我正在尝试从服务器获取 HttpPost 结果并将其转换为字节数组，并从 byte[] 获取特定字节。现在我正在使用这段代码并且它正在工作。我需要把它改成我想做的。这是代码:
public class UserLogin extends Activity {
Button cancel,login;
HttpClient httpclient;
HttpPost httppost;
ArrayList<NameValuePair> postParameters;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
httpclient = new DefaultHttpClient();
httppost = new HttpPost("http://www.rpc.test.com");
postParameters = new ArrayList<NameValuePair>();
//postParameters.add(new BasicNameValuePair("new_auth_data","1"));
postParameters.add(new BasicNameValuePair("username_hash", "c34a6cf6bff9f6b61e96fdf4bf360157d522a17c"));
postParameters.add(new BasicNameValuePair("password_hash", "56dc55f0062cf21797637b0f8652293023f2ef22"));
cancel = (Button) findViewById(R.id.cancel_login_btn);
cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
login = (Button) findViewById(R.id.login_btn);
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
httppost.setEntity(new UrlEncodedFormEntity(postParameters));
HttpResponse response = httpclient.execute(httppost);
Log.d("Login", "Response " + response.getEntity());
String responseBody = EntityUtils.toString(response.getEntity());
byte[] b = responseBody.getBytes();
// here
new AlertDialog.Builder( UserLogin.this )
.setTitle( "Warning" )
.setMessage( responseBody )
.setPositiveButton( "Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Log.d("AlertDialog", "Positive");
}
})
.show();
} catch (Exception e) {
Log.d("ERROR"," Error lol - "+e);
}
}
});
}
}
作为此 HttpPost 的结果，我得到了一个字符串，我需要将其转换为字节，并从中获取特定的字节。比如从 15 元素开始到 25 或类似的东西。有什么建议吗？
提前感谢所有建议和帮助。
最佳答案
从数组中提取子数组是通过 arrayCopy http://developer.android.com/reference/java/lang/System.html#arraycopy%28java.lang.Object,%20int,%20java.lang.Object,%20int,%20int%29 完成的
对于元素 15 到 25:
byte[] subarray = new byte[25-15];
System.arrayCopy(b, 15, subarray, 0, subarray.length);
关于java - Android Java - 将 HttpPost 结果转换为 byte[]，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/7330948/