Android数据库连接错误API低于23
（首先，我不是以英语为母语的人，所以我的英语很差） 我一直在开发一款android应用程序。基本上，我需要连接到SQL Server 2012 express数据库。在我使用不同的API 23之前，所有这些都可以正常工作。我在其他话题上发现了这个错误，但没有一个答案对我有效。这就是错误：Android数据库连接错误API低于23,android,database,api,Android,Database,Api,（首先，我不是以英语为母语的人，所以我的英语很差） 我一直在开发一款android应用程序。基本上，我需要连接到SQL Server 2012 express数据库。在我使用不同的API 23之前，所有这些都可以正常工作。我在其他话题上发现了这个错误，但没有一个答案对我有效。这就是错误： 04-08 10:56:06.510 1761-1761/com.example.*****.controlcodigosbox E/AndroidRuntime: FATAL EXCEPTION: main
04-08 10:56:06.510 1761-1761/com.example.*****.controlcodigosbox E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:289)
at android.view.View.performClick(View.java:4204)
at android.view.View$PerformClick.run(View.java:17355)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:4204)
at android.view.View$PerformClick.run(View.java:17355)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.VerifyError: net/sourceforge/jtds/jdbc/TdsCore
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:359)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
at java.sql.DriverManager.getConnection(DriverManager.java:175)
at java.sql.DriverManager.getConnection(DriverManager.java:140)
at com.example.*****.controlcodigosbox.ConnectionClass.CONN(ConnectionClass.java:32)
at com.example.*****.controlcodigosbox.MainActivity.onClickRegistrar(MainActivity.java:95)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:4204)
at android.view.View$PerformClick.run(View.java:17355)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
public class MainActivity extends AppCompatActivity {
private String idDiametro, idMaterial, idAncho, idGama;
private String codigoS;
private LinearLayout layoutMuestra;
private TextView material, diametro, ancho, gama;
private Spinner spinnerBox;
private String[] arrayBox;
private EditText codigo, cantidad;
private ConnectionClass connectionClass;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
layoutMuestra = (LinearLayout) findViewById(R.id.layoutMuestra);
spinnerBox = (Spinner) findViewById(R.id.spinnerBox);
arrayBox = getResources().getStringArray(R.array.arrayBox);
codigo = (EditText) findViewById(R.id.editCodigo);
connectionClass = new ConnectionClass();
material = (TextView) findViewById(R.id.lblMaterial);
diametro = (TextView) findViewById(R.id.lblDiametro);
ancho = (TextView) findViewById(R.id.lblAncho);
gama = (TextView) findViewById(R.id.lblGama);
cantidad = (EditText) findViewById(R.id.editCantidad);
Toast.makeText(MainActivity.this, "¡LA PRUEBA BUENA!", Toast.LENGTH_SHORT).show();
ArrayAdapter <CharSequence> adaptador = ArrayAdapter.createFromResource(this, R.array.arrayBox, android.R.layout.simple_spinner_dropdown_item);
spinnerBox.setAdapter(adaptador);
codigo.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
if (codigo.getText().toString().equals("")) {
layoutMuestra.setVisibility(View.GONE);
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
if (codigo.getText().toString().equals("")) {
layoutMuestra.setVisibility(View.GONE);
}
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (codigo.getText().toString().equals("")) {
layoutMuestra.setVisibility(View.GONE);
}
}
});
}
public void onClickRegistrar(View v) {
Boolean visible = true;
codigoS = codigo.getText().toString();
if(cantidad.getText().toString().equals("")){
cantidad.setText("0");
}
if (codigo.getText().toString().equals("")) {
Toast.makeText(MainActivity.this, "¡Error! ¡Introduce un código!", Toast.LENGTH_SHORT).show();
} else if (codigo.getText().toString().length() != 15 && codigo.getText().toString().length() != 13){
