Android studio getSlotFromBufferLocked:未知的缓冲区错误

I want to make a simple login and register app, so the user can create an account. (name, username, password) I use WAMP and a MYSQL database where I store the accounts.

我想做一个简单的登录和注册应用，这样用户就可以创建一个帐户。(姓名，用户名，密码)我使用WAMP和MYSQL数据库来存储账户。

When I fill in the user info on the registration form and click register I get the following error:

当我在注册表上填写用户信息并点击注册时，我得到以下错误:

09-14 09:30:39.864    2624-2638/com.example.appname.appname E/Surface﹕ getSlotFromBufferLocked: unknown buffer: 0xab7115e0
09-14 09:30:48.632    2624-2638/com.example.appname.appname E/Surface﹕ getSlotFromBufferLocked: unknown buffer: 0xab7125a0
09-14 09:30:51.940    2624-2638/com.example.appname.appname E/Surface﹕ getSlotFromBufferLocked: unknown buffer: 0xab7125a0

When I go check the database it didn't store the account.

当我去检查数据库时，它没有存储账户。

MainActivity.java

MainActivity.java

import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void userReg(View v)
    {
        startActivity(new Intent(this, Register.class));
    }
    public void userLogin(View view)
    {


    }


}

Register.java

Register.java

import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;

public class Register extends Activity {
    EditText ET_NAME,ET_USER_NAME,ET_USER_PASS;
    String name,user_name,user_pass;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.register_layout);
        ET_NAME = (EditText) findViewById(R.id.name);
        ET_USER_NAME = (EditText) findViewById(R.id.new_user_name);
        ET_USER_PASS = (EditText) findViewById(R.id.new_user_pass);
    }

    public void userReg(View view)
    {
        name = ET_NAME.getText().toString();
        user_name = ET_USER_NAME.getText().toString();
        user_pass = ET_USER_PASS.getText().toString();
        String method = "register";
        BackgroundTask backgroundTask = new BackgroundTask(Register.this);
        backgroundTask.execute(method,name,user_name,user_pass);
        finish();
    }
}

Backgroundtask.java

Backgroundtask.java

import android.app.AlertDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.widget.Toast;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;

public class BackgroundTask extends AsyncTask<String, Void, String> {
    AlertDialog alertDialog;
    Context ctx;

    BackgroundTask(Context ctx) {
        this.ctx = ctx;

    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected String doInBackground(String... params) {
        String reg_url = "http://10.0.2.2.2/webapp/register.php";
        String login_url = "http://10.0.2.2.2/webapp/login.php";
        String method = params[0];
        if (method.equals("register")) {
            String name = params[1];
            String user_name = params[2];
            String user_pass = params[3];
            try {
                URL url = new URL(reg_url);
                HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                httpURLConnection.setRequestMethod("POST");
                httpURLConnection.setDoOutput(true);
                OutputStream OS = httpURLConnection.getOutputStream();
                BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS, "UTF-8"));
                String data = URLEncoder.encode("user", "UTF-8") + "=" + URLEncoder.encode(name, "UTF-8") + "&" +
                        URLEncoder.encode("user_name", "UTF-8") + "=" + URLEncoder.encode(user_name, "UTF-8") + "&" +
                        URLEncoder.encode("user_pass", "UTF-8") + "=" + URLEncoder.encode(user_pass, "UTF-8");
                bufferedWriter.write(data);
                bufferedWriter.flush();
                bufferedWriter.close();
                OS.close();
                InputStream IS = httpURLConnection.getInputStream();
                IS.close();
                return "Registration Success...";
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }

    @Override
    protected void onProgressUpdate(Void... values) {
        super.onProgressUpdate(values);
    }

    @Override
    protected void onPostExecute(String result) {
        Toast.makeText(ctx, result, Toast.LENGTH_LONG).show();
    }
}

register.php

register.php

<?php
require "init.php";
$name = $_POST["user"];
$user_name = $_POST["user_name"];
$user_pass = $_POST["user_pass"];

$sql_query = "insert into user_info values('$name','$user_name','$user_pass');";

if(mysqli_query($con,$sql_query))
{
//echo"<h3> Data insertion success...</h3>";
}
else{
//echo "Data insertion error..".mysqli_error($con);
}



?>

init.php

init.php

<?php
$db_name="myDBname";
$mysql_user = "root";
$mysql_pass = "root";
$server_name="localhost";

$con = mysqli_connect($server_name,$mysql_user,$mysql_pass,$db_name);
if(!$con)
{
//echo"Connection Error".mysqli_connect_error();
}
else
{
//echo"<h3> Database connection success.....</h3>";
}


?>

6 个解决方案

#1

Edit:

This was a bug in Android that was fixed in later versions of Marshmallow

这是Android中的一个bug，在后来版本的棉花糖中得到了修复

Original:

I believe that this is Marshmallow specific. Are you using a Marshmallow device?

