java在Android 6.0上使用*简单日期格式*

Question

我确实用这个来设定文本的日期

SimpleDateFormat dateformat = new SimpleDateFormat("dd.MM.YYYY EEEE");
String datetime = dateformat.format(c.getTime());
datex.setText(getString(R.string.tarih) +"  " + datetime);

但它无法在安卓6.0上运行，也无法在安卓7.0及以上版本上运行。我该怎么解决

这是我的错

at java.text.SimpleDateFormat.validatePatternCharacter(SimpleDateFormat.java:323)
        at java.text.SimpleDateFormat.validatePattern(SimpleDateFormat.java:305)
        at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:365)
        at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:258)
        at com.viadom.pomodoroscreen.onCreate(pomodoroscreen.java:136)
        at 安卓.app.Activity.performCreate(Activity.java:6237)
        at 安卓.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
        at 安卓.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
        at 安卓.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
        at 安卓.app.ActivityThread.-wrap11(ActivityThread.java) 
        at 安卓.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
        at 安卓.os.Handler.dispatchMessage(Handler.java:102) 
        at 安卓.os.Looper.loop(Looper.java:148) 
        at 安卓.app.ActivityThread.main(ActivityThread.java:5417) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
        at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
01-29 10:52:31.505 3199-3257/com.viadom E/DynamiteModule: Failed to load IDynamiteLoader from GmsCore: Application package com.google.安卓.gms not found