Toast.makeText(MainActivity.this, "¡Error! ¡Introduce un código válido!", Toast.LENGTH_SHORT).show();
}else {
String msg = null;
//SEPARO EL CODIGO EN LOS RESPECTIVO SUBSTRINGS
idMaterial = codigoS.substring(2, 3);
idDiametro = codigoS.substring(3, 7);
idAncho = codigoS.substring(7, 11);
idGama = codigoS.substring(11);
try {
Connection con = connectionClass.CONN();
if (con == null) {
Toast.makeText(MainActivity.this, "¡NO SE HA CONECTADO A LA BD!", Toast.LENGTH_SHORT).show();
msg = "Error in connection with SQL server";
} else {
String query = "select valor from MATERIAL where id='" + idMaterial + "'";
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
if(rs.next()){
material.setText(rs.getString(1));
} else {
Toast.makeText(MainActivity.this, "¡NO HA ENCONTRADO EL MATERIAL!", Toast.LENGTH_SHORT).show();
visible = false;
}
query = "select valor from DIAMETRO where id='" + idDiametro + "'";
stmt = con.createStatement();
rs = stmt.executeQuery(query);
if(rs.next()){
diametro.setText(rs.getString(1));
} else {
Toast.makeText(MainActivity.this, "¡NO HA ENCONTRADO EL DIAMETRO!", Toast.LENGTH_SHORT).show();
visible = false;
}
query = "select valor from ANCHO where id='" + idAncho + "'";
stmt = con.createStatement();
rs = stmt.executeQuery(query);
if(rs.next()){
ancho.setText(rs.getString(1));
} else {
Toast.makeText(MainActivity.this, "¡NO HA ENCONTRADO EL ANCHO!", Toast.LENGTH_SHORT).show();
visible = false;
}
query = "select valor from GAMA where id='" + idGama + "'";
stmt = con.createStatement();
rs = stmt.executeQuery(query);
if(rs.next()){
gama.setText(rs.getString(1));
} else {
Toast.makeText(MainActivity.this, "¡NO HA ENCONTRADO LA GAMA!", Toast.LENGTH_SHORT).show();
visible = false;
}
if(visible == true){
layoutMuestra.setVisibility(View.VISIBLE);
}
}
} catch (Exception ex) {
msg = "Exceptions";
}
//GUARDAMOS LOS DATOS EN EL EXCEL
//OBTENGO LA CANTIDAD DE BOX Y DE UNIDADES
int cantBox = Integer.parseInt(arrayBox[spinnerBox.getSelectedItemPosition()]);
int cantUnidad = Integer.parseInt(cantidad.getText().toString());
}
}
}
导入android.os.Bundle；
导入android.support.v7.app.AppActivity；
导入android.text.Editable；
导入android.text.TextWatcher；
导入android.view.view；
导入android.widget.ArrayAdapter；
导入android.widget.EditText；
导入android.widget.LinearLayout；
导入android.widget.Spinner；
导入android.widget.TextView；
导入android.widget.Toast；
导入java.sql.Connection；
导入java.sql.ResultSet；
导入java.sql.Statement；
公共类MainActivity扩展了AppCompatActivity{
私有字符串idDiametro、idMaterial、idAncho、idGama；
私有字符串codigoS；
私人线路布局图；
私有文本视图材料，diametro，ancho，gama；
私人纺纱机；
私有字符串[]arrayBox；
私人编辑文本codigo，cantidad；
私有连接类连接类；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
layoutMuestra=（LinearLayout）findViewById（R.id.layoutMuestra）；
喷丝板盒=（喷丝板）findViewById（R.id.spinnerBox）；
arrayBox=getResources（）.getStringArray（R.array.arrayBox）；
codigo=（EditText）findViewById（R.id.editCodigo）；
connectionClass=新的connectionClass（）；
材料=（文本视图）findViewById（R.id.LBL材料）；
diametro=（TextView）findViewById（R.id.lblDiametro）；
ancho=（文本视图）findViewById（R.id.lblAncho）；
gama=（TextView）findViewById（R.id.lblGama）；
cantidad=（EditText）findViewById（R.id.editCantidad）；
Toast.makeText（MainActivity.this，“LA PRUEBA BUENA！”，Toast.LENGTH\u SHORT.show（）；
ArrayAdapter Adapter=ArrayAdapter.createFromResource（这个，R.array.arrayBox，android.R.layout.simple\u微调器\u下拉菜单\u项）；
喷丝头箱。设置适配器（适配器）；
codigo.addTextChangedListener（新的TextWatcher（）{
公共无效后文本已更改（可编辑）{
if（codigo.getText（）.toString（）.equals（“”）{
layoutMuestra.setVisibility（View.GONE）；
}
}
更改前文本之前的公共void（字符序列s、int start、int count、int after）{
