Question

我写了一些代码来将数据发送到服务器以存储在数据库中。我还使用wamp来创建语言环境服务器

这是我的MainActivity.java：

package com.example.jawad.sze;

public class MainActivity extends ActionBarActivity {
    EditText ed;
    Button asd;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ed = (EditText)findViewById(R.id.editText);
        asd=(Button)findViewById(R.id.button3);
        asd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


        StringRequest stringRequest = new StringRequest(Request.Method.POST, "http://192.168.1.105/sze/add_user.php", new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                Log.e("response",response);
                Toast.makeText(mainActivity.this, "onResponse", LENGTH_SHORT).show();
            }
        }, new Response.ErrorListener() {
           @Override
           public void onErrorResponse(VolleyError error) {
               Toast.makeText(mainActivity.this, "onErrorResponse", LENGTH_SHORT).show();
           }
       }){
           @Override
           protected Map<String, String> getParams() throws AuthFailureError {
                Map<String,String> map = new HashMap<>();
                map.put("name",ed.getText().toString());
                Toast.makeText(mainActivity.this, "Map", LENGTH_SHORT).show();
                return  map;
            }
        };
        Volley.newRequestQueue(getApplicationContext()).add(stringRequest);


    }


}

我的朋友：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.example.jawad.sze"
        minSdkVersion 18
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile  'com.mcxiaoke.volley:library:1.0.19'

}

记录错误：

05-26 22:56:28.354 4232-4495/com.example.jawad.sze E/Volley: [9108] NetworkDispatcher.run: Unhandled exception java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
               java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
                   at android.os.Handler.<init>(Handler.java:208)
                   at android.os.Handler.<init>(Handler.java:122)
                   at android.widget.Toast$TN.<init>(Toast.java:327)
                   at android.widget.Toast.<init>(Toast.java:92)
                   at android.widget.Toast.makeText(Toast.java:241)
                   at com.example.jawad.sze.MainActivity$1$3.getParams(MainActivity.java:59)
                   at com.android.volley.Request.getBody(Request.java:434)
                   at com.android.volley.toolbox.HurlStack.addBodyIfExists(HurlStack.java:260)
                   at com.android.volley.toolbox.HurlStack.setConnectionParametersForRequest(HurlStack.java:234)
                   at com.android.volley.toolbox.HurlStack.performRequest(HurlStack.java:107)
                   at com.android.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:96)
                   at com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:112)

这段代码以前工作得很完美，我曾经把文字放在EditText中点击按钮，打开phpMyAdmin并且字符串会在那里，但不再是我更新了Android工作室但是我不认为＆＃ 39;问题

Answer 1

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:21.0.3'
    'com.mcxiaoke.volley:library:1.0.19'

}

将我们的'com.mcxiaoke.volley:library:1.0.19'更改为以下

compile 'com.mcxiaoke.volley:library:1.0.19'

Answer 2

问题是Toast.makeText(mainActivity.this, "Map", LENGTH_SHORT).show();

中的行StringRequest#getParams()

调用它的方法似乎是在Volley管理的线程上调用的。据推测，该线程尚未启动，因此RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

有关从异步服务使用UI的方法，请参阅https://developer.android.com/training/multiple-threads/communicate-ui.html。在这样的线程上创建祝酒词根本不起作用。

在android项目中实现排球

2 个答案: