtn;
ProgressDialog progressDialog;
private NetworkTask networkTask;
Context context;
String uid;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_profile);
ActionBar actionBar = getSupportActionBar();
actionBar.setTitle("My Profile");
actionBar.setDisplayHomeAsUpEnabled(true);
name = (EditText)findViewById(R.id.name);
mobno = (EditText)findViewById(R.id.mobno);
email = (EditText)findViewById(R.id.email);
add = (EditText)findViewById(R.id.add);
accid = (EditText)findViewById(R.id.id);
pass = (EditText)findViewById(R.id.pass);
yeared = (EditText)findViewById(R.id.year);
svebtn = (Button)findViewById(R.id.svebtn);
userProfileWebService();
svebtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
userProfileUpdate();
}
});
pass.setOnClickListener(new View.OnClickListener() {
String newpass="";
String confirmpass="";
@Override
public void onClick(View view) {
AlertDialog.Builder alert = new AlertDialog.Builder(UserProfile.this);
alert.setTitle("change password"); //Set Alert dialog title here
final EditText newpassed = new EditText(context);
newpassed.setHint("New password");
alert.setView(newpassed);
final EditText confirmpassed = new EditText(context);
confirmpassed.setHint("Confirm password");
alert.setView(confirmpassed);
alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
if(newpassed.length()==0){
newpassed.requestFocus();
newpassed.setError("FIELD CANNOT BE EMPTY");
newpass = confirmpassed.getEditableText().toString();
}else if (confirmpassed.length()==0) {
confirmpassed.requestFocus();
confirmpassed.setError("FIELD CANNOT BE EMPTY");
confirmpass = confirmpassed.getEditableText().toString();
}else if(confirmpass==newpass){
passwordwebservice(newpassed);
}else{
confirmpassed.setError("confirm password doesnot match");
}
// Toast.makeText(context, srt, Toast.LENGTH_LONG).show();
} // End of onClick(DialogInterface dialog, int whichButton)
}); //End of alert.setPositiveButton
alert.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Canceled.
dialog.cancel();
}
}); //End of alert.setNegativeButton
AlertDialog alertDialog = alert.create();
alertDialog.show();
}
});
}
private void passwordwebservice(EditText newpassed){
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Loading");
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressDialog.setIndeterminate(true);
progressDialog.setProgress(0);
progressDialog.show();
progressDialog.setCanceledOnTouchOutside(false);
networkTask = new NetworkTask(this,this,false);
String newpass = newpassed.getEditableText().toString();
List<NameValuePair> params =new ArrayList<>();
params.add(new BasicNameValuePair("userid",uid));
params.add(new BasicNameValuePair("password",newpass));
params.add(new BasicNameValuePair("userid",uid));
networkTask.execute(params, Post_URL.URL_update_password, 3);
}
//userprofile view webservice
private void userProfileWebService(){
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Loading");
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressDialog.setIndeterminate(true);
progressDialog.setProgress(0);
progressDialog.show();
progressDialog.setCanceledOnTouchOutside(false);
networkTask = new NetworkTask(this,this,false);
List<NameValuePair> params =getRequestParams();
networkTask.execute(params, Post_URL.URL_Profile, 1);
}
//parameter passing for userprofile webservice
private List<NameValuePair> getRequestParams() {
SharedPreferences sharedPreferences = getSharedPreferences("A", Context.MODE_PRIVATE);
uid = sharedPreferences.getString("user_id","abc");
Log.e("TAG",uid);
List<NameValuePair> param1 = new ArrayList<NameValuePair>();
param1.add(new BasicNameValuePair("userid", uid));
return param1;
}
private void userProfileUpdate(){
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Loading");