if（codigo.getText（）.toString（）.equals（“”）{
layoutMuestra.setVisibility（View.GONE）；
}
}
public void onTextChanged（字符序列、int start、int before、int count）{
if（codigo.getText（）.toString（）.equals（“”）{
layoutMuestra.setVisibility（View.GONE）；
}
}
});
}
公共注册处（视图五）{
布尔可见=真；
codigoS=codigo.getText（）.toString（）；
if（cantidad.getText（）.toString（）.equals（“”）{
cantidad.setText（“0”）；
}
if（codigo.getText（）.toString（）.equals（“”）{
Toast.makeText（MainActivity.this，““Error！”“introduction un código！”，Toast.LENGTH_SHORT.show（）；
}else if（codigo.getText（）.toString（）.length（）！=15和&codigo.getText（）.toString（）.length（）！=13）{
Toast.makeText（MainActivity.this，““Error！”介绍uncódigoválido！”，Toast.LENGTH_SHORT.show（）；
}否则{
字符串msg=null；
//每个子串中都有一个单独的子串
idMaterial=codigoS.子串（2,3）；
idDiametro=codigoS.子串（3,7）；
idAncho=codigoS.子串（7,11）；
idGama=codigoS.子串（11）；
试一试{
Connection con=connectionClass.CONN（）；
如果（con==null）{
Toast.makeText（MainActivity.this，“NO SE HA CONECTADO A LA BD！”，Toast.LENGTH_SHORT.show（）；
msg=“与SQL server连接时出错”；
}否则{
String query=“从物料中选择valor，其中id=”+idMaterial+”；
语句stmt=con.createStatement（）；
ResultSet rs=stmt.executeQuery（查询）；
如果（rs.next（））{
material.setText（rs.getString（1））；
}否则{
Toast.makeText（MainActivity.this，“无任何内容！”，Toast.LENGTH\u SHORT.show（）；
可见=假；
}
query=“从DIAMETRO中选择valor，其中id=”+idDiametro+”；
stmt=con.createStatement（）；
rs=stmt.executeQuery（查询）；
如果（rs.next（））{
diametro.setText（rs.getString（1））；
}否则{
Toast.makeText（MainActivity.this，“NO HA ENCONTRADO EL DIAMETRO！”，Toast.LENGTH_SHORT.show（）；
可见=假；
}
query=“从ANCHO中选择valor，其中id=”+idAncho+”；
stmt=con.createStatement（）；
rs=stmt.executeQuery（查询）；
如果（rs.next（））{
ancho.setText（rs.getString（1））；
}否则{
Toast.makeText（MainActivity.this，““不要再来了！”，Toast.LENGTH\u SHORT.show（）；
可见=假；
}
query=“从GAMA中选择valor，其中id=”+idGama+”；
stmt=con.createStatement（）；
rs=stmt.executeQuery（查询）；
如果（rs.next（））{
gama.setText（rs.getString（1））；
}否则{
Toast.makeText（MainActivity.this，““不，不，不，不，不，不”，Toast.LENGTH\u SHORT）.show（）；
可见=假；
}
如果（可见==真）{
layoutMuestra.setVisibility（View.VISIBLE）；
}
}
import android.annotation.SuppressLint;
import android.os.StrictMode;
import android.util.Log;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class ConnectionClass {
String ip = "192.168.**.**:1433";
String classs = "net.sourceforge.jtds.jdbc.Driver";
String db = "bd****";
String un = "**";
String password = "******";
@SuppressLint("NewApi")
public Connection CONN() {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
Connection conn = null;
String ConnURL = null;
try {
Class.forName(classs);
ConnURL = "jdbc:jtds:sqlserver://" + ip + ";" + "databaseName=" + db + ";user=" + un + ";password="
+ password + ";";
conn = DriverManager.getConnection(ConnURL);
} catch (SQLException se) {
Log.e("ERRO", se.getMessage());
} catch (ClassNotFoundException e) {
Log.e("ERRO", e.getMessage());
} catch (Exception e) {
Log.e("ERRO", e.getMessage());
}
return conn;
}
}
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
public class MainActivity extends AppCompatActivity {
private String idDiametro, idMaterial, idAncho, idGama;
private String codigoS;
private LinearLayout layoutMuestra;
private TextView material, diametro, ancho, gama;
private Spinner spinnerBox;
private String[] arrayBox;
private EditText codigo, cantidad;
private ConnectionClass connectionClass;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
layoutMuestra = (LinearLayout) findViewById(R.id.layoutMuestra);
spinnerBox = (Spinner) findViewById(R.id.spinnerBox);
arrayBox = getResources().getStringArray(R.array.arrayBox);
