我是 SharedPreferences 和 SQLite 的新手。
我已经引用在线示例实现了 SharedPreferences。
当我调试期望配置文件时(我得到配置文件的“默认”值)，所有其他值都是正确的，因为我从我的设备插入
但是当我按下一个按钮时，它会抛出一些错误。
我用谷歌搜索，但没有得到预期的任何答案。
请帮助我了解我在哪里犯了错误。
DBHandler 类
package com.example.app;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.sql.Blob;
import java.sql.SQLData;
import android.R.raw;
import android.app.Activity;
import android.app.Application;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.preference.PreferenceManager.OnActivityResultListener;
import android.text.StaticLayout;
import android.util.Log;
import android.widget.Toast;
public class DBHandler extends SQLiteOpenHelper{
public static int VERSION_NAME=1;
public static String DATABASE_NAME="altaf";
public static String TABLE_REGISTER="register";
public static String PERSON_ID="_PersonId";
public static String PERSON_FNAME="FirstName";
public static String PERSON_EMAIL="EmaiId";
public static String PERSON_PASSWORD="Password";
public static String PERSON_PHOTO="Photo";
public static String PERSON_GENDER="Gender";
public static String PERSON_COUNTRY="Country";
public static String PERSON_STATE="State";
public static String PERSON_CITY="City";
public static String PERSON_S_QUE="Squestion";
public static String PERSON_DOB="dob";
public static String PERSON_UNAME="Uname";
Context context;
public DBHandler(Context context) {
super(context, DATABASE_NAME, null, VERSION_NAME);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
try{
String create_table="CREATE TABLE " + TABLE_REGISTER + "(" + PERSON_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + PERSON_FNAME + " TEXT NOT NULL," + PERSON_EMAIL + " TEXT NOT NULL," + PERSON_PASSWORD + " TEXT NOT NULL," + PERSON_PHOTO + " blob not null," + PERSON_GENDER + " TEXT NOT NULL," + PERSON_COUNTRY + " TEXT NOT NULL," + PERSON_STATE + " TEXT NOT NULL," + PERSON_CITY + " TEXT NOT NULL," + PERSON_S_QUE + " TEXT NOT NULL," + PERSON_DOB + " DATE," + PERSON_UNAME + " TEXT NOT NULL )";
db.execSQL(create_table);
}
catch(Exception e)
{
Log.e("failed to create table", e.toString());
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS"+TABLE_REGISTER);
onCreate(db);
}
public void insert(String fname,String email,String pwd,String profile,String gender,String country,String state,String city,String sec_que,String dob,String uname) throws SQLException{
SQLiteDatabase db=this.getWritableDatabase();
ContentValues cv=new ContentValues();
cv.put(PERSON_FNAME, fname);
cv.put(PERSON_EMAIL, email);
cv.put(PERSON_PASSWORD, pwd);
cv.put(PERSON_PHOTO, profile);
cv.put(PERSON_GENDER, gender);
cv.put(PERSON_COUNTRY, country);
cv.put(PERSON_STATE, state);
cv.put(PERSON_CITY, city);
cv.put(PERSON_COUNTRY, sec_que);
cv.put(PERSON_STATE, dob);
cv.put(PERSON_CITY, uname);
db.insert(TABLE_REGISTER, null, cv);
db.close();}
mainActivity class
package com.example.app;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
EditText e_fname,e_pwd,e_email;
Button b_register;
final int one=1;
public static String msg="success";
public static String error="unsuccess";
CheckBox c_agree,c_spwd;
TextView t_tc;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
e_fname=(EditText)findViewById(R.id.r_e_fnm);
e_pwd=(EditText)findViewById(R.id.r_e_pwd);
e_email=(EditText)findViewById(R.id.r_e_email);
b_register=(Button)findViewById(R.id.b_register);
c_agree=(CheckBox)findViewById(R.id.r_ch_agree);
c_spwd=(CheckBox)findViewById(R.id.r_ch_spwd);
t_tc=(TextView)findViewById(R.id.r_t_tc);
final DBHandler handler=new DBHandler(this);
SQLiteDatabase db=handler.getWritableDatabase();
SharedPreferences pref=getApplicationContext().getSharedPreferences("pref", MODE_PRIVATE);
final Editor editor=pref.edit();
c_spwd.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(!isChecked)
{
e_pwd.setTransformationMethod(PasswordTransformationMethod.getInstance());
}else
{
e_pwd.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
}
}
});
b_register.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String fname,pwd,email;
fname=e_fname.getText().toString();
email=e_email.getText().toString();
pwd=e_pwd.getText().toString();
if(fname.equals("")|| email.equals("")||pwd.equals(""))
{
e_fname.setError("field is required");
e_pwd.setError("field is required");
e_email.setError("field is required");
}
else
{
String PERSON_FNAME="FirstName";
String PERSON_EMAIL="EmaiId";
String PERSON_PASSWORD="Password";
editor.putString(PERSON_FNAME, fname);
editor.putString(PERSON_EMAIL, email);
editor.putString(PERSON_PASSWORD, pwd);
editor.apply();
