我在将 String 转换为 UTF-8 时遇到问题。
我尝试了这些转换方法，但结果不正确:
String fname = new String(_fnameText.getText().toString().getBytes(UTF8));String fname = URLEncoder.encode(_fnameText.getText().toString(),"UTF8");
第一个结果如下:?????? ??????
第二个的结果如下:%30%D%40.....
如何将字符串转换为UTF-8？
这是我的代码:
public void signup() {
String name;
String fname;
String lname;
String password;
final Charset UTF8=Charset.forName("utf-8");
name = new String();
fname = new String(_fnameText.getText().toString().getBytes(UTF8));
lname = new String(_lnameText.getText().toString().getBytes(UTF8));
password = new String(_passwordText.getText().toString().getBytes(UTF8));
// TODO: Implement your own signup logic here.
if(name!=null && fname!=null && lname!=null && password!=null) {
if (isConnected()) {
if (validate()) {
_signupButton.setEnabled(false);
jsonSignup = new JSON_Signup(SignupActivity.this, "http://teroject.com/api/android.php", name, password);
jsonSignup.valuesForServer.add(new BasicNameValuePair("api_key", "teroapi_php_java_1395"));
jsonSignup.valuesForServer.add(new BasicNameValuePair("api_function", "register"));
jsonSignup.valuesForServer.add(new BasicNameValuePair("username", name));
jsonSignup.valuesForServer.add(new BasicNameValuePair("password", password));
jsonSignup.valuesForServer.add(new BasicNameValuePair("fname", fname));
jsonSignup.valuesForServer.add(new BasicNameValuePair("lname", lname));
jsonSignup.execute();
}
}
}else {
Toast.makeText(getApplicationContext(),"لطفا از کاراکتر های مجاز استفاده کنید",Toast.LENGTH_SHORT).show();
}
}
public JSON_Signup(Context context,String url,String username,String password){
this.context=context;
this.url=url;
this.username=username;
this.password=password;
progressDialog=new ProgressDialog(this.context);
}
@Override
protected void onPreExecute() {
progressDialog.setMessage("در حال ثبت نام لطفا صبر کنید....");
progressDialog.show();
progressDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
public void onCancel(DialogInterface arg0) {
JSON_Signup.this.cancel(true);
}
});
}
@Override
protected String doInBackground(String... params) {
try {
// Set up HTTP post
// HttpClient is more then less deprecated. Need to change to URLConnection
HttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, 20000);
HttpConnectionParams.setSoTimeout(httpParameters, 20000);
DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(valuesForServer));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
StatusLine statusLine = httpResponse.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
// Read content & Log
inputStream = httpEntity.getContent();
}else{
return null;
}
}catch (NetworkOnMainThreadException e7){
Log.i("Network on Main Thread", e7 + "");
e7.printStackTrace();
return null;
} catch(SocketTimeoutException e6){
Log.i("Connection Timeout", e6 + "");
e6.printStackTrace();
return null;
} catch (UnsupportedEncodingException e1) {
Log.i("Unsupported Encoding",e1+"");
e1.printStackTrace();
return null;
} catch (ClientProtocolException e2) {
Log.i("Client Protocol", e2 + "");
e2.printStackTrace();
return null;
} catch (IllegalStateException e3) {
Log.i("Illegal State", e3 + "");
e3.printStackTrace();
return null;
} catch (IOException e4) {
Log.i("Exception", e4 + "");
e4.printStackTrace();
return null;
}
// Convert response to string using String Builder
if(inputStream!=null) {
try {
BufferedReader bReader = new BufferedReader(new InputStreamReader(inputStream, "utf-8"), 8);
StringBuilder sBuilder = new StringBuilder();
String line = null;
while ((line = bReader.readLine()) != null) {
sBuilder.append(line + "\n");
}
inputStream.close();
