Avoid try/catch on Android

Question

I am new in Android environment and I have started writing some code to execute some queries on a database. When I have to handle exceptions I don't know what the appropriate way is to do it - out of Android I used to use throws declaration on methods but it seems that throws isn't allowed in android? Just try-catch? I say this because eclipse doesn't suggest me adding throws declaration like when I am out of Android environment, I guess that it is related to extends Activity. So what is the appropriate way to handle exceptions in android? Surrounding every sentence with try-catch makes my code look terrible and that's not really what I want to do.

Answer 1

If the method you are using already throws an exception, you may want to just re-throw the exception as the new type:

public void someMethod() throws IOException {
    try {
        //  Do database operation
    } catch (MyException e){
        throw new IOException(e.toString());
    }
}

//  Or, if there is no exception, use an unchecked exception:

public void otherMethod() {
    try {
        // DB operation
    } catch (MyException e){
        throw new RuntimeException(e);
    }
}

The other option is to make MyException extend RuntimeException. Then the compiler won't force you to catch it or add it to the method signature. RuntimeExceptions are known as unchecked exceptions meaning you don't have to check for them occurring by way of a try/catch. Examples of these are NullPointer and ArrayOutOfBounds.