我试图在AlertDialog中的DatePicker中只显示月份和月份字段。在API 21的先前API中，我可以使用下面的代码来执行此操作。但是当我尝试在API21 +中执行此操作时，“getDeclaredFields（）”甚至不会像“mYearPicker”或“mYearSpinner”字段那样返回。有没有人知道如何我可以只显示日期和月份字段吗？我甚至不知道字段“116”是什么。
我的代码是这样的：
final DatePicker datePickerStart = new DatePicker(new ContextThemeWrapper(getActivity(), android.R.style.Theme_Holo_Light_Dialog_NoActionBar));
datePickerStart .setCalendarViewShown(false);
datePickerStart .setSpinnersShown(true);
try {
Field f[] = datePickerStart .getClass().getDeclaredFields();
for (Field field : f) {
if (field.getName().equals("mYearPicker")|| field.getName().equals("mYearSpinner")) {
field.setAccessible(true);
Object yearPicker = new Object();
yearPicker = field.get(datePickerStart);
((View) yearPicker).setVisibility(View.GONE);
}
}
}
catch (Exception e) {
Log.e("ERROR", e.getMessage());
}
应该是这样的： Before API 21
看起来像这样： API 21+
有什么想法吗？
答案 0 :(得分：-1)
感谢@Morse，我找到了解决方案HERE
05-10 10:28:25.057 15933-15933/com.ragemods W/System: ClassLoader referenced unknown path: /data/app/com.ragemods-1/lib/arm
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05-10 10:28:25.324 15933-15933/com.ragemods D/MediaPlayer: setSubtitleAnchor in MediaPlayer
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05-10 10:28:27.535 15933-15933/com.ragemods V/!!!!!!load!!!!!: loaddone
05-10 10:28:27.542 15933-15933/com.ragemods V/Rage: Rage: on resume called
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05-10 10:28:27.610 15933-16163/com.ragemods I/Adreno-EGL: <qeglDrvAPI_eglInitialize:379>: QUALCOMM Build: 10/21/15, 369a2ea, I96aee987eb
05-10 10:28:27.613 15933-16163/com.ragemods I/OpenGLRenderer: Initialized EGL, version 1.4
05-10 10:28:28.605 15933-16162/com.ragemods V/rage spawn people: Rage spawn people Took 1.0590515 seconds
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05-10 10:29:14.905 15933-15933/com.ragemods V/rage spawn cars: Rage spawn cars Took 0.8807373 seconds
05-10 10:29:14.912 15933-15933/com.ragemods I/Choreographer: Skipped 133 frames! The application may be doing too much work on its main thread.
05-10 10:29:36.407 15933-15940/com.ragemods W/art: Suspending all threads took: 15.502ms
05-10 10:29:51.115 15933-15933/com.ragemods E/MediaPlayer: internal/external state mismatch corrected
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05-10 10:30:13.507 15933-15933/com.ragemods V/rage spawn cars: Rage spawn cars Took 0.86376953 seconds
05-10 10:30:31.199 15933-15933/com.ragemods V/rage spawn people: Rage spawn people Took 0.8010864 seconds
05-10 10:30:32.617 15933-15933/com.ragemods V/rage spawn cars: Rage spawn cars Took 0.9103699 seconds
05-10 10:30:32.621 15933-15933/com.ragemods I/Choreographer: Skipped 134 frames! The application may be doing too much work on its main thread.
05-10 10:30:46.152 15933-15940/com.ragemods W/art: Suspending all threads took: 22.155ms
05-10 10:30:53.682 15933-15944/com.ragemods I/art: Background sticky concurrent mark sweep GC freed 805761(15MB) AllocSpace objects, 0(0B) LOS objects, 33% free, 30MB/45MB, paused 671us total 153.503ms
05-10 10:30:57.850 15933-15989/com.ragemods W/System: ClassLoader referenced unknown path: /data/data/com.ragemods/lib
05-10 10:30:57.937 15933-15933/com.ragemods V/!!!!!!savedone!!!!!: savedone
05-10 10:30:57.939 15933-15933/com.ragemods V/Rage: Rage: on create called
05-10 10:30:57.942 15933-15933/com.ragemods V/Rage: Rage: app context null
05-10 10:30:57.942 15933-15933/com.ragemods V/Rage: Rage: on resume called
05-10 10:30:57.976 15933-16163/com.ragemods V/RenderScript: 0x9f0f5000 Launching thread(s), CPUs 4
05-10 10:31:01.753 15933-15940/com.ragemods W/art: Suspending all threads took: 5.462ms
05-10 10:31:06.486 15933-15944/com.ragemods I/art: Background sticky concurrent mark sweep GC freed 912685(16MB) AllocSpace objects, 0(0B) LOS objects, 34% free, 29MB/45MB, paused 579us total 104.888ms
05-10 10:31:12.996 15933-15944/com.ragemods I/art: Background sticky concurrent mark sweep GC freed 860407(16MB) AllocSpace objects, 0(0B) LOS objects, 34% free, 30MB/45MB, paused 396us total 101.684ms
05-10 10:31:15.471 15933-15933/com.ragemods A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x0 in tid 15933 (com.ragemods)
所以我只需要在需要新的DatePicker对象时调用此方法