Toast.makeText(getApplication(), fname+ " " + "Is Redirecting", Toast.LENGTH_SHORT).show();
Intent i=new Intent(MainActivity.this,reg1.class);
startActivity(i);
}
}
});
}
reg1 类
package com.example.app;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.Toast;
public class reg1 extends
Activity{
public static String GEENDER="gender";
public static String imgDecodableString="imgDecodableStringr";
//public static String GEENDER="gender";
public static int RESULT_LOAD_IMG = 1;
Intent data ;
ImageView imageView;
Button register1;
Uri selectedImage ;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.reg_1);
imageView=(ImageView)findViewById(R.id.img_select);
register1=(Button)findViewById(R.id.b_r1_add);
SharedPreferences sp1=getApplication().getSharedPreferences("pref", MODE_PRIVATE);
final Editor editor=sp1.edit();
imageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
loadimagefrmgallery(v);
}
});
final RadioButton female=(RadioButton)findViewById(R.id.imageView1);
final RadioButton male=(RadioButton)findViewById(R.id.imageView2);
male.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(male.isChecked())
{
male.setChecked(true);
GEENDER="male";
female.setChecked(false);
}
}
});
female.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(female.isChecked())
{
female.setChecked(true);
GEENDER="female";
male.setChecked(false);
}
}
});
register1.setOnClickListener(new OnClickListener() {
@SuppressWarnings("static-access")
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
DBHandler handler=new DBHandler(getApplicationContext());
SQLiteDatabase db=handler.getWritableDatabase();
Bitmap bitmap=BitmapFactory.decodeFile(imgDecodableString);
// convert bitmap to byte
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte imageInByte[] = stream.toByteArray();
String image = null;
try {
image = new String(imageInByte, "UTF");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String PERSON_PHOTO="Photo";
String PERSON_GENDER="Gender";
editor.putString(PERSON_PHOTO, image);
editor.putString(PERSON_GENDER, GEENDER);
editor.apply();
Toast.makeText(getApplicationContext(), "moving", Toast.LENGTH_SHORT).show();
Intent i=new Intent(reg1.this,reg2.class);
startActivity(i);
}
});
}
reg2 类
package com.example.app;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;
import android.widget.AdapterView.OnItemSelectedListener;
public class reg2 extends Activity{
Spinner s_con,s_stat,s_ct;
Button register2;
public static String country1,state1,city1;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.reg_2);
s_con=(Spinner)findViewById(R.id.r_spin_con);
s_stat=(Spinner)findViewById(R.id.r_spin_stat);
s_ct=(Spinner)findViewById(R.id.r_spin_ct);
register2=(Button)findViewById(R.id.b_r2_add);
SharedPreferences sp2=getApplication().getSharedPreferences("pref", MODE_PRIVATE);
final Editor editor=sp2.edit();
ArrayList<String>a=new ArrayList<String>();
ArrayList<String>a1=new ArrayList<String>();
ArrayList<String>a2=new ArrayList<String>();
a.add("India");
a.add("England");
a.add("USA");
a.add("Pakistan");
a1.add("Panjab");
a1.add("gujarat");
a1.add("Berkshire");
a2.add("surat");
a2.add("great manchester");
a2.add("london");
final ArrayAdapter<String>adapter1=new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item,a1);
final ArrayAdapter<String>adapter2=new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item,a2);
final ArrayAdapter<String>adapter=new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item,a);
s_con.setAdapter(adapter);
s_stat.setAdapter(adapter1);
s_ct.setAdapter(adapter2);
s_con.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
country1=parent.getItemAtPosition(position).toString();
Toast.makeText(getApplicationContext(), country1, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
});
s_stat.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
state1=parent.getItemAtPosition(position).toString();
Toast.makeText(getApplicationContext(), state1, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
});
s_ct.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
city1=parent.getItemAtPosition(position).toString();
Toast.makeText(getApplicationContext(), city1, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
});
register2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
DBHandler handler=new DBHandler(getApplicationContext());
SQLiteDatabase db=handler.getWritableDatabase();
String PERSON_COUNTRY="Country";
String PERSON_STATE="State";
String PERSON_CITY="City";
editor.putString(PERSON_COUNTRY, country1);
editor.putString(PERSON_STATE, state1 );