codigo = (EditText) findViewById(R.id.editCodigo);
connectionClass = new ConnectionClass();
material = (TextView) findViewById(R.id.lblMaterial);
diametro = (TextView) findViewById(R.id.lblDiametro);
ancho = (TextView) findViewById(R.id.lblAncho);
gama = (TextView) findViewById(R.id.lblGama);
cantidad = (EditText) findViewById(R.id.editCantidad);
Toast.makeText(MainActivity.this, "¡LA PRUEBA BUENA!", Toast.LENGTH_SHORT).show();
ArrayAdapter <CharSequence> adaptador = ArrayAdapter.createFromResource(this, R.array.arrayBox, android.R.layout.simple_spinner_dropdown_item);
spinnerBox.setAdapter(adaptador);
codigo.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
if (codigo.getText().toString().equals("")) {
layoutMuestra.setVisibility(View.GONE);
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
if (codigo.getText().toString().equals("")) {
layoutMuestra.setVisibility(View.GONE);
}
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (codigo.getText().toString().equals("")) {
layoutMuestra.setVisibility(View.GONE);
}
}
});
}
public void onClickRegistrar(View v) {
Boolean visible = true;
codigoS = codigo.getText().toString();
if(cantidad.getText().toString().equals("")){
cantidad.setText("0");
}
if (codigo.getText().toString().equals("")) {
Toast.makeText(MainActivity.this, "¡Error! ¡Introduce un código!", Toast.LENGTH_SHORT).show();
} else if (codigo.getText().toString().length() != 15 && codigo.getText().toString().length() != 13){
Toast.makeText(MainActivity.this, "¡Error! ¡Introduce un código válido!", Toast.LENGTH_SHORT).show();
}else {
String msg = null;
//SEPARO EL CODIGO EN LOS RESPECTIVO SUBSTRINGS
idMaterial = codigoS.substring(2, 3);
idDiametro = codigoS.substring(3, 7);
idAncho = codigoS.substring(7, 11);
idGama = codigoS.substring(11);
try {
Connection con = connectionClass.CONN();
if (con == null) {
Toast.makeText(MainActivity.this, "¡NO SE HA CONECTADO A LA BD!", Toast.LENGTH_SHORT).show();
msg = "Error in connection with SQL server";
} else {
String query = "select valor from MATERIAL where id='" + idMaterial + "'";
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
if(rs.next()){
material.setText(rs.getString(1));
} else {
Toast.makeText(MainActivity.this, "¡NO HA ENCONTRADO EL MATERIAL!", Toast.LENGTH_SHORT).show();
visible = false;
}
query = "select valor from DIAMETRO where id='" + idDiametro + "'";
stmt = con.createStatement();
rs = stmt.executeQuery(query);
if(rs.next()){
diametro.setText(rs.getString(1));
} else {
Toast.makeText(MainActivity.this, "¡NO HA ENCONTRADO EL DIAMETRO!", Toast.LENGTH_SHORT).show();
visible = false;
}
query = "select valor from ANCHO where id='" + idAncho + "'";
stmt = con.createStatement();
rs = stmt.executeQuery(query);
if(rs.next()){
ancho.setText(rs.getString(1));
} else {
Toast.makeText(MainActivity.this, "¡NO HA ENCONTRADO EL ANCHO!", Toast.LENGTH_SHORT).show();
visible = false;
}
query = "select valor from GAMA where id='" + idGama + "'";
stmt = con.createStatement();
rs = stmt.executeQuery(query);
if(rs.next()){
gama.setText(rs.getString(1));
} else {
Toast.makeText(MainActivity.this, "¡NO HA ENCONTRADO LA GAMA!", Toast.LENGTH_SHORT).show();
visible = false;
}
if(visible == true){
layoutMuestra.setVisibility(View.VISIBLE);
}
}
} catch (Exception ex) {
msg = "Exceptions";
}
//GUARDAMOS LOS DATOS EN EL EXCEL
//OBTENGO LA CANTIDAD DE BOX Y DE UNIDADES
int cantBox = Integer.parseInt(arrayBox[spinnerBox.getSelectedItemPosition()]);
int cantUnidad = Integer.parseInt(cantidad.getText().toString());
}
}
}