我认为这是一个特定的棉花糖。你使用的是棉花糖设备吗?

I've noticed this error is printed out every time I switch between applications (doesn't matter which) or exit out of them, and when activities are destroyed.

我注意到，每当我在应用程序之间切换(无论切换到哪个应用程序)或退出它们时，以及活动被破坏时，都会打印出这个错误。

I've tried running the same apps on two Nexus 5s - one running Lollipop and the other Marshmallow, and these log prints only appeared on the Marshmallow version - with every app, not just the one I'm building.

我试过在两款Nexus 5s上运行同样的应用——一款运行棒棒糖，另一款是棉花糖，这些日志打印只出现在棉花糖版本上——每个应用都有，而不仅仅是我正在构建的应用。

Not sure why this happens, but I opened a report here.

不知道为什么会这样，但我在这里打开了一个报告。

#2

I don't have specific problem's solution. But I had similar problem. Anyone who has problem like this please make sure you have below code.

我没有具体的问题解决方案。但我也有类似的问题。任何有类似问题的人请确保你有以下代码。

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.<YOUR_XML_FILE_NAME>);

by using intelligence you might have choose below code:

通过使用智能，您可以选择以下代码:

@Override
public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) {
    super.onCreate(savedInstanceState, persistentState);
    setContentView(R.layout.<YOUR_XML_FILE_NAME>);
}

This worked for me

这为我工作

For more info on PersistentState

有关PersistentState的更多信息

Happy coding :)

编码快乐:)

#3

I think you are finishing the context before backgrounTask finish, and Context you pass no longer exist.
You can try:

我认为您正在完成背景任务完成之前的上下文，并且您传递的上下文不再存在。你可以尝试:

• Use appContext : new BackgroundTask(Register.this.getApplicationContext());

  使用appContext: new BackgroundTask(Register.this.getApplicationContext());

• Or, Wait for BackgroundTask finish : remove finish() after .execute(...) and add finish() onPostExecute

  或者，等待后台任务完成:在.execute(…)之后删除finish()，并在postexecute上添加finish()

#4

Update your android OS to 6.0.1.

将你的android操作系统升级到6.0.1。

This was an open issue found here. The issue is fixed in Android 6.0.1 which was publicly released recently.

这是一个公开的问题。这个问题在最近发布的Android 6.0.1中得到了解决。

#5

It's quite strange but in my case i got this error when tried loading contacts without adding

这很奇怪，但在我的例子中，当我尝试加载联系人而不添加时，我得到了这个错误

<uses-permission android:name="android.permission.READ_CONTACTS" />

< uses-permission android:name = " android.permission。READ_CONTACTS " / >

into manifest. And it disappeared just I've done it.

到清单。它就这样消失了。

So my guess it's might be something with new permissions in Marshmallow.

我猜它可能是有新权限的棉花糖。

Tested on my Nexus 5 with Android 6.0 and with targetSdkVersion 23 in build.gradle

在我的Nexus 5上测试了Android 6.0，并在build.gradle中使用了targetSdkVersion 23。

#6

Since that android changed permissions request (some permissions like android.permission.READ_PHONE_STATE or android.permission.READ_CONTACTS), when you ask for these permissions at runtime and dont add the permission tag (<uses-permission android:name="..." />) in manifest, you will get the error.

由于android更改了权限请求(一些权限，如android.permission。READ_PHONE_STATE或android.permission.READ_CONTACTS)，当您在运行时请求这些权限时，不要添加权限标记( )在manifest中，你会得到错误。

So just use tag permissions like old versions and add request permission at runtime in newer versions.

因此，只需像旧版本那样使用标记权限，并在新版本的运行时添加请求权限。