editor.putString(PERSON_CITY, city1 );
editor.apply();
Toast.makeText(getApplicationContext(), "moving", Toast.LENGTH_SHORT).show();
Intent i=new Intent(reg2.this,reg3.class);
startActivity(i);
}
});
}}
reg3 类
package com.example.app;
import java.io.IOException;
import java.util.ArrayList;
import android.R.integer;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
public class reg3 extends Activity {
Spinner s_sq;
EditText dob,unm;
Button register3;
public static String PREF="pref";
public static String def_val="default";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.reg_3);
s_sq=(Spinner)findViewById(R.id.r_spin_sq);
dob=(EditText) findViewById(R.id.r_e_dob);
unm=(EditText) findViewById(R.id.editText1);
register3=(Button)findViewById(R.id.b_add3);
ArrayList<String>a=new ArrayList<String>();
final ArrayAdapter<String>adapter=new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item,a);
a.add("when were you born?");
a.add("what is your nick name?");
a.add("what is your childhood name");
a.add("what city your parents were met");
a.add("what is your city name");
s_sq.setAdapter(adapter);
final SharedPreferences pref=getApplication().getSharedPreferences(PREF, MODE_PRIVATE);
final SharedPreferences pref1=getApplication().getSharedPreferences(PREF, MODE_PRIVATE);
final SharedPreferences pref2=getApplication().getSharedPreferences(PREF, MODE_PRIVATE);
register3.setOnClickListener(new OnClickListener() {
@SuppressWarnings("static-access")
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
DBHandler handler=new DBHandler(getApplicationContext());
SQLiteDatabase db=handler.getWritableDatabase();
String dob1=dob.getText().toString();
String uname=unm.getText().toString();
String sec_que=s_sq.getSelectedItem().toString();
String PERSON_FNAME="FirstName";
String PERSON_EMAIL="EmaiId";
String PERSON_PASSWORD="Password";
String PERSON_PHOTO="Photo";
String PERSON_GENDER="Gender";
String PERSON_COUNTRY="Country";
String PERSON_STATE="State";
String PERSON_CITY="City";
String fname=pref.getString(PERSON_FNAME, def_val);
String email=pref.getString(PERSON_EMAIL, def_val);
String pwd=pref.getString(PERSON_PASSWORD, def_val);
String profile=pref1.getString(PERSON_PHOTO, def_val);
String gender=pref1.getString(PERSON_GENDER, def_val);
String country=pref2.getString(PERSON_COUNTRY, def_val);
String state=pref2.getString(PERSON_STATE, def_val);
String city=pref2.getString(PERSON_CITY, def_val);
handler.insert(fname, email, pwd, profile, gender, country, state, city, sec_que, dob1, uname);
Intent i=new Intent(reg3.this,home.class);
startActivity(i);
Toast.makeText(getApplicationContext(),"Registered", Toast.LENGTH_LONG).show();
}
});
}
}
日志
11-18 02:09:55.846: E/SQLiteDatabase(23920): Error inserting EmaiId=a State=1/1/1992 Gender=male Password=a FirstName=a Country=what is your childhood name Photo=default City=altu
11-18 02:09:55.846: E/SQLiteDatabase(23920): android.database.sqlite.SQLiteConstraintException: register.Squestion may not be NULL (code 19)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:775)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1469)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at com.example.app.DBHandler.insert(DBHandler.java:94)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at com.example.app.reg3$1.onClick(reg3.java:84)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.view.View.performClick(View.java:4084)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.view.View$PerformClick.run(View.java:16966)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.os.Handler.handleCallback(Handler.java:615)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.os.Handler.dispatchMessage(Handler.java:92)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.os.Looper.loop(Looper.java:137)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at android.app.ActivityThread.main(ActivityThread.java:4745)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at java.lang.reflect.Method.invokeNative(Native Method)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at java.lang.reflect.Method.invoke(Method.java:511)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-18 02:09:55.846: E/SQLiteDatabase(23920): at dalvik.system.NativeStart.main(Native Method)
最佳答案
与 TABLE_REGISTER 一样，PERSON_S_QUE 也可用于 TEXT NOT NULL 属性，但在表中插入数据时不添加 PERSON_S_QUE ContentValues 中的列值。
在insert方法中添加如下内容:
cv.put(PERSON_S_QUE, sec_que);
关于android - 使用 SharedPreferences 将值插入 SQLite 时出错，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33777454/