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Handler is abstract ,cannot be instantiated
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It seems you have imported a wrong Handler class
import java.util.logging.Handler;
Change it to
import android.os.Handler;
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java : convert float to String and String to float
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Using Java’s Float class.
float f = Float.parseFloat("25");
String s = Float.toString(25.0f);
To compare it's always better to convert the string to float and compare as two floats. This is because for one float number there a...
Reverse engineering from an APK file to a project
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There are two useful tools which will generate Java code (rough but good enough) from an unknown APK file.
Download dex2jar tool from dex2jar.
Use the tool to convert the APK file to JAR:
$ d2j-dex2jar.bat demo.apk
dex2jar demo.apk -> ./demo-dex2jar.jar
Once the JA...
Android and in TextView
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That works great. You can add that to xml or in java code. Work fine in java code, in xml I haven't tested to much, but it should do the job.
– Mikooos
Jul 4 '11 at 7:52
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What's the difference of strings within single or double quotes in groovy?
Is there any difference? Or just like javascript to let's input ' and " easier in strings?
2 Answers
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How do I copy an object in Java?
... do that, read at least what Joshua Bloch has to say about it in Effective Java.
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How to convert .pfx file to keystore with private key?
...wing two commands convert the pfx file to a format that can be opened as a Java PKCS12 key store:
openssl pkcs12 -in mypfxfile.pfx -out mypemfile.pem
openssl pkcs12 -export -in mypemfile.pem -out mykeystore.p12 -name "MyCert"
NOTE that the name provided in the second command is the alias of your...
Negative weights using Dijkstra's Algorithm
... good reference from Algorithm (4th edition), which says (and contains the java implementation of version 2 & 3 I mentioned above):
Q. Does Dijkstra's algorithm work with negative weights?
A. Yes and no. There are two shortest paths algorithms known as Dijkstra's algorithm, depending on whether...
Get item in the list in Scala?
...or (immutable) or ArrayBuffer (mutable) or possibly Array (which is just a Java array, except again you index into it with (i) instead of [i]).
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Square retrofit server mock for testing
...n the case if application is in DEBUG mode return given JSON.
RestClient.java
public final class RestClient {
private static IRestService mRestService = null;
public static IRestService getClient() {
if(mRestService == null) {
final OkHttpClient client = new OkHttpCl...