result = sBuilder.toString();
} catch (Exception e) {
Log.i("Exception", e + "");
return null;
}
}else {
return null;
}
return result;
}
@Override
protected void onPostExecute(String result) {
if (result != null) {
//parse JSON data
try {
mainFile = new JSONObject(result);
success = mainFile.getString("success");
message = mainFile.getString("message");
if (success.equals("1")) {
_signupButton.setEnabled(true);
Toast.makeText(this.context, message, Toast.LENGTH_LONG).show();
if (isConnected()) {
JSON json;
json = new JSON(this.context, "http://teroject.com/api/android.php",
this.username,this.password);
json.valuesForServer.add(new BasicNameValuePair("api_key", "teroapi_php_java_1395"));
json.valuesForServer.add(new BasicNameValuePair("api_function", "login"));
json.valuesForServer.add(new BasicNameValuePair("username",this.username));
json.valuesForServer.add(new BasicNameValuePair("password",this.password));
json.execute();
}
} else if (success.equals("0")) {
Toast.makeText(this.context, message, Toast.LENGTH_LONG).show();
_signupButton.setEnabled(true);
}
this.progressDialog.dismiss();
} catch (JSONException e) {
Toast.makeText(this.context, e + "", Toast.LENGTH_SHORT).show();
_signupButton.setEnabled(true);
this.progressDialog.dismiss();
}
}else {
_signupButton.setEnabled(true);
progressDialog.dismiss();
Toast.makeText(this.context,"خطا در برقراری ارتباط",Toast.LENGTH_LONG).show();
}
}
}
这是日志:
08-02 01:22:59.185 1108-1159/? E/ActivityManager: Invalid thumbnail dimensions: 384x384
08-02 01:22:59.445 15868-15868/? E/chromium: [ERROR:layer_tree_host_impl.cc(2218)] Forcing zero-copy tile initialization as worker context is missing
08-02 01:23:00.349 271-822/? E/BandwidthController: [LG DATA] No such appUid: 10044
08-02 01:23:00.767 275-1078/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:00.767 275-1078/? E/audio_hw_primary: enable_snd_device: enter 2
08-02 01:23:01.683 30716-30716/? E/MusicBrowser: [MusicUtils.java:633:getSmartShareVersion()] oooooo getSmartShareVersion ERROR :: android.content.pm.PackageManager$NameNotFoundException: com.lge.smartshare
08-02 01:23:02.445 32207-32207/? E/LGDMClient: [DmNotiService.java] [onCreate()] : [153] : DmNotiService.onCreate()
08-02 01:23:03.971 275-1324/? E/audio_hw_primary: disable_snd_device: enter 2
08-02 01:23:13.001 32587-32587/com.teroject.teroject E/GMPM: GoogleService failed to initialize, status: 10, Missing an expected resource: 'R.string.google_app_id' for initializing Google services. Possible causes are missing google-services.json or com.google.gms.google-services gradle plugin.
08-02 01:23:13.001 32587-32587/com.teroject.teroject E/GMPM: Scheduler not set. Not logging error/warn.
08-02 01:23:13.042 32587-32616/com.teroject.teroject E/GMPM: Uploading is not possible. App measurement disabled
08-02 01:23:13.724 32587-32587/com.teroject.teroject E/MediaProfilesEx-JNI: register_com_lge_media_MediaProfilesEx
08-02 01:23:13.724 32587-32587/com.teroject.teroject E/MediaRecorderEx-JNI: register_com_lge_media_MediaRecorderEx
08-02 01:23:13.726 32587-32587/com.teroject.teroject E/SurfaceControlEx: register_com_lge_view_SurfaceControlEx
08-02 01:23:13.736 32587-32587/com.teroject.teroject E/MediaPlayerEx-jni: register_com_lge_view_MediaPlayerEx
08-02 01:23:17.325 32587-32587/com.teroject.teroject E/CliptrayUtils: hideClipTrayIfNeeded() TextView is focused!! hideClipTray()
08-02 01:23:19.477 2636-2636/? E/NetworkScheduler.SR: Invalid parameter app
08-02 01:23:19.477 2636-2636/? E/NetworkScheduler.SR: Invalid package name : Perhaps you didn't include a PendingIntent in the extras?
