fuj*_*su4 5 android json request android-volley
我想在Android中发送一个简单的POST请求,其中一个正文等于:
[
{
"value": 1
}
]
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我尝试在Android中使用Volley库,这是我的代码:
// the jsonArray that I want to POST
String json = "[{\"value\": 1}]";
JSONArray jsonBody = null;
try {
jsonBody = new JSONArray(json);
} catch (JSONException e) {
e.printStackTrace();
}
final JSONArray finalJsonBody = jsonBody;
// starting the request
final RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
JsonObjectRequest request =
new JsonObjectRequest(com.android.volley.Request.Method.POST,"https://...",null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("mytag", "Response is: " + response);}},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d("Mytag", "error");}}) {
@Override
protected Map<String,String> getParams() {
// the problem is here...
return (Map<String, String>) finalJsonBody;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> params = new HashMap<String, String>();
// I put all my headers here like the following one :
params.put("Content-Type", "application/json");
return params;}};
queue.add(request);
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问题是getParams方法只接受Map对象,因为我想发送一个JSONArray.所以,我不得不使用一个演员,然后产生一个错误......
我不知道怎么解决这个问题谢谢
你可以参考我下面的示例代码:
更新您的 pastebin 链接:
因为服务器响应 a JSONArray,所以我使用JsonArrayRequest代替JsonObjectRequest。并且不再需要覆盖getBody。
mTextView = (TextView) findViewById(R.id.textView);
String url = "https://api.orange.com/datavenue/v1/datasources/2595aa553d3049f0b0f03fbaeaa7ddc7/streams/9fe5edb1c76e4968bdcc9c902010bc6c/values";
RequestQueue requestQueue = Volley.newRequestQueue(this);
final String jsonString = "[\n" +
" {\n" +
" \"value\": 1\n" +
" }\n" +
"]";
try {
JSONArray jsonArray = new JSONArray(jsonString);
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.POST, url, jsonArray, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
mTextView.setText(response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
mTextView.setText(error.toString());
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<>();
headers.put("X-OAPI-Key","TQEEGSk8OgWlhteL8S8siKao2q6LIGdq");
headers.put("X-ISS-Key","2b2dd0d9dbb54ef79b7ee978532bc823");
return headers;
}
};
requestQueue.add(jsonArrayRequest);
} catch (JSONException e) {
e.printStackTrace();
}
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我的代码适用于 Google 的官方 volley libray 和 mcxiaoke 的库
如果你想使用Google的库,在你 git clone 作为 Google 文档之后,将android文件夹从\src\main\java\com(你克隆的 Volley 项目)复制到\app\src\main\java\com你的项目中,如下图所示:
本build.gradle应包含以下
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.google.code.gson:gson:2.3.1'
}
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如果您的项目使用mcxiaoke的库,build.gradle它将如下所示(注意dependencies):
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.0"
defaultConfig {
applicationId "com.example.samplevolley"
minSdkVersion 16
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.0.0'
compile 'com.mcxiaoke.volley:library:1.0.17'
compile 'com.google.code.gson:gson:2.3'
}
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我建议你新建 2 个示例项目,一个使用Google的库,另一个使用mcxiaoke的库。
更新结束
String url = "http://...";
RequestQueue requestQueue = Volley.newRequestQueue(this);
final String jsonString = "[\n" +
" {\n" +
" \"value\": 1\n" +
" }\n" +
"]";
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
// do something...
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// do something...
}
}) {
@Override
public byte[] getBody() {
try {
return jsonString.getBytes(PROTOCOL_CHARSET);
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s",
jsonString, PROTOCOL_CHARSET);
return null;
}
}
};
requestQueue.add(jsonObjectRequest);
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