我正在尝试将编辑文本中的数据插入实时数据库，但当我按下应该发送数据的按钮时，应用程序崩溃了。
public class MainActivity extends Activity {
Button add_btn,view_btn;
TextView txt;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
add_btn=(Button)findViewById(R.id.add_btn);
view_btn=(Button)findViewById(R.id.view_btn);
txt=(TextView)findViewById(R.id.textView1);
ConnectivityManager connectivityManager=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo=connectivityManager.getActiveNetworkInfo();
if(networkInfo!=null && networkInfo.isConnected()){
txt.setVisibility(View.INVISIBLE);
}
else
{
add_btn.setEnabled(false);
view_btn.setEnabled(false);
txt.setVisibility(View.VISIBLE);
}
}
public void add_user(View view){
startActivity(new Intent(this,Add_user.class));
}
public void view_user(View view){
}
}
public class Add_user extends Activity {
EditText name,username,pass;
Button add_user;
String name1,username1,pass1,method;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_user);
name=(EditText)findViewById(R.id.username);
username=(EditText)findViewById(R.id.name);
pass=(EditText)findViewById(R.id.pass);
add_user=(Button)findViewById(R.id.button1);
}
public void add(View view){
name1=name.getText().toString();
username1=username.getText().toString();
pass1=pass.getText().toString();
BackgroundTask backgroundTask=new BackgroundTask();
backgroundTask.execute(name1,username1,pass1);
finish();
}
class BackgroundTask extends AsyncTask<String, Void, String> {
String url;
@Override
protected void onPreExecute() {
url="http://douxtoile.com/add_user.php";
Toast.makeText(getApplicationContext(), url,Toast.LENGTH_LONG).show();
}
@Override
protected String doInBackground(String... params) {
String name=params[1];
String username=params[2];
String pass=params[3];
Toast.makeText(getApplicationContext(), name+""+username+""+pass,Toast.LENGTH_LONG).show();
try {
URL url1=new URL(url);
HttpsURLConnection httpsURLConnection=(HttpsURLConnection)url1.openConnection();
httpsURLConnection.setRequestMethod("POST");
httpsURLConnection.setDoOutput(true);
OutputStream os=httpsURLConnection.getOutputStream();
BufferedWriter bufferedWriter=new BufferedWriter(new OutputStreamWriter(os,"UTF-8"));
String data=URLEncoder.encode("user","UTF-8")+"="+URLEncoder.encode(name,"UTF-8")+"&"+
URLEncoder.encode("username","UTF-8")+"="+URLEncoder.encode(username,"UTF-8")+"&"+
URLEncoder.encode("pass","UTF-8")+"="+URLEncoder.encode(pass,"UTF-8");
bufferedWriter.write(data);
bufferedWriter.flush();
bufferedWriter.close();
os.close();
InputStream is=httpsURLConnection.getInputStream();
is.close();
httpsURLConnection.disconnect();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch(NullPointerException e){
Toast.makeText(getApplicationContext(), e.toString(), 0).show();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "Success";
}
@Override
protected void onProgressUpdate(Void... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), result, Toast.LENGTH_LONG).show();
}
}
}
这是我的错误日志。
Stacktrace:
03-07 16:05:34.324: E/AndroidRuntime(24090): FATAL EXCEPTION: AsyncTask #2
03-07 16:05:34.324: E/AndroidRuntime(24090): Process: com.example.demo_online_db, PID: 24090
03-07 16:05:34.324: E/AndroidRuntime(24090): java.lang.RuntimeException: An error occured while executing doInBackground()
03-07 16:05:34.324: E/AndroidRuntime(24090): at android.os.AsyncTask$3.done(AsyncTask.java:300)
03-07 16:05:34.324: E/AndroidRuntime(24090): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
03-07 16:05:34.324: E/AndroidRuntime(24090): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
03-07 16:05:34.324: E/AndroidRuntime(24090): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
03-07 16:05:34.324: E/AndroidRuntime(24090): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
03-07 16:05:34.324: E/AndroidRuntime(24090): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
03-07 16:05:34.324: E/AndroidRuntime(24090): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
03-07 16:05:34.324: E/AndroidRuntime(24090): at java.lang.Thread.run(Thread.java:818)
03-07 16:05:34.324: E/AndroidRuntime(24090): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=3; index=3
03-07 16:05:34.324: E/AndroidRuntime(24090): at com.example.demo_online_db.Add_user$BackgroundTask.doInBackground(Add_user.java:54)
03-07 16:05:34.324: E/AndroidRuntime(24090): at com.example.demo_online_db.Add_user$BackgroundTask.doInBackground(Add_user.java:1)
03-07 16:05:34.324: E/AndroidRuntime(24090): at android.os.AsyncTask$2.call(AsyncTask.java:288)
03-07 16:05:34.324: E/AndroidRuntime(24090): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
03-07 16:05:34.324: E/AndroidRuntime(24090): ... 4 more
03-07 16:05:35.985: E/OpenGLRenderer(24090): SFEffectCache:clear(), mSize = 0
我没有包含任何外部 jar ，实际上我对此很陌生，所以不知道我这样做的方式是正确还是错误。 PHP 脚本很好，我已经静态测试过它。
最佳答案
以这种方式获取字符串值...
String name=params[0];
String username=params[1];
String pass=params[2];
关于php - Android 将数据插入实时 mysql 数据库，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42646747/