08-02 01:23:19.579 2032-4467/? E/Drive.UninstallOperation: Package still installed com.teroject.teroject
08-02 01:23:21.148 275-1078/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:21.148 275-1078/? E/audio_hw_primary: enable_snd_device: enter 2
08-02 01:23:21.577 409-409/? E/Finsky: [1] com.google.android.finsky.wear.bo.a(837): onConnectionFailed: ConnectionResult{statusCode=API_UNAVAILABLE, resolution=null, message=null}
08-02 01:23:22.539 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:23.112 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:23.293 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:24.199 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:24.565 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:24.954 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:25.744 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:26.073 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:26.273 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:26.714 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:28.023 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:28.259 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:28.445 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:28.638 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:28.835 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:29.042 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:29.275 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:29.739 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:30.509 2032-905/? E/IntentOperationSvc: Failed to instantiate Chimera operation impl, dropping operation
08-02 01:23:30.583 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:30.658 32587-32587/com.teroject.teroject E/View: hasTransientState decremented below 0: unmatched pair of setHasTransientState calls
08-02 01:23:32.265 914-914/? E/Finsky: [1] com.google.android.finsky.wear.bo.a(837): onConnectionFailed: ConnectionResult{statusCode=API_UNAVAILABLE, resolution=null, message=null}
08-02 01:23:32.958 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:33.229 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:33.823 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:34.129 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:34.336 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:34.387 2636-2636/? E/NetworkScheduler.SR: Invalid parameter app
08-02 01:23:34.387 2636-2636/? E/NetworkScheduler.SR: Invalid package name : Perhaps you didn't include a PendingIntent in the extras?
08-02 01:23:34.662 1186-1186/? E/App: [App][onCreate()] 4.40.21
08-02 01:23:34.785 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:36.379 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:36.488 32587-32587/com.teroject.teroject E/View: hasTransientState decremented below 0: unmatched pair of setHasTransientState calls
08-02 01:23:37.519 1310-1310/? E/LGDMClient: [DmNotiService.java] [onCreate()] : [153] : DmNotiService.onCreate()
08-02 01:23:37.600 271-822/? E/BandwidthController: [LG DATA] No such appUid: 10100
08-02 01:23:37.832 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:38.623 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:38.972 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:39.463 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:39.810 1310-1310/? E/LGDMClient: [DmNotiService.java] [onCreate()] : [153] : DmNotiService.onCreate()
08-02 01:23:40.283 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:40.548 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:40.749 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:41.392 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:42.272 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:42.368 32587-32587/com.teroject.teroject E/View: hasTransientState decremented below 0: unmatched pair of setHasTransientState calls
08-02 01:23:42.509 1228-1228/? E/ActivityThread: Failed to find provider info for com.facebook.katana.provider.AttributionIdProvider
08-02 01:23:42.537 1228-1267/? E/ActivityThread: Failed to find provider info for com.facebook.katana.provider.AttributionIdProvider
08-02 01:23:42.642 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:42.922 271-822/? E/BandwidthController: [LG DATA] No such appUid: 10101
08-02 01:23:42.942 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:43.205 271-822/? E/BandwidthController: [LG DATA] No such appUid: 10101
08-02 01:23:43.435 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:44.025 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:44.285 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:44.495 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:45.733 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:46.999 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:23:47.101 32587-32587/com.teroject.teroject E/View: hasTransientState decremented below 0: unmatched pair of setHasTransientState calls
08-02 01:23:47.967 1566-1566/? E/Finsky: [1] com.google.android.finsky.wear.bo.a(837): onConnectionFailed: ConnectionResult{statusCode=API_UNAVAILABLE, resolution=null, message=null}
08-02 01:23:48.401 271-822/? E/BandwidthController: [LG DATA] No such appUid: 10151
08-02 01:23:48.469 32587-32587/com.teroject.teroject E/CliptrayUtils: hideClipTrayIfNeeded() TextView is focused!! hideClipTray()
08-02 01:23:50.138 275-1324/? E/audio_hw_primary: disable_snd_device: enter 2
08-02 01:23:54.695 1310-1310/? E/LGDMClient: [DmNotiService.java] [onCreate()] : [153] : DmNotiService.onCreate()
08-02 01:23:55.483 271-822/? E/BandwidthController: [LG DATA] No such appUid: 10151
08-02 01:24:00.979 1310-1310/? E/LGDMClient: [DmNotiService.java] [onCreate()] : [153] : DmNotiService.onCreate()
08-02 01:24:01.475 32587-32587/com.teroject.teroject E/OneSignal: You must initialize OneSignal before modifying tags! Omitting this tag operation.