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressDialog.setIndeterminate(true);
progressDialog.setProgress(0);
progressDialog.show();
progressDialog.setCanceledOnTouchOutside(false);
networkTask = new NetworkTask(this,this,false);
List<NameValuePair> params =getRequestParamsupdate();
networkTask.execute(params, Post_URL.URL_update_profile, 2);
}
private List<NameValuePair> getRequestParamsupdate(){
String username = name.getText().toString();
String mno = mobno.getText().toString();
String mail = email.getText().toString();
String address = add.getText().toString();
String accout_id = accid.getText().toString();
// String password= pass.getText().toString();
String yearString = yeared.getText().toString();
List<NameValuePair> pairs = new ArrayList<>();
pairs.add(new BasicNameValuePair("username",username));
pairs.add(new BasicNameValuePair("mobno",mno));
pairs.add(new BasicNameValuePair("email",mail));
pairs.add(new BasicNameValuePair("add",address));
pairs.add(new BasicNameValuePair("userid",accout_id));
// pairs.add(new BasicNameValuePair("password",password));
pairs.add(new BasicNameValuePair("year",yearString));
return pairs;
}
//user profile response handle
private void handleUserProfileResponse(JSONObject serverResponse){
int success=0;
try{
success = serverResponse.getInt(Responce.TAG_SUCCESS);
if(success==1){
progressDialog.dismiss();
//parsing the data
JSONArray user_profile = serverResponse.getJSONArray("user_details");
for(int i =0 ;i<user_profile.length();i++){
String name1 = user_profile.getJSONObject(i).getString("username");
String mno = user_profile.getJSONObject(i).getString("mobno");
//Log.e("TAG",name1);
String mail = user_profile.getJSONObject(i).getString("email");
String address = user_profile.getJSONObject(i).getString("add");
String accountid = user_profile.getJSONObject(i).getString("userid");
String password = user_profile.getJSONObject(i).getString("password");
String year = user_profile.getJSONObject(i).getString("year");
//set data to textview
name.setText(name1);
mobno.setText(mno);
email.setText(mail);
add.setText(address);
accid.setText(accountid);
pass.setText(password);
yeared.setText(year);
}
}
else{
progressDialog.dismiss();
Toast.makeText(UserProfile.this, serverResponse.getString(Responce.TAG_MESSAGE), Toast.LENGTH_LONG).show();
}
}catch (JSONException e){
}
}
private void handleUserProfileUpdateResponse(JSONObject serverResponse){
int success =0;
try{
success = serverResponse.getInt(Responce.TAG_SUCCESS);
if (success ==1){
progressDialog.dismiss();
Toast.makeText(UserProfile.this, serverResponse.getString(Responce.TAG_MESSAGE), Toast.LENGTH_LONG).show();
}
else{
progressDialog.dismiss();
Toast.makeText(UserProfile.this, serverResponse.getString(Responce.TAG_MESSAGE), Toast.LENGTH_LONG).show();
}
}catch(JSONException e)
{
}
}
private void handleUpdatePassResponse(JSONObject serverResponse){
int success =0;
try{
success = serverResponse.getInt(Responce.TAG_SUCCESS);
if (success ==1){
progressDialog.dismiss();
Toast.makeText(UserProfile.this, serverResponse.getString(Responce.TAG_MESSAGE), Toast.LENGTH_LONG).show();
}
else{
progressDialog.dismiss();
Toast.makeText(UserProfile.this, serverResponse.getString(Responce.TAG_MESSAGE), Toast.LENGTH_LONG).show();
}
}catch(JSONException e)
{
}
}
@Override
public void onComplete(JSONObject serverResponse, int RESPONSE_IDENTIFIER_FLAG) throws JSONException {
switch (RESPONSE_IDENTIFIER_FLAG){
case 1:handleUserProfileResponse(serverResponse);
break;
case 2: handleUserProfileUpdateResponse(serverResponse);
break;
case 3:handleUpdatePassResponse(serverResponse);
default:
break;
}
}
}
謝謝你，我已經嘗試過了，但我仍得到相同的異常應用程序是不幸的是越來越停止 – pokales
後您充分的活動代碼。我會盡力解決你的問題。 –
我已經添加了活動plz幫助的完整代碼，如果可以 – pokales