我正在寻找一个使用 php 和一个真正有效的远程数据库登录和注册 android 应用程序的示例。你能帮我吗？
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1 回答
3
Mkay... 我喜欢相信你并不懒惰。可能是我的失眠在捉弄我。
从这个假设开始，我将给您一个由 LoginActivity 和 LoginValidator 组成的示例。请使用它们作为示例并根据您的需要进行调整。尽管它们确实有效，但您可能需要在这里和那里进行调整以使其适合您当前的环境。
此外，在我的答案的底部，您会找到一个包含有用链接的列表。
登录活动.java
import java.util.concurrent.ExecutionException;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import com.example.android.yourappname.R;
import com.example.android.yourappname.LoginValidator;
import com.example.android.yourappname.SavedValues; // key value pairs... used for saving the state of the Activity
public class LoginActivity extends Activity {
public EditText usr;
public EditText pass;
final Context context = this;
private TextView loginButton;
private Boolean justCreated = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login_activity);
initLoginButton();
initEditTexts();
addSwipeGesture();
justCreated = true;
}
@Override
public void onPause()
{
super.onPause();
Log.v("Login", "onPause");
SavedValues.setLoginUser(usr.getText().toString());
SavedValues.setLoginPassword(pass.getText().toString());
justCreated = false;
}
@Override
public void onResume()
{
super.onResume();
Log.v("Login", "onResume");
if (justCreated == true) //if the user recreated the activity, restore the login values from the previous instance
{
usr.setText(SavedValues.getLoginUser(), TextView.BufferType.EDITABLE);
pass.setText(SavedValues.getLoginPassword(), TextView.BufferType.EDITABLE);
usr.setSelection(usr.getText().length());
}
else //if the user only left the activity clear the login values
{
usr.setText("", TextView.BufferType.EDITABLE);
pass.setText("", TextView.BufferType.EDITABLE);
}
}
private void initLoginButton()
{
loginButton = (TextView) findViewById(R.id.btnLogin);
loginButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
onLoginClick();
}
});
deactivateLoginButton();//the login button will be activated after the user types something in the user name field
}
private void initEditTexts()
{
usr = (EditText) findViewById(R.id.usr);
pass = (EditText) findViewById(R.id.pass);
//set the focus on the user's editText
usr.setFocusable(true);
usr.setFocusableInTouchMode(true);
usr.requestFocus();
usr.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void afterTextChanged(Editable s) {
if(usr.length() == 0)
{
deactivateLoginButton();
}
else
{
activateLoginButton();
}
}
});
//set the login values from saved data
usr.setText(SavedValues.getLoginUser(), TextView.BufferType.EDITABLE);
pass.setText(SavedValues.getLoginPassword(), TextView.BufferType.EDITABLE);
}
private void addSwipeGesture()
{
View root = findViewById(android.R.id.content).getRootView();
root.setOnTouchListener(new OnSwipeTouchListener(){
public boolean onSwipeLeft() {
onLoginClick();
return true;
}
});
}
private void deactivateLoginButton()
{
loginButton.setVisibility(View.INVISIBLE);
loginButton.setClickable(false);
}
private void activateLoginButton()
{
if (loginButton.getVisibility() != View.VISIBLE)
{
loginButton.setVisibility(View.VISIBLE);
loginButton.setClickable(true);
}
}
private void onLoginClick()
{
// Attempting Login
// test U + P + MAC
/*
* // testing MAC address WifiManager manager = (WifiManager)
* getSystemService(Context.WIFI_SERVICE); WifiInfo wifiInfo =
* manager.getConnectionInfo(); String MACAddress =
* wifiInfo.getMacAddress();
*/
String user = usr.getText().toString();
String password = pass.getText().toString();
if (!isOnline()) {
alert("Must be connected to network!");
} else {
LoginValidator logval = new LoginValidator();
Boolean validity = false;
try {
validity = (Boolean) logval.execute(user, password).get();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (validity) {
Intent i = new Intent(getApplicationContext(), GMC_MainActivity.class);
startActivity(i);
} else {
alert("Invalid username or password");
}
}
}
public boolean isOnline() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
if (netInfo != null && netInfo.isConnectedOrConnecting())
{
return true;
}
return false;
}
public void alert(String s) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
// set title
alertDialogBuilder.setTitle(s);
alertDialogBuilder.setCancelable(false).setNeutralButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, just close the
// dialog
// box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
}
登录验证器.java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import android.os.AsyncTask;
public class LoginValidator extends AsyncTask<String, Void, Boolean> {
Connection conn = null;
private String jdbcURL = ""; // URL for your database... IP, port etc.
private String user = ""; // Username for your DB
private String passwd = ""; // Password for your DB
@Override
protected Boolean doInBackground(String... arg0) {
String username = arg0[0];
String password = arg0[1];
Boolean v = false;
ResultSet rs = null;
Statement stmt = null;
try {
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); // I use an oracle DB addapt this to your own DB
conn = DriverManager.getConnection(jdbcURL, user, passwd);
try {
stmt = conn.createStatement();
try {
rs = stmt
.executeQuery("SELECT * FROM ts_v4_res.user_t WHERE user_name='"
+ username + "'" /*+" AND pass_word='" +password+"'"*/);
if (rs.next()) {
String p=rs.getString("pass_word");
if (p==null){
if(password.equals(""))
v = true;}
else
if(p.equals(password))
v=true;
}
} finally {
try {
rs.close();
} catch (Throwable ignore) {
}
}
} finally {
try {
stmt.close();
} catch (Throwable ignore) {
}
}
} catch (java.sql.SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (java.lang.ClassCastException e) {
e.printStackTrace();
}
return v;
}
}
带有示例的有用链接（其中很多）：
如何从 mysql 数据库连接登录到我的 android 应用程序
希望这会让你开始。
干杯
于 2013-03-24T23:40:34.610 回答