08-02 01:24:02.643 32587-32587/com.teroject.teroject E/CliptrayUtils: hideClipTrayIfNeeded() TextView is focused!! hideClipTray()
08-02 01:24:04.019 2636-1894/? E/CommitToConfigurationOperation: Malformed snapshot token (size):
08-02 01:24:04.045 2636-1894/? E/CommitToConfigurationOperation: Malformed snapshot token (size):
08-02 01:24:04.079 2636-1894/? E/CommitToConfigurationOperation: Malformed snapshot token (size):
08-02 01:24:04.142 271-822/? E/BandwidthController: [LG DATA] No such appUid: 10004
08-02 01:24:04.408 275-1078/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:24:04.408 275-1078/? E/audio_hw_primary: enable_snd_device: enter 2
08-02 01:24:05.356 275-1324/? E/audio_hw_primary: select_devices: enter and usecase(1)
08-02 01:24:08.505 275-1324/? E/audio_hw_primary: disable_snd_device: enter 2
08-02 01:24:10.637 271-822/? E/BandwidthController: [LG DATA] No such appUid: 10151
最佳答案
将String转换为UTF-8的正确方法是单独调用getBytes():
byte[] fname = _fnameText.getText().toString().getBytes(UTF8);
你做得很好，但是你用这个输出做其他事情就不好了。
您的第一个示例是错误的，因为您正在使用 Java 的默认字符集将 UTF-8 字节转换回 String，而您的系统上显然不是 UTF-8。
您的第二个示例是错误的，因为您在 HTTP 逻辑的错误阶段手动对 UTF-8 字节进行 URL 编码。
您根本不应该将个人输入字符串转换为 UTF-8。根据需要构建 HTTP 请求值，然后在通过 HTTP 发布时让 UrlEncodedFormEntity 处理到 UTF-8 的转换。 UrlEncodedFormEntity() 有两个构造函数，其中之一采用 encoding 作为输入参数，但您没有使用该构造函数。
尝试更多类似这样的事情:
public void signup() {
String name = new String();
String fname = _fnameText.getText().toString();
String lname = _lnameText.getText().toString();
String password = _passwordText.getText().toString();
// TODO: Implement your own signup logic here.
