JDK 8 lambda expressions and examples of use in Android Studio

One feature that used to be interesting to Java is that it supports anonymous internal classes, and recently discovered that JDK8 has supported lambda and has a simpler way to implement anonymous internal classes. This will make the programmer more comfortable and prefer Java. Many years ago I think Java Grammar and C # syntax is a bit far behind, without C # so easy to write, now feel jdk8 is also very good. To do the technology or to look forward.

Final TextView txtView2 = (TextView)this = (Button) Findviewbyid (R.id.btnchangetext); Btnchangeview.setonclicklistener (new  View.onclicklistener () {    @Override      publicvoid  OnClick (View v) {        txtview2.settext ("Text changed");    }});

The new implementation method:

Final TextView txtView2 = (TextView)this = (Button) Findviewbyid (r.id.btnchangetext); // Btnchangeview.setonclicklistener (E-log.i ("MyTag", "button Clicked.")); assert NULL   {    "Btnchangeview Clicked:" + View.getid ());    Txtview2.settext (new  Date (). toString ());});

Reference:

Http://stackoverflow.com/questions/37004069/errorjack-is-required-to-support-java-8-language-features

http://www.jianshu.com/p/5fc2b3362702

Configuration needs to be changed: Build.gradle

defaultConfig {  ... jackOptions { enabled true } } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 }

Apply plugin: ' Com.android.application 'Android {compilesdkversion23buildtoolsversion"24.0.2"Defaultconfig {ApplicationID"Com.firstapp.test.firstapp"minsdkversion16targetsdkversion23Versioncode1Versionname"1.0"jackoptions {enabledtrue}} buildtypes {release {minifyenabledfalseproguardfiles Getdefaultproguardfile (' Proguard-android.txt '), ' Proguard-rules.pro '}} compileoptions {sourcecompatibility1.8targetcompatibility1.8}}dependencies {Compile filetree (include: [' *.jar '], dir: ' Libs ') Testcompile' junit:junit:4.12 'Compile' com.android.support:appcompat-v7:23.4.0 '}

JDK 8 lambda expressions and examples of use in Android Studio