1、 java.lang.BootstrapMethodError，使用的是okhttp3
2019-02-13 11:37:03.244 23271-23271/com.example.****.myandroidproject E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.****.myandroidproject, PID: 23271
java.lang.BootstrapMethodError: Exception from call site #1 bootstrap method
at okhttp3.internal.Util.
at okhttp3.internal.Util.immutableList(Util.java:234)
at okhttp3.OkHttpClient.
at com.example.yangxiaochun.myandroidproject.activity.OkHttpDemoActivity.initNetWork(OkHttpDemoActivity.java:34)
at com.example.yangxiaochun.myandroidproject.activity.OkHttpDemoActivity.onCreate(OkHttpDemoActivity.java:29)
at android.app.Activity.performCreate(Activity.java:7009)
at android.app.Activity.performCreate(Activity.java:7000)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.NoClassDefFoundError: Invalid descriptor: ()Ljava/lang/Throwable;.
at okhttp3.internal.Util.
at okhttp3.internal.Util.immutableList(Util.java:234)
at okhttp3.OkHttpClient.
at com.example.yangxiaochun.myandroidproject.activity.OkHttpDemoActivity.initNetWork(OkHttpDemoActivity.java:34)
at com.example.yangxiaochun.myandroidproject.activity.OkHttpDemoActivity.onCreate(OkHttpDemoActivity.java:29)
at android.app.Activity.performCreate(Activity.java:7009)
at android.app.Activity.performCreate(Activity.java:7000)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
解决方式：在build.gradle中添加以下代码Java8的新特性
compileOptions{
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}