if(name!=null && fname!=null && lname!=null && password!=null) {
if (isConnected()) {
if (validate()) {
_signupButton.setEnabled(false);
jsonSignup = new JSON_Signup(SignupActivity.this, "http://teroject.com/api/android.php", name, password);
jsonSignup.valuesForServer.add(new BasicNameValuePair("api_key", "teroapi_php_java_1395"));
jsonSignup.valuesForServer.add(new BasicNameValuePair("api_function", "register"));
jsonSignup.valuesForServer.add(new BasicNameValuePair("username", name));
jsonSignup.valuesForServer.add(new BasicNameValuePair("password", password));
jsonSignup.valuesForServer.add(new BasicNameValuePair("fname", fname));
jsonSignup.valuesForServer.add(new BasicNameValuePair("lname", lname));
jsonSignup.execute();
}
}
}else {
Toast.makeText(getApplicationContext(), "لطفا از کاراکتر های مجاز استفاده کنید", Toast.LENGTH_SHORT).show();
}
}
public JSON_Signup(Context context, String url, String username, String password){
this.context=context;
this.url=url;
this.username=username;
this.password=password;
valuesForServer=new List<BasicNameValuePair>();
progressDialog=new ProgressDialog(this.context);
}
@Override
protected void onPreExecute() {
progressDialog.setMessage("در حال ثبت نام لطفا صبر کنید....");
progressDialog.show();
progressDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
public void onCancel(DialogInterface arg0) {
JSON_Signup.this.cancel(true);
}
});
}
@Override
protected String doInBackground(String... params) {
try {
// Set up HTTP post
// HttpClient is more then less deprecated. Need to change to URLConnection
HttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, 20000);
HttpConnectionParams.setSoTimeout(httpParameters, 20000);
DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(valuesForServer, "utf-8"));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
StatusLine statusLine = httpResponse.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
// Read content & Log
inputStream = httpEntity.getContent();
}else{
return null;
}
}catch (NetworkOnMainThreadException e7){
Log.i("Network on Main Thread", e7 + "");
e7.printStackTrace();
return null;
} catch(SocketTimeoutException e6){
Log.i("Connection Timeout", e6 + "");
e6.printStackTrace();
return null;
} catch (UnsupportedEncodingException e1) {
Log.i("Unsupported Encoding",e1+"");
e1.printStackTrace();
return null;
} catch (ClientProtocolException e2) {
Log.i("Client Protocol", e2 + "");
e2.printStackTrace();
return null;
} catch (IllegalStateException e3) {
Log.i("Illegal State", e3 + "");
e3.printStackTrace();
return null;
} catch (IOException e4) {
Log.i("Exception", e4 + "");
e4.printStackTrace();
return null;
}
// Convert response to string using String Builder
if(inputStream!=null) {
try {
BufferedReader bReader = new BufferedReader(new InputStreamReader(inputStream, "utf-8"), 8);
StringBuilder sBuilder = new StringBuilder();
String line = null;
while ((line = bReader.readLine()) != null) {
sBuilder.append(line + "\n");
}
inputStream.close();
result = sBuilder.toString();
} catch (Exception e) {
Log.i("Exception", e + "");
return null;
}
}else {
return null;
}
return result;
}
@Override
protected void onPostExecute(String result) {
if (result != null) {
//parse JSON data
try {
mainFile = new JSONObject(result);
success = mainFile.getString("success");
message = mainFile.getString("message");
if (success.equals("1")) {
_signupButton.setEnabled(true);
Toast.makeText(this.context, message, Toast.LENGTH_LONG).show();
if (isConnected()) {
JSON json = new JSON(this.context, "http://teroject.com/api/android.php", this.username, this.password);
json.valuesForServer.add(new BasicNameValuePair("api_key", "teroapi_php_java_1395"));
json.valuesForServer.add(new BasicNameValuePair("api_function", "login"));
json.valuesForServer.add(new BasicNameValuePair("username", this.username));
json.valuesForServer.add(new BasicNameValuePair("password", this.password));
json.execute();
}
} else if (success.equals("0")) {
Toast.makeText(this.context, message, Toast.LENGTH_LONG).show();
_signupButton.setEnabled(true);
}
this.progressDialog.dismiss();
} catch (JSONException e) {
Toast.makeText(this.context, e + "", Toast.LENGTH_SHORT).show();
_signupButton.setEnabled(true);
this.progressDialog.dismiss();
}
}else {
_signupButton.setEnabled(true);
progressDialog.dismiss();
Toast.makeText(this.context,"خطا در برقراری ارتباط",Toast.LENGTH_LONG).show();
}
}
}
您没有显示 JSON.execute() 的代码，但概念是相同的。将 HTTP 值收集为普通 String 值，然后让 UrlEncodedFormEntity 在发布最终 HTTP 请求时将这些值转换为 UTF-8。
关于java - 在android中使用JSON将字符串编码为UTF-8，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38708023/