Cannot resolve symbol HttpGet,HttpClient,HttpResponce in Android Studio
Try this code:
final String ERROR = "my error message....";
private class DownloadWebPageTask extends AsyncTask<String, Void, String> {
// some code and method ..... see AsyncTask
@Override
protected String doInBackground(String... urls) {
URL urlL = null;
try {
urlL = new URL(url);//"//chmi.cz..../"
HttpURLConnection urlConnection = null;
try {
urlConnection = (HttpURLConnection) urlL.openConnection();
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
response = readStream(in);
return response;
} catch (IOException e) {
//throw new RuntimeException(e);
} finally {
if(urlConnection != null)
urlConnection.disconnect();
return ERROR;
}
} catch (MalformedURLException e) {
e.printStackTrace();
return ERROR;
}
}
return response;
}
private String readStream(InputStream is) {
try {
ByteArrayOutputStream bo = new ByteArrayOutputStream();
int i = is.read();
while(i != -1) {
bo.write(i);
i = is.read();
}
return bo.toString();
} catch (IOException e) {
return "";
}
}
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Samsung Galaxy S nejlepší cena od 4 500 KCZ Kč (únor.2012)
Samsung Galaxy S je chytrý telefon s operačním systémem Android.
Samsung Galaxy S je (22.února2012) 5. a 6. nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.
Samsung Galaxy S byl představen firmou Samsung v březnu 2010. Je vybaven 1 GHz ARM "Hummingbird - kolibřík" procesorem, 8-16 GB interní flash pamětí, 4-palcovým 480 × 800 pixelů Super AMOLED kapacitním dotykovým displejem, Wi-Fi připojením, 5-megapixelovým fotoaparátem s maximálním rozlišením 2560x1920 a u vybraných modelů předním čelním 0,3 MP fotoaparátem VGA (640x480).
Samsung Galaxy S photo pic image
Zdroj obrázku: wikipedia
Samsung Galaxy S je chytrý telefon s operačním systémem Android.
Samsung Galaxy S je (22.února2012) 5. a 6. nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.
Samsung Galaxy S byl představen firmou Samsung v březnu 2010. Je vybaven 1 GHz ARM "Hummingbird - kolibřík" procesorem, 8-16 GB interní flash pamětí, 4-palcovým 480 × 800 pixelů Super AMOLED kapacitním dotykovým displejem, Wi-Fi připojením, 5-megapixelovým fotoaparátem s maximálním rozlišením 2560x1920 a u vybraných modelů předním čelním 0,3 MP fotoaparátem VGA (640x480).
Samsung Galaxy S photo pic image

Zdroj obrázku: wikipedia
Eclipse Navigation Shortcuts.
Keyboard_shortcuts_(3.0).pdf
Ctrl+1 Quick fix problem
Ctrl+O Quick Outline
Ctrl+Shift+G Find references in workspace
Ctrl+Shift+U Find all references in file
Ctrl+Shift+T Find Java Typ
[caption id="attachment_1214" align="alignleft" width="150" caption="eclipse-ctrl-shift-t"]
[/caption]
Ctrl+Shift+R Find Resource
Ctrl+E Open Editor Drop-Down
Ctrl+Space Content Assist
Ctrl+Shift+Space Context Information
F3 Open Declaration of variable
F4 Open Type Hierarchy
Ctrl+H Open Search Dialog
Alt+Shift+R Rename - Refactoring
Alt+Shift+M Extract Method
Alt+Shift+L Extract Local Variable
Alt Shift Up Expand selection to enclosing element
Alt Shift Right Expand selection to next element
Alt Shift Left Expand selection to previous element
Alt Shift Down Restore previous selection
Breakpoints Shift+Alt+Q B
Cheat Sheets Shift+Alt+Q H
Console Shift+Alt+Q C
Java Declaration Shift+Alt+Q D
Java Package Explorer Shift+Alt+Q P
Java Type Hierarchy Shift+Alt+Q T
Javadoc Shift+Alt+Q J
Search Shift+Alt+Q S
Show View (View: Outline)Shift+Alt+Q O
Show View (View: Problems)Shift+Alt+Q X
Synchronize Shift+Alt+Q Y
Variables Shift+Alt+Q V

Keyboard_shortcuts_(3.0).pdf
Ctrl+1 Quick fix problem

Ctrl+O Quick Outline

Ctrl+Shift+G Find references in workspace
Ctrl+Shift+U Find all references in file

Ctrl+Shift+T Find Java Typ
[caption id="attachment_1214" align="alignleft" width="150" caption="eclipse-ctrl-shift-t"]

Ctrl+Shift+R Find Resource

Ctrl+E Open Editor Drop-Down
Ctrl+Space Content Assist

Ctrl+Shift+Space Context Information

F3 Open Declaration of variable
F4 Open Type Hierarchy
Ctrl+H Open Search Dialog
Alt+Shift+R Rename - Refactoring
Alt+Shift+M Extract Method
Alt+Shift+L Extract Local Variable
Alt Shift Up Expand selection to enclosing element
Alt Shift Right Expand selection to next element
Alt Shift Left Expand selection to previous element
Alt Shift Down Restore previous selection
Breakpoints Shift+Alt+Q B
Cheat Sheets Shift+Alt+Q H
Console Shift+Alt+Q C
Java Declaration Shift+Alt+Q D
Java Package Explorer Shift+Alt+Q P
Java Type Hierarchy Shift+Alt+Q T
Javadoc Shift+Alt+Q J
Search Shift+Alt+Q S
Show View (View: Outline)Shift+Alt+Q O
Show View (View: Problems)Shift+Alt+Q X
Synchronize Shift+Alt+Q Y
Variables Shift+Alt+Q V

Invalid proguard configuration file path
C:\documents\my_android_projects\my_project\proguard.cfg does not exist or is not a regular file
Solution:
Check if exist file proguard.cfg in your project on the path C:\docum.........
If not exist, copy a file proguard.cfg from other project or create file proguard.cfg and insert
this source code to file and save this file.
From more details see:
//developer.android.com/guide/developing/tools/proguard.html
C:\documents\my_android_projects\my_project\proguard.cfg does not exist or is not a regular file
Solution:
Check if exist file proguard.cfg in your project on the path C:\docum.........
If not exist, copy a file proguard.cfg from other project or create file proguard.cfg and insert
this source code to file and save this file.
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
-keepclasseswithmembernames class * {
native <methods>;
}
-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet, int);
}
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator *;
}
From more details see:
//developer.android.com/guide/developing/tools/proguard.html
Generate random number Android Java example source code.
Random rand = new Random();
int i = rand.nextInt() % 256; // range -255 +255
System.out.print(i + "
"); // -184
i = Math.abs(rand.nextInt() % 12); // range 0 +11
System.out.print(i); // 7
// Math.random() start with 0. e.g. 0.35981234
int nRan = (int) (Math.random()*10); // 0 - 10
// nextDouble(), nextFloat(), nextInt(), nextLong() returns 0 - 10
import java.util.Random;´
Random r = new Random();
int nRan = r.nextInt(); // 0 - 10
double dRan = r.nextDouble() * 10; // e.g. 7.496285271597397
nextDouble – return 0 - 1
nextFloat – same as double
nextInt – -2147483648 +2147483647
nextLong – -922337203685775808 +9223372036854775807
nextGaussian – 0.0 aberation 1.0.
String sFileContent = readFile("myfile.txt",StandardCharsets.UTF_8);
static String readFile(String path, Charset encoding)
throws IOException
{
byte[] encoded = Files.readAllBytes(Paths.get(path));
return encoding.decode(ByteBuffer.wrap(encoded)).toString();
}
// write file
String sOut = "text blah hello world etc.";
writeToFile(sOut"someName.txt");
static void writeToFile(String sB,String name) {
String folder = ("c:\\folder\");
File f = new File(folder+ name);
BufferedWriter writer = null;
writer = new BufferedWriter( new OutputStreamWriter(
new FileOutputStream( folder+name),"UTF-8"));
writer.write( sB);
if ( writer != null)
writer.close( );
}
Editace: 2015-12-10 19:13:01
Počet článků v kategorii: 396
Url:cannot-resolve-symbol-httpgethttpclienthttpresponce-in-android-studio