java.lang.NoSuchMethodError exception after using getBlockSizeLong method

Question

I created a chat project using android studio 1.0.1
this is the gradle build properties
apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "chat.mchattrav.chattrav"
        minSdkVersion 5
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

when I run the application I get this error message Immediately

unfortunately app has stopped

when I debug the application I get this exception information

java.lang.NoSuchMethodError: android.os.StatFs.getBlockSizeLong

It seems like I used lower api level than "18" which required by this method
can I solve this problem without the need to increase the api level "minSdkVersion"?
can I use the support library instead ?

Answer 1

If you need to support SDK lower then 18, then you need to handle that.

Exists 2 methods:

public int getBlockSize () Added in API1, was deprecated at API18

and

public long getBlockSizeLong () Added in API18

Your project use 2nd one, you need to find all usages and care about running android version, for example

StatFs staFs = new StatFs("path");
long size = 0;
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2){
    size = staFs.getBlockSizeLong();
}else {
    size = staFs.getBlockSize();
}
// use size ...