Question

I am working on Network based project in android, so, to prevent force close on Android ICS because of Can't do network operation on UI Thread , I must use the part of code such below or try to start my network operation on other thread, but I don’t want to change the base code, so I should use the code as below on Android ICS. :

static {
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
            .permitAll().build();
    StrictMode.setThreadPolicy(policy);
}

How can I make unique apk file to run in all android version ( >= 1.6 ) ? android.os.StrictMode is accessible for higher version of android, so, i can not try to use the above part of code in my Android Activity. So, which solution is better :

1. Using Reflections to run this part of code on higher versions of API (As oracle docs, reflective operations have slower performance than their non-reflective counterparts)
2. Change my android build target to Android 4.1.1 (API 16) and try to change the android:minSdkVersion on AndroidManifest.xml

Or if you know any better ones, please let me know.

Thanks in advance 🙂

Answer 1

You can use BUILD.VERSION and reflection to get over this compability problem (tested).

    if (Integer.valueOf(android.os.Build.VERSION.SDK_INT) >= 9) {
        try {
            // StrictMode.setThreadPolicy(StrictMode.ThreadPolicy.LAX);
            Class<?> strictModeClass = Class.forName("android.os.StrictMode", true, Thread.currentThread()
                    .getContextClassLoader());
            Class<?> threadPolicyClass = Class.forName("android.os.StrictMode$ThreadPolicy", true, Thread.currentThread()
                    .getContextClassLoader());
            Field laxField = threadPolicyClass.getField("LAX");
            Method setThreadPolicyMethod = strictModeClass.getMethod("setThreadPolicy", threadPolicyClass);
            setThreadPolicyMethod.invoke(strictModeClass, laxField.get(null));
        } catch (Exception e